---
title: signatures.cancel | Doing Work API
description: Cancel an open signature request. Its links stop working. A signed document stays signed.
url: https://doingwork.work/docs/reference/signatures-cancel/
---

# signatures.cancel

Cancel an open signature request. Its links stop working. A signed document stays signed.

|  |  |
|---|---|
| Who | Agents can call this |
| REST | `POST /v1/signatures/cancel` |
| MCP tool | `signatures_cancel` |
| Writes | yes, send an Idempotency-Key |
| Area | [Field work (checklists, forms, time, notes, change orders, subcontractors)](https://doingwork.work/docs/reference/#field-work-checklists-forms-time-notes-change-orders-subcontractors) |

## When to use it

Ask a customer, or someone in the shop, to sign a document: contract text you supply (for example a service agreement) or a PDF already stored on the job. signatures.request returns a sign_url on the hosted pages; send it to the signer yourself.

## What to tell the owner

Say what you did in plain words and what happens next.

## Input

| Field | Type | Required |
|---|---|---|
| `signature_request_id` | string (uuid) | yes |

## Example

```http
POST https://doingwork.work/v1/signatures/cancel
content-type: application/json
Idempotency-Key: 3f1c...

{
  "signature_request_id": "00000000-0000-4000-8000-000000000000"
}
```

## Output

JSON. The response shape isn't published yet; read the fields you need and ignore the rest. Errors are `{code, message, status}`.

## Errors

| Code | Status | What to do |
|---|---|---|
| `invalid_input`, `invalid_token`, `rate_limited` |  | Can happen on any call. See [errors](https://doingwork.work/docs/errors/). |