Reference for Agents on Base
BaseHub
Append .md to any doc URL for raw Markdown. The endpoints below are agent-targeted feeds.
/llms.txt— page index/llms-full.txt— full corpus/api/pages.json— JSON manifest- MCP server — tool-call access
/feeds/blog.xml— eng blog mirror/feeds/status.xml— network status mirror/changelog.md— changelog feed
What's new
Full changelog-
Added a Builder Codes integration guide
Builder Codes attribute onchain activity to an app, wallet, or agent through an ERC-8021 calldata suffix. The guide covers Wagmi and Viem client setup, the wallet-side dataSuffix capability, and the agent registration API.
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Added the B20 invariants and conformance tests
Thirty-six normative guarantees the precompiles hold to, plus the fifty-three scenarios that exercise them. Covers policy gating, role renunciation, supply caps, pauses, permit, and deterministic factory addresses.
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Public Base RPC endpoints are HTTP only
No WebSocket transport is offered on mainnet.base.org or sepolia.base.org, so eth_subscribe and the newHeads and logs streams are unavailable. Subscription clients need a WebSocket-capable provider.
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Deploy guide moved to Base's Foundry build
Stock forge and cast abort with call to non-contract address against Base precompiles. The guide now installs base-forge, base-cast, and base-anvil, which register those addresses.
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Node providers page retired for the Base Services Hub
Base deleted its standalone node providers page and pointed all eleven references at one directory covering RPC, explorers, wallets, and tooling. The RPC breakdown stays on BaseHub.
Introduction
Why Base, how to connect, and how to deploy your first contract.
Network
Contracts, bridges, fees, faucets, finality, and chain differences.
API reference
Every JSON-RPC method on Base, with parameters and examples.
Flashblocks
The 200ms preconfirmation protocol — overview, integration, and spec.
Run a node
Build, deploy, and operate a Base node — Docker, config, monitoring.
Architecture & crates
System design and seventy-plus Rust crates inside base/base.
Talk to Base in one line
Mainnet and Sepolia public endpoints, ready for any RPC client.
cast block-number --rpc-url https://mainnet.base.orgSubscribe to 200ms preconfirmations
WebSocket stream of mini-blocks delivered five times per slot.
wscat -c wss://mainnet.base.org/flashblocks