Optimism Etherscan

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-images.s3.amazonaws.com/shared/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: LlmsText
- url: https://docs.optimism.etherscan.io/optimism-sepolia-etherscan
  type: Sandbox
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com