openapi: 3.1.0
info:
  title: Ankr Advanced EVM API
  description: 'The Ankr Advanced API (AAPI) provides a specifically-tailored collection of JSON-RPC

    methods that optimize, index, cache, and store blockchain data across multiple

    EVM-compatible blockchains. The Advanced API exposes three logical groups:

    NFT, Token, and Query.

    '
  version: 1.0.0
  contact:
    name: Ankr
    url: https://www.ankr.com
    email: support@ankr.com
  license:
    name: Ankr Terms of Service
    url: https://www.ankr.com/terms/
servers:
- url: https://rpc.ankr.com/multichain
  description: Public multichain endpoint
- url: https://rpc.ankr.com/multichain/{API_KEY}
  description: Premium multichain endpoint
  variables:
    API_KEY:
      default: API_KEY
      description: Premium Plan project API key
security:
- {}
- ApiKeyAuth: []
tags:
- name: EVM
  description: Standard Ethereum JSON-RPC envelope shared by every EVM chain.
paths:
  /:
    post:
      summary: Ankr Execute JSON-RPC Call
      description: 'Execute a JSON-RPC 2.0 call against the selected chain. The `method` field

        carries the EVM method name (`eth_blockNumber`, `eth_getBalance`,

        `eth_chainId`, `eth_call`, `eth_getLogs`, `eth_getTransactionByHash`,

        `eth_getTransactionReceipt`, `eth_sendRawTransaction`, etc.).

        '
      operationId: callRpc
      tags:
      - EVM
      requestBody:
        required: true
        content:
          application/json:
            schema:
              oneOf:
              - $ref: '#/components/schemas/JsonRpcRequest'
              - type: array
                items:
                  $ref: '#/components/schemas/JsonRpcRequest'
      responses:
        '200':
          description: JSON-RPC response (single or batched).
          content:
            application/json:
              schema:
                oneOf:
                - $ref: '#/components/schemas/JsonRpcResponse'
                - type: array
                  items:
                    $ref: '#/components/schemas/JsonRpcResponse'
        '429':
          description: Rate limit exceeded. Premium API keys raise the limit x50.
        4XX:
          $ref: '#/components/responses/ErrorResponse'
components:
  schemas:
    JsonRpcResponse:
      type: object
      properties:
        jsonrpc:
          type: string
        id:
          oneOf:
          - type: integer
          - type: string
        result: {}
        error:
          $ref: '#/components/schemas/JsonRpcError'
    JsonRpcError:
      type: object
      properties:
        code:
          type: integer
        message:
          type: string
        data: {}
    JsonRpcRequest:
      type: object
      required:
      - jsonrpc
      - method
      - id
      properties:
        jsonrpc:
          type: string
          default: '2.0'
        id:
          oneOf:
          - type: integer
          - type: string
        method:
          type: string
          example: eth_blockNumber
        params:
          type: array
          items: {}
  responses:
    ErrorResponse:
      description: JSON-RPC error envelope.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/JsonRpcResponse'
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: query
      name: API_KEY
      description: Premium Plan API key passed as the trailing path segment.