openapi: 3.0.3
info:
  title: Arbiscan Accounts Transactions API
  description: Arbiscan is the official blockchain explorer and API platform for Arbitrum One, the leading Ethereum Layer 2 scaling network. Built on the Etherscan V2 unified platform, the Arbiscan API provides programmatic access to Arbitrum One blockchain data including account balances, transaction histories, internal transactions, ERC-20/ERC-721/ERC-1155 token transfers, smart contract verification and ABI retrieval, block rewards, event logs, and L2 network statistics such as gas prices and total supply. The chainid for Arbitrum One is 42161. A single Etherscan V2 API key works across all 60+ supported EVM networks.
  version: '2.0'
  contact:
    name: Arbiscan Support
    url: https://docs.arbiscan.io/
  termsOfService: https://arbiscan.io/apiterms
  license:
    name: Arbiscan API Terms
    url: https://arbiscan.io/apiterms
servers:
- url: https://api.etherscan.io/v2/api
  description: Etherscan unified V2 API endpoint (use chainid=42161 for Arbitrum One)
security:
- apiKeyAuth: []
tags:
- name: Transactions
  description: Transaction status, receipts, counts, and advanced filtering
paths:
  /:
    get:
      summary: Arbiscan API Endpoint
      description: All Arbiscan API calls are issued against the Etherscan V2 unified endpoint. Set chainid=42161 for Arbitrum One. The module and action parameters select the operation. An API key is required for all calls.
      operationId: arbiscanApiCall
      tags:
      - Transactions
      parameters:
      - name: chainid
        in: query
        required: true
        description: 'Numeric chain ID. Use 42161 for Arbitrum One. Other Arbitrum networks: 42170 (Arbitrum Nova), 421614 (Arbitrum Sepolia testnet).'
        schema:
          type: integer
          example: 42161
      - name: module
        in: query
        required: true
        description: 'API module name. One of: account, contract, transaction, block, logs, token, gastracker, stats.'
        schema:
          type: string
          enum:
          - account
          - contract
          - transaction
          - block
          - logs
          - token
          - gastracker
          - stats
          example: account
      - name: action
        in: query
        required: true
        description: Action within the selected module. See module-specific documentation for available actions.
        schema:
          type: string
          example: balance
      - name: address
        in: query
        required: false
        description: Arbitrum One address (checksummed or lowercase) for account or token operations.
        schema:
          type: string
          example: '0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae'
      - name: contractaddress
        in: query
        required: false
        description: Smart contract or token contract address.
        schema:
          type: string
          example: '0xff970a61a04b1ca14834a43f5de4533ebddb5cc8'
      - name: txhash
        in: query
        required: false
        description: Transaction hash for transaction-specific queries.
        schema:
          type: string
          example: '0x1e2910a262b1008d0616a0beb24c1a491d78771baa54a33e66065e03b1f46bc1'
      - name: blockno
        in: query
        required: false
        description: Block number for block-specific queries.
        schema:
          type: integer
          example: 12345678
      - name: startblock
        in: query
        required: false
        description: Starting block number for range queries (default 0).
        schema:
          type: integer
          example: 0
      - name: endblock
        in: query
        required: false
        description: Ending block number for range queries (default 99999999).
        schema:
          type: integer
          example: 99999999
      - name: page
        in: query
        required: false
        description: Page number for paginated results (default 1).
        schema:
          type: integer
          example: 1
      - name: offset
        in: query
        required: false
        description: Number of results per page (max 10000, default 10).
        schema:
          type: integer
          example: 10
      - name: sort
        in: query
        required: false
        description: Sort order for results.
        schema:
          type: string
          enum:
          - asc
          - desc
          example: asc
      - name: tag
        in: query
        required: false
        description: Block tag (latest, earliest, pending) or hex block number for balance queries.
        schema:
          type: string
          example: latest
      - name: topic0
        in: query
        required: false
        description: Keccak-256 hash of the event signature for log filtering.
        schema:
          type: string
      - name: topic1
        in: query
        required: false
        description: Second event topic for log filtering.
        schema:
          type: string
      - name: topic0_1_opr
        in: query
        required: false
        description: Operator between topic0 and topic1 (and or or).
        schema:
          type: string
          enum:
          - and
          - or
      - name: fromBlock
        in: query
        required: false
        description: Starting block for log queries.
        schema:
          type: integer
      - name: toBlock
        in: query
        required: false
        description: Ending block for log queries.
        schema:
          type: integer
      - name: timestamp
        in: query
        required: false
        description: Unix timestamp for block-by-timestamp queries.
        schema:
          type: integer
      - name: closest
        in: query
        required: false
        description: Direction to find closest block to timestamp (before or after).
        schema:
          type: string
          enum:
          - before
          - after
      - name: boolean
        in: query
        required: false
        description: Boolean value for proxy-verification queries (true or false).
        schema:
          type: string
          enum:
          - 'true'
          - 'false'
      - name: apikey
        in: query
        required: true
        description: Your Etherscan/Arbiscan API key from https://arbiscan.io/myapikey
        schema:
          type: string
          example: YourApiKeyToken
      responses:
        '200':
          description: Successful response. The result field contains module-specific payload.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiResponse'
              examples:
                balance:
                  summary: Native ETH balance response
                  value:
                    status: '1'
                    message: OK
                    result: '2483689898977207'
                txlist:
                  summary: Transaction list response
                  value:
                    status: '1'
                    message: OK
                    result:
                    - blockNumber: '12345678'
                      timeStamp: '1620000000'
                      hash: '0x1e2910a262b1008d0616a0beb24c1a491d78771baa54a33e66065e03b1f46bc1'
                      nonce: '0'
                      blockHash: '0xabc123'
                      transactionIndex: '0'
                      from: '0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae'
                      to: '0xff970a61a04b1ca14834a43f5de4533ebddb5cc8'
                      value: '1000000000000000000'
                      gas: '21000'
                      gasPrice: '100000000'
                      isError: '0'
                      txreceipt_status: '1'
                      input: 0x
                      contractAddress: ''
                      cumulativeGasUsed: '21000'
                      gasUsed: '21000'
                      confirmations: '1000'
                gasOracle:
                  summary: Gas oracle response
                  value:
                    status: '1'
                    message: OK
                    result:
                      SafeGasPrice: '0.01'
                      ProposeGasPrice: '0.01'
                      FastGasPrice: '0.01'
                      LastBlock: '12345678'
                      suggestBaseFee: '0.01'
                      gasUsedRatio: 0.5,0.4,0.6
        '400':
          description: Invalid request — missing or malformed parameters.
        '401':
          description: Missing or invalid API key.
        '429':
          description: Rate limit exceeded. Free tier allows 3 req/s and 100,000 calls/day.
        '500':
          description: Internal server error.
components:
  schemas:
    ApiResponse:
      type: object
      description: Standard Arbiscan/Etherscan V2 API response envelope.
      properties:
        status:
          type: string
          description: '"1" indicates success; "0" indicates an error or no results.'
          example: '1'
        message:
          type: string
          description: Human-readable status message (OK, NOTOK, No transactions found, etc.).
          example: OK
        result:
          description: Module-specific response payload. May be a string (for single-value results like balances), an array of objects (for lists), or an object (for gas oracle, contract source, etc.).
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: query
      name: apikey
      description: Etherscan V2 API key from https://arbiscan.io/myapikey