Cancel a Dream

POST /v1/dreams/\{dream_id\}/cancel

Cancel a Dream

Path parameters

• dream_id: string

Headers

• "anthropic-beta": optional array of AnthropicBeta

  Optional header to specify the beta version(s) you want to use.

  • string

  • "message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 42 more

    • "message-batches-2024-09-24"

    • "prompt-caching-2024-07-31"

    • "computer-use-2024-10-22"

    • "computer-use-2025-01-24"

    • "pdfs-2024-09-25"

    • "token-counting-2024-11-01"

    • "token-efficient-tools-2025-02-19"

    • "output-128k-2025-02-19"

    • "files-api-2025-04-14"

    • "mcp-client-2025-04-04"

    • "mcp-client-2025-11-20"

    • "dev-full-thinking-2025-05-14"

    • "interleaved-thinking-2025-05-14"

    • "code-execution-2025-05-22"

    • "extended-cache-ttl-2025-04-11"

    • "context-1m-2025-08-07"

    • "context-management-2025-06-27"

    • "model-context-window-exceeded-2025-08-26"

    • "skills-2025-10-02"

    • "fast-mode-2026-02-01"

    • "output-300k-2026-03-24"

    • "user-profiles-2026-03-24"

    • "user-profiles-2026-08-18"

    • "user-profiles-2026-09-04"

    • "advisor-tool-2026-03-01"

    • "managed-agents-2026-04-01"

    • "cache-diagnosis-2026-04-07"

    • "dreaming-2026-04-21"

    • "thinking-token-count-2026-05-13"

    • "server-side-fallback-2026-06-01"

    • "server-side-fallback-2026-07-01"

    • "fallback-credit-2026-06-01"

    • "fallback-credit-2026-07-01"

    • "agent-memory-2026-07-22"

    • "mid-conversation-tool-changes-2026-07-01"

    • "compact-2026-01-12"

    • "computer-use-2025-11-24"

    • "mcp-tunnels-2026-06-22"

    • "structured-outputs-2025-11-13"

    • "task-budgets-2026-03-13"

    • "thinking-display-updates-2026-08-18"

    • "ce-user-management-2026-07-13"

    • "mid-conversation-output-config-2026-07-01"

    • "thinking-binding-controls-2026-08-01"

    • "mid-conversation-system-clear-at-2026-08-21"

• "anthropic-workspace-id": optional string

Returns

• BetaDream object

  An asynchronous memory-consolidation job that reads a memory store plus a set of session transcripts and writes consolidated memories into an output memory store — a new store by default, or an existing store chosen via output_behavior. The Dreams API is in research preview: the request and response shapes are volatile and may change without the deprecation period that applies to generally-available endpoints.

  • type: "dream"

  • id: string

  • archived_at: string or null

    A timestamp in RFC 3339 format

    format: date-time

  • created_at: string

    A timestamp in RFC 3339 format

    format: date-time

  • ended_at: string or null

    A timestamp in RFC 3339 format

    format: date-time

  • error: BetaDreamError or null

    Failure detail for a Dream whose status is failed.

    • type: string

    • message: string

  • inputs: array of BetaDreamInput

    • BetaDreamMemoryStoreInput object

      An input memory store the dream reads from. The dream never mutates this store unless it is also the destination: with output_behavior {type: "update_existing"} the job consolidates this store in place.

      • type: "memory_store"

      • memory_store_id: string

        minLength: 1

    • BetaDreamSessionsInput object

      Input session transcripts the dream reads.

      • type: "sessions"

      • session_ids: array of string

  • instructions: string or null

  • model: BetaDreamModelConfig

    Model identifier and configuration applied to every pipeline stage. Same wire shape as the Agents API ModelConfig.

    • id: string

      Model identifier, e.g. "claude-opus-5". 1-256 characters.

      minLength: 1, maxLength: 256

    • speed: optional "standard" or "fast"

      Inference speed mode. fast provides significantly faster output token generation at premium pricing. Not all models support fast; invalid combinations are rejected at create time.

      • "standard"

      • "fast"

  • output_behavior: BetaOutputBehavior

    The default destination: the job creates a new output memory store as a clone of the memory_store input and writes the consolidated memories into it. The input store is never mutated.

    • BetaOutputBehaviorCreateNew object

      The default destination: the job creates a new output memory store as a clone of the memory_store input and writes the consolidated memories into it. The input store is never mutated.

      • type: "create_new"

    • BetaOutputBehaviorUpdateExisting object

      The job writes the consolidated memories into this existing memory store instead of creating one. In EAP the store must be the job's own memory_store input, so the job consolidates the store in place.

      • type: "update_existing"

      • memory_store_id: string

        minLength: 1

  • outputs: array of BetaDreamOutput

    • type: "memory_store"

    • memory_store_id: string

  • session_id: string or null

  • status: BetaDreamStatus

    Lifecycle status of a Dream.

    • "pending"

    • "running"

    • "completed"

    • "failed"

    • "canceled"

  • usage: BetaDreamUsage

    Cumulative token usage for the dream across every pipeline stage.

    • cache_creation_input_tokens: number

      Total tokens used to create prompt-cache entries (sum of all TTL tiers).

      format: int32

    • cache_read_input_tokens: number

      Total tokens read from prompt cache.

      format: int32

    • input_tokens: number

      Total uncached input tokens consumed across every pipeline stage.

      format: int32

    • output_tokens: number

      Total output tokens generated across every pipeline stage.

      format: int32

Example

curl https://api.anthropic.com/v1/dreams/$DREAM_ID/cancel \
    -X POST \
    -H 'anthropic-version: 2023-06-01' \
    -H 'anthropic-beta: dreaming-2026-04-21' \
    -H "X-Api-Key: $ANTHROPIC_API_KEY"

Response (200)

{
  "id": "id",
  "archived_at": "2019-12-27T18:11:19.117Z",
  "created_at": "2019-12-27T18:11:19.117Z",
  "ended_at": "2019-12-27T18:11:19.117Z",
  "error": {
    "message": "message",
    "type": "type"
  },
  "inputs": [
    {
      "memory_store_id": "x",
      "type": "memory_store"
    }
  ],
  "instructions": "instructions",
  "model": {
    "id": "x",
    "speed": "standard"
  },
  "output_behavior": {
    "type": "create_new"
  },
  "outputs": [
    {
      "memory_store_id": "memory_store_id",
      "type": "memory_store"
    }
  ],
  "session_id": "session_id",
  "status": "pending",
  "type": "dream",
  "usage": {
    "cache_creation_input_tokens": 0,
    "cache_read_input_tokens": 0,
    "input_tokens": 0,
    "output_tokens": 0
  }
}