Jito Labs Transactions API

openapi: 3.1.0
info:
  title: Jito Block Engine JSON-RPC Bundles Transactions API
  version: '1.0'
  description: JSON-RPC API for the Jito Block Engine. The Block Engine accepts bundles and transactions from searchers, bots, and dApps and forwards them to Jito-Solana leader validators for atomic block inclusion. Bundles are ordered, atomic groups of up to five Solana transactions that must execute together — if any one fails the entire bundle reverts. A SOL tip to a designated tip account is required for bundles to be considered by leaders.
  contact:
    name: Jito Labs
    url: https://www.jito.network
  license:
    name: Apache-2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
  x-mev: true
  x-network: solana
servers:
- url: https://mainnet.block-engine.jito.wtf
  description: Mainnet global
- url: https://amsterdam.mainnet.block-engine.jito.wtf
  description: Mainnet Amsterdam
- url: https://dublin.mainnet.block-engine.jito.wtf
  description: Mainnet Dublin
- url: https://frankfurt.mainnet.block-engine.jito.wtf
  description: Mainnet Frankfurt
- url: https://london.mainnet.block-engine.jito.wtf
  description: Mainnet London
- url: https://ny.mainnet.block-engine.jito.wtf
  description: Mainnet New York
- url: https://slc.mainnet.block-engine.jito.wtf
  description: Mainnet Salt Lake City
- url: https://singapore.mainnet.block-engine.jito.wtf
  description: Mainnet Singapore
- url: https://tokyo.mainnet.block-engine.jito.wtf
  description: Mainnet Tokyo
- url: https://testnet.block-engine.jito.wtf
  description: Testnet global
- url: https://dallas.testnet.block-engine.jito.wtf
  description: Testnet Dallas
- url: https://ny.testnet.block-engine.jito.wtf
  description: Testnet New York
tags:
- name: Transactions
  description: Direct sendTransaction proxy to validator leaders.
paths:
  /api/v1/transactions:
    post:
      summary: Send Transaction Through Block Engine
      operationId: transactionsRpc
      tags:
      - Transactions
      description: JSON-RPC 2.0 endpoint exposing the `sendTransaction` method. Acts as a direct proxy to Solana's `sendTransaction`, but routes the transaction through the Block Engine to the next leader for inclusion. Optional `bundleOnly=true` query parameter forces the transaction to be wrapped in a single-tx bundle so it is processed under bundle semantics.
      parameters:
      - in: query
        name: bundleOnly
        schema:
          type: boolean
        description: When true, the transaction is treated as a single-transaction bundle.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SendTransactionRequest'
      responses:
        '200':
          description: Signature of the submitted transaction.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SendTransactionResponse'
        '429':
          description: Rate limited.
components:
  schemas:
    JsonRpcEnvelope:
      type: object
      required:
      - jsonrpc
      - id
      - method
      properties:
        jsonrpc:
          type: string
          enum:
          - '2.0'
        id:
          oneOf:
          - type: integer
          - type: string
        method:
          type: string
    SendTransactionResponse:
      type: object
      properties:
        jsonrpc:
          type: string
        id:
          type: integer
        result:
          type: string
          description: Transaction signature.
    SendTransactionRequest:
      allOf:
      - $ref: '#/components/schemas/JsonRpcEnvelope'
      - type: object
        properties:
          method:
            const: sendTransaction
          params:
            type: array
            minItems: 1
            maxItems: 2
            items:
              oneOf:
              - type: string
                description: Base-58 or base-64 encoded signed transaction.
              - type: object
                properties:
                  encoding:
                    type: string
                    enum:
                    - base58
                    - base64
                  skipPreflight:
                    type: boolean
                  preflightCommitment:
                    type: string
                  maxRetries:
                    type: integer
                  minContextSlot:
                    type: integer