---
title: "Pause a gradual send"
method: POST
path: "/v1/sends/{sendId}/pause"
tags: ["Emails"]
---

# Pause a gradual send

`POST /v1/sends/{sendId}/pause`

Manually pauses an in-flight GRADUAL (domain-warmup) send. The delivering workflow parks the current day’s remaining tranche at its next gate poll (≤120s) and holds until `POST /v1/sends/{sendId}/resume` (or a cancel). A send that is not a `sending` gradual send returns `409 SEND_NOT_PAUSABLE`. Brand-scoped: an unknown / cross-brand `sendId` is `404`.

## Path parameters

- `sendId` string, required — Send id returned by `POST /v1/sends`.

## Headers

- `Idempotency-Key` string

## Response `200`

The send is paused.

- SendPauseResponse
  - `sendId` string, required
  - `status` 'paused', required

## Other responses

- `401` — The API key was missing, invalid, or revoked.
- `403` — The caller does not have the required `sends` permission.
- `404` — Send not found in the API-key brand. Cross-brand ids intentionally surface as 404 (never 403) so the API does not leak cross-brand existence.
- `409` — The send is not a delivering gradual send (not gradual, or not `sending`).
- `429` — The request hit the rolling rate limit window.
- `500` — Unexpected internal error.

---

[API](https://skmtc.net/brew/apis/brew-public-api-v1.md) · [All operations](https://skmtc.net/brew/apis/brew-public-api-v1/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/brew/brew-public-api-v1/versions/db96cfedc6c5/schema)