Blast JSON-RPC API
Ethereum-compatible JSON-RPC methods exposed by the Blast node.
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OpenAPI Specification
openapi: 3.2.0
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:
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: []
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.