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

<AgentInstructions>

## Submitting Feedback

If you encounter incorrect, outdated, or confusing documentation on this page, submit feedback:

POST https://docs.ton.org/feedback

```json
{
  "path": "/ecosystem/api/toncenter/v2/blocks/get-shards",
  "feedback": "Description of the issue"
}
```

Only submit feedback when you have something specific and actionable to report.

</AgentInstructions>

# Get shards

> Returns the active shardchain block identifiers at a given masterchain block height. Each shard processes a subset of accounts in parallel. The response shows how the basechain is currently partitioned and which block each shard is at.



## OpenAPI

````yaml get /api/v2/getShards
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 a JSON-RPC
    endpoint  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: TON Mainnet
  - url: https://testnet.toncenter.com
    description: TON Testnet
security: []
tags:
  - name: Accounts
    description: Information about accounts
  - name: Transactions
    description: Fetching and locating transactions
  - name: Blocks
    description: Information about blocks
  - name: Run method
    description: Run get-method of smart contracts
  - name: Send
    description: Send data to blockchain
  - name: Utils
    description: Some useful methods
  - name: Configuration
    description: Information about blockchain config
  - name: RPC
    description: JSON-RPC and POST endpoints
paths:
  /api/v2/getShards:
    get:
      tags:
        - Blocks
      summary: Get shards
      description: >-
        Returns the active shardchain block identifiers at a given masterchain
        block height. Each shard processes a subset of accounts in parallel. The
        response shows how the basechain is currently partitioned and which
        block each shard is at.
      operationId: getShards_get
      parameters:
        - $ref: '#/components/parameters/seqno'
          description: Seqno of masterchain block
      responses:
        '200':
          description: >-
            Returns the list of active shard block identifiers at the specified
            masterchain block.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TonlibResponse'
        '401':
          $ref: '#/components/responses/401'
        '403':
          $ref: '#/components/responses/403'
        '422':
          $ref: '#/components/responses/422_block'
        '429':
          $ref: '#/components/responses/429'
        '504':
          $ref: '#/components/responses/504'
      security:
        - APIKeyHeader: []
        - APIKeyQuery: []
components:
  parameters:
    seqno:
      name: seqno
      in: query
      description: >-
        Masterchain block sequence number (block height). Used to query state at
        a specific point in time. If omitted, returns the current state.
      required: true
      schema:
        type: integer
        format: int32
  schemas:
    TonlibResponse:
      type: object
      title: TonlibResponse
      additionalProperties: false
      required:
        - ok
        - result
        - '@extra'
      properties:
        ok:
          type: boolean
          title: Ok
          default: true
          description: >-
            Returns `true` if the request succeeded; otherwise `false`. See the
            `error` field for details.
        result:
          type: object
          description: >-
            The method return value. The structure depends on the method called;
            see individual method documentation for response schemas. Only
            present when `ok` is `true`.
          additionalProperties: true
        '@extra':
          type: string
          title: Extra information
          description: >-
            Optional request ID that can be passed in the request and received
            back in the response. Useful for matching async responses.
        jsonrpc:
          type: string
          description: JSON-RPC protocol version identifier.
        id:
          type: string
          description: Echoed request identifier from the original JSON-RPC request.
  responses:
    '401':
      description: API key does not exist. Check for typos or generate a new key.
      content:
        application/json:
          schema:
            type: object
            additionalProperties: false
            required:
              - ok
              - code
              - error
            properties:
              ok:
                type: boolean
                const: false
                description: Always `false` for error responses.
              code:
                type: integer
                const: 401
                description: HTTP status code `401`.
              error:
                type: string
                enum:
                  - API key does not exist
              '@extra':
                type: string
                description: Extra data passed through from the request.
          example:
            ok: false
            code: 401
            error: API key does not exist
    '403':
      description: >-
        API key is not allowed for this network (e.g. testnet key used on
        mainnet).
      content:
        application/json:
          schema:
            type: object
            additionalProperties: false
            required:
              - ok
              - code
              - error
            properties:
              ok:
                type: boolean
                const: false
                description: Always `false` for error responses.
              code:
                type: integer
                const: 403
                description: HTTP status code `403`.
              error:
                type: string
                enum:
                  - Network not allowed
              '@extra':
                type: string
                description: Extra data passed through from the request.
          example:
            ok: false
            code: 403
            error: Network not allowed
    '429':
      description: >-
        Rate limit exceeded. Back off and retry, or use an API key for higher
        limits.
      content:
        application/json:
          schema:
            type: object
            additionalProperties: false
            required:
              - ok
              - code
              - error
            properties:
              ok:
                type: boolean
                const: false
                description: Always `false` for error responses.
              code:
                type: integer
                const: 429
                description: HTTP status code `429`.
              error:
                type: string
                enum:
                  - Ratelimit exceeded
              '@extra':
                type: string
                description: Extra data passed through from the request.
          example:
            ok: false
            code: 429
            error: Ratelimit exceeded
    '504':
      description: Timeout waiting for liteserver response.
      content:
        application/json:
          schema:
            type: object
            additionalProperties: false
            required:
              - ok
              - code
              - error
            properties:
              ok:
                type: boolean
                const: false
                description: Always `false` for error responses.
              code:
                type: integer
                const: 504
                description: HTTP status code `504`.
              error:
                type: string
                enum:
                  - LITE_SERVER_NETWORK timeout
              '@extra':
                type: string
                description: Extra data passed through from the request.
          example:
            ok: false
            code: 504
            error: LITE_SERVER_NETWORK timeout
    422_block:
      description: Invalid block query parameters.
      content:
        application/json:
          schema:
            type: object
            additionalProperties: false
            required:
              - ok
              - code
              - error
            properties:
              ok:
                type: boolean
                const: false
                description: Always `false` for error responses.
              code:
                type: integer
                const: 422
                description: HTTP status code `422`.
              error:
                type: string
                enum:
                  - workchain required
                  - shard required
                  - seqno required
                  - failed to parse workchain
                  - failed to parse shard
                  - failed to parse root_hash
                  - failed to parse seqno
                  - seqno should be positive
                  - from_seqno should be non-negative
              '@extra':
                type: string
                description: Extra data passed through from the request.
          example:
            ok: false
            code: 422
            error: workchain required
  securitySchemes:
    APIKeyHeader:
      type: apiKey
      in: header
      name: X-API-Key
      description: >-
        API key header of the form `X-API-Key: <token>`, where `<token>` is the
        API key. Requests without a key are limited to 1 RPS. Refer to the
        [authentication guide](/ecosystem/api/toncenter/v2-authentication) for
        details.
    APIKeyQuery:
      type: apiKey
      in: query
      name: api_key
      description: >-
        API key query parameter of the form `?api_key=<token>`, where `<token>`
        is the API key. Equivalent to the header method. Refer to the
        [authentication guide](/ecosystem/api/toncenter/v2-authentication) for
        details.

````