Blast JSON-RPC API

openapi: 3.1.0
info:
  title: Blast Network JSON-RPC API
  description: 'Public Ethereum-compatible JSON-RPC endpoint for the Blast Layer 2

    network (OP Stack derived). Mainnet is chain ID 81457 at

    https://rpc.blast.io; Sepolia testnet is chain ID 168587773 at

    https://sepolia.blast.io. This OpenAPI describes the JSON-RPC

    transport: all calls are HTTP POSTs to `/` with a JSON-RPC 2.0

    envelope and a method-specific `params` array.

    '
  version: '1.0'
  contact:
    name: Blast
    url: https://docs.blast.io
servers:
- url: https://rpc.blast.io
  description: Blast Mainnet (chain ID 81457)
- url: https://sepolia.blast.io
  description: Blast Sepolia Testnet (chain ID 168587773)
tags:
- name: JSON-RPC
  description: Ethereum-compatible JSON-RPC methods exposed by the Blast node.
paths:
  /:
    post:
      tags:
      - JSON-RPC
      summary: Invoke a JSON-RPC method
      description: 'Send any Ethereum-compatible JSON-RPC method (eth_, net_, web3_,

        debug_, trace_ where supported). Use the `method` field to

        select the call. Common methods include `eth_chainId`,

        `eth_blockNumber`, `eth_getBalance`, `eth_call`,

        `eth_estimateGas`, `eth_gasPrice`, `eth_getTransactionByHash`,

        `eth_getTransactionReceipt`, `eth_sendRawTransaction`,

        `eth_getLogs`, `eth_getBlockByNumber`, `eth_getBlockByHash`,

        `net_version`, `web3_clientVersion`.

        '
      operationId: jsonRpc
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/JsonRpcRequest'
            examples:
              chainId:
                summary: Get chain ID
                value:
                  jsonrpc: '2.0'
                  id: 1
                  method: eth_chainId
                  params: []
              blockNumber:
                summary: Latest block number
                value:
                  jsonrpc: '2.0'
                  id: 1
                  method: eth_blockNumber
                  params: []
              getBalance:
                summary: Address balance at latest block
                value:
                  jsonrpc: '2.0'
                  id: 1
                  method: eth_getBalance
                  params:
                  - '0x0000000000000000000000000000000000000000'
                  - latest
      responses:
        '200':
          description: JSON-RPC response (either result or error).
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcResponse'
components:
  schemas:
    JsonRpcResponse:
      type: object
      required:
      - jsonrpc
      - id
      properties:
        jsonrpc:
          type: string
          const: '2.0'
        id:
          oneOf:
          - type: integer
          - type: string
          - type: 'null'
        result:
          description: Method-specific result (present on success).
        error:
          type: object
          properties:
            code:
              type: integer
            message:
              type: string
            data:
              description: Optional error data.
    JsonRpcRequest:
      type: object
      required:
      - jsonrpc
      - method
      - id
      properties:
        jsonrpc:
          type: string
          const: '2.0'
        id:
          oneOf:
          - type: integer
          - type: string
        method:
          type: string
          example: eth_blockNumber
        params:
          type: array
          items: {}
          default: []