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

# Changes to signal a workflow

`POST /api/v1/workflow/signal`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 6 of 69 revisions.

- **2026-07-17** `fe9c7606824c`: 2 info
- **2023-07-05** `b341064dfc4b`: 1 warning
- **2023-04-15** `86630172940f`: 1 warning, 3 info
- **2023-01-12** `f7d20041860e`: 3 warning
- **2022-10-14** `25958850787b`: 1 breaking, 1 warning
- **2022-10-09** `0dfb1207bf6c`: 2 breaking

## Changes

- **2026-07-17** `fe9c7606824c`: 2 info
  - added the new optional request property `signalValue/extPath`
  - added the new optional request property `signalValue/extStoreId`
- **2023-07-05** `b341064dfc4b`: 1 warning
  - added the new `LONG_POLL_TIME_OUT_SUB_STATUS` enum value to the `subStatus` response property for the response status `400`
- **2023-04-15** `86630172940f`: 1 warning, 3 info
  - added the new `WORKER_API_ERROR` enum value to the `subStatus` response property for the response status `400`
  - added the optional property `originalWorkerErrorDetail` to the response with the `400` status
  - added the optional property `originalWorkerErrorStatus` to the response with the `400` status
  - added the optional property `originalWorkerErrorType` to the response with the `400` status
- **2023-01-12** `f7d20041860e`: 3 warning
  - added the new `UNCATEGORIZED_SUB_STATUS` enum value to the `subStatus` response property for the response status `400`
  - added the new `WORKFLOW_ALREADY_STARTED_SUB_STATUS` enum value to the `subStatus` response property for the response status `400`
  - added the new `WORKFLOW_NOT_EXISTS_SUB_STATUS` enum value to the `subStatus` response property for the response status `400`
- **2022-10-14** `25958850787b`: 1 breaking, 1 warning
  - added the new required request property `signalChannelName`
  - removed the request property `signalName`
- **2022-10-09** `0dfb1207bf6c`: 2 breaking
  - removed the enum value `JSON` of the request property `signalValue/encoding`
  - removed the media type `application/json` for the response with the status `200`

---

[Operation](https://skmtc.dev/indeedeng/apis/workflow-apis/docs/api/v1/workflow/signal/post.md) - [API](https://skmtc.dev/indeedeng/apis/workflow-apis.md) - [Page](https://skmtc.dev/indeedeng/apis/workflow-apis/changes/api/v1/workflow/signal/post)