curl -X POST 'https://api.anthropic.com/v1/dreams/dream-id/cancel?beta=true' \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H 'anthropic-version: 2023-06-01'

# POST /v1/dreams/{dream_id}/cancel?beta=true (Claude API)
Base URL: https://api.anthropic.com
Auth: x-api-key; Anthropic API key; required.
Status: Beta.
Last verified: 2026-10-20

> Cancel a Dream

## Critical Gotchas
* Authentication uses the `x-api-key` header and requests also require an `anthropic-version` header.
* The official OpenAPI URL is discovered from the SDK repository manifest and must remain under Anthropic's trusted Stainless storage prefix.

## cURL
curl -X POST 'https://api.anthropic.com/v1/dreams/dream-id/cancel?beta=true' \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H 'anthropic-version: 2023-06-01'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| dream_id | path | string | Yes | Path parameter dream_id |

## Response example
{"type":"dream","id":"string"}

---
Need an API key? Get one at https://console.anthropic.com/settings/keys

POST

POST /v1/dreams/{dream_id}/cancel?beta=true — Claude API

Beta

Anthropic API key (required); https://api.anthropic.com

Claude API

Cancel a Dream

Base URL: https://api.anthropic.com
Auth: x-api-key: <ANTHROPIC_API_KEY>
Last verified: 2026-10-20 · upstream hash matched

Actions Try in browser→

Agents: curl -H "Accept: text/markdown" this URL
→ 162 tokens · Vary: Accept

Critical gotchas

Authentication uses the x-api-key header and requests also require an anthropic-version header.

The official OpenAPI URL is discovered from the SDK repository manifest and must remain under Anthropic's trusted Stainless storage prefix.

cURL

curl -X POST 'https://api.anthropic.com/v1/dreams/dream-id/cancel?beta=true' \  -H "x-api-key: $ANTHROPIC_API_KEY" \  -H 'anthropic-version: 2023-06-01'

Parameters

Name	In	Type	Required	Description
dream_id	path	string	Yes	Path parameter dream_id

Response 200 OK

{
  "type": "dream",
  "id": "string",
  "inputs": [
    {
      "type": "memory_store",
      "memory_store_id": "string"
    }
  ],
  "outputs": [
    {
      "type": "memory_store",
      "memory_store_id": "string"
    }
  ],
  "status": "pending",
  "created_at": "2026-09-03T00:00:00Z",
  "ended_at": "2026-09-03T00:00:00Z",
  "archived_at": "2026-09-03T00:00:00Z",
  "error": {
    "type": "string",
    "message": "string"
  },
  "model": {
    "id": "string",
    "speed": "standard"
  },
  "instructions": "string",
  "session_id": "string",
  "usage": {
    "input_tokens": 0,
    "output_tokens": 0,
    "cache_read_input_tokens": 0,
    "cache_creation_input_tokens": 0
  },
  "output_behavior": {
    "type": "create_new"
  }
}

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