name: Basescan
description: Base L2 blockchain explorer with a REST API for querying Base network transactions, token balances, smart contract ABIs, ERC-20 transfer events, gas prices, and block data. Powered by the Etherscan team and migrated to the unified Etherscan API V2 platform, enabling access to 50+ EVM chains with a single API key using chain ID 8453 for Base.
image: https://basescan.org/images/brandassets/basescan-logo-circle.png
tags:
  - blockchain
  - Base
  - L2
  - explorer
  - Ethereum
  - EVM
  - transactions
  - tokens
  - smart contracts
created: '2026-06-13'
modified: '2026-06-13'
url: https://raw.githubusercontent.com/api-evangelist/basescan/refs/heads/main/apis.yml
specificationVersion: '0.19'
apis:
  - name: Basescan API
    description: REST API for querying Base L2 blockchain data including account balances, transactions, token transfers, smart contract ABIs, gas prices, block information, and event logs. Powered by Etherscan V2 with chain ID 8453 for Base network.
    humanURL: https://docs.basescan.org
    baseURL: https://api.basescan.org/api
    tags:
      - accounts
      - transactions
      - tokens
      - contracts
      - blocks
      - gas
      - logs
    properties:
      - type: Documentation
        url: https://docs.basescan.org
      - type: OpenAPI
        url: https://raw.githubusercontent.com/api-evangelist/basescan/refs/heads/main/openapi/openapi.yml
      - type: Plans
        url: https://raw.githubusercontent.com/api-evangelist/basescan/refs/heads/main/plans/plans.yml
      - type: RateLimits
        url: https://raw.githubusercontent.com/api-evangelist/basescan/refs/heads/main/rate-limits/rate-limits.yml
      - type: FinOps
        url: https://raw.githubusercontent.com/api-evangelist/basescan/refs/heads/main/finops/finops.yml
      - type: Signup
        url: https://basescan.org/register
      - type: Login
        url: https://basescan.org/login
      - type: Keys
        url: https://basescan.org/myapikey
      - type: StatusPage
        url: https://etherscan.freshstatus.io
      - type: FAQ
        url: https://info.basescan.org
    contact:
      - FN: Basescan Support
        url: https://info.basescan.org
        email: ''
    meta:
      - name: chainId
        value: '8453'
      - name: network
        value: Base (L2)
      - name: compatibleWith
        value: Etherscan API V2
common:
  - type: Authentication
    url: https://basescan.org/myapikey
  - type: Plans
    url: https://etherscan.io/apis?id=8453
  - type: PrivacyPolicy
    url: https://etherscan.io/privacyPolicy
  - type: TermsOfService
    url: https://etherscan.io/terms
  - type: Blog
    url: https://info.basescan.org
  - type: Support
    url: https://info.basescan.org
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com