diff --git a/.changeset/rpc-tracing-spans.md b/.changeset/rpc-tracing-spans.md
new file mode 100644
index 000000000..6cd137aee
--- /dev/null
+++ b/.changeset/rpc-tracing-spans.md
@@ -0,0 +1,5 @@
+---
+'@livekit/agents': patch
+---
+
+Trace RPC calls the agent performs (`rpc_call`) and handles (`rpc_handler`) through the room SDK's `RpcInterceptor` hook. `@livekit/rtc-node` `^1.1.0` is now required, the first release with `LocalParticipant.addRpcInterceptor`.
diff --git a/agents/src/job.test.ts b/agents/src/job.test.ts
index 089931cd7..5ce6adcca 100644
--- a/agents/src/job.test.ts
+++ b/agents/src/job.test.ts
@@ -1,13 +1,14 @@
 // SPDX-FileCopyrightText: 2026 LiveKit, Inc.
 //
 // SPDX-License-Identifier: Apache-2.0
-import { RoomEvent } from '@livekit/rtc-node';
+import { ConnectionState, RoomEvent } from '@livekit/rtc-node';
 import type { Room } from '@livekit/rtc-node';
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 import type { InferenceExecutor } from './ipc/inference_executor.js';
 import { JobContext, type JobProcess, type RunningJobInfo } from './job.js';
 import { log } from './log.js';
 import { SimulationContext, parseSimulationDispatch } from './simulation.js';
+import * as rpcTracing from './telemetry/rpc.js';
 
 const { deleteRoomMock, roomServiceClientMock, setupCloudTracerMock } = vi.hoisted(() => ({
   deleteRoomMock: vi.fn(async () => {}),
@@ -470,3 +471,38 @@ describe('JobContext observability URL', () => {
     expect(setupCloudTracerMock).not.toHaveBeenCalled();
   });
 });
+
+describe('JobContext rpc tracing', () => {
+  it('installs rpc tracing whenever its room connects, however it was connected', () => {
+    // the entrypoint may connect ctx.room itself, with no session and no ctx.connect(): the
+    // job listens to its room, so the hook is there as long as the room is connected
+    const install = vi
+      .spyOn(rpcTracing, 'install')
+      .mockReturnValue({} as unknown as ReturnType<typeof rpcTracing.install>);
+    try {
+      const ctx = createJobContext();
+      const room = ctx.room as unknown as {
+        on: ReturnType<typeof vi.fn>;
+        isConnected: boolean;
+        localParticipant?: unknown;
+      };
+      const onConnectionState = room.on.mock.calls.find(
+        ([event]) => event === RoomEvent.ConnectionStateChanged,
+      )?.[1] as ((state: ConnectionState) => void) | undefined;
+      expect(onConnectionState).toBeDefined();
+
+      onConnectionState!(ConnectionState.CONN_DISCONNECTED);
+      expect(install).not.toHaveBeenCalled();
+
+      room.isConnected = true;
+      room.localParticipant = { identity: 'agent' };
+      onConnectionState!(ConnectionState.CONN_CONNECTED);
+      expect(install).toHaveBeenCalledWith(room.localParticipant, ctx);
+
+      onConnectionState!(ConnectionState.CONN_CONNECTED); // a reconnect installs again
+      expect(install).toHaveBeenCalledTimes(2);
+    } finally {
+      install.mockRestore();
+    }
+  });
+});
diff --git a/agents/src/job.ts b/agents/src/job.ts
index 73ee4c439..651076b43 100644
--- a/agents/src/job.ts
+++ b/agents/src/job.ts
@@ -10,7 +10,7 @@ import type {
   Room,
   RtcConfiguration,
 } from '@livekit/rtc-node';
-import { ParticipantKind, RoomEvent, TrackKind } from '@livekit/rtc-node';
+import { ConnectionState, ParticipantKind, RoomEvent, TrackKind } from '@livekit/rtc-node';
 import { ThrowsPromise } from '@livekit/throws-transformer/throws';
 import type { Context } from '@opentelemetry/api';
 import { RoomServiceClient } from 'livekit-server-sdk';
@@ -31,6 +31,7 @@ import {
   traceTypes,
   uploadSessionReport,
 } from './telemetry/index.js';
+import * as rpcTracing from './telemetry/rpc.js';
 import { sessionSpan } from './telemetry/session_context.js';
 import {
   ATTRIBUTE_REDACTION_ENABLED,
@@ -248,6 +249,14 @@ export class JobContext<ProcessUserData = Record<string, unknown>> {
     // its lk.simulator attribute, and gating on simulationContext() here would
     // miss user-token runs where no dispatch rides the job.
     this.#room.on(RoomEvent.ParticipantDisconnected, this.onParticipantDisconnected);
+    // RPC tracing goes in whenever the room is connected, whether by connect() below, by a
+    // session, or by the entrypoint connecting ctx.room itself. On the SDK's event path the job
+    // is passed explicitly: there is no AsyncLocalStorage there
+    this.#room.on(RoomEvent.ConnectionStateChanged, (state: ConnectionState) => {
+      if (state === ConnectionState.CONN_CONNECTED && this.#room.isConnected) {
+        rpcTracing.install(this.#room.localParticipant, this as JobContext<unknown> as JobContext);
+      }
+    });
     this.#logger = log().child({
       jobId: this.#info.job.id,
       'lk.pii.room_name': this.#info.job.room?.name,
diff --git a/agents/src/telemetry/index.ts b/agents/src/telemetry/index.ts
index 1fd1f1ca7..b1bca8442 100644
--- a/agents/src/telemetry/index.ts
+++ b/agents/src/telemetry/index.ts
@@ -26,6 +26,7 @@ export {
 export * as genAI from './gen_ai.js';
 export { REDACTED_EXCEPTION_MESSAGE } from './redaction.js';
 export * as loopMonitor from './loop_monitor.js';
+export * as rpc from './rpc.js';
 export * as traceTypes from './trace_types.js';
 export {
   discardPreparedCloudTracer,
diff --git a/agents/src/telemetry/rpc.test.ts b/agents/src/telemetry/rpc.test.ts
new file mode 100644
index 000000000..bf1115894
--- /dev/null
+++ b/agents/src/telemetry/rpc.test.ts
@@ -0,0 +1,301 @@
+// SPDX-FileCopyrightText: 2026 LiveKit, Inc.
+//
+// SPDX-License-Identifier: Apache-2.0
+
+/**
+ * RPC tracing (`telemetry.rpc`).
+ *
+ * The interceptor is exercised directly with fake `next` continuations, so these tests run
+ * against any `@livekit/rtc-node` version. With an SDK that has `RpcInterceptor` support the
+ * same interceptor is what `install` registers on the local participant; without it, `install`
+ * is a no-op, which is also covered.
+ */
+import {
+  type LocalParticipant,
+  type RpcCallInfo,
+  RpcError,
+  type RpcInvocationData,
+} from '@livekit/rtc-node';
+import {
+  ROOT_CONTEXT,
+  SpanKind,
+  SpanStatusCode,
+  context as otelContext,
+  trace,
+} from '@opentelemetry/api';
+import { InMemorySpanExporter, SimpleSpanProcessor } from '@opentelemetry/sdk-trace-base';
+import { NodeTracerProvider } from '@opentelemetry/sdk-trace-node';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { type JobContext, getJobContext, runWithJobContext } from '../job.js';
+import { MAX_PAYLOAD_ATTR_LEN, TracingRpcInterceptor, install } from './rpc.js';
+import * as traceTypes from './trace_types.js';
+import { setTracerProvider, tracer } from './traces.js';
+
+function call(overrides: Partial<RpcCallInfo> = {}): RpcCallInfo {
+  return {
+    destinationIdentity: 'avatar-1',
+    method: 'playback.start',
+    payload: '{"id": 7}',
+    responseTimeout: 5000,
+    ...overrides,
+  };
+}
+
+function invocation(overrides: Partial<RpcInvocationData> = {}): RpcInvocationData {
+  return {
+    requestId: 'req-42',
+    callerIdentity: 'client-9',
+    payload: '{"q": "x"}',
+    responseTimeout: 10_000,
+    method: 'agent.lookup',
+    ...overrides,
+  };
+}
+
+function fakeParticipant(addRpcInterceptor: (i: unknown) => void): LocalParticipant {
+  return { identity: 'agent', addRpcInterceptor } as unknown as LocalParticipant;
+}
+
+describe.sequential('rpc tracing', () => {
+  let exporter: InMemorySpanExporter;
+  let provider: NodeTracerProvider;
+  let originalProvider: ReturnType<typeof tracer.getProvider>;
+  let interceptor: TracingRpcInterceptor;
+
+  beforeEach(() => {
+    originalProvider = tracer.getProvider();
+    exporter = new InMemorySpanExporter();
+    provider = new NodeTracerProvider({ spanProcessors: [new SimpleSpanProcessor(exporter)] });
+    // the context manager, so a span made active in the test is the parent of the RPC span
+    provider.register();
+    setTracerProvider(provider);
+    interceptor = new TracingRpcInterceptor();
+  });
+
+  afterEach(async () => {
+    setTracerProvider(originalProvider);
+    await provider.shutdown();
+    otelContext.disable();
+    trace.disable();
+    vi.restoreAllMocks();
+  });
+
+  function spans(name: string) {
+    return exporter.getFinishedSpans().filter((span) => span.name === name);
+  }
+
+  it('nests the outgoing call span under the caller', async () => {
+    let parentSpanId = '';
+    const result = await tracer.startActiveSpan(
+      async (parent) => {
+        parentSpanId = parent.spanContext().spanId;
+        return interceptor.interceptOutgoing(call(), async () => 'ok!');
+      },
+      { name: 'function_tool' },
+    );
+
+    expect(result).toBe('ok!');
+    const [span] = spans('rpc_call');
+    expect(span).toBeDefined();
+    expect(span!.kind).toBe(SpanKind.CLIENT);
+    expect(span!.parentSpanContext?.spanId).toBe(parentSpanId);
+    expect(span!.attributes).toMatchObject({
+      [traceTypes.ATTR_RPC_METHOD]: 'playback.start',
+      [traceTypes.ATTR_RPC_DESTINATION_IDENTITY]: 'avatar-1',
+      [traceTypes.ATTR_RPC_PAYLOAD]: '{"id": 7}',
+      [traceTypes.ATTR_RPC_PAYLOAD_SIZE]: 9,
+      [traceTypes.ATTR_RPC_RESPONSE]: 'ok!',
+      [traceTypes.ATTR_RPC_RESPONSE_SIZE]: 3,
+      [traceTypes.ATTR_RPC_RESPONSE_TIMEOUT]: 5, // seconds on the span, ms in the SDK
+    });
+    expect(span!.status.code).toBe(SpanStatusCode.UNSET);
+  });
+
+  it('records the code and error status of a failed outgoing call', async () => {
+    const error = RpcError.builtIn('RECIPIENT_NOT_FOUND');
+    await expect(
+      interceptor.interceptOutgoing(call(), async () => {
+        throw error;
+      }),
+    ).rejects.toBe(error);
+
+    const [span] = spans('rpc_call');
+    expect(span!.attributes[traceTypes.ATTR_RPC_ERROR_CODE]).toBe(
+      RpcError.ErrorCode.RECIPIENT_NOT_FOUND,
+    );
+    expect(span!.status.code).toBe(SpanStatusCode.ERROR);
+    expect(span!.events.some((event) => event.name === 'exception')).toBe(true);
+  });
+
+  it('truncates the payload and keeps its size', async () => {
+    const payload = 'x'.repeat(MAX_PAYLOAD_ATTR_LEN + 500);
+    await interceptor.interceptOutgoing(
+      call({ payload, responseTimeout: undefined }),
+      async () => '',
+    );
+
+    const [span] = spans('rpc_call');
+    const attrs = span!.attributes;
+    expect((attrs[traceTypes.ATTR_RPC_PAYLOAD] as string).length).toBe(MAX_PAYLOAD_ATTR_LEN);
+    expect(attrs[traceTypes.ATTR_RPC_PAYLOAD_SIZE]).toBe(payload.length);
+    expect(attrs).not.toHaveProperty(traceTypes.ATTR_RPC_RESPONSE_TIMEOUT);
+    expect(attrs[traceTypes.ATTR_RPC_RESPONSE_SIZE]).toBe(0);
+    expect(attrs).not.toHaveProperty(traceTypes.ATTR_RPC_RESPONSE); // empty: not recorded
+  });
+
+  it('truncates the response like the request', async () => {
+    const response = 'y'.repeat(MAX_PAYLOAD_ATTR_LEN + 10);
+    await interceptor.interceptIncoming(invocation(), async () => response);
+
+    const [span] = spans('rpc_handler');
+    expect((span!.attributes[traceTypes.ATTR_RPC_RESPONSE] as string).length).toBe(
+      MAX_PAYLOAD_ATTR_LEN,
+    );
+    expect(span!.attributes[traceTypes.ATTR_RPC_RESPONSE_SIZE]).toBe(response.length);
+  });
+
+  it('measures payload sizes in bytes, not characters', async () => {
+    await interceptor.interceptOutgoing(call({ payload: 'héllo' }), async () => '');
+    const [span] = spans('rpc_call');
+    expect(span!.attributes[traceTypes.ATTR_RPC_PAYLOAD_SIZE]).toBe(6);
+  });
+
+  it('traces an incoming invocation as a server span', async () => {
+    const result = await interceptor.interceptIncoming(invocation(), async () => 'found');
+
+    expect(result).toBe('found');
+    const [span] = spans('rpc_handler');
+    expect(span!.kind).toBe(SpanKind.SERVER);
+    expect(span!.attributes).toMatchObject({
+      [traceTypes.ATTR_RPC_METHOD]: 'agent.lookup',
+      [traceTypes.ATTR_RPC_REQUEST_ID]: 'req-42',
+      [traceTypes.ATTR_RPC_CALLER_IDENTITY]: 'client-9',
+      [traceTypes.ATTR_RPC_RESPONSE_TIMEOUT]: 10,
+      [traceTypes.ATTR_RPC_RESPONSE]: 'found',
+      [traceTypes.ATTR_RPC_RESPONSE_SIZE]: 5,
+    });
+  });
+
+  it('parents the handler span to the primary session root, not the dispatching task', async () => {
+    const sessionRoot = tracer.startSpan({ name: 'agent_session' });
+    const job = {
+      _primaryAgentSession: { rootSpanContext: trace.setSpan(ROOT_CONTEXT, sessionRoot) },
+      job: { id: 'AJ_test' },
+    } as unknown as JobContext;
+
+    await tracer.startActiveSpan(
+      () =>
+        runWithJobContext(job, () => interceptor.interceptIncoming(invocation(), async () => '')),
+      { name: 'sdk_dispatch_task' },
+    );
+    sessionRoot.end();
+
+    const [span] = spans('rpc_handler');
+    expect(span!.parentSpanContext?.spanId).toBe(sessionRoot.spanContext().spanId);
+  });
+
+  it('parents the handler span to the job root when no session is running', async () => {
+    const jobRoot = tracer.startSpan({ name: 'job_entrypoint' });
+    const job = {
+      _jobSpanContext: trace.setSpan(ROOT_CONTEXT, jobRoot),
+      job: { id: 'AJ_test' },
+    } as unknown as JobContext;
+
+    await tracer.startActiveSpan(
+      () =>
+        runWithJobContext(job, () => interceptor.interceptIncoming(invocation(), async () => '')),
+      { name: 'sdk_dispatch_task' },
+    );
+    jobRoot.end();
+
+    const [span] = spans('rpc_handler');
+    expect(span!.parentSpanContext?.spanId).toBe(jobRoot.spanContext().spanId);
+  });
+
+  it('records the error code of a handler that throws an RpcError', async () => {
+    const error = RpcError.builtIn('APPLICATION_ERROR');
+    await expect(
+      interceptor.interceptIncoming(invocation(), async () => {
+        throw error;
+      }),
+    ).rejects.toBe(error);
+
+    const [span] = spans('rpc_handler');
+    expect(span!.attributes[traceTypes.ATTR_RPC_ERROR_CODE]).toBe(
+      RpcError.ErrorCode.APPLICATION_ERROR,
+    );
+    expect(span!.status.code).toBe(SpanStatusCode.ERROR);
+  });
+
+  it('records a handler exception', async () => {
+    const boom = new Error('bad request body');
+    await expect(
+      interceptor.interceptIncoming(invocation(), async () => {
+        throw boom;
+      }),
+    ).rejects.toBe(boom);
+
+    const [span] = spans('rpc_handler');
+    expect(span!.status.code).toBe(SpanStatusCode.ERROR);
+    expect(span!.attributes).not.toHaveProperty(traceTypes.ATTR_RPC_ERROR_CODE);
+  });
+
+  it('restores the installed job for invocations dispatched outside its context', async () => {
+    // the SDK's FFI event path carries no AsyncLocalStorage: without the job captured at
+    // install, neither the session root nor the job root would resolve and the handler span
+    // would be a root of its own
+    const sessionRoot = tracer.startSpan({ name: 'agent_session' });
+    const job = {
+      _primaryAgentSession: { rootSpanContext: trace.setSpan(ROOT_CONTEXT, sessionRoot) },
+      job: { id: 'AJ_test' },
+    } as unknown as JobContext;
+    const installed = install(fakeParticipant(vi.fn()), job);
+
+    let seenJob: JobContext | undefined;
+    await installed.interceptIncoming(invocation(), async () => {
+      seenJob = getJobContext(false);
+      return '';
+    });
+    sessionRoot.end();
+
+    const [span] = spans('rpc_handler');
+    expect(span!.parentSpanContext?.spanId).toBe(sessionRoot.spanContext().spanId);
+    expect(seenJob).toBe(job); // the handler itself runs inside the job too
+  });
+
+  it('installs one interceptor per job, the same one on every connect', () => {
+    const jobA = { job: { id: 'AJ_a' } } as unknown as JobContext;
+    const jobB = { job: { id: 'AJ_b' } } as unknown as JobContext;
+    const addRpcInterceptor = vi.fn();
+    const participant = fakeParticipant(addRpcInterceptor);
+    const first = install(participant, jobA);
+    const again = install(participant, jobA); // a reconnect
+    const other = install(participant, jobB);
+    // the same instance for a job each time: the SDK keeps one registration per instance
+    expect(again).toBe(first);
+    expect(other).not.toBe(first);
+    expect(addRpcInterceptor.mock.calls.map(([i]) => i)).toEqual([first, first, other]);
+
+    // no participant yet (the room is not connected): nothing to install on
+    expect(() => install(undefined, jobA)).not.toThrow();
+    // a participant without the hook (an older SDK, a stand-in): tracing steps aside rather
+    // than break the connection it is installed from
+    expect(() => install({ identity: 'agent' } as unknown as LocalParticipant, jobA)).not.toThrow();
+  });
+
+  it('routes an invocation to the job its participant was installed for', async () => {
+    // two jobs in one process: each participant's invocations run under their own job, not
+    // the last one installed
+    const jobA = { job: { id: 'AJ_a' } } as unknown as JobContext;
+    const jobB = { job: { id: 'AJ_b' } } as unknown as JobContext;
+    const forA = install(fakeParticipant(vi.fn()), jobA);
+    install(fakeParticipant(vi.fn()), jobB);
+
+    let seenJob: JobContext | undefined;
+    await forA.interceptIncoming(invocation(), async () => {
+      seenJob = getJobContext(false);
+      return '';
+    });
+    expect(seenJob).toBe(jobA);
+  });
+});
diff --git a/agents/src/telemetry/rpc.ts b/agents/src/telemetry/rpc.ts
new file mode 100644
index 000000000..51ed7fe1a
--- /dev/null
+++ b/agents/src/telemetry/rpc.ts
@@ -0,0 +1,184 @@
+// SPDX-FileCopyrightText: 2026 LiveKit, Inc.
+//
+// SPDX-License-Identifier: Apache-2.0
+
+/**
+ * Trace RPCs the agent performs and handles.
+ *
+ * The room SDK exposes an `RpcInterceptor` hook (`@livekit/rtc-node` with
+ * `LocalParticipant.addRpcInterceptor`) that wraps every call made through `performRpc` and
+ * every invocation dispatched to a registered handler. This module installs one interceptor per
+ * job on its local participant that turns each call into a span following the OpenTelemetry RPC
+ * semantic conventions:
+ *
+ * - `rpc_call` (`SpanKind.CLIENT`) for outgoing calls, under whatever span is current where the
+ *   call is made (an RPC issued from a tool nests under `function_tool`);
+ * - `rpc_handler` (`SpanKind.SERVER`) for incoming invocations, under the primary agent
+ *   session's root span, else the job's root (`job_entrypoint`): the SDK dispatches them on a
+ *   task whose context carries neither.
+ *
+ * Payloads are recorded truncated under `lk.pii` keys. Participant identities are application
+ * identifiers, not end-user data, and are recorded as is.
+ */
+import {
+  type IncomingRpcNext,
+  type LocalParticipant,
+  type OutgoingRpcNext,
+  type RpcCallInfo,
+  RpcError,
+  type RpcInterceptor,
+  type RpcInvocationData,
+} from '@livekit/rtc-node';
+import { type Attributes, SpanKind } from '@opentelemetry/api';
+import { type JobContext, getJobContext, runWithJobContext } from '../job.js';
+import { jobRootContext, sessionRootContext } from './session_context.js';
+import * as traceTypes from './trace_types.js';
+import { tracer } from './traces.js';
+import { recordException } from './utils.js';
+
+/** Request and response payloads longer than this many characters are truncated in span attributes. */
+export const MAX_PAYLOAD_ATTR_LEN = 1024;
+
+function truncate(payload: string): string {
+  return payload.slice(0, MAX_PAYLOAD_ATTR_LEN);
+}
+
+function payloadAttributes(payload: string): Attributes {
+  const attrs: Attributes = {
+    [traceTypes.ATTR_RPC_PAYLOAD_SIZE]: Buffer.byteLength(payload, 'utf8'),
+  };
+  if (payload) attrs[traceTypes.ATTR_RPC_PAYLOAD] = truncate(payload);
+  return attrs;
+}
+
+function responseAttributes(response: string | undefined | null): Attributes {
+  const text = response ?? '';
+  const attrs: Attributes = {
+    [traceTypes.ATTR_RPC_RESPONSE_SIZE]: Buffer.byteLength(text, 'utf8'),
+  };
+  if (text) attrs[traceTypes.ATTR_RPC_RESPONSE] = truncate(text);
+  return attrs;
+}
+
+function toError(error: unknown): Error {
+  return error instanceof Error ? error : new Error(String(error));
+}
+
+/**
+ * An `RpcInterceptor` emitting `rpc_call` / `rpc_handler` spans. Bound to the job it was
+ * installed for: incoming invocations arrive outside that job's context (see interceptIncoming).
+ */
+export class TracingRpcInterceptor implements RpcInterceptor {
+  constructor(private readonly job?: JobContext) {}
+
+  async interceptOutgoing(call: RpcCallInfo, next: OutgoingRpcNext): Promise<string> {
+    const attributes: Attributes = {
+      [traceTypes.ATTR_RPC_METHOD]: call.method,
+      [traceTypes.ATTR_RPC_DESTINATION_IDENTITY]: call.destinationIdentity,
+      ...payloadAttributes(call.payload),
+    };
+    if (call.responseTimeout !== undefined) {
+      attributes[traceTypes.ATTR_RPC_RESPONSE_TIMEOUT] = call.responseTimeout / 1000;
+    }
+
+    return tracer.startActiveSpan(
+      async (span) => {
+        let response: string;
+        try {
+          response = await next(call);
+        } catch (error) {
+          if (error instanceof RpcError) {
+            span.setAttribute(traceTypes.ATTR_RPC_ERROR_CODE, Number(error.code));
+          }
+          recordException(span, toError(error));
+          throw error;
+        }
+        span.setAttributes(responseAttributes(response));
+        return response;
+      },
+      { name: 'rpc_call', kind: SpanKind.CLIENT, attributes },
+    );
+  }
+
+  async interceptIncoming(invocation: RpcInvocationData, next: IncomingRpcNext): Promise<string> {
+    // the SDK dispatches invocations from its FFI event path, outside the job's
+    // AsyncLocalStorage: restore the job this interceptor was installed for so the session and
+    // job roots resolve (and the handler sees getJobContext(), as a Python handler does)
+    const job = getJobContext(false) ?? this.job;
+    if (job !== undefined && getJobContext(false) === undefined) {
+      return runWithJobContext(job, () => this.handleIncoming(invocation, next));
+    }
+    return this.handleIncoming(invocation, next);
+  }
+
+  private async handleIncoming(
+    invocation: RpcInvocationData,
+    next: IncomingRpcNext,
+  ): Promise<string> {
+    const attributes: Attributes = {
+      [traceTypes.ATTR_RPC_METHOD]: invocation.method,
+      [traceTypes.ATTR_RPC_REQUEST_ID]: invocation.requestId,
+      [traceTypes.ATTR_RPC_CALLER_IDENTITY]: invocation.callerIdentity,
+      [traceTypes.ATTR_RPC_RESPONSE_TIMEOUT]: invocation.responseTimeout / 1000,
+      ...payloadAttributes(invocation.payload),
+    };
+
+    return tracer.startActiveSpan(
+      async (span) => {
+        let response: string;
+        try {
+          response = await next(invocation);
+        } catch (error) {
+          if (error instanceof RpcError) {
+            span.setAttribute(traceTypes.ATTR_RPC_ERROR_CODE, Number(error.code));
+          }
+          recordException(span, toError(error));
+          throw error;
+        }
+        span.setAttributes(responseAttributes(response));
+        return response;
+      },
+      {
+        name: 'rpc_handler',
+        // the session timeline, from whatever task the SDK dispatches on; before or after the
+        // session, the job's own timeline
+        context: sessionRootContext() ?? jobRootContext(),
+        kind: SpanKind.SERVER,
+        attributes,
+      },
+    );
+  }
+}
+
+/** One interceptor per job, so a process hosting several jobs routes each invocation to its own. */
+const interceptors = new WeakMap<JobContext, TracingRpcInterceptor>();
+let joblessInterceptor: TracingRpcInterceptor | undefined;
+
+/** The interceptor for `job` (or the one shared outside any job), created on first use. */
+function interceptorFor(job: JobContext | undefined): TracingRpcInterceptor {
+  if (job === undefined) return (joblessInterceptor ??= new TracingRpcInterceptor());
+  let interceptor = interceptors.get(job);
+  if (!interceptor) {
+    interceptor = new TracingRpcInterceptor(job);
+    interceptors.set(job, interceptor);
+  }
+  return interceptor;
+}
+
+/**
+ * Trace RPCs on `localParticipant` for `jobCtx` (else the current job). Idempotent: one
+ * interceptor per job, and the SDK keeps one registration per interceptor instance, so every
+ * connect and reconnect may install again. A missing participant (the room is not connected
+ * yet), or one without the interceptor hook (an older room SDK, a stand-in in tests), installs
+ * nothing: tracing must never be what breaks a connection. Returns the interceptor.
+ */
+export function install(
+  localParticipant: LocalParticipant | undefined,
+  jobCtx?: JobContext,
+): TracingRpcInterceptor {
+  const interceptor = interceptorFor(jobCtx ?? getJobContext(false));
+  if (typeof localParticipant?.addRpcInterceptor === 'function') {
+    localParticipant.addRpcInterceptor(interceptor);
+  }
+  return interceptor;
+}
diff --git a/agents/src/telemetry/startup_spans.test.ts b/agents/src/telemetry/startup_spans.test.ts
index e36fea67e..9b853e4ab 100644
--- a/agents/src/telemetry/startup_spans.test.ts
+++ b/agents/src/telemetry/startup_spans.test.ts
@@ -47,7 +47,7 @@ function mockRoom(overrides: Record<string, unknown> = {}): Room {
     connect: vi.fn(async () => undefined),
     isConnected: false,
     remoteParticipants: new Map(),
-    localParticipant: { sid: 'PA_agent', identity: 'agent-1' },
+    localParticipant: { sid: 'PA_agent', identity: 'agent-1', addRpcInterceptor: vi.fn() },
     ...overrides,
   } as unknown as Room;
 }
diff --git a/agents/src/telemetry/trace_types.test.ts b/agents/src/telemetry/trace_types.test.ts
index 5490d5f7c..5573535f7 100644
--- a/agents/src/telemetry/trace_types.test.ts
+++ b/agents/src/telemetry/trace_types.test.ts
@@ -186,6 +186,15 @@ const SAFE_KEYS = new Set([
   'lk.disconnect_reason',
   'lk.old_state',
   'lk.new_state',
+  // rpc (semconv names, ids, sizes, codes; the payload keys are tagged)
+  'rpc.method',
+  'lk.rpc.request_id',
+  'lk.rpc.caller_identity',
+  'lk.rpc.destination_identity',
+  'lk.rpc.payload_size',
+  'lk.rpc.response_size',
+  'lk.rpc.response_timeout',
+  'lk.rpc.error_code',
   'lk.close_reason',
   'lk.close.drain',
   'lk.shutdown.reason',
diff --git a/agents/src/telemetry/trace_types.ts b/agents/src/telemetry/trace_types.ts
index 494eddaee..4469a3dc1 100644
--- a/agents/src/telemetry/trace_types.ts
+++ b/agents/src/telemetry/trace_types.ts
@@ -86,6 +86,24 @@ export const ATTR_DISCONNECT_REASON = 'lk.disconnect_reason';
 export const ATTR_OLD_STATE = 'lk.old_state';
 export const ATTR_NEW_STATE = 'lk.new_state';
 
+// rpc (`rpc.method` from the OpenTelemetry RPC semantic conventions, plus lk.rpc.* details)
+export const ATTR_RPC_METHOD = 'rpc.method';
+export const ATTR_RPC_REQUEST_ID = 'lk.rpc.request_id';
+export const ATTR_RPC_CALLER_IDENTITY = 'lk.rpc.caller_identity';
+export const ATTR_RPC_DESTINATION_IDENTITY = 'lk.rpc.destination_identity';
+/** Request payload, truncated to `telemetry.rpc.MAX_PAYLOAD_ATTR_LEN` characters. */
+export const ATTR_RPC_PAYLOAD = 'lk.pii.rpc.payload';
+/** Request payload size in bytes, before truncation. */
+export const ATTR_RPC_PAYLOAD_SIZE = 'lk.rpc.payload_size';
+/** Response payload, truncated like the request. */
+export const ATTR_RPC_RESPONSE = 'lk.pii.rpc.response';
+/** Response payload size in bytes, before truncation. */
+export const ATTR_RPC_RESPONSE_SIZE = 'lk.rpc.response_size';
+/** Seconds the caller waits for a response. */
+export const ATTR_RPC_RESPONSE_TIMEOUT = 'lk.rpc.response_timeout';
+/** The `RpcError` code the call failed with. */
+export const ATTR_RPC_ERROR_CODE = 'lk.rpc.error_code';
+
 // session close / job shutdown
 export const ATTR_CLOSE_REASON = 'lk.close_reason';
 export const ATTR_CLOSE_DRAIN = 'lk.close.drain';
diff --git a/agents/src/telemetry/traces.ts b/agents/src/telemetry/traces.ts
index 3af76f7c3..6f7e00054 100644
--- a/agents/src/telemetry/traces.ts
+++ b/agents/src/telemetry/traces.ts
@@ -8,6 +8,7 @@ import {
   type Context,
   ProxyTracerProvider,
   type Span,
+  type SpanKind,
   type SpanOptions,
   type Tracer,
   type TracerProvider,
@@ -73,6 +74,8 @@ export interface StartSpanOptions {
   endOnExit?: boolean;
   /** Optional start time for the span in milliseconds (Date.now() format) */
   startTime?: number;
+  /** The span's kind (client, server, ...); defaults to INTERNAL */
+  kind?: SpanKind;
 }
 
 /**
@@ -147,6 +150,7 @@ class DynamicTracer {
       {
         attributes: options.attributes,
         startTime: options.startTime,
+        kind: options.kind,
       },
       ctx,
     );
@@ -165,7 +169,11 @@ class DynamicTracer {
   async startActiveSpan<T>(fn: (span: Span) => Promise<T>, options: StartSpanOptions): Promise<T> {
     const ctx = options.context || otelContext.active();
     const endOnExit = options.endOnExit === undefined ? true : options.endOnExit; // default true
-    const opts: SpanOptions = { attributes: options.attributes, startTime: options.startTime };
+    const opts: SpanOptions = {
+      attributes: options.attributes,
+      startTime: options.startTime,
+      kind: options.kind,
+    };
 
     // Directly return the tracer's startActiveSpan result - it handles async correctly
     return await this.tracer.startActiveSpan(options.name, opts, ctx, async (span) => {
@@ -210,7 +218,11 @@ class DynamicTracer {
   startActiveSpanSync<T>(fn: (span: Span) => T, options: StartSpanOptions): T {
     const ctx = options.context || otelContext.active();
     const endOnExit = options.endOnExit === undefined ? true : options.endOnExit; // default true
-    const opts: SpanOptions = { attributes: options.attributes, startTime: options.startTime };
+    const opts: SpanOptions = {
+      attributes: options.attributes,
+      startTime: options.startTime,
+      kind: options.kind,
+    };
 
     return this.tracer.startActiveSpan(options.name, opts, ctx, (span) => {
       try {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 1333b95c2..0b0a017c1 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -7,8 +7,8 @@ settings:
 catalogs:
   default:
     '@livekit/rtc-node':
-      specifier: ^0.13.34
-      version: 0.13.34
+      specifier: ^1.1.0
+      version: 1.1.0
     '@types/ws':
       specifier: ^8.5.10
       version: 8.18.1
@@ -237,7 +237,7 @@ importers:
     devDependencies:
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@22.19.1)
@@ -360,7 +360,7 @@ importers:
         version: 0.1.9
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@opentelemetry/api':
         specifier: ^1.9.0
         version: 1.9.0
@@ -434,7 +434,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -462,7 +462,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -493,7 +493,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -518,7 +518,7 @@ importers:
         version: link:../../agents
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -552,7 +552,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@22.19.1)
@@ -580,7 +580,7 @@ importers:
         version: link:../../agents
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -617,7 +617,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -651,7 +651,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -685,7 +685,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -710,7 +710,7 @@ importers:
         version: link:../../agents
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -744,7 +744,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -778,7 +778,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -824,7 +824,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -851,7 +851,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -879,7 +879,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -897,7 +897,7 @@ importers:
     dependencies:
       '@livekit/plugins-krisp-viva-internal':
         specifier: 0.2.0
-        version: 0.2.0(@livekit/agents@agents)(@livekit/rtc-node@0.13.34)
+        version: 0.2.0(@livekit/agents@agents)(@livekit/rtc-node@1.1.0)
     devDependencies:
       '@livekit/agents':
         specifier: workspace:*
@@ -910,7 +910,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -941,7 +941,7 @@ importers:
         version: link:../../agents
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -972,7 +972,7 @@ importers:
         version: link:../../agents
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1028,7 +1028,7 @@ importers:
         version: link:../../agents
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1056,7 +1056,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1081,7 +1081,7 @@ importers:
         version: link:../../agents
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1109,7 +1109,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1140,7 +1140,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1180,7 +1180,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1211,7 +1211,7 @@ importers:
         version: link:../openai
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1233,7 +1233,7 @@ importers:
         version: link:../../agents
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1255,7 +1255,7 @@ importers:
         version: link:../../agents
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1286,7 +1286,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1329,7 +1329,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1354,7 +1354,7 @@ importers:
         version: link:../../agents
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1388,7 +1388,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1419,7 +1419,7 @@ importers:
         version: 0.2.7
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1447,7 +1447,7 @@ importers:
         version: link:../../agents
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1472,7 +1472,7 @@ importers:
         version: link:../../agents
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1503,7 +1503,7 @@ importers:
         version: link:../../agents
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@types/node':
         specifier: ^22.5.5
         version: 22.19.1
@@ -1528,7 +1528,7 @@ importers:
         version: link:../../agents
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -1565,7 +1565,7 @@ importers:
         version: link:../test
       '@livekit/rtc-node':
         specifier: 'catalog:'
-        version: 0.13.34
+        version: 1.1.0
       '@microsoft/api-extractor':
         specifier: ^7.58.12
         version: 7.58.12(@types/node@25.6.0)
@@ -2482,6 +2482,10 @@ packages:
     resolution: {integrity: sha512-22EWklyNUGJ5EamOcC/eUnLy0Gu3SpzxzUkuXCixCequwNDmj8PGjKgtpWThlqTWkzvh9xsAKmQoDWhlXhkrzA==}
     engines: {node: '>= 18'}
 
+  '@livekit/rtc-node@1.1.0':
+    resolution: {integrity: sha512-KFNvPz7qQSJBTttDukanhMJ+bCNxj6O3A3fXl6GJvOEamJJk7GqKCWgAdLW3JLjuT1pPQDyQPJJnYdR25N+MXA==}
+    engines: {node: '>= 18'}
+
   '@livekit/throws-transformer@0.1.8':
     resolution: {integrity: sha512-AaSwQfIaG6YArKOCO+5/DgI8HfL19oHdrkyI0LJJVCqGeZXzPsZIO/Nm/SKUHbT1ERGhF5c34X8CcVWeOePpIQ==}
     hasBin: true
@@ -6260,10 +6264,10 @@ snapshots:
   '@livekit/plugins-krisp-viva-aarch64-unknown-linux-gnu@0.2.0':
     optional: true
 
-  '@livekit/plugins-krisp-viva-internal@0.2.0(@livekit/agents@agents)(@livekit/rtc-node@0.13.34)':
+  '@livekit/plugins-krisp-viva-internal@0.2.0(@livekit/agents@agents)(@livekit/rtc-node@1.1.0)':
     dependencies:
       '@livekit/agents': link:agents
-      '@livekit/rtc-node': 0.13.34
+      '@livekit/rtc-node': 1.1.0
       ffi-rs: 1.3.2
       pino: 9.6.0
       pino-pretty: 13.0.0
@@ -6326,6 +6330,15 @@ snapshots:
       pino: 9.6.0
       pino-pretty: 13.0.0
 
+  '@livekit/rtc-node@1.1.0':
+    dependencies:
+      '@datastructures-js/deque': 1.0.8
+      '@livekit/mutex': 1.1.1
+      '@livekit/rtc-ffi-bindings': 0.12.73
+      '@livekit/typed-emitter': 3.0.0
+      pino: 9.6.0
+      pino-pretty: 13.0.0
+
   '@livekit/throws-transformer@0.1.8(typescript@5.9.3)':
     dependencies:
       glob: 13.0.6
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index 985da184d..bce6271e1 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -28,7 +28,7 @@ minimumReleaseAgeExclude:
   - sharp@0.35.4
 
 catalog:
-  '@livekit/rtc-node': ^0.13.34
+  '@livekit/rtc-node': ^1.1.0
   ws: ^8.21.0
   '@types/ws': ^8.5.10