From b4e4ce8a56859a87137349e5f97ede2c8acaad25 Mon Sep 17 00:00:00 2001
From: "stainless-app[bot]"
 <142633134+stainless-app[bot]@users.noreply.github.com>
Date: Fri, 20 Feb 2026 07:26:59 +0000
Subject: [PATCH 1/3] chore: update mock server docs

---
 CONTRIBUTING.md | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1a02fdd..e40b567 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -88,8 +88,7 @@ $ pip install ./path-to-wheel-file.whl
 Most tests require you to [set up a mock server](https://github.com/stoplightio/prism) against the OpenAPI spec to run the tests.
 
 ```sh
-# you will need npm installed
-$ npx prism mock path/to/your/openapi.yml
+$ ./scripts/mock
 ```
 
 ```sh

From 3eddd677b69f387149336e11abe71a6143290ac4 Mon Sep 17 00:00:00 2001
From: "stainless-app[bot]"
 <142633134+stainless-app[bot]@users.noreply.github.com>
Date: Fri, 20 Feb 2026 10:20:04 +0000
Subject: [PATCH 2/3] feat(api): add tenantId to send

---
 .stats.yml                                    |  4 +-
 src/ark/resources/emails.py                   | 60 +++++++++++++++++++
 src/ark/types/email_list_response.py          |  3 +
 .../email_retrieve_deliveries_response.py     |  3 +
 src/ark/types/email_retrieve_response.py      |  3 +
 src/ark/types/email_retry_response.py         |  5 ++
 src/ark/types/email_send_batch_params.py      | 11 ++++
 src/ark/types/email_send_batch_response.py    |  5 ++
 src/ark/types/email_send_params.py            | 11 ++++
 src/ark/types/email_send_raw_params.py        | 11 ++++
 src/ark/types/email_send_raw_response.py      |  3 +
 src/ark/types/email_send_response.py          |  3 +
 tests/api_resources/test_emails.py            |  6 ++
 13 files changed, 126 insertions(+), 2 deletions(-)

diff --git a/.stats.yml b/.stats.yml
index c8ee129..e530c9b 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 58
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/ark%2Fark-98a90852ffca49f4e26c613afff433b17023ee1f81f38ad38a5dad60a0d09881.yml
-openapi_spec_hash: c6fd865dd6995df15cf9e6ada2ae791e
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/ark%2Fark-06c3025bf12b191c3906b28173c9b359e24481dd2839dbf3e6dd0b80c1de3fd6.yml
+openapi_spec_hash: d8f8fb1f78579997b6381d64cba4e826
 config_hash: b70b11b10fc614f91f1c6f028b40780f
diff --git a/src/ark/resources/emails.py b/src/ark/resources/emails.py
index 77631ce..508b5e9 100644
--- a/src/ark/resources/emails.py
+++ b/src/ark/resources/emails.py
@@ -317,6 +317,7 @@ def send(
         metadata: Optional[Dict[str, str]] | Omit = omit,
         reply_to: Optional[str] | Omit = omit,
         tag: Optional[str] | Omit = omit,
+        tenant_id: Optional[str] | Omit = omit,
         text: Optional[str] | Omit = omit,
         idempotency_key: str | Omit = omit,
         # Use the following arguments if you need to pass additional parameters to the API that aren't available via kwargs.
@@ -396,6 +397,14 @@ def send(
 
           tag: Tag for categorization and filtering (accepts null)
 
+          tenant_id: The tenant ID to send this email from. Determines which tenant's configuration
+              (domains, webhooks, tracking) is used.
+
+              - If your API key is scoped to a specific tenant, this must match that tenant or
+                be omitted.
+              - If your API key is org-level, specify the tenant to send from.
+              - If omitted, the organization's default tenant is used.
+
           text: Plain text body (accepts null, auto-generated from HTML if not provided).
               Maximum 5MB (5,242,880 characters).
 
@@ -423,6 +432,7 @@ def send(
                     "metadata": metadata,
                     "reply_to": reply_to,
                     "tag": tag,
+                    "tenant_id": tenant_id,
                     "text": text,
                 },
                 email_send_params.EmailSendParams,
@@ -438,6 +448,7 @@ def send_batch(
         *,
         emails: Iterable[email_send_batch_params.Email],
         from_: str,
+        tenant_id: Optional[str] | Omit = omit,
         idempotency_key: str | Omit = omit,
         # Use the following arguments if you need to pass additional parameters to the API that aren't available via kwargs.
         # The extra values given here take precedence over values defined on the client or passed to this method.
@@ -459,6 +470,14 @@ def send_batch(
         Args:
           from_: Sender email for all messages
 
+          tenant_id: The tenant ID to send this batch from. Determines which tenant's configuration
+              (domains, webhooks, tracking) is used.
+
+              - If your API key is scoped to a specific tenant, this must match that tenant or
+                be omitted.
+              - If your API key is org-level, specify the tenant to send from.
+              - If omitted, the organization's default tenant is used.
+
           extra_headers: Send extra headers
 
           extra_query: Add additional query parameters to the request
@@ -474,6 +493,7 @@ def send_batch(
                 {
                     "emails": emails,
                     "from_": from_,
+                    "tenant_id": tenant_id,
                 },
                 email_send_batch_params.EmailSendBatchParams,
             ),
@@ -490,6 +510,7 @@ def send_raw(
         raw_message: str,
         to: SequenceNotStr[str],
         bounce: Optional[bool] | Omit = omit,
+        tenant_id: Optional[str] | Omit = omit,
         # Use the following arguments if you need to pass additional parameters to the API that aren't available via kwargs.
         # The extra values given here take precedence over values defined on the client or passed to this method.
         extra_headers: Headers | None = None,
@@ -527,6 +548,14 @@ def send_raw(
 
           bounce: Whether this is a bounce message (accepts null)
 
+          tenant_id: The tenant ID to send this email from. Determines which tenant's configuration
+              (domains, webhooks, tracking) is used.
+
+              - If your API key is scoped to a specific tenant, this must match that tenant or
+                be omitted.
+              - If your API key is org-level, specify the tenant to send from.
+              - If omitted, the organization's default tenant is used.
+
           extra_headers: Send extra headers
 
           extra_query: Add additional query parameters to the request
@@ -543,6 +572,7 @@ def send_raw(
                     "raw_message": raw_message,
                     "to": to,
                     "bounce": bounce,
+                    "tenant_id": tenant_id,
                 },
                 email_send_raw_params.EmailSendRawParams,
             ),
@@ -833,6 +863,7 @@ async def send(
         metadata: Optional[Dict[str, str]] | Omit = omit,
         reply_to: Optional[str] | Omit = omit,
         tag: Optional[str] | Omit = omit,
+        tenant_id: Optional[str] | Omit = omit,
         text: Optional[str] | Omit = omit,
         idempotency_key: str | Omit = omit,
         # Use the following arguments if you need to pass additional parameters to the API that aren't available via kwargs.
@@ -912,6 +943,14 @@ async def send(
 
           tag: Tag for categorization and filtering (accepts null)
 
+          tenant_id: The tenant ID to send this email from. Determines which tenant's configuration
+              (domains, webhooks, tracking) is used.
+
+              - If your API key is scoped to a specific tenant, this must match that tenant or
+                be omitted.
+              - If your API key is org-level, specify the tenant to send from.
+              - If omitted, the organization's default tenant is used.
+
           text: Plain text body (accepts null, auto-generated from HTML if not provided).
               Maximum 5MB (5,242,880 characters).
 
@@ -939,6 +978,7 @@ async def send(
                     "metadata": metadata,
                     "reply_to": reply_to,
                     "tag": tag,
+                    "tenant_id": tenant_id,
                     "text": text,
                 },
                 email_send_params.EmailSendParams,
@@ -954,6 +994,7 @@ async def send_batch(
         *,
         emails: Iterable[email_send_batch_params.Email],
         from_: str,
+        tenant_id: Optional[str] | Omit = omit,
         idempotency_key: str | Omit = omit,
         # Use the following arguments if you need to pass additional parameters to the API that aren't available via kwargs.
         # The extra values given here take precedence over values defined on the client or passed to this method.
@@ -975,6 +1016,14 @@ async def send_batch(
         Args:
           from_: Sender email for all messages
 
+          tenant_id: The tenant ID to send this batch from. Determines which tenant's configuration
+              (domains, webhooks, tracking) is used.
+
+              - If your API key is scoped to a specific tenant, this must match that tenant or
+                be omitted.
+              - If your API key is org-level, specify the tenant to send from.
+              - If omitted, the organization's default tenant is used.
+
           extra_headers: Send extra headers
 
           extra_query: Add additional query parameters to the request
@@ -990,6 +1039,7 @@ async def send_batch(
                 {
                     "emails": emails,
                     "from_": from_,
+                    "tenant_id": tenant_id,
                 },
                 email_send_batch_params.EmailSendBatchParams,
             ),
@@ -1006,6 +1056,7 @@ async def send_raw(
         raw_message: str,
         to: SequenceNotStr[str],
         bounce: Optional[bool] | Omit = omit,
+        tenant_id: Optional[str] | Omit = omit,
         # Use the following arguments if you need to pass additional parameters to the API that aren't available via kwargs.
         # The extra values given here take precedence over values defined on the client or passed to this method.
         extra_headers: Headers | None = None,
@@ -1043,6 +1094,14 @@ async def send_raw(
 
           bounce: Whether this is a bounce message (accepts null)
 
+          tenant_id: The tenant ID to send this email from. Determines which tenant's configuration
+              (domains, webhooks, tracking) is used.
+
+              - If your API key is scoped to a specific tenant, this must match that tenant or
+                be omitted.
+              - If your API key is org-level, specify the tenant to send from.
+              - If omitted, the organization's default tenant is used.
+
           extra_headers: Send extra headers
 
           extra_query: Add additional query parameters to the request
@@ -1059,6 +1118,7 @@ async def send_raw(
                     "raw_message": raw_message,
                     "to": to,
                     "bounce": bounce,
+                    "tenant_id": tenant_id,
                 },
                 email_send_raw_params.EmailSendRawParams,
             ),
diff --git a/src/ark/types/email_list_response.py b/src/ark/types/email_list_response.py
index dce7d39..21bd18e 100644
--- a/src/ark/types/email_list_response.py
+++ b/src/ark/types/email_list_response.py
@@ -30,6 +30,9 @@ class EmailListResponse(BaseModel):
 
     subject: str
 
+    tenant_id: str = FieldInfo(alias="tenantId")
+    """The tenant ID this email belongs to"""
+
     timestamp: float
 
     timestamp_iso: datetime = FieldInfo(alias="timestampIso")
diff --git a/src/ark/types/email_retrieve_deliveries_response.py b/src/ark/types/email_retrieve_deliveries_response.py
index a923d98..1f3c1bc 100644
--- a/src/ark/types/email_retrieve_deliveries_response.py
+++ b/src/ark/types/email_retrieve_deliveries_response.py
@@ -170,6 +170,9 @@ class Data(BaseModel):
     - `bounced` - Bounced by recipient server
     """
 
+    tenant_id: str = FieldInfo(alias="tenantId")
+    """The tenant ID this email belongs to"""
+
 
 class EmailRetrieveDeliveriesResponse(BaseModel):
     data: Data
diff --git a/src/ark/types/email_retrieve_response.py b/src/ark/types/email_retrieve_response.py
index d9bc54c..c0de6b1 100644
--- a/src/ark/types/email_retrieve_response.py
+++ b/src/ark/types/email_retrieve_response.py
@@ -179,6 +179,9 @@ class Data(BaseModel):
     subject: str
     """Email subject line"""
 
+    tenant_id: str = FieldInfo(alias="tenantId")
+    """The tenant ID this email belongs to"""
+
     timestamp: float
     """Unix timestamp when the email was sent"""
 
diff --git a/src/ark/types/email_retry_response.py b/src/ark/types/email_retry_response.py
index f63cc99..fe5d8ce 100644
--- a/src/ark/types/email_retry_response.py
+++ b/src/ark/types/email_retry_response.py
@@ -2,6 +2,8 @@
 
 from typing_extensions import Literal
 
+from pydantic import Field as FieldInfo
+
 from .._models import BaseModel
 from .shared.api_meta import APIMeta
 
@@ -14,6 +16,9 @@ class Data(BaseModel):
 
     message: str
 
+    tenant_id: str = FieldInfo(alias="tenantId")
+    """The tenant ID this email belongs to"""
+
 
 class EmailRetryResponse(BaseModel):
     data: Data
diff --git a/src/ark/types/email_send_batch_params.py b/src/ark/types/email_send_batch_params.py
index ba54d41..38c9caf 100644
--- a/src/ark/types/email_send_batch_params.py
+++ b/src/ark/types/email_send_batch_params.py
@@ -17,6 +17,17 @@ class EmailSendBatchParams(TypedDict, total=False):
     from_: Required[Annotated[str, PropertyInfo(alias="from")]]
     """Sender email for all messages"""
 
+    tenant_id: Annotated[Optional[str], PropertyInfo(alias="tenantId")]
+    """The tenant ID to send this batch from.
+
+    Determines which tenant's configuration (domains, webhooks, tracking) is used.
+
+    - If your API key is scoped to a specific tenant, this must match that tenant or
+      be omitted.
+    - If your API key is org-level, specify the tenant to send from.
+    - If omitted, the organization's default tenant is used.
+    """
+
     idempotency_key: Annotated[str, PropertyInfo(alias="Idempotency-Key")]
 
 
diff --git a/src/ark/types/email_send_batch_response.py b/src/ark/types/email_send_batch_response.py
index d32e3fc..06fe526 100644
--- a/src/ark/types/email_send_batch_response.py
+++ b/src/ark/types/email_send_batch_response.py
@@ -3,6 +3,8 @@
 from typing import Dict, Optional
 from typing_extensions import Literal
 
+from pydantic import Field as FieldInfo
+
 from .._models import BaseModel
 from .shared.api_meta import APIMeta
 
@@ -24,6 +26,9 @@ class Data(BaseModel):
     messages: Dict[str, DataMessages]
     """Map of recipient email to message info"""
 
+    tenant_id: str = FieldInfo(alias="tenantId")
+    """The tenant ID this batch was sent from"""
+
     total: int
     """Total emails in the batch"""
 
diff --git a/src/ark/types/email_send_params.py b/src/ark/types/email_send_params.py
index 0363339..af3e94f 100644
--- a/src/ark/types/email_send_params.py
+++ b/src/ark/types/email_send_params.py
@@ -79,6 +79,17 @@ class EmailSendParams(TypedDict, total=False):
     tag: Optional[str]
     """Tag for categorization and filtering (accepts null)"""
 
+    tenant_id: Annotated[Optional[str], PropertyInfo(alias="tenantId")]
+    """The tenant ID to send this email from.
+
+    Determines which tenant's configuration (domains, webhooks, tracking) is used.
+
+    - If your API key is scoped to a specific tenant, this must match that tenant or
+      be omitted.
+    - If your API key is org-level, specify the tenant to send from.
+    - If omitted, the organization's default tenant is used.
+    """
+
     text: Optional[str]
     """
     Plain text body (accepts null, auto-generated from HTML if not provided).
diff --git a/src/ark/types/email_send_raw_params.py b/src/ark/types/email_send_raw_params.py
index d957f74..56c038b 100644
--- a/src/ark/types/email_send_raw_params.py
+++ b/src/ark/types/email_send_raw_params.py
@@ -37,3 +37,14 @@ class EmailSendRawParams(TypedDict, total=False):
 
     bounce: Optional[bool]
     """Whether this is a bounce message (accepts null)"""
+
+    tenant_id: Annotated[Optional[str], PropertyInfo(alias="tenantId")]
+    """The tenant ID to send this email from.
+
+    Determines which tenant's configuration (domains, webhooks, tracking) is used.
+
+    - If your API key is scoped to a specific tenant, this must match that tenant or
+      be omitted.
+    - If your API key is org-level, specify the tenant to send from.
+    - If omitted, the organization's default tenant is used.
+    """
diff --git a/src/ark/types/email_send_raw_response.py b/src/ark/types/email_send_raw_response.py
index 46e7c96..80a61fb 100644
--- a/src/ark/types/email_send_raw_response.py
+++ b/src/ark/types/email_send_raw_response.py
@@ -18,6 +18,9 @@ class Data(BaseModel):
     status: Literal["pending", "sent"]
     """Current delivery status"""
 
+    tenant_id: str = FieldInfo(alias="tenantId")
+    """The tenant ID this email was sent from"""
+
     to: List[str]
     """List of recipient addresses"""
 
diff --git a/src/ark/types/email_send_response.py b/src/ark/types/email_send_response.py
index cb7d814..7c54d65 100644
--- a/src/ark/types/email_send_response.py
+++ b/src/ark/types/email_send_response.py
@@ -18,6 +18,9 @@ class Data(BaseModel):
     status: Literal["pending", "sent"]
     """Current delivery status"""
 
+    tenant_id: str = FieldInfo(alias="tenantId")
+    """The tenant ID this email was sent from"""
+
     to: List[str]
     """List of recipient addresses"""
 
diff --git a/tests/api_resources/test_emails.py b/tests/api_resources/test_emails.py
index 0e37b72..daa4744 100644
--- a/tests/api_resources/test_emails.py
+++ b/tests/api_resources/test_emails.py
@@ -219,6 +219,7 @@ def test_method_send_with_all_params(self, client: Ark) -> None:
             },
             reply_to="dev@stainless.com",
             tag="tag",
+            tenant_id="cm6abc123def456",
             text="text",
             idempotency_key="user_123_order_456",
         )
@@ -299,6 +300,7 @@ def test_method_send_batch_with_all_params(self, client: Ark) -> None:
                 },
             ],
             from_="notifications@myapp.com",
+            tenant_id="cm6abc123def456",
             idempotency_key="user_123_order_456",
         )
         assert_matches_type(EmailSendBatchResponse, email, path=["response"])
@@ -363,6 +365,7 @@ def test_method_send_raw_with_all_params(self, client: Ark) -> None:
             raw_message="x",
             to=["user@example.com"],
             bounce=True,
+            tenant_id="cm6abc123def456",
         )
         assert_matches_type(EmailSendRawResponse, email, path=["response"])
 
@@ -593,6 +596,7 @@ async def test_method_send_with_all_params(self, async_client: AsyncArk) -> None
             },
             reply_to="dev@stainless.com",
             tag="tag",
+            tenant_id="cm6abc123def456",
             text="text",
             idempotency_key="user_123_order_456",
         )
@@ -673,6 +677,7 @@ async def test_method_send_batch_with_all_params(self, async_client: AsyncArk) -
                 },
             ],
             from_="notifications@myapp.com",
+            tenant_id="cm6abc123def456",
             idempotency_key="user_123_order_456",
         )
         assert_matches_type(EmailSendBatchResponse, email, path=["response"])
@@ -737,6 +742,7 @@ async def test_method_send_raw_with_all_params(self, async_client: AsyncArk) ->
             raw_message="x",
             to=["user@example.com"],
             bounce=True,
+            tenant_id="cm6abc123def456",
         )
         assert_matches_type(EmailSendRawResponse, email, path=["response"])
 

From b56adb49f3f1ac7cae4bcec94ce92826abc8c96c Mon Sep 17 00:00:00 2001
From: "stainless-app[bot]"
 <142633134+stainless-app[bot]@users.noreply.github.com>
Date: Fri, 20 Feb 2026 10:20:44 +0000
Subject: [PATCH 3/3] release: 0.19.0

---
 .release-please-manifest.json |  2 +-
 CHANGELOG.md                  | 13 +++++++++++++
 pyproject.toml                |  2 +-
 src/ark/_version.py           |  2 +-
 4 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index d661066..e756293 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.18.1"
+  ".": "0.19.0"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a755aaa..2a4443c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Changelog
 
+## 0.19.0 (2026-02-20)
+
+Full Changelog: [v0.18.1...v0.19.0](https://github.com/ArkHQ-io/ark-python/compare/v0.18.1...v0.19.0)
+
+### Features
+
+* **api:** add tenantId to send ([3eddd67](https://github.com/ArkHQ-io/ark-python/commit/3eddd677b69f387149336e11abe71a6143290ac4))
+
+
+### Chores
+
+* update mock server docs ([b4e4ce8](https://github.com/ArkHQ-io/ark-python/commit/b4e4ce8a56859a87137349e5f97ede2c8acaad25))
+
 ## 0.18.1 (2026-02-18)
 
 Full Changelog: [v0.18.0...v0.18.1](https://github.com/ArkHQ-io/ark-python/compare/v0.18.0...v0.18.1)
diff --git a/pyproject.toml b/pyproject.toml
index 0adad94..d762cba 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "ark-email"
-version = "0.18.1"
+version = "0.19.0"
 description = "The official Python library for the ark API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/ark/_version.py b/src/ark/_version.py
index 39f8f2d..a626377 100644
--- a/src/ark/_version.py
+++ b/src/ark/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "ark"
-__version__ = "0.18.1"  # x-release-please-version
+__version__ = "0.19.0"  # x-release-please-version