diff --git a/SPEC.md b/SPEC.md
index fac150c..5137ecc 100644
--- a/SPEC.md
+++ b/SPEC.md
@@ -779,7 +779,12 @@ export interface AgentSignupResult {
   `signupGrantApplied`; keep `id`, `email`, `status`, `createdAt`, `onboardingComplete`).
 - `catalog(options?)` -> category-only GET `/v1/apis?category=` -> `CatalogEntry[]`.
 - `search(options)` -> dedicated GET `/catalog/search?q=&category=&platform=&limit=` ->
-  `{ results, total, ranking }` with nested pricing and relevance.
+  `{ results, total, ranking }` with nested pricing and relevance. The gateway accepts any
+  non-empty combination of `q`, `category`, and `platform`, so a scope with no query at all
+  is a valid search and `query` is optional in both readers. An absent or empty query omits
+  `q` from the query string rather than sending it empty, which is a different request. A
+  call naming none of the three never reaches the gateway: the reader raises `AnyAPIError`
+  with status `0`.
 - `describe(slug)` -> GET `/v1/apis/{slug}` -> one `CatalogEntry`. 404 -> `NotFoundError`.
 - Browse, search, and detail carry the gateway-authored `method`, `path`, and `execution.mode`
   unchanged. Ranked search also carries the gateway's `failover`, optional
diff --git a/packages/python/src/getanyapi/_account.py b/packages/python/src/getanyapi/_account.py
index 8a1261e..976b945 100644
--- a/packages/python/src/getanyapi/_account.py
+++ b/packages/python/src/getanyapi/_account.py
@@ -49,13 +49,26 @@ def catalog_request(category: str | None) -> tuple[str, dict[str, str]]:
 
 
 def search_request(
-    query: str,
+    query: str | None,
     category: str | None,
     platform: str | None,
     limit: int | None,
 ) -> tuple[str, dict[str, str]]:
-    """Path and query params for dedicated ranked discovery search."""
-    params = {"q": query}
+    """Path and query params for dedicated ranked discovery search.
+
+    The gateway needs at least one of query, category or platform, in any
+    combination, so a scope with no query at all is a valid search. An absent or
+    empty query omits ``q`` entirely, because an empty ``q`` is a different
+    request.
+    """
+    if not query and category is None and platform is None:
+        raise AnyAPIError(
+            "search needs at least one of query, category, or platform",
+            status=0,
+        )
+    params: dict[str, str] = {}
+    if query:
+        params["q"] = query
     if category is not None:
         params["category"] = category
     if platform is not None:
diff --git a/packages/python/src/getanyapi/_async_client.py b/packages/python/src/getanyapi/_async_client.py
index b4f0475..5e01e6e 100644
--- a/packages/python/src/getanyapi/_async_client.py
+++ b/packages/python/src/getanyapi/_async_client.py
@@ -370,7 +370,7 @@ async def catalog(self, *, category: str | None = None) -> list[CatalogEntry]:
     async def search(
         self,
         *,
-        query: str,
+        query: str | None = None,
         category: str | None = None,
         platform: str | None = None,
         limit: int | None = None,
diff --git a/packages/python/src/getanyapi/_client.py b/packages/python/src/getanyapi/_client.py
index c624a97..6c3f3d0 100644
--- a/packages/python/src/getanyapi/_client.py
+++ b/packages/python/src/getanyapi/_client.py
@@ -398,7 +398,7 @@ def catalog(self, *, category: str | None = None) -> list[CatalogEntry]:
     def search(
         self,
         *,
-        query: str,
+        query: str | None = None,
         category: str | None = None,
         platform: str | None = None,
         limit: int | None = None,
diff --git a/packages/python/tests/test_account.py b/packages/python/tests/test_account.py
index 81631d3..b909eb6 100644
--- a/packages/python/tests/test_account.py
+++ b/packages/python/tests/test_account.py
@@ -12,6 +12,7 @@
 
 from conftest import json_response, make_async_client, make_sync_client
 from getanyapi import (
+    AnyAPIError,
     DiscoveryPricing,
     FlatPricingOffer,
     LinearPricingOffer,
@@ -331,6 +332,40 @@ def respond(req: httpx.Request) -> httpx.Response:
     assert found.model_dump(by_alias=True, exclude_defaults=True) == body
 
 
+def test_search_scopes_without_a_query_and_omits_q_entirely() -> None:
+    body = discovery_search()
+
+    def respond(req: httpx.Request) -> httpx.Response:
+        assert req.url.path == "/catalog/search"
+        assert dict(req.url.params) == {"platform": "reddit"}
+        return json_response(200, body)
+
+    client, _ = make_sync_client(respond)
+    assert client.search(platform="reddit").results
+
+
+def test_search_omits_an_empty_query_rather_than_sending_it_empty() -> None:
+    body = discovery_search()
+
+    def respond(req: httpx.Request) -> httpx.Response:
+        assert "q" not in dict(req.url.params)
+        return json_response(200, body)
+
+    client, _ = make_sync_client(respond)
+    assert client.search(query="", category="social").results
+
+
+def test_search_without_query_category_or_platform_never_calls_the_gateway() -> None:
+    client, recorder = make_sync_client(
+        lambda _req: json_response(200, discovery_search())
+    )
+    with pytest.raises(
+        AnyAPIError, match="at least one of query, category, or platform"
+    ):
+        client.search(limit=5)
+    assert recorder.requests == []
+
+
 def test_search_drops_safe_additive_result_and_envelope_fields() -> None:
     body = discovery_search()
     results = cast("list[dict[str, object]]", body["results"])
diff --git a/packages/typescript/src/core/client.ts b/packages/typescript/src/core/client.ts
index b0b961c..2417dce 100644
--- a/packages/typescript/src/core/client.ts
+++ b/packages/typescript/src/core/client.ts
@@ -538,9 +538,22 @@ export class AnyAPI implements ClientCore {
     return mapCatalogList(raw);
   }
 
-  /** Ranked catalog search. GET /catalog/search. Browse never accepts a query. */
+  /**
+   * Ranked catalog search. GET /catalog/search. Browse never accepts a query.
+   *
+   * The gateway needs at least one of query, category or platform, in any
+   * combination, so a scope with no query at all is a valid search. An absent or
+   * empty query omits `q` entirely, because an empty `q` is a different request.
+   */
   async search(options: SearchOptions): Promise<CatalogSearchResults> {
-    const search = new URLSearchParams({ q: options.query });
+    if (!options.query && !options.category && !options.platform) {
+      throw new AnyAPIError(
+        "search needs at least one of query, category, or platform",
+        0,
+      );
+    }
+    const search = new URLSearchParams();
+    if (options.query) search.set("q", options.query);
     if (options.category) search.set("category", options.category);
     if (options.platform) search.set("platform", options.platform);
     if (options.limit !== undefined) search.set("limit", String(options.limit));
diff --git a/packages/typescript/src/core/types.ts b/packages/typescript/src/core/types.ts
index d94247d..237c00a 100644
--- a/packages/typescript/src/core/types.ts
+++ b/packages/typescript/src/core/types.ts
@@ -307,8 +307,13 @@ export interface CatalogEntry {
   latency?: DiscoveryLatency | null;
 }
 
+/**
+ * Ranked catalog search accepts any non-empty combination of query, category and
+ * platform, so a scope with no query at all ("every reddit API") is expressible.
+ * At least one of the three is required; see `AnyAPI.search`.
+ */
 export interface SearchOptions {
-  query: string;
+  query?: string;
   category?: string;
   platform?: string;
   limit?: number;
diff --git a/packages/typescript/tests/account.test.ts b/packages/typescript/tests/account.test.ts
index cc76306..fd48cc6 100644
--- a/packages/typescript/tests/account.test.ts
+++ b/packages/typescript/tests/account.test.ts
@@ -299,6 +299,36 @@ describe("search", () => {
     });
   });
 
+  it("searches a scope with no query and omits q entirely", async () => {
+    const body = clone(golden.rest.search);
+    const { fetch, calls } = mockFetch([{ body }]);
+    const client = new AnyAPI({ apiKey: "k", fetch });
+    await client.search({ platform: "reddit" });
+    const url = new URL(calls[0]!.url);
+    expect(url.pathname).toBe("/catalog/search");
+    expect(url.searchParams.has("q")).toBe(false);
+    expect(Object.fromEntries(url.searchParams)).toEqual({
+      platform: "reddit",
+    });
+  });
+
+  it("omits an empty query rather than sending q=", async () => {
+    const body = clone(golden.rest.search);
+    const { fetch, calls } = mockFetch([{ body }]);
+    const client = new AnyAPI({ apiKey: "k", fetch });
+    await client.search({ query: "", category: "social" });
+    expect(new URL(calls[0]!.url).searchParams.has("q")).toBe(false);
+  });
+
+  it("rejects a search naming none of query, category, or platform", async () => {
+    const { fetch, calls } = mockFetch([]);
+    const client = new AnyAPI({ apiKey: "k", fetch });
+    await expect(client.search({ limit: 5 })).rejects.toThrow(
+      "search needs at least one of query, category, or platform",
+    );
+    expect(calls).toHaveLength(0);
+  });
+
   it("rejects an upstream provider identity", async () => {
     const body = clone(golden.rest.search);
     body.results[0]!.provider = "upstream";
diff --git a/scripts/live-discovery-python.py b/scripts/live-discovery-python.py
index 08d4d4c..4b4ff36 100644
--- a/scripts/live-discovery-python.py
+++ b/scripts/live-discovery-python.py
@@ -59,6 +59,11 @@ def handler(request: httpx.Request) -> httpx.Response:
             search = client.search(query="web", limit=1)
             assert search.results, "search is empty"
 
+            # A scope with no query at all is a complete search: the gateway takes
+            # any non-empty combination of q, category and platform.
+            scoped = client.search(platform="reddit", limit=3)
+            assert scoped.results, "scope-only search is empty"
+
             detail = client.describe(eligible.slug)
             assert detail.slug == eligible.slug, "detail slug does not match"
             assert detail.input_schema is not None, "detail input schema is missing"
diff --git a/scripts/live-discovery-ts.mjs b/scripts/live-discovery-ts.mjs
index 8ec4415..c5a3210 100644
--- a/scripts/live-discovery-ts.mjs
+++ b/scripts/live-discovery-ts.mjs
@@ -66,6 +66,11 @@ assert(eligible, "catalog has no try-eligible SKU");
 const search = await client.search({ query: "web", limit: 1 });
 assert(search.results.length > 0, "search is empty");
 
+// A scope with no query at all is a complete search: the gateway takes any
+// non-empty combination of q, category and platform.
+const scoped = await client.search({ platform: "reddit", limit: 3 });
+assert(scoped.results.length > 0, "scope-only search is empty");
+
 const detail = await client.describe(eligible.slug);
 assert(detail.slug === eligible.slug, "detail slug does not match");
 assert(detail.inputSchema, "detail input schema is missing");