The settlement layer
Onchain agents for payments
Pay-per-call, agent-to-agent, settled onchain in stablecoins — no card, no checkout, no human.
32 resources · 10 chains
Payment is what turns an agent from a chatbot into an economic actor. Give it a balance, pay-per-request, and stablecoin settlement, and an agent can buy data, hire other agents, and run a paid service — with no card, no invoice, and no human approving each step.
The rails are arriving fast. x402 turns an HTTP 402 into a one-line USDC charge, while Coinbase's x402, Google's AP2, and the card networks' agent-checkout specs race to define how agents transact with merchants. We track what has shipped against what's still a draft — and never present self-reported volume as verified.
The payments stack
x402 micropayments
Pay-per-request settlement over the HTTP 402 status code — the primitive most agent payments run on.
Stablecoin rails
USDC and other stablecoins: the unit of account agents actually hold, send, and receive.
Agent-commerce standards
AP2, ACP, and checkout protocols that let agents buy from merchants and pay each other.
Escrow & settlement
Conditional release and dispute handling for agent-to-agent deals.
Payments resources
Explore in directory →GOAT SDK
ActiveCrossmint's open-source library of onchain actions (tools) for AI agents across chains.
Olas (Autonolas)
ActiveNetwork and framework for co-owned autonomous agent services operating onchain.
Zerion
ActiveWallet and DeFi data provider offering portfolio, positions, transactions, PnL, and prices across many chains, with an agent-accessible API.
Agent Payments Protocol (AP2)
ActiveOpen protocol from Google for secure agent-led payments across traditional and crypto rails, with a crypto-native x402 extension built with Coinbase, Ethereum Foundation, and MetaMask.
Agentic Commerce Protocol (ACP)
BetaOpen standard maintained by OpenAI and Stripe for connecting buyers, their AI agents, and businesses to complete purchases.
Universal Commerce Protocol (UCP)
ActiveOpen standard co-developed by Google and Shopify for AI agents to discover, negotiate, and transact with any merchant across the full commerce journey.
ERC-8183: Agentic Commerce
EarlyDraft Ethereum standard defining an on-chain job-escrow protocol with evaluator attestation so AI agents can hire, deliver, and settle work without intermediaries.
World AgentKit
BetaSDK from World (Tools for Humanity) that lets AI agents present a zero-knowledge proof a verified human authorized them, combined with x402 payments.
x402
EarlyOpen payment protocol enabling agents and apps to pay for APIs over HTTP using stablecoins.
DefiLlama
ActiveOpen DeFi analytics dashboard and free API tracking TVL, fees, revenue, volume, and yields across many chains and protocols.
Trust Wallet Agent Kit (TWAK)
ActiveNon-custodial toolkit from Trust Wallet (MCP server, CLI, and SDK) that lets AI agents read and transact across 25+ chains within user-defined rules.
Nansen
ActiveOnchain analytics platform with wallet labeling and smart-money tracking, offering an API with key-based and x402 access.
Messari
ActiveCrypto research and data platform covering fundraising, metrics, signals, and news, with API-key and x402 agent access.
Neynar
ActiveFarcaster developer platform providing APIs, SDKs, webhooks, and an agent skill for building and deploying agents that read and write Farcaster data.
Clanker
ActiveAgent that deploys tokens on Base when tagged on Farcaster.
OpenSea Agent Skill
ActiveOfficial OpenSea agent skill and MCP server letting AI agents query NFT/token data and execute marketplace operations such as listing, offers, and token swaps.
Visa Trusted Agent Protocol (TAP)
ActiveVisa protocol that lets merchants authenticate trusted AI shopping agents via cryptographic signatures, with x402 interoperability into traditional payment rails.
Chainbase
ActiveAn onchain data network providing structured, AI-ready blockchain data across many chains, with API, CLI, MCP, and x402 access.
PayAI Network
ActiveSolana-first x402 payment facilitator enabling usage-based, machine-to-machine payments for AI agents.
Pieverse
ActiveOne-click deployment of Web3-native AI agents to Line, Kakao, and WhatsApp, each with its own wallet and onchain execution.
peaq
ActiveDePIN infrastructure providing agents with identity, wallets, and pay-per-request onchain settlement, with peaqOS skills for AI coding tools.
Kobaru
ActiveAn x402 micropayment gateway and transparent proxy that adds pay-per-request paywalls to existing APIs without backend rewrites.
Cybercentry
ActivePay-per-use security verification endpoints for AI agents, billed via x402 micropayments.
PRXVT
EarlyOpen-source privacy SDK that adds unlinkable, zero-knowledge payments on top of the x402 agent payment standard.
Mode Network
ActiveAn Optimism Superchain L2 focused on AI-driven onchain finance, with configurable rules-based trading agents.
Endaoment
ActiveOn-chain US 501(c)(3) community foundation enabling donor-advised funds and crypto, stock, and cash donations to nonprofits, with an agent skill for charitable giving.
Who Pays the Agent? (Keyrock x Coinbase Report)
ActiveResearch report analyzing on-chain AI-agent payments, finding agents settled roughly $73M across about 176M transactions over twelve months with USDC dominant.
AgenC
ActiveA Solana coordination protocol and marketplace where agents claim escrowed tasks, prove completion with ZK proofs, and settle payment on-chain.
0xWork
EarlyBase-based marketplace where humans and AI agents post and complete tasks, with USDC locked in on-chain escrow, agent staking, and ERC-8004 identity/reputation.
Agently
EarlyRouting and settlement layer and CLI for agent-to-agent commerce, supporting EVM wallets, agent discovery, A2A messaging, x402 payments, and ERC-8004 identity.
Cod3x
ActiveA DeFAI platform to create no-code AI agents that translate natural-language intent into onchain DeFi strategies and trades.
Megapot
ActivePermissionless on-chain lottery on Base where players buy stablecoin tickets for provably-fair draws and liquidity providers fund jackpots.
Learn more
How Agents Use Wallets
Agent wallets are key-management systems that let an AI agent sign transactions programmatically, ideally with policies, spend limits, and approval flows that constrain what the agent can do.
What Are Onchain Agents?
Onchain agents are autonomous AI agents that can interact with blockchain systems, holding wallets, signing transactions, reading chain data, and executing workflows across protocols without constant human input.
Related use cases
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