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-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg tags: - Layer 2 - Ethereum - OP Stack - Superchain - JSON-RPC - Rollup - Bridge created: '2026-05-23' modified: '2026-05-23' 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 - 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 - 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