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Category · Infrastructure

Payment Infrastructure & Tooling

Facilitators, agent wallets, client libraries and metering rails.

Between "my API returns 402" and "money settled" sits real infrastructure. Facilitators verify and settle payments so your server never touches on-chain logic. Agent wallets hold funds with per-call limits and daily caps so an autonomous agent can pay safely. Client libraries and SDKs hide the handshake, and micropayment tooling meters usage down to fractions of a cent.

These categories collect the picks-and-shovels of the agent-payments stack — the projects you integrate once and build on for years.

Infrastructure categories

Facilitators 74

Services that verify and settle x402 payments for you.

Agent Wallets 76

Wallets with spending limits, built for autonomous agents.

SDKs & Clients 174

Drop-in libraries to add or consume x402 payments.

Micropayments 128

Charge cents — or fractions of a cent — per request.

Top infrastructure projects

The most-starred projects across all infrastructure categories.

The agent-native LLM router for OpenClaw. 41+ models, <1ms routing, USDC payments on Base & Solana via x402.

⭐ 6.7kTypeScript

The AI agent with a wallet — spends USDC autonomously to get real work done. Apache-2.0, TypeScript.

⭐ 624TypeScript

Daydreams is a set of tools for building agents for commerce

⭐ 611TypeScript

An open SDK for agentic payments. Let AI agents make payments, hold funds, and move money across chains with policy enforcement and human approval built in.

⭐ 526Rust

DePIN for Vintage Hardware — Proof-of-Antiquity blockchain where old machines outmine new ones. AI-powered hardware fingerprinting, 15+ CPU architectures, Solana bridge (wRTC). $0 VC.

⭐ 467Python

Golang SDK for A2A Protocol

⭐ 418Go

🚀 Curated list of x402 resources: HTTP 402 Payment Required protocol for blockchain payments, crypto micropayments, AI agents, API monetization. Includes SDKs (TypeScript, Python, Rust), examples, facilitators (Coinbase, Cloudflare), MCP integration, tutorials. Accept USDC payments with one line of code. Perfect for AI agent economy.

⭐ 260

Client SDK for the Vybe x402 API. Pay-per-call USDC over HTTP and prepaid-credit WebSocket streaming for Vybe's Solana analytics API. Built for AI agents.

⭐ 169TypeScript

Production-ready x402 facilitator server.

⭐ 148Rust

Rust SDK for the x402 payment protocol.

⭐ 148Rust

Rust SDK for the Machine Payments Protocol

⭐ 83Rust

Building blocks for Agentic payments (x402, MPP, AP2) for TypeScript, Rust, Go, Python, Ruby, PHP, Lua, Kotlin and Swift.

⭐ 67Rust