aid: optimistic-etherscan
name: Optimism Etherscan
description: >-
  Optimism Etherscan is the official blockchain explorer and API platform for the Optimism L2 network
  (OP Mainnet, chain ID 10). It provides REST APIs for querying Optimism transactions, token events,
  smart contract source code, account balances, block data, and OP Mainnet statistics. API subscriptions
  have migrated to Etherscan API V2, enabling a single API key to access Optimism alongside 60+ EVM
  chains. The free tier covers select chains with 3 calls/second and 100,000 calls/day; paid plans
  start at $49/month for full multichain access.
url: https://raw.githubusercontent.com/api-evangelist/optimistic-etherscan/refs/heads/main/apis.yml
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
type: Index
position: Consumer
access: 3rd-Party
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
tags:
  - Blockchain
  - Optimism
  - Layer 2
  - Ethereum
  - EVM
  - Web3
  - Cryptocurrency
apis:
  - aid: optimistic-etherscan:optimistic-etherscan
    name: Optimism Etherscan API
    description: >-
      The Optimism Etherscan API provides developer access to OP Mainnet blockchain data via REST
      endpoints. Modules cover accounts (balances, transaction lists, token transfers), contracts
      (ABI, source code, verification), transactions (status, receipts, internal txs), blocks (rewards,
      countdowns, timestamps), tokens (ERC-20/ERC-721 balances, supply, holders), stats (OP supply,
      gas oracle, network statistics), and a Geth proxy for raw JSON-RPC calls. Use chainid=10 with
      Etherscan API V2 for unified multichain access.
    humanURL: https://docs.optimism.etherscan.io/
    baseURL: https://api-optimistic.etherscan.io/api
    tags:
      - Blockchain
      - Optimism
      - Layer 2
      - Ethereum
      - EVM
      - Transactions
      - Smart Contracts
      - Token Events
    properties:
      - url: https://docs.optimism.etherscan.io/
        type: Documentation
      - url: https://docs.optimism.etherscan.io/api-endpoints/accounts
        type: Documentation
      - url: https://docs.optimism.etherscan.io/api-endpoints/contracts
        type: Documentation
      - url: https://docs.optimism.etherscan.io/api-endpoints/stats
        type: Documentation
      - url: https://docs.optimism.etherscan.io/api-endpoints/stats-1
        type: Documentation
      - url: https://docs.optimism.etherscan.io/api-endpoints/tokens
        type: Documentation
      - url: https://docs.optimism.etherscan.io/api-endpoints/blocks
        type: Documentation
      - url: https://docs.optimism.etherscan.io/api-endpoints/geth-parity-proxy
        type: Documentation
      - url: https://docs.optimism.etherscan.io/api-pro/api-pro-endpoints
        type: Documentation
      - url: https://etherscan.io/apis
        type: Pricing
      - url: https://optimistic.etherscan.io/myapikey
        type: SignUp
      - url: https://etherscan.io/apiterms
        type: TermsOfService
      - url: https://docs.optimism.etherscan.io/support/rate-limits
        type: RateLimits
      - url: https://raw.githubusercontent.com/api-evangelist/optimistic-etherscan/refs/heads/main/openapi/optimistic-etherscan-openapi.yml
        type: OpenAPI
      - url: https://raw.githubusercontent.com/api-evangelist/optimistic-etherscan/refs/heads/main/vocabulary/optimistic-etherscan-vocabulary.yml
        type: Vocabulary
      - url: https://raw.githubusercontent.com/api-evangelist/optimistic-etherscan/refs/heads/main/json-ld/optimistic-etherscan-context.jsonld
        type: JSONLDContext
common:
  - url: https://optimistic.etherscan.io/
    type: Portal
  - url: https://docs.optimism.etherscan.io/
    type: Documentation
  - url: https://etherscan.io/apis
    type: Pricing
  - url: https://etherscan.io/apiterms
    type: TermsOfService
  - url: https://optimistic.etherscan.io/myapikey
    type: SignUp
  - url: https://docs.optimism.etherscan.io/support/rate-limits
    type: RateLimits
  - url: https://docs.etherscan.io/llms.txt
    type: LLMsTxt
  - url: https://docs.optimism.etherscan.io/optimism-sepolia-etherscan
    type: Sandbox
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com