---
title: "signal a workflow"
method: POST
path: "/api/v1/workflow/publishToInternalChannel"
---

# signal a workflow

`POST /api/v1/workflow/publishToInternalChannel`

## Request body

- PublishToInternalChannelRequest
  - `workflowId` string, required
  - `workflowRunId` string
  - `messages` InterStateChannelPublishing[]
    - `channelName` string, required
    - `value` EncodedObject
      - `extStoreId` string
      - `extPath` string
      - `encoding` string
      - `data` string

## Response `200`

successful operation

## Other responses

- `400` — Invalid input

## Changes

> 50 revisions in range; 1 could not be searched.

- **2025-07-30** `53fb7950c446` — 1 info
  - endpoint added
- **2022-12-18** `a325ec23e79c` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/indeedeng/apis/workflow-apis/changes/api/v1/workflow/publishToInternalChannel/post.md)

---

[API](https://skmtc.dev/indeedeng/apis/workflow-apis.md) · [All operations](https://skmtc.dev/indeedeng/apis/workflow-apis/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/indeedeng/workflow-apis/revisions/fe9c7606824c/schema)