x402 tooling for Base — the home network of the protocol.
Base, Coinbase’s Ethereum L2, is where x402 originated and where most of the early tooling targets first. Low fees and EVM compatibility make it the default network for accepting USDC payments from AI agents, and Base Sepolia is the standard testnet for trying the flow for free.
These are the Base-focused x402 and agent-payment projects in the directory, ranked by popularity.
Real projects from the directory · stars live from GitHub · sorted by popularity. Showing the top 60 of 157.
Client SDK, Claude plugin and skill framework for the Pinion protocol. x402 micropayments on Base.
Building blocks for Agentic payments (x402, MPP, AP2) for TypeScript, Rust, Go, Python, Ruby, PHP, Lua, Kotlin and Swift.
Building blocks for Agentic payments (x402, MPP, AP2) for TypeScript, Rust, Go, Python, Ruby, PHP, Lua, Kotlin and Swift.
Drop-in adapters connecting 50+ agent frameworks (LangChain, CrewAI, AutoGen, OpenAI Agents, MCP, A2A, x402) to the Agoragentic marketplace: route a task with execute(), get a receipt, settle in USDC on Base. Monorepo + npm packages for MCP, Micro ECF, and local readiness tooling.
A wallet for agents. Make payments via x402, use stablecoins, swap assets, earn yield with defi and buy tokenized stocks across the most popular chains.
Developer integration tools for adding TDM payments to AI agents, apps, and workflows. CLI, MCP server, and copy-paste examples
Open contract-facing SDK for payable routes and gateway-backed integrations. Thin public surface for authorize, checkout, and session flows.
Developer integration tools for adding TDM payments to AI agents, apps, and workflows. CLI, MCP server, and copy-paste examples
x402-exec is a programmable settlement framework for x402 protocol, combining payment verification, Hook-based business logic, and facilitator incentives in atomic transactions.
Remlo — Borderless payroll and agent-payment infrastructure. Tempo MPP + Solana/Base x402, Bridge fiat rails, ERC-8004/SAS reputation.
Off-chain credit ledger + hire marketplace for AI agents. Ed25519-signed envelopes, atomic settlement, hire-and-release escrow. https://voidly.ai/pay
Agent-first Remote MCP for X (Twitter) batch crawling with x402 USDC top-up (Base/Solana). Includes OpenAPI + copy-paste ADK/curl E2E examples.
MCP server for Bloomfilter, a domain registration service for AI Agents.
curl for x402 and MPP paid APIs. CLI + MCP proxy that auto-pays any endpoint on Base, Solana, and Tempo. Zero crypto code on the buyer side.
Universal MCP gateway for AI agents — 1108 tools, 307 providers. One endpoint (https://apibase.pro/mcp), pay-per-call with x402 USDC on Base + MPP USDC on Tempo.
ARCHIVED (read-only). Canonical source moved to github.com/mapleleaflatte03/meridian
Korean resources and tutorials for x402 payment protocol on Base chain
The x402 Service Encyclopedia — Every service ranked, reviewed, and documented. Community knowledge base for the AI agent economy.
Official Python SDK: Multi-agent payments, x402 Auto-Pay, and Base L2/USDC support.
AI trading brain for crypto perps — composite signals, funding rate arb scanning, and market regime detection via MCP
⚡ The gold standard for x402 resources. 300+ projects, SDKs, tools, facilitators, and ecosystem data for the HTTP 402 Payment Required protocol. Curated by 24K Labs.
Spending controls for AI agents paying online. Policy-gated x402 payments with audit log.
Trustless Agent protocol on Base. ERC-8004 identity, x402 micropayments, MCP-native, AgentKit + CDP wallets, EIP-7702, ERC-4337, ERC-4626 vault, EAS attestations, zkML-verifiable inference. Open-source MIT, real yield, fee switch live.
Local x402 payment facilitator for development and testing. Fork Base mainnet with Anvil, verify and settle x402 payments locally.
The commerce layer for the x402 agent economy — micropayments for AI agents on Base and Solana
WS402 extends the X402 protocol to WebSocket connections, enabling true pay-as-you-go pricing for streaming resources. Users pay upfront for estimated usage, the backend tracks actual consumption in real-time, and unused balance is automatically refunded when the session ends.
Self-hosted x402 payment facilitator server — verifies and settles any ERC-20 token via EIP-7702
X402 payment facilitator for AI API billing with Solana USDC and Base USDC support.
Security-first MCP skill for agent-to-agent hiring with escrowed USDC payments, x402 micropayments, and policy-gated on-chain execution
"Machines must run." — Open-source protocol & trust layer for AI agent commerce. Discover, verify, transact — no middlemen.
Original Helixa / AgentDNA / Cred implementation and reference materials. New Multipass development: github.com/Bendr-20/multipass.
The most comprehensive x402 payments skill for AI coding agents. Build paid APIs on Base & Solana with USDC. Includes Sentinel Payment Router.
Enterprise audit, compliance & budget enforcement layer for the x402 payment protocol
Enable AI agents to discover, launch tokens, pay for, and sell APIs and resources using x402
🛠 Enable seamless on-chain skill calls with automated x402 micropayments using the Pinion OS SDK and skill server framework.
One-line API monetization for AI agents. Pay-per-request USDC payments via x402. Express, Next.js, MCP.
Multi-chain AI agent economy: 5 agents across Hedera, 0G, and Base. Orchestrated by the obey daemon. Built with fest.build
MCP server for x402 Service Discovery — continuously growing catalog of services, real-time quality signals, facilitator-compat checks. For Claude, Cursor, Windsurf.
MCP server for Azeth — smart accounts, payments, reputation, and discovery tools for AI agents
Trustless escrow middleware for AI agent-to-agent transactions. Composes ERC-8004 + x402 on Base L2.
Spend controls for AI agents. Set limits, block services, audit every payment — built on x402. Open source.
A decentralized AI agent marketplace for orchestrating, verifying, and settling autonomous workflows using Chainlink CRE and x402 micropayments on Base.
MCP server for cross-chain token swaps between Solana and Base using x402 payments for fees
NodusAI is an Oracle API that produces grounded, probabilistic market signals
Open Source x402 API Router. Instantly turn any API into a USDC pay-per-request Service for AI Agents.
A lightweight x402 payment facilitator built with Hono. An educational re-implementation of the official Coinbase example.
Infrastructure primitives for autonomous agents. No signup. No GUI. No KYC. Pay with USDC, get resources.
x402 service provider tooling for Azeth — gate Hono endpoints behind x402 payments
Automatic micro-donations powered by x402. Drop-in Express/Next.js middleware that sends USDC to charities on every user action. npm install x402charity.
EOA-based Python library + CLI for testing x402 payments. Full HTTP 402 → EIP-712 sign → X-PAYMENT header flow. No CDP wallet required.
Sovereign oracle protocol — cryptographically signed data over Lightning sats (L402) and USDC on Base (x402). 11 feeds, 9 exchanges, DLC attestations, MCP server. No API keys, no accounts, no trust.
TypeScript SDK for Azeth — smart accounts, x402 payments, reputation, and service discovery
AutonomiX is a Web3 platform combining x402 micropayments and ERC-8004 agent NFTs for decentralized AI agents, on-chain reputation, and secure paywalled APIs on Base Sepolia.
Autonomous yield for AI agents on Base. 80% liquid, 20% earning. No lockup. One SDK call.
Run Claude Code and OpenAI Codex directly from a USB drive without installation, leaving no trace on the host machine.
Apollo Intelligence MCP Server — 36 AI-curated data tools via x402 micropayments. OSINT, DeFi, economic data, security, weather, ML/NLP, and proxy infrastructure. Official MCP Registry: team.apolloai/intelligence
Real-time whale intelligence for Base L2 — Flashblocks monitor + AI agent + x402 pay-per-query. Powered by OpenClaw.
We currently track 157 Base projects in the directory, drawn from open-source repositories building on x402 and agent payments. The list above is sorted by GitHub stars and updates as new projects are submitted and crawled.
x402 is an open standard for paying for an HTTP resource: a server replies with HTTP 402 and payment terms, the client pays (usually USDC), and the request is fulfilled. The Base projects above implement or build on this flow.
Submit it from the Submit page. We crawl the repository, classify it, and it appears in the relevant category pages — including this one if it matches.