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

# Get Blockchain Masterchain Head

> Get last known masterchain block



## OpenAPI

````yaml GET /v2/blockchain/masterchain-head
openapi: 3.0.0
info:
  title: REST api to TON blockchain explorer
  version: 2.0.0
  description: Provide access to indexed TON blockchain
  contact:
    name: Support
    email: support@tonkeeper.com
servers:
  - url: https://tonapi.io
  - url: https://testnet.tonapi.io
  - url: http://localhost:8081
security: []
tags:
  - name: Accounts
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/accounts
  - name: NFT
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/nft
  - name: Jettons
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/jettons
  - name: DNS
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/dns
  - name: Wallet
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/wallet
  - name: Rates
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/rates
  - name: Staking
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/staking
  - name: Traces
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/traces
  - name: Events
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/events
  - name: Storage
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/storage
  - name: Connect
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/connect
  - name: Gasless
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/gasless
  - name: Multisig
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/multisig
  - name: Blockchain
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/blockchain
  - name: Lite Server
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/lite-server
  - name: Emulation
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/emulation
  - name: Utilities
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/utilities
  - name: ExtraCurrency
    externalDocs:
      description: Additional documentation
      url: https://docs.tonconsole.com/tonapi/rest-api/extra-currency
  - name: Purchases
paths:
  /v2/blockchain/masterchain-head:
    get:
      tags:
        - Blockchain
      description: Get last known masterchain block
      operationId: getBlockchainMasterchainHead
      responses:
        '200':
          description: blockchain masterchain head
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BlockchainBlock'
        default:
          $ref: '#/components/responses/Error'
components:
  schemas:
    BlockchainBlock:
      type: object
      required:
        - workchain_id
        - shard
        - seqno
        - root_hash
        - file_hash
        - global_id
        - value_flow
        - version
        - after_merge
        - before_split
        - after_split
        - want_split
        - want_merge
        - key_block
        - gen_utime
        - start_lt
        - end_lt
        - vert_seqno
        - gen_catchain_seqno
        - min_ref_mc_seqno
        - prev_key_block_seqno
        - prev_refs
        - in_msg_descr_length
        - out_msg_descr_length
        - rand_seed
        - created_by
        - tx_quantity
      properties:
        tx_quantity:
          type: integer
          example: 130
        value_flow:
          $ref: '#/components/schemas/BlockValueFlow'
        workchain_id:
          type: integer
          example: 0
          format: int32
        shard:
          type: string
          example: '8000000000000000'
        seqno:
          type: integer
          example: 21734019
          format: int32
        root_hash:
          type: string
          example: 131D0C65055F04E9C19D687B51BC70F952FD9CA6F02C2801D3B89964A779DF85
        file_hash:
          type: string
          example: A6A0BD6608672B11B79538A50B2204E748305C12AA0DED9C16CF0006CE3AF8DB
        global_id:
          type: integer
          example: -239
          format: int32
        version:
          type: integer
          example: 0
          format: int32
        after_merge:
          type: boolean
          example: true
        before_split:
          type: boolean
          example: true
        after_split:
          type: boolean
          example: true
        want_split:
          type: boolean
          example: true
        want_merge:
          type: boolean
          example: true
        key_block:
          type: boolean
          example: true
        gen_utime:
          type: integer
          format: int64
          example: 1674826775
        start_lt:
          type: integer
          format: int64
          example: 23814011000000
          x-js-format: bigint
        end_lt:
          type: integer
          format: int64
          example: 23814011000001
          x-js-format: bigint
        vert_seqno:
          type: integer
          example: 0
          format: int32
        gen_catchain_seqno:
          type: integer
          example: 0
          format: int32
        min_ref_mc_seqno:
          type: integer
          example: 0
          format: int32
        prev_key_block_seqno:
          type: integer
          example: 0
          format: int32
        gen_software_version:
          type: integer
          example: 0
          format: int32
        gen_software_capabilities:
          type: integer
          format: int64
          example: 0
        master_ref:
          type: string
          example: (-1,4234234,8000000000000000)
        prev_refs:
          type: array
          items:
            type: string
            example:
              - (-1
              - 4234235
              - 8000000000000000)
        in_msg_descr_length:
          type: integer
          format: int64
          example: 0
        out_msg_descr_length:
          type: integer
          format: int64
          example: 0
        rand_seed:
          type: string
          example: 131D0C65055F04E9C19D687B51BC70F952FD9CA6F02C2801D3B89964A779DF85
        created_by:
          type: string
          example: A6A0BD6608672B11B79538A50B2204E748305C12AA0DED9C16CF0006CE3AF8DB
    BlockValueFlow:
      type: object
      required:
        - from_prev_blk
        - to_next_blk
        - imported
        - exported
        - fees_collected
        - fees_imported
        - recovered
        - created
        - minted
      properties:
        from_prev_blk:
          $ref: '#/components/schemas/BlockCurrencyCollection'
        to_next_blk:
          $ref: '#/components/schemas/BlockCurrencyCollection'
        imported:
          $ref: '#/components/schemas/BlockCurrencyCollection'
        exported:
          $ref: '#/components/schemas/BlockCurrencyCollection'
        fees_collected:
          $ref: '#/components/schemas/BlockCurrencyCollection'
        burned:
          $ref: '#/components/schemas/BlockCurrencyCollection'
        fees_imported:
          $ref: '#/components/schemas/BlockCurrencyCollection'
        recovered:
          $ref: '#/components/schemas/BlockCurrencyCollection'
        created:
          $ref: '#/components/schemas/BlockCurrencyCollection'
        minted:
          $ref: '#/components/schemas/BlockCurrencyCollection'
    BlockCurrencyCollection:
      type: object
      required:
        - grams
        - other
      properties:
        grams:
          type: integer
          format: int64
          example: 10000000000
          x-js-format: bigint
        other:
          type: array
          items:
            type: object
            required:
              - id
              - value
            properties:
              id:
                type: integer
                format: int64
                example: 13
              value:
                type: string
                x-js-format: bigint
                example: '10000000000'
  responses:
    Error:
      description: Some error during request processing
      content:
        application/json:
          schema:
            type: object
            required:
              - error
            properties:
              error:
                type: string
              error_code:
                type: integer
                format: int64

````