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

# getGenesisHash

> Returns the genesis hash — the unique identifier for a Solana cluster (mainnet, devnet, or testnet) — used to verify connection to the intended network.



## OpenAPI

````yaml openapi/rpc-http/getGenesisHash.yaml POST /
openapi: 3.1.0
info:
  title: Solana RPC API
  version: 1.0.0
  description: >-
    Network identification API for retrieving the unique genesis hash that
    serves as the cryptographic identifier of the specific Solana blockchain
    network (mainnet, testnet, or devnet).
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0.html
servers:
  - url: https://mainnet.helius-rpc.com
    description: Mainnet RPC endpoint
  - url: https://devnet.helius-rpc.com
    description: Devnet RPC endpoint
security: []
paths:
  /:
    post:
      tags:
        - RPC
      summary: getGenesisHash
      description: >
        Retrieve the unique cryptographic identifier of the Solana blockchain
        network you're connected to.

        This network verification API returns the genesis hash - a distinctive
        fingerprint created from the

        very first block of the blockchain that uniquely identifies whether
        you're connected to Solana mainnet,

        testnet, devnet, or a custom cluster. The genesis hash serves as a
        fundamental chain identifier that

        never changes for a specific network. Essential for applications that
        need to verify they're connected

        to the expected Solana network before performing transactions,
        cross-chain services that must

        distinguish between different Solana environments, and frameworks
        building network-aware functionality.
      operationId: getGenesisHash
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                jsonrpc:
                  type: string
                  description: The JSON-RPC protocol version.
                  enum:
                    - '2.0'
                  example: '2.0'
                  default: '2.0'
                id:
                  type: string
                  description: A unique identifier for the request.
                  example: '1'
                  default: '1'
                method:
                  type: string
                  description: The name of the RPC method to invoke.
                  enum:
                    - getGenesisHash
                  example: getGenesisHash
                  default: getGenesisHash
            example:
              jsonrpc: '2.0'
              id: '1'
              method: getGenesisHash
      responses:
        '200':
          description: Successfully retrieved the genesis hash.
          content:
            application/json:
              schema:
                type: object
                properties:
                  jsonrpc:
                    type: string
                    description: The JSON-RPC protocol version.
                    enum:
                      - '2.0'
                    example: '2.0'
                  id:
                    type: string
                    description: Identifier matching the request.
                    example: '1'
                  result:
                    type: string
                    description: >-
                      Unique genesis hash (base-58 encoded) that
                      cryptographically identifies this specific Solana
                      blockchain network (different for mainnet, testnet,
                      devnet).
                    example: GH7ome3EiwEr7tu9JuTh2dpYWBJK3z69Xm1ZE3MEE6JC
        '400':
          description: Bad Request - Invalid request parameters or malformed request.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                jsonrpc: '2.0'
                error:
                  code: -32602
                  message: Invalid params
        '401':
          description: Unauthorized - Invalid or missing API key.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                jsonrpc: '2.0'
                error:
                  code: -32001
                  message: Unauthorized
                id: '1'
        '429':
          description: Too Many Requests - Rate limit exceeded.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                jsonrpc: '2.0'
                error:
                  code: -32005
                  message: Too many requests
                id: '1'
        '500':
          description: Internal Server Error - An error occurred on the server.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                jsonrpc: '2.0'
                error:
                  code: -32603
                  message: Internal error
                id: '1'
        '503':
          description: Service Unavailable - The service is temporarily unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                jsonrpc: '2.0'
                error:
                  code: -32002
                  message: Service unavailable
                id: '1'
        '504':
          description: Gateway Timeout - The request timed out.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                jsonrpc: '2.0'
                error:
                  code: -32003
                  message: Gateway timeout
                id: '1'
      security:
        - ApiKeyQuery: []
components:
  schemas:
    ErrorResponse:
      type: object
      properties:
        jsonrpc:
          type: string
          description: The JSON-RPC protocol version.
          enum:
            - '2.0'
          example: '2.0'
        error:
          type: object
          properties:
            code:
              type: integer
              description: The error code.
              example: -32602
            message:
              type: string
              description: The error message.
            data:
              type: object
              description: Additional data about the error.
        id:
          type: string
          description: Identifier matching the request.
          example: '1'
  securitySchemes:
    ApiKeyQuery:
      type: apiKey
      in: query
      name: api-key
      description: >-
        Your Helius API key. You can get one for free in the
        [dashboard](https://dashboard.helius.dev/api-keys).

````