Neynar Verifications API

openapi: 3.2.0
info:
  title: Farcaster Hub Verifications API
  version: 2.35.0
  description: 'Perform basic queries of Farcaster state via the REST API of a Farcaster hub. See the [Neynar docs](https://docs.neynar.com/reference) for more details.

    '
  contact:
    name: Neynar
    url: https://neynar.com/
    email: team@neynar.com
servers:
- url: https://snapchain-api.neynar.com
security:
- ApiKeyAuth: []
tags:
- name: Verifications
  description: Operations related to verifications.
paths:
  /v1/verificationsByFid:
    get:
      tags:
      - Verifications
      summary: Provided by an FID
      description: Fetch verifications provided by a user.
      externalDocs:
        description: Fetch verifications provided by a user
        url: https://docs.neynar.com/reference/fetch-verifications-by-fid
      operationId: fetch-verifications-by-fid
      parameters:
      - name: fid
        in: query
        required: true
        schema:
          type: integer
        description: The FID being requested
        example: 616
      - name: address
        in: query
        required: false
        schema:
          type: string
        description: The optional ETH address to filter by
      - $ref: '#/components/parameters/pageSize'
      - $ref: '#/components/parameters/paginationReverse'
      - $ref: '#/components/parameters/pageToken'
      responses:
        '200':
          description: The requested Verifications.
          content:
            application/json:
              schema:
                required:
                - messages
                - nextPageToken
                type: object
                properties:
                  messages:
                    type: array
                    items:
                      $ref: '#/components/schemas/Verification'
                  nextPageToken:
                    pattern: ^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$
                    type: string
                    format: byte
        default:
          $ref: '#/components/responses/ErrorResponse'
      x-codegen-request-body-name: body
components:
  responses:
    ErrorResponse:
      description: An unexpected error response.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  schemas:
    ErrorResponse:
      required:
      - code
      - details
      - errCode
      - metadata
      - name
      - presentable
      type: object
      properties:
        errCode:
          type: string
        presentable:
          type: boolean
        name:
          type: string
        code:
          type: integer
        details:
          type: string
        metadata:
          required:
          - errcode
          type: object
          properties:
            errcode:
              type: array
              items:
                type: string
    MessageType:
      type: string
      description: 'Type of the MessageBody.

        - MESSAGE_TYPE_CAST_ADD: Add a new Cast

        - MESSAGE_TYPE_CAST_REMOVE: Remove an existing Cast

        - MESSAGE_TYPE_REACTION_ADD: Add a Reaction to a Cast

        - MESSAGE_TYPE_REACTION_REMOVE: Remove a Reaction from a Cast

        - MESSAGE_TYPE_LINK_ADD: Add a new Link

        - MESSAGE_TYPE_LINK_REMOVE: Remove an existing Link

        - MESSAGE_TYPE_VERIFICATION_ADD_ETH_ADDRESS: Add a Verification of an Ethereum Address

        - MESSAGE_TYPE_VERIFICATION_REMOVE: Remove a Verification

        - MESSAGE_TYPE_USER_DATA_ADD: Add metadata about a user

        - MESSAGE_TYPE_USERNAME_PROOF: Add or replace a username proof

        - MESSAGE_TYPE_FRAME_ACTION: A Farcaster Frame action'
      default: MESSAGE_TYPE_CAST_ADD
      enum:
      - MESSAGE_TYPE_CAST_ADD
      - MESSAGE_TYPE_CAST_REMOVE
      - MESSAGE_TYPE_REACTION_ADD
      - MESSAGE_TYPE_REACTION_REMOVE
      - MESSAGE_TYPE_LINK_ADD
      - MESSAGE_TYPE_LINK_REMOVE
      - MESSAGE_TYPE_VERIFICATION_ADD_ETH_ADDRESS
      - MESSAGE_TYPE_VERIFICATION_REMOVE
      - MESSAGE_TYPE_USER_DATA_ADD
      - MESSAGE_TYPE_USERNAME_PROOF
      - MESSAGE_TYPE_FRAME_ACTION
    MessageDataVerificationAdd:
      description: Represents a message that adds verification of ownership for an Ethereum or Solana address to a user's profile. This verification proves that the user controls the specified blockchain address.
      allOf:
      - $ref: '#/components/schemas/MessageDataCommon'
      - type: object
        required:
        - verificationAddEthAddressBody
        properties:
          verificationAddEthAddressBody:
            description: Contains the blockchain address being verified, along with cryptographic proof of ownership through a signature.
            allOf:
            - $ref: '#/components/schemas/VerificationAddEthAddressBody'
    HashScheme:
      type: string
      description: 'Type of hashing scheme used to produce a digest of MessageData. - HASH_SCHEME_BLAKE3: Default scheme for hashing MessageData

        '
      default: HASH_SCHEME_BLAKE3
      enum:
      - HASH_SCHEME_BLAKE3
    Verification:
      allOf:
      - $ref: '#/components/schemas/MessageCommon'
      - type: object
        properties:
          data:
            allOf:
            - $ref: '#/components/schemas/MessageDataVerificationAdd'
            - type: object
              properties:
                type:
                  $ref: '#/components/schemas/MessageType'
              required:
              - type
        required:
        - data
    MessageCommon:
      type: object
      properties:
        hash:
          title: Hash digest of data
          pattern: ^0x[0-9a-fA-F]{40}$
          type: string
          example: '0xd2b1ddc6c88e865a33cb1a565e0058d757042974'
        hashScheme:
          $ref: '#/components/schemas/HashScheme'
        signature:
          title: Signature of the hash digest
          pattern: ^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$
          type: string
          format: byte
        signatureScheme:
          $ref: '#/components/schemas/SignatureScheme'
        signer:
          title: Public key or address of the key pair that produced the signature
          pattern: ^0x[0-9a-fA-F]+$
          type: string
      required:
      - hash
      - hashScheme
      - signature
      - signatureScheme
      - signer
    SignatureScheme:
      type: string
      description: 'Type of signature scheme used to sign the Message hash

        - SIGNATURE_SCHEME_ED25519: Ed25519 signature (default)

        - SIGNATURE_SCHEME_EIP712: ECDSA signature using EIP-712 scheme'
      default: SIGNATURE_SCHEME_ED25519
      enum:
      - SIGNATURE_SCHEME_ED25519
      - SIGNATURE_SCHEME_EIP712
    MessageDataCommon:
      description: Common properties shared by all Farcaster message types. These properties provide essential metadata about the message's origin, timing, and network context.
      required:
      - fid
      - network
      - timestamp
      type: object
      properties:
        type:
          $ref: '#/components/schemas/MessageType'
        fid:
          title: Farcaster ID of the user producing the message
          description: The unique identifier (FID) of the user who created this message. FIDs are assigned sequentially when users register on the network and cannot be changed.
          type: integer
          format: uint64
          example: 2
        timestamp:
          description: Seconds since Farcaster Epoch (2021-01-01T00:00:00Z). Used to order messages chronologically and determine the most recent state. Must be within 10 minutes of the current time when the message is created.
          type: integer
          format: int64
          example: 48994466
        network:
          $ref: '#/components/schemas/FarcasterNetwork'
    VerificationAddEthAddressBody:
      description: Contains the data required to verify ownership of an Ethereum or Solana address. The verification process requires a cryptographic signature from the blockchain address and includes the block hash at the time of signing for timestamp verification.
      type: object
      properties:
        address:
          title: Blockchain Address
          description: The Ethereum (0x-prefixed) or Solana address that the user is claiming ownership of. Must match the address that produced the signature.
          pattern: ^(?:0x[a-fA-F0-9]{40}|[1-9A-HJ-NP-Za-km-z]{32,44})$
          type: string
          example: '0x1234567890123456789012345678901234567890'
        ethSignature:
          title: Cryptographic Signature
          description: Base64-encoded signature produced by the blockchain address, proving ownership. For Ethereum, this is an ECDSA signature of a specific message format.
          pattern: ^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$
          type: string
          format: byte
          example: 4mGN6TACFqXUVU9RpwLDGCqgqiV1GidEFk9eKF0L0h6JNqmN3kRM9NMPnjUnkh8oL6+jFeQJ9YVuKX4F9EqGiAE=
        blockHash:
          title: Block Hash
          description: The hash of the most recent block when the signature was created. Used to verify the approximate time of signature creation.
          pattern: ^(0x[a-fA-F0-9]{64}|[1-9A-HJ-NP-Za-km-z]{44})$
          type: string
          example: '0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef'
      required:
      - address
      - ethSignature
      - blockHash
    FarcasterNetwork:
      type: string
      description: 'Farcaster network the message is intended for.

        - FARCASTER_NETWORK_MAINNET: Public primary network

        - FARCASTER_NETWORK_TESTNET: Public test network

        - FARCASTER_NETWORK_DEVNET: Private test network'
      default: FARCASTER_NETWORK_MAINNET
      enum:
      - FARCASTER_NETWORK_MAINNET
      - FARCASTER_NETWORK_TESTNET
      - FARCASTER_NETWORK_DEVNET
  parameters:
    pageToken:
      name: pageToken
      in: query
      description: The page token returned by the previous query, to fetch the next page. If this parameter is empty, fetch the first page
      schema:
        type: string
    paginationReverse:
      name: reverse
      in: query
      description: Reverse the sort order, returning latest messages first
      schema:
        type: boolean
    pageSize:
      name: pageSize
      in: query
      description: Maximum number of messages to return in a single response
      schema:
        type: integer
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
      description: API key to authorize requests
      x-default: NEYNAR_API_DOCS