Amberdata On-Chain API

openapi: 3.2.0
info:
  title: Amberdata DeFi On Chain API
  description: Amberdata's institutional-grade digital asset and blockchain data API. Provides spot market data (prices, OHLCV, tickers, trades, order books), derivatives across futures and options (funding rates, open interest, liquidations, implied volatility, Greeks), DeFi (DEX and lending), and on-chain blockchain data (blocks, transactions, addresses, tokens). Every request requires the x-api-key header. An optional api-version header selects a dated API version.
  termsOfService: https://www.amberdata.io/terms-of-service
  contact:
    name: Amberdata Support
    url: https://www.amberdata.io/contact
  version: '1.0'
servers:
- url: https://api.amberdata.com
  description: Amberdata REST API
security:
- apiKeyAuth: []
tags:
- name: On-Chain
  description: On-chain blockchain data (blocks, transactions, addresses, tokens).
paths:
  /blockchains/{blockchainId}/blocks:
    get:
      operationId: getBlocks
      tags:
      - On-Chain
      summary: Blocks
      description: Returns block information for the specified blockchain, including block number, hash, timestamp, and aggregate metrics.
      parameters:
      - $ref: '#/components/parameters/BlockchainId'
      - $ref: '#/components/parameters/StartDate'
      - $ref: '#/components/parameters/EndDate'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiResponse'
  /blockchains/{blockchainId}/transactions:
    get:
      operationId: getTransactions
      tags:
      - On-Chain
      summary: Transactions
      description: Returns transaction data including sending and receiving addresses (with token transfers), fees (gas), amounts, op codes, block number and hash, and timestamps.
      parameters:
      - $ref: '#/components/parameters/BlockchainId'
      - $ref: '#/components/parameters/StartDate'
      - $ref: '#/components/parameters/EndDate'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiResponse'
  /blockchains/{blockchainId}/transactions/{hash}:
    get:
      operationId: getTransaction
      tags:
      - On-Chain
      summary: Transaction by hash
      description: Returns a single transaction by its hash on the specified blockchain.
      parameters:
      - $ref: '#/components/parameters/BlockchainId'
      - name: hash
        in: path
        required: true
        description: The transaction hash.
        schema:
          type: string
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiResponse'
  /blockchains/{blockchainId}/addresses/{address}/balances:
    get:
      operationId: getAddressBalances
      tags:
      - On-Chain
      summary: Address balances
      description: Returns account balance and token balances for the specified address on the given blockchain.
      parameters:
      - $ref: '#/components/parameters/BlockchainId'
      - $ref: '#/components/parameters/AddressPath'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiResponse'
  /blockchains/{blockchainId}/addresses/{address}/transactions:
    get:
      operationId: getAddressTransactions
      tags:
      - On-Chain
      summary: Address transactions
      description: Returns transactions for the specified address on the given blockchain.
      parameters:
      - $ref: '#/components/parameters/BlockchainId'
      - $ref: '#/components/parameters/AddressPath'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiResponse'
  /blockchains/{blockchainId}/tokens/{address}/information:
    get:
      operationId: getTokenInformation
      tags:
      - On-Chain
      summary: Token information
      description: Returns token information including name, symbol, contract address, decimals, total supply, and circulating supply.
      parameters:
      - $ref: '#/components/parameters/BlockchainId'
      - $ref: '#/components/parameters/AddressPath'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiResponse'
  /blockchains/{blockchainId}/tokens/{address}/transfers:
    get:
      operationId: getTokenTransfers
      tags:
      - On-Chain
      summary: Token transfers
      description: Returns token transfers including sender, receiver, amount, transaction hash, and timestamp.
      parameters:
      - $ref: '#/components/parameters/BlockchainId'
      - $ref: '#/components/parameters/AddressPath'
      - $ref: '#/components/parameters/StartDate'
      - $ref: '#/components/parameters/EndDate'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiResponse'
  /blockchains/{blockchainId}/tokens/{address}/holders:
    get:
      operationId: getTokenHolders
      tags:
      - On-Chain
      summary: Token holders
      description: Returns token holder information including the number of holders, their addresses, and tokens held by each.
      parameters:
      - $ref: '#/components/parameters/BlockchainId'
      - $ref: '#/components/parameters/AddressPath'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiResponse'
components:
  parameters:
    BlockchainId:
      name: blockchainId
      in: path
      required: true
      description: The blockchain network identifier (e.g. ethereum-mainnet, bitcoin-mainnet). Also selectable via the x-amberdata-blockchain-id header on some namespaces.
      schema:
        type: string
    StartDate:
      name: startDate
      in: query
      required: false
      description: Start of the time range (ISO 8601 timestamp or milliseconds epoch).
      schema:
        type: string
    EndDate:
      name: endDate
      in: query
      required: false
      description: End of the time range (ISO 8601 timestamp or milliseconds epoch).
      schema:
        type: string
    AddressPath:
      name: address
      in: path
      required: true
      description: The on-chain address or token contract address.
      schema:
        type: string
  schemas:
    ApiResponse:
      type: object
      description: Standard Amberdata API envelope. The requested data is returned under the payload property, alongside the HTTP status and a status message.
      properties:
        status:
          type: integer
          description: HTTP-style status code echoed in the response body.
          example: 200
        title:
          type: string
          description: Human-readable status message.
          example: OK
        description:
          type: string
          description: Additional context about the response.
        payload:
          type: object
          description: The response payload. Shape varies by endpoint; time series endpoints typically return metadata plus a data array.
          properties:
            metadata:
              type: object
              description: Metadata describing the payload (columns, request params, etc.).
            data:
              type: array
              description: The array of records for the requested resource.
              items:
                type: object
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
      description: Unique, user-specific API key. Required on every REST request via the x-api-key header.