Optimism

aid: optimism
url: https://raw.githubusercontent.com/api-evangelist/optimism/refs/heads/main/apis.yml
name: Optimism
kind: company
description: >-
  Optimism is an Ethereum Layer 2 scaling network and the originator of the OP Stack —
  an open-source, modular rollup framework that powers OP Mainnet and a growing
  Superchain of interoperable chains (Base, Mode, Zora, Worldchain, and others).
  Developers interact via standard Ethereum JSON-RPC, the Optimism (Viem-based) SDK,
  the canonical Optimism Bridge, OP Stack operator tooling (op-geth, op-node,
  op-deployer, op-batcher, op-proposer, op-challenger), and the Superchain Registry.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Layer 2
- Ethereum
- OP Stack
- Superchain
- JSON-RPC
- Rollup
- Bridge
created: '2026-05-23'
modified: '2026-05-29'
specificationVersion: '0.19'
apis:
- aid: optimism:mainnet-rpc
  name: OP Mainnet JSON-RPC
  description: >-
    Public Ethereum JSON-RPC endpoint for OP Mainnet (chain ID 10). Supports
    standard eth_* methods plus Optimism extensions for L1 fee estimation, deposit
    tracking, and withdrawal proving. Public endpoint is rate-limited and does not
    provide WebSockets; production teams front it with Alchemy, QuickNode, Infura,
    or self-hosted op-geth + op-node.
  humanURL: https://docs.optimism.io/superchain/networks
  baseURL: https://mainnet.optimism.io
  tags:
  - JSON-RPC
  - Mainnet
  - OP Mainnet
  properties:
  - type: Documentation
    url: https://docs.optimism.io/superchain/networks
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/optimism/refs/heads/main/asyncapi/optimism-asyncapi.yml
  - url: graphql/optimism-graphql.md
    type: GraphQL
- aid: optimism:sepolia-rpc
  name: OP Sepolia JSON-RPC
  description: >-
    Public Ethereum JSON-RPC endpoint for the OP Sepolia testnet (chain ID
    11155420) used for development and integration testing.
  humanURL: https://docs.optimism.io/superchain/networks
  baseURL: https://sepolia.optimism.io
  tags:
  - JSON-RPC
  - Testnet
  - Sepolia
  properties:
  - type: Documentation
    url: https://docs.optimism.io/superchain/networks
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/optimism/refs/heads/main/asyncapi/optimism-asyncapi.yml
- aid: optimism:bridge
  name: Optimism Bridge (Standard Bridge)
  description: >-
    Canonical cross-chain bridge for depositing and withdrawing ETH and ERC-20
    tokens between Ethereum L1 and OP Mainnet, secured by the OP Stack StandardBridge
    contracts. Available as a hosted app and via the Superbridge / Brid.gg interfaces
    for the full Superchain.
  humanURL: https://app.optimism.io/bridge
  baseURL: https://app.optimism.io/bridge
  tags:
  - Bridge
  - Cross-Chain
  - Canonical
  properties:
  - type: Documentation
    url: https://docs.optimism.io/app-developers/bridging/standard-bridge
  - type: App
    url: https://app.optimism.io/bridge
- aid: optimism:op-stack
  name: OP Stack
  description: >-
    Open-source, modular Ethereum L2 rollup stack. The monorepo at
    github.com/ethereum-optimism/optimism contains op-geth (execution), op-node
    (consensus), op-batcher, op-proposer, op-challenger, op-deployer, op-validator,
    and fault-proof system used to launch and operate Superchain rollups.
  humanURL: https://stack.optimism.io
  baseURL: https://github.com/ethereum-optimism/optimism
  tags:
  - OP Stack
  - Rollup
  - Open Source
  properties:
  - type: Documentation
    url: https://docs.optimism.io/stack/getting-started
  - type: Repository
    url: https://github.com/ethereum-optimism/optimism
  - type: Specs
    url: https://specs.optimism.io
- aid: optimism:superchain-registry
  name: Superchain Registry
  description: >-
    Source-of-truth index of chains that are part of the Optimism Superchain —
    genesis files, deployment addresses, RPC endpoints, explorers, and chain
    metadata in machine-readable form.
  humanURL: https://github.com/ethereum-optimism/superchain-registry
  baseURL: https://github.com/ethereum-optimism/superchain-registry
  tags:
  - Superchain
  - Registry
  - Metadata
  properties:
  - type: Repository
    url: https://github.com/ethereum-optimism/superchain-registry
- aid: optimism:viem-sdk
  name: Optimism SDK (Viem extension)
  description: >-
    Modern Optimism SDK exposed as a Viem extension (viem/op-stack) for L1<->L2
    message tracking, deposit and withdrawal flows, fee estimation, and Superchain
    multi-chain helpers.
  humanURL: https://docs.optimism.io/app-developers/tutorials/bridging/cross-dom-solidity
  baseURL: https://viem.sh/op-stack
  tags:
  - SDK
  - TypeScript
  - Viem
  - Cross-Chain
  properties:
  - type: Documentation
    url: https://viem.sh/op-stack
- aid: optimism:supersim
  name: Supersim
  description: >-
    Local Superchain simulator that spins up multiple OP Stack chains for
    developing and testing cross-chain interop messages (CrossL2Inbox /
    L2ToL2CrossDomainMessenger) before mainnet rollout.
  humanURL: https://docs.optimism.io/stack/interop/tools/supersim
  baseURL: https://github.com/ethereum-optimism/supersim
  tags:
  - Supersim
  - Interop
  - Local Dev
  properties:
  - type: Repository
    url: https://github.com/ethereum-optimism/supersim
- aid: optimism:etherscan-explorer
  name: Optimism Etherscan
  description: >-
    Etherscan-family block explorer for OP Mainnet and OP Sepolia with REST API
    access for contracts, transactions, and addresses.
  humanURL: https://optimistic.etherscan.io
  baseURL: https://api-optimistic.etherscan.io/api
  tags:
  - Block Explorer
  - Etherscan
  - API
  properties:
  - type: Documentation
    url: https://docs.optimism.etherscan.io
  - type: Website
    url: https://optimistic.etherscan.io
- aid: optimism:blockscout-explorer
  name: Optimism Blockscout
  description: >-
    Open-source Blockscout block explorer for OP Mainnet with REST and GraphQL
    APIs.
  humanURL: https://optimism.blockscout.com
  baseURL: https://optimism.blockscout.com/api
  tags:
  - Block Explorer
  - Blockscout
  - API
  properties:
  - type: Website
    url: https://optimism.blockscout.com
common:
- type: Website
  url: https://www.optimism.io
- type: Documentation
  url: https://docs.optimism.io
- type: GitHub
  url: https://github.com/ethereum-optimism
- type: Specs
  url: https://specs.optimism.io
- type: SuperchainRegistry
  url: https://github.com/ethereum-optimism/superchain-registry
- type: Governance
  url: https://gov.optimism.io
- type: Status
  url: https://status.optimism.io
- type: Twitter
  url: https://x.com/Optimism
- type: Discord
  url: https://discord.gg/optimism
- type: Blog
  url: https://blog.oplabs.co
- type: LLMsTxt
  url: https://docs.optimism.io/llms.txt
integrations:
- name: Ethereum
- name: Base
- name: Mode
- name: Zora
- name: Worldchain
- name: Alchemy
- name: QuickNode
- name: Infura
- name: The Graph
- name: Etherscan
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com