> ## 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 Raw Blockchain Block Header

> Get raw blockchain block header



## OpenAPI

````yaml GET /v2/liteserver/get_block_header/{block_id}
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/liteserver/get_block_header/{block_id}:
    get:
      tags:
        - Lite Server
      description: Get raw blockchain block header
      operationId: getRawBlockchainBlockHeader
      parameters:
        - $ref: '#/components/parameters/blockchainBlockIDExtParameter'
        - $ref: '#/components/parameters/modeQuery'
      responses:
        '200':
          description: raw blockchain block header
          content:
            application/json:
              schema:
                type: object
                required:
                  - id
                  - mode
                  - header_proof
                properties:
                  id:
                    $ref: '#/components/schemas/BlockRaw'
                  mode:
                    type: integer
                    example: 0
                    format: int32
                  header_proof:
                    type: string
                    example: >-
                      131D0C65055F04E9C19D687B51BC70F952FD9CA6F02C2801D3B89964A779DF85
        default:
          $ref: '#/components/responses/Error'
components:
  parameters:
    blockchainBlockIDExtParameter:
      in: path
      name: block_id
      required: true
      description: 'block ID: (workchain,shard,seqno,root_hash,file_hash)'
      schema:
        type: string
        example: (-1,8000000000000000,4234234,3E575DAB1D25...90D8,47192E5C46C...BB29)
    modeQuery:
      in: query
      name: mode
      required: true
      description: mode
      schema:
        type: integer
        example: 0
        format: int32
  schemas:
    BlockRaw:
      type: object
      required:
        - workchain
        - shard
        - seqno
        - root_hash
        - file_hash
      properties:
        workchain:
          type: integer
          example: 4294967295
          format: int32
        shard:
          type: string
          example: '800000000000000'
        seqno:
          type: integer
          example: 30699640
          format: int32
        root_hash:
          type: string
          example: 131D0C65055F04E9C19D687B51BC70F952FD9CA6F02C2801D3B89964A779DF85
        file_hash:
          type: string
          example: A6A0BD6608672B11B79538A50B2204E748305C12AA0DED9C16CF0006CE3AF8DB
  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

````