machine-payments-protocol

Self-hosted, non-custodial stablecoin payment gateway with x402 and invoice checkout. Accepts USDC, USDT, PYUSD and DAI across 8 networks with QR payments, payment links, settlement tracking and signed webhooks. REST API, micropayments, exports, zero platform fees and no KYC. Python, cross-platform.

The universal agent payment layer

TypeScript Interface for Machine Payments Protocol

Rust SDK for the Machine Payments Protocol

Self-hosted, non-custodial gateway between the API you already run and the protocols AI agents use to discover, call and pay for it

agent402.tools: 500+ pay-per-call tools, metered models and finished reports for AI agents, paid per call in USDC over x402 and MPP or by card. Open source, self-hostable, MCP-native. The applied layer of agentic finance.

Python SDK for the Machine Payments Protocol

The MPP registry — 100+ Machine Payments Protocol tools, SDKs, services, and payment methods across 15+ chains. The definitive directory for Stripe + Tempo agent payments.

Ruby SDK for the Machine Payments Protocol

Golang Interface for Machine Payments Protocol by cp0x

Java SDK for the Machine Payments Protocol

Canonical Swift SDK for the Machine Payments Protocol (MPP) — pay for and charge for machine-to-machine API calls over HTTP 402.

A CLI tool and web dashboard for inspecting, testing, and debugging Machine Payments Protocol flows. Think "Postman for HTTP 402" — it visualizes the full challenge-response-receipt cycle, simulates payment failures, validates receipt signatures, benchmarks session channels, and generates test reports.

FastAPI middleware for Machine Payments Protocol (MPP). Add 402 Payment Required challenges, secure sessions, and receipt validation to your APIs for AI agents.

Self-hosted machine payments gateway: charge AI agents and humans per API call with x402 and MPP protocols.

SPL Token + Pump.fun payment layer for the Machine Payments Protocol

Redotpay — independent third-party profile of a public API surface, by API Evangelist. RedotPay is a global stablecoin-based payment fintech that integrates blockchain solutions with traditional banking and finance infrastructures. The platform lets millions of people spend and send digital assets through a crypto-backed Visa card, a multi-currency

Reference implementation of the nearintents payment method for MPP (Machine Payments Protocol) — cross-chain HTTP 402 payments settled by NEAR Intents: clients pay on any supported chain, merchants receive an exact amount on theirs. Extends mppx.

One decorator to monetize any FastAPI endpoint via Tempo/MPP.

Machine Payments Protocol for Solana — specification