> ## Documentation Index
> Fetch the complete documentation index at: https://toncenter.ness.su/llms.txt
> Use this file to discover all available pages before exploring further.

# Get Masterchain Block Signatures

> Get signatures of validators for masterchain block



## OpenAPI

````yaml GET /api/v2/getMasterchainBlockSignatures
openapi: 3.1.1
info:
  title: TON HTTP API C++
  description: >
    This API enables HTTP access to TON blockchain - getting accounts and
    wallets information, looking up blocks and transactions, sending messages to
    the blockchain, calling get methods of smart contracts, and more.


    In addition to REST API, all methods are available through [JSON-RPC
    endpoint](#json%20rpc)  with `method` equal to method name and `params`
    passed as a dictionary.


    The response contains a JSON object, which always has a boolean field `ok`
    and either `error` or `result`. If `ok` equals true, the request was
    successful and the result of the query can be found in the `result` field.
    In case of an unsuccessful request, `ok` equals false and the error is
    explained in the `error`.


    API Key should be sent either as `api_key` query parameter or `X-API-Key`
    header
  version: 2.1.1
servers:
  - url: https://toncenter.com
    description: Mainnet
  - url: https://testnet.toncenter.com
    description: Testnet
security: []
tags:
  - name: utils
    description: Some useful methods
  - name: accounts
    description: Information about accounts
  - name: blocks
    description: Information about blocks
  - name: transactions
    description: Fetching and locating transactions
  - name: configuration
    description: Information about blockchain config
  - name: run method
    description: Run get-method of smart contracts
  - name: send
    description: Send data to blockchain
  - name: rpc
    description: JSON-RPC and POST endpoints
paths:
  /api/v2/getMasterchainBlockSignatures:
    get:
      tags:
        - blocks
      summary: Get Masterchain Block Signatures
      description: Get signatures of validators for masterchain block
      operationId: getMasterchainBlockSignatures_get
      parameters:
        - $ref: '#/components/parameters/seqno'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: object
                properties:
                  ok:
                    type: boolean
                    example: true
                  result:
                    title: BlockSignatures
                    allOf:
                      - $ref: '#/components/schemas/BlockSignatures'
                required:
                  - ok
                  - result
        default:
          $ref: '#/components/responses/default'
components:
  parameters:
    seqno:
      name: seqno
      in: query
      description: Seqno of a block
      required: true
      schema:
        type: integer
        format: int32
  schemas:
    BlockSignatures:
      type: object
      additionalProperties: false
      properties:
        '@type':
          type: string
          enum:
            - blocks.blockSignatures
          default: blocks.blockSignatures
        id:
          $ref: '#/components/schemas/TonBlockIdExt'
        signatures:
          type: array
          items:
            $ref: '#/components/schemas/BlockSignature'
      required:
        - '@type'
        - id
        - signatures
    TonBlockIdExt:
      type: object
      additionalProperties: false
      properties:
        '@type':
          type: string
          enum:
            - ton.blockIdExt
          default: ton.blockIdExt
        workchain:
          type: integer
        shard:
          type: string
          x-usrv-cpp-type: std::int64_t
        seqno:
          type: integer
        root_hash:
          $ref: '#/components/schemas/TonHash'
        file_hash:
          $ref: '#/components/schemas/TonHash'
      required:
        - '@type'
        - workchain
        - shard
        - seqno
        - root_hash
        - file_hash
      description: Extended block identifier.
    BlockSignature:
      type: object
      additionalProperties: false
      properties:
        '@type':
          type: string
          enum:
            - blocks.signature
          default: blocks.signature
        node_id_short:
          $ref: '#/components/schemas/TonHash'
        signature:
          $ref: '#/components/schemas/Bytes'
      required:
        - '@type'
        - node_id_short
        - signature
    TonlibErrorResponse:
      type: object
      additionalProperties: false
      title: TonlibErrorResponse
      required:
        - ok
        - error
        - code
      properties:
        ok:
          type: boolean
          title: Ok
          default: false
        error:
          type: string
          title: Error description
        code:
          type: integer
          title: Error code
          minimum: 100
          maximum: 600
        '@extra':
          type: string
          title: Extra information
        jsonrpc:
          type: string
        id:
          type: string
    TonHash:
      type: string
      x-usrv-cpp-type: ton_http::types::ton_hash
    Bytes:
      type: string
      x-usrv-cpp-type: ton_http::types::bytes
  responses:
    default:
      description: Tonlib error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/TonlibErrorResponse'
          examples:
            '409':
              summary: Not a token
              value:
                ok: false
                code: 409
                error: Smart contract is not a Jetton or NFT
                '@extra': ...
            '422':
              summary: Request validation error
              value:
                ok: false
                code: 422
                error: ...
                '@extra': ...
            '429':
              summary: Ratelimit exceeded
              value:
                ok: false
                code: 429
                error: ...
                '@extra': ...
            '504':
              summary: Tonlib timeout
              value:
                ok: false
                code: 504
                error: ...
                '@extra': ...

````