> ## Documentation Index > Fetch the complete documentation index at: https://developers.circle.com/llms.txt > Use this file to discover all available pages before exploring further. # Cancel a transaction > Cancels a specified transaction from a developer-controlled wallet. Gas fees may still be incurred. This is a best-effort operation, it won't be effective if the original transaction has already been processed by the blockchain. ## OpenAPI ````yaml openapi/developer-controlled-wallets.yaml post /v1/w3s/developer/transactions/{id}/cancel openapi: 3.0.3 info: version: '1.0' title: Developer-Controlled Wallets description: Developer-Controlled Wallets API documentation. servers: - url: https://api.circle.com security: - BearerAuth: [] tags: - name: Wallet Sets - name: Wallets - name: Signing - name: Transactions - name: Token Lookup paths: /v1/w3s/developer/transactions/{id}/cancel: post: tags: - Transactions summary: Cancel a transaction description: > Cancels a specified transaction from a developer-controlled wallet. Gas fees may still be incurred. This is a best-effort operation, it won't be effective if the original transaction has already been processed by the blockchain. operationId: createDeveloperTransactionCancel parameters: - $ref: '#/components/parameters/Id' - $ref: '#/components/parameters/XRequestId' requestBody: $ref: '#/components/requestBodies/CancelTransactionForDeveloper' responses: '200': description: Transaction canceled content: application/json: schema: $ref: '#/components/schemas/CancelTransactionForDeveloper' headers: X-Request-Id: $ref: '#/components/headers/XRequestId' '400': $ref: '#/components/responses/DefaultError' '401': $ref: '#/components/responses/NotAuthorized' '404': $ref: '#/components/responses/NotFound' security: - BearerAuth: [] components: parameters: Id: name: id description: The universally unique identifier of the resource. in: path required: true schema: type: string format: uuid example: b3d9d2d5-4c12-4946-a09d-953e82fae2b0 XRequestId: name: X-Request-Id in: header description: > Developer-provided identifier for this request, used for tracing requests in Wallets API logs and the Developer Console, and when communicating with Circle Support. **Must be a UUID to appear in logs.** Non-UUID values are accepted by the API but are ignored by logging and tracing systems. schema: $ref: '#/components/schemas/XRequestId' requestBodies: CancelTransactionForDeveloper: required: true description: Cancel transaction for developer request content: application/json: schema: title: CancelTransactionForDeveloperRequest type: object required: - entitySecretCiphertext - idempotencyKey properties: idempotencyKey: $ref: '#/components/schemas/IdempotencyKey' entitySecretCiphertext: $ref: '#/components/schemas/EntitySecretCiphertext' schemas: CancelTransactionForDeveloper: title: CancelTransactionForDeveloperResponse type: object required: - data properties: data: type: object required: - id - state properties: id: $ref: '#/components/schemas/Id' state: $ref: '#/components/schemas/TransactionState' XRequestId: type: string format: uuid description: >- A unique identifier, which can be helpful for identifying a request when communicating with Circle support. example: 2adba88e-9d63-44bc-b975-9b6ae3440dde IdempotencyKey: type: string description: >- Universally unique identifier (UUID v4) idempotency key. This key is utilized to ensure exactly-once execution of mutating requests. To create a UUIDv4 go to [uuidgenerator.net](https://www.uuidgenerator.net). If the same key is reused, it will be treated as the same request and the original response will be returned. example: a0eebc99-9c0b-4ef8-bb6d-6bb9bd380a11 format: uuid EntitySecretCiphertext: type: string description: > A base64 string expression of the entity secret ciphertext. The entity secret should be encrypted by the entity public key. Circle mandates that the entity secret ciphertext is unique for each API request. format: byte example: >- 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 Id: type: string format: uuid description: System-generated unique identifier of the resource. example: c4d1da72-111e-4d52-bdbf-2e74a2d803d5 TransactionState: title: TransactionState type: string description: Current state of the transaction. enum: - INITIATED - CLEARED - QUEUED - SENT - STUCK - CONFIRMED - COMPLETE - FAILED - DENIED - CANCELLED Error: title: Error type: object required: - code - message properties: code: type: integer description: Code that corresponds to the error. message: type: string description: Message that describes the error. headers: XRequestId: description: > Developer-provided header parameter or Circle-generated universally unique identifier (UUID v4). Useful for identifying a specific request when communicating with Circle Support. schema: $ref: '#/components/schemas/XRequestId' responses: DefaultError: content: application/json: schema: $ref: '#/components/schemas/Error' description: Error response headers: X-Request-Id: $ref: '#/components/headers/XRequestId' NotAuthorized: content: application/json: schema: type: object title: NotAuthorizedResponse required: - code - message properties: code: type: integer description: Code that corresponds to the error. message: type: string description: Message that describes the error. example: code: 401 message: Malformed authorization. description: >- Request has not been applied because it lacks valid authentication credentials. headers: X-Request-Id: $ref: '#/components/headers/XRequestId' NotFound: content: application/json: schema: type: object title: NotFoundResponse required: - code - message properties: code: type: integer description: Code that corresponds to the error. message: type: string description: Message that describes the error. example: code: 404 message: Not found. description: Specified resource was not found. headers: X-Request-Id: $ref: '#/components/headers/XRequestId' securitySchemes: BearerAuth: type: http scheme: bearer bearerFormat: PREFIX:ID:SECRET description: >- Circle's API Keys are formatted in the following structure "PREFIX:ID:SECRET". All three parts are required to make a successful request. ````