Onchain agents for payments

Adversarial AI agent experiment where users try to convince an agent to release onchain funds.

An autonomous AI agent with its own wallet that spends USDC to get real work done.

Open HTTP 402 payment protocol, now at the x402 Foundation: agents pay per request in stablecoins, and by a newly merged spec, in bitcoin over Lightning.

Open DeFi analytics dashboard and free API tracking TVL, fees, revenue, volume, and yields across many chains and protocols.

Embedded and server wallet infrastructure used to give agents secure key management.

Non-custodial toolkit from Trust Wallet (MCP server, CLI, and SDK) that lets AI agents read and transact across 25+ chains within user-defined rules.

Onchain analytics platform with wallet labeling and smart-money tracking, offering an API with key-based and x402 access.

Crypto research and data platform covering fundraising, metrics, signals, and news, with API-key and x402 agent access.

ARMA is Giza's autonomous agent that manages stablecoin lending positions across Base DeFi protocols on the user's behalf.

Farcaster developer platform providing APIs, SDKs, webhooks, and an agent skill for building and deploying agents that read and write Farcaster data.

Agent that deploys tokens on Base when tagged on Farcaster.

Non-custodial MPC wallet for AI agents with cryptographically enforced human rules, plus a WaaS Skill for building wallet apps via natural language.

Official OpenSea agent skill and MCP server letting AI agents query NFT/token data and execute marketplace operations such as listing, offers, and token swaps.

A platform for deploying autonomous AI trading agents on Injective with onchain identity, order-book trading, and MCP framework support.

A set of MCP-style Agent Skills that let AI agents access Binance spot, derivatives, margin, Alpha market data, and asset management via standardized APIs.

An onchain data network providing structured, AI-ready blockchain data across many chains, with API, CLI, MCP, and x402 access.

Visa protocol that lets merchants authenticate trusted AI shopping agents via cryptographic signatures, with x402 interoperability into traditional payment rails.

An ERC-8183 agent skill marketplace where builders register skills and agents discover, chain, and pay for them on-chain.

Solana-first x402 payment facilitator enabling usage-based, machine-to-machine payments for AI agents.

An installable skill and unified API giving AI agents access to crypto market, on-chain, social, and prediction-market data across 40+ chains.

One-click deployment of Web3-native AI agents to Line, Kakao, and WhatsApp, each with its own wallet and onchain execution.

DePIN infrastructure providing agents with identity, wallets, and pay-per-request onchain settlement, with peaqOS skills for AI coding tools.

Pay-per-use security verification endpoints for AI agents, billed via x402 micropayments.

An x402 micropayment gateway and transparent proxy that adds pay-per-request paywalls to existing APIs without backend rewrites.

Open-source privacy SDK that adds unlinkable, zero-knowledge payments on top of the x402 agent payment standard.

On-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.

An Optimism Superchain L2 focused on AI-driven onchain finance, with configurable rules-based trading agents.

Base-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.

A Solana coordination protocol and marketplace where agents claim escrowed tasks, prove completion with ZK proofs, and settle payment on-chain.

Lightning Labs reverse proxy that puts any HTTP or gRPC API behind L402: Lightning invoices plus macaroon credentials, answered with HTTP 402.

Research report analyzing on-chain AI-agent payments, finding agents settled roughly $73M across about 176M transactions over twelve months with USDC dominant.

Routing and settlement layer and CLI for agent-to-agent commerce, supporting EVM wallets, agent discovery, A2A messaging, x402 payments, and ERC-8004 identity.

A DeFAI platform to create no-code AI agents that translate natural-language intent into onchain DeFi strategies and trades.

Official Node.js SDK for Virtuals' Agent Commerce Protocol — event-driven agent-to-agent job and escrow flows.

Agent Control is a marketplace where agents find and pay for services on Base, Solana.

TypeScript and Python SDKs to register an agent on ERC-8004, publish its MCP and A2A endpoints, and search for or give feedback on other agents.

One prepaid balance that lets AI agents buy data, APIs, and tools per call - no API keys, no subscriptions.

Spend-control layer for agent payments: per-agent wallets, spend limits, human approval, scoped virtual cards and an audit trail, in front of the rails you already use.

Bitcoin-native MCP server: BTC/STX wallets, L1 reads and transfers, Stacks, sBTC, and x402 payments.

Official Alby MCP connecting Bitcoin Lightning wallets to agents via Nostr Wallet Connect.

Alchemy's payment proxy for AI agents — every API request is authenticated, metered, and settled automatically, so agents pay per call without keys or subscriptions.

GoPlausible's Algorand MCP: agent wallets, transaction building/signing, TEAL, DEX aggregation, full Algod/Indexer access.

MCP server for crypto-perps research signals, funding-rate arbitrage scans, and market-regime data.

Arbitrum-native, MCP-first agent framework with A2A and x402 support, backed by an Arbitrum Foundation grant program.

Circle's EVM-compatible L1 with USDC as gas, live on mainnet since Sep 16, 2026. It is positioned for payments and agent activity, with App Kits and the Arc Studio coding agent.

Onchain intelligence API that attributes wallets to entities; agents can pay per request in USDC over x402.

Managed AWS service that lets agents pay for APIs, MCP servers and content over x402 and MPP, using Coinbase CDP or Stripe Privy wallets with per-session budgets.

Binance's official agent access layer. It pairs a hosted OAuth MCP server for spot, margin, convert and futures in a dedicated sub-account with Skills Hub and x402 tools.

Zero-config Bitcoin data MCP: fees, mempool, blocks, transactions, mining, price, and supply.

Crypto-to-gift-card and mobile top-up commerce platform with a Skills/MCP/API surface for agents to buy real-world goods with stablecoins.

Official MCP server for BlindPay's stablecoin payment rails: payouts, payins, virtual accounts, and FX quotes.

Official BlockBeats MCP: crypto newsflashes, articles, market metrics, ETF flows, and macro signals.

Pay-per-call gateway where AI agents reach 55+ LLMs, data, and tools through one endpoint, settled in USDC via x402 — no API keys.

Non-custodial wallet MCP for AI agents to invoice, get paid, and spend on other agents/APIs, with human-set limits.

GitHub App that escrows USDC on Base (or MUSD on Mezo) against an issue and pays the contributor when the closing PR merges.

Toolkit for AI agents managing Solana yield-farming positions via the Breeze protocol, in MCP, x402, and SKILL.md form.

Stablecoin payments infrastructure (acquired by Stripe) offering an orchestration, issuance, cards, and wallet API for moving money onchain.

Chainlink's hosted HTTP gateway and skill bundle: pay-per-call Data Streams prices and CRE-run onchain actions with gas covered, paid via x402 in USDC on Base.

Protocol and SDKs (Python, TypeScript) for agents that register an ERC-8004 identity and record their work for reputation, with x402 payments.

Circle's official agent toolkit: Circle CLI, policy-controlled Agent Wallets, gasless USDC Nanopayments, an x402 facilitator and an agent marketplace.

MCP wrapper around Circle's Agent Stack — create USDC wallets, set spend policies, send stablecoin, and pay x402-gated endpoints.

Circle Gateway batched settlement for gas-free USDC payments down to 0.000001 USDC, with buyer and seller SDKs for x402.

Official Circle skill repo for USDC payments, cross-chain transfers, and wallet integration.

Local LLM router for agents: routes each request to the cheapest capable model across 78 models, paid with USDC micropayments via x402 on Base or Solana.

Coinbase Developer Platform wallet infrastructure built for AI agents, with spend caps, gasless Base settlement, and native x402.

Coinbase's remote MCP server: an agent signs in with Coinbase OAuth to trade crypto, US stocks/ETFs and futures, and pay for data over x402.

Public, keyless catalog of x402 payment-gated services indexed by the CDP facilitator, searchable by intent via REST, TypeScript SDK or a hosted MCP server.

npx CLI that scaffolds an ERC-8004 agent project with A2A and MCP servers and optional x402 payments, for EVM chains and Solana.

Wallet, stablecoin and card infrastructure for developers, with agent payment products across many blockchains through one API.

Solana DEX smart-money signal MCP server (whale accumulation, divergence, BTC regime) sold pay-per-call via x402.

Official CryptoQuant MCP server exposing on-chain metrics like MVRV, SOPR, and exchange flows to agents.

Pay-per-article access to 100+ paywalled financial newsletters and podcasts, plus a structured stock-picks feed, over x402 or MCP.

Web search and content-retrieval API built for AI; /search and /contents can be paid per request over x402.

L402 payments platform and MCP server letting agents pay for API access with Bitcoin Lightning or stablecoins.

Onchain market metrics (MVRV, exchange flows, supply distribution) sold per call over x402, no API key.

MCP server for Gloria AI's curated crypto news feed — sentiment-tagged headlines, recaps, and search for agents.

Hashgraph Online MCP for agent discovery, chat, registration, workflows, and Hedera agent interactions.

Lightning Labs toolkit giving LangChain agents Bitcoin/Lightning balance access and L402-authenticated API calls.

Stablecoin-to-real-world spending for agents: prepaid and gift cards, Venmo/PayPal/ACH payouts. Callable via x402 (USDC on Base/Solana) or MCP.

Lightning Labs' agent toolkit: 7 skills + MCP server to run an lnd node, pay L402 APIs (lnget), host paid endpoints (aperture), scope keys.

Bitcoin Lightning wallet MCP and CLI for agent payments: invoices, sends, and L402 support.

Open-source MCP server for the LNbits Lightning accounts system: wallet balances, payments, and admin tools.

Trading-intelligence API for Robinhood Chain and Solana (KOL trades, DEX tape, deployer reputation) with MCP, SDKs, ElizaOS plugin and x402 pay-per-call.

US stock market data API (formerly Polygon.io); agents buy it per request over x402 at agent.massive.com with no account.

Cardano-based payment and identity protocol letting AI agents pay each other via escrow with on-chain audit trails.

Real-time Ethereum L2 (~10ms blocks) with a native agent stack: the MOSS embedded wallet lets agents act under scoped, revocable permission policies — spend caps, contract allowlists, and expiry — without ever touching your keys.

Permissionless on-chain lottery on Base where players buy stablecoin tickets for provably-fair draws and liquidity providers fund jackpots.

Pay-per-call MCP server (x402, USDC on Base) offering keyless web-read, structured extraction, and markdown tools with signed provenance receipts.

USDC bounties on GitHub issues, paid when a PR merges, with GitHub's signature checked by a contract on Arc.

TRON infrastructure MCP (hosted SSE + local stdio): energy/bandwidth prices, resource optimization, and TRC-20 stablecoin payments.

MetaMask's own MCP server for generating x402 payment headers signed by a supplied private key.

minia2a is a marketplace where agents find and pay for services on Base.

One-line x402 paywall SDK for monetizing APIs and MCP servers with per-route USDC pricing.

Official MoonPay skill repo for crypto onramps, wallet ops, swaps, and prediction-market trading.

Official Machine Payments Protocol catalog of payment-enabled services, with a web directory, JSON API and read-only MCP server.

Ecosystem explorer for the Machine Payments Protocol (MPP) on Tempo: agent payment servers, micropayments, and volume.

MCP server for perp funding rates and cross-exchange data across 20+ venues, including Hyperliquid HIP-3.

NanoParse is an MCP server on Base.

Official NEAR AI marketplace where agents bid on posted tasks and get paid in NEAR via NEAR Intents.

Cross-chain swap/settlement API solved by the NEAR Intents solver network; also an MPP payment method so agents pay 402s from any chain.

Neuronto Payments is an API and SDK.

TypeScript SDK to put a payment plan in front of an agent: credit or time-based plans, x402 access tokens, and A2A and MCP integrations.

Open-source AI trading terminal: an LLM drives strategy inside hard-coded risk limits across 9 exchanges. Model usage can be paid via x402 USDC on Base.

Official Octav MCP exposing portfolio holdings, DeFi positions, NAV, and transaction history across 20+ chains.

Ogena token risk is a data service for agents on Solana, Base.

Agent-native blockchain data API: single-purpose REST 'Skills', an MCP server (@one-source/mcp) and an M10 natural-language layer, paid per call via x402 or a $20/mo key.

Agent middleware (npm/MCP) that discovers, prices, and pays for paid APIs with multi-chain USDC, tracking 21,000+ endpoints.

Wallet infrastructure with agentic backend wallets bound by signing policies, a Node SDK, a CLI, and MCP servers for its docs and CLI.

Network and Python SDK for verifiable AI inference, a model hub and LLM calls paid through x402.

One gateway for agents to discover, call and pay for 800+ API endpoints from 50+ providers. Pay per call via x402, MPP or Circle Nanopayments.

PayRam's MCP server for self-hosted crypto payments: hosted endpoints and agent payment workflows.

Official Polygon Labs CLI giving AI agents session-scoped wallets, x402 payments, and ERC-8004 identity in one install.

PulseFeed checks an x402 endpoint before an agent pays it (liveness, a 0-100 score, receiver and price flags) and tracks changes to MCP servers and npm packages. Ships a guard SDK, an MCP server, and Vercel AI SDK and LangChain tools.

Gasless stablecoin payment relay and managed Agent Wallets across 12 EVM chains (EIP-712 + EIP-7702), with an MCP server and optional ERC-8004 registration on BNB Chain.

Official remote MCP for managing QuickNode blockchain endpoints, rate limits, security, and billing via natural language.

Policy and audit layer for agent-initiated business payments, with an SDK, a CLI and MCP support over bank, card and stablecoin rails.

Robinhood's permissionless Arbitrum-stack L2 (chain ID 4663), on mainnet since 1 July 2026, built for tokenized equities and 24/7 onchain markets.

MIT stdio MCP server for Robinhood Chain: 105 read/build tools (RPC, precompiles, Stock Tokens, Uniswap v4, Chainlink, x402 helpers). Never signs.

Open-source kit that gives an always-on agent (built for Grok Bot) its own Base and Solana wallet, with spending limits its owner sets and Sato Hub checks before it spends.

Skim is a data service for agents on Base.

Identity and payment layer for agents: KYAPay tokens carry an agent's identity and a USDC-backed payment commitment, with a hosted MCP server.

Solana Foundation community registry of stablecoin-gated (USDC/USDT) APIs the pay CLI and AI agents can search, route to, and pay through.

MCP server bridging AI assistants to the x402 micropayment protocol on Solana, so agents can discover and pay for services in USDC.

Official Sperax MCP for USDs/SPA protocol data: peg health, collateral, yield strategies, and vault risk on Arbitrum and BNB Chain.

REST API suite (accounts, cards, yield, trading data) for building stablecoin-native fintech on Solana, from the Squads Labs team.

Stripe's merchant-side agent payments: charge agents per call over MPP (cards via SPTs, USDC on Tempo and Solana) or x402 (USDC on Base), settled to your Stripe balance.

Real-time token-streaming protocol enabling per-second payment flows, usable as an agent subscription/payroll primitive.

Agent-to-agent hiring network with escrowed payments (AP2), a SwarmScore reputation figure and a published OpenAPI spec.

Purpose-built blockchain for stablecoin payments, with docs, SDKs, a docs MCP server and Machine Payments (MPP) support for agents.

Specification for the Payment HTTP auth scheme (Machine Payments Protocol) from Tempo, the Stripe/Paradigm-backed payments L1.

Read-only Base mainnet MCP for x402: verify USDC settlements, parse x402 manifests, probe endpoints, decode payment payloads.

Marketplace where AI agents hire agents: on-chain .agent identities (ERC-8004), escrowed jobs and quotes, settlement in USDC/USDT on BNB Chain and Base.

Pay-per-query access to subgraphs on The Graph Network over x402, paid in USDC on Base with no API key.

Official Uniswap skill repo: swap, liquidity, and v4 hook tooling for AI trading agents.

Plugin-based monorepo MCP: EVM+Solana wallets, DEX aggregation, x402 payments, CEX trading, market data, bridges.

Privacy-preserving x402 payments for agents on Base, with stealth addresses and TEE-encrypted inference, no accounts or API keys.

Vercel Labs' reference Next.js template wiring the x402 payment protocol into the AI SDK and MCP for paying agents.

x402 Bazaar Rank is a data service for agents on Base, Arbitrum, Polygon.

x402-ping is a API and SDK on Base.

Read-only checks for x402 sellers: probes a live endpoint's HTTP 402 payment challenge, discovery metadata and schemas, without a wallet or a test payment.

CLI and MCP proxy that auto-pays x402/MPP-gated endpoints on Base, Solana, Monad, and Tempo from one mnemonic.

MCP server that discovers x402-paid APIs via CDP Bazaar and handles USDC micropayments on Base.

Explorer for the x402 ecosystem: transactions, sellers, origins, and resources across agentic commerce.

Ripple's starter kit for building agentic payment apps on the XRP Ledger, with x402 payments in XRP and RLUSD, an XRPL docs MCP server, and Claude wallet/payment skills.

Non-custodial onchain yield API for agents: discover, assess, enter and exit 3,300+ staking/lending/RWA yields over one MCP server, paid per call via x402.

Non-custodial ERC-4626 yield optimizer on Base and Ethereum; agents deposit stablecoins into yoUSD to earn aggregated DeFi yield.

Web Search and Finance Research APIs that agents can call with no key and pay per request in USDC over x402.

An autonomous agent/builder on Base publishing open-source crypto agent skills such as calldata decoding, proxy resolution, and protocol integrations.

Toolkit giving AI agents gasless access to crypto wallets and onchain functionality.

Gives any AI agent a crypto wallet to pay x402 APIs, receive USDC, and check balances.

Multi-tenant x402 facilitator for Lightning built on Nostr Wallet Connect. Predates the merged lnbtc spec and still advertises bip122.

Agent skill for Bitget Wallet: token swaps, cross-chain bridging, and gasless transactions.

MCP server giving AI agents live data — markets, crypto, research, X — billed per call via x402 micropayments.

Web3 toolkit for Claude Code: 140 custody-free MCP tools for EVM and Solana DeFi, DEX, and perps.

Framework and tooling for building AI agents for onchain commerce.

Skill collection for EmblemAI agents — 200+ crypto tools across seven blockchains.

A small mainnet service paid with x402 over Lightning (lnbtc): digits of pi for 100 sats, with an agent SKILL.md and a Rust client.

Commerce SDK for bootstrapping AI agents that can pay, sell, and transact onchain.

Agent skills for OKX OnchainOS: wallet, token discovery, market data, and DEX swaps.

DeFi toolkit that gives AI agents and coding assistants wallets to deposit funds, execute trades, and manage crypto.

Wallet-as-a-Service infrastructure for AI agents.

Drop-in OpenAI Python client with transparent x402 micropayment support.