openapi: 3.1.0
info:
  title: EOSIO / Antelope Nodeos Chain Get Abi Send Transaction API
  description: HTTP/JSON RPC interface exposed by the chain_api_plugin in nodeos, the reference EOSIO (now Antelope) blockchain node implementation. The chain API allows clients to read blockchain state, fetch blocks and accounts, inspect ABI and contract data, and submit signed transactions to the network.
  version: '1.0'
  contact:
    name: EOS Network Foundation
    url: https://eosnetwork.com/
  license:
    name: MIT
    url: https://github.com/AntelopeIO/leap/blob/main/LICENSE
servers:
- url: '{node}/v1/chain'
  description: Nodeos HTTP RPC endpoint with chain_api_plugin enabled.
  variables:
    node:
      default: https://eos.greymass.com
      description: Base URL of an EOS/Antelope node.
tags:
- name: Send Transaction
paths:
  /send_transaction:
    post:
      summary: Send a signed transaction
      description: Submits a signed transaction to the blockchain. Replaces push_transaction on modern nodeos releases.
      operationId: sendTransaction
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                signatures:
                  type: array
                  items:
                    type: string
                compression:
                  type: string
                  enum:
                  - none
                  - zlib
                  default: none
                packed_context_free_data:
                  type: string
                packed_trx:
                  type: string
              required:
              - signatures
              - packed_trx
      responses:
        '200':
          description: Transaction processing result.
          content:
            application/json:
              schema:
                type: object
      tags:
      - Send Transaction