Optimism

OP Mainnet JSON-RPC

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.

GitHub

Documentation

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Documentation
https://docs.optimism.io/superchain/networks

Specifications

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AsyncAPI
https://raw.githubusercontent.com/api-evangelist/optimism/refs/heads/main/asyncapi/optimism-asyncapi.yml

Other Resources

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GraphQL
https://raw.githubusercontent.com/api-evangelist/optimism/refs/heads/main/graphql/optimism-graphql.md

AsyncAPI Specification

optimism-asyncapi.yml Raw ↑