The Machine Payments Protocol (MPP) is an open standard for autonomous machine-to-machine and agent-to-agent payments. It defines how one agent discovers a price, authorizes a payment, and settles it programmatically — no human in the loop — so services can charge AI agents directly. MPP sits alongside x402, A2A and AP2 in the emerging agentic-payments stack.
Protocol · MPP
Machine Payments Protocol
142
MPP projects
151
most-starred
MPP projects, ranked
Live from the directory · sorted by GitHub stars. Showing the top 40 of 142.
Alephant is an open-source AI Agent Gateway for routing, tracking, and controlling LLM usage across AI agents, members, and workflows, and for publishing agent capabilities as paid endpoints with x402 and MPP payment rails.
⭐ 107Rust
Specifications for the Machine Payments Protocol - powered by the "Payment" HTTP authentication scheme
⭐ 85Python
A universal framework designed to allow agents and other utilities to transparently make machine payments using web infrastructure.
⭐ 68TypeScript
Building blocks for Agentic payments (x402, MPP, AP2) for TypeScript, Rust, Go, Python, Ruby, PHP, Lua, Kotlin and Swift.
⭐ 67Rust
Building blocks for Agentic payments (x402, MPP, AP2) for TypeScript, Rust, Go, Python, Ruby, PHP, Lua, Kotlin and Swift.
⭐ 67Rust
#10 tempoxyz/wallet
Command-line wallet and HTTP client for the Tempo blockchain, with built-in Machine Payments Protocol support.
⭐ 45Rust
Skills & plugins for agentic commerce : UCP, ACP, AP2, A2A, WebMCP, Magento 2, BigCommerce, WooCommerce
⭐ 34Python
The neutral micropayment router for autonomous agents. A single HTTP client that intercepts '402 Payment Required', routes across x402, L402, and MPP, persists credentials as recoverable assets, enforces per-envelope budgets, and emits a structured trace.
⭐ 31Python
The MPP registry — 100+ Machine Payments Protocol tools, SDKs, services, and payment methods across 15+ chains. The definitive directory for Stripe + Tempo agent payments.
⭐ 18TypeScript
Train nanoGPT on Modal GPUs, paid with stablecoins via MPP. No API keys. No signup. Just HTTP 402.
⭐ 14Python
#18 winsznx/remlo
Remlo — Borderless payroll and agent-payment infrastructure. Tempo MPP + Solana/Base x402, Bridge fiat rails, ERC-8004/SAS reputation.
⭐ 13TypeScript
🚀 Curated resources for Google's Agent Payments Protocol (AP2), A2A & x402 — blogs, videos, repos & specs. Contributions welcome!
⭐ 12HTML
#21 kartojal/openvps
MPP-powered VPS hosting - AI agents pay for compute via Machine Payments Protocol
⭐ 11Rust
Official TypeScript/Node.js SDKs for the InFlow payments platform - x402 and MPP (Machine Payments Protocol) integration for sellers and buyers.
⭐ 9TypeScript
A wallet for your agents to onboard and pay. Agentic MPP / x402 payments from your machine - CLI + MCP server.
⭐ 9TypeScript
A neutral landscape analysis of AI agent payment protocols (x402, MPP, L402, Google AP2, Visa TAP + ICC, Mastercard Agent Pay, Amex ACE, Google/Shopify UCP, OpenAI ACP, and others). Maintained by Genesis Software Group, Copenhagen. Updated April 2026. CC BY 4.0.
⭐ 9
A curated list of awesome Agentic commerce, Universal Commerce Protocol (UCP), Agentic payments protocol (AP2) resources, tools, and implementations.
⭐ 9
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.
⭐ 9TypeScript
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.
⭐ 9TypeScript
Canonical Swift SDK for the Machine Payments Protocol (MPP) — pay for and charge for machine-to-machine API calls over HTTP 402.
⭐ 7Swift
Unified payment execution layer for Stellar x402, MPP charge, MPP session behind one client.pay() call
⭐ 6TypeScript
#31 mbeato/APIMesh
APIMesh — 23 pay-per-call web analysis APIs + 16-tool MCP server with autonomous API generation. Security audits, SEO, tech stack detection. x402 + Stripe MPP payments.
⭐ 6TypeScript
The x402 Service Encyclopedia — Every service ranked, reviewed, and documented. Community knowledge base for the AI agent economy.
⭐ 6HTML
Real-time NYC transit API for AI agents. Citi Bike, subway, bus ETAs in one API — $0.02/check via x402 or MPP. Verifiably deployed on EigenCloud.
⭐ 6HTML
#35 mbeato/conway
APIMesh — 23 pay-per-call web analysis APIs + 16-tool MCP server with autonomous API generation. Security audits, SEO, tech stack detection. x402 + Stripe MPP payments.
⭐ 6TypeScript
Payment infrastructure for AI agents. Reference implementation: x402 + MPP + fiat.
⭐ 5JavaScript
Build paid APIs, agents, tools & data feeds on the DNA x402 hosted rail. Templates, Degen Mode, no backend custody. Public Beta.
⭐ 5TypeScript
Production-grade ZK compliance for AI agent payments on Solana. Real Circom Groth16 proofs gate spending limits, sanctions, and time rules without leaking payment details. Two rails: HTTP 402 (USDC/USDT/aUSDC) and Stripe MPP, both with on-chain attestation.
⭐ 5TypeScript
Machine Payments Protocol integration for OpenClaw — one wallet, every AI service, no API keys
⭐ 5TypeScript
A reverse proxy that wraps any existing HTTP API with MPP payment gating — zero code changes on the origin API.
⭐ 4TypeScript
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Frequently asked questions
What is Machine Payments Protocol?
The Machine Payments Protocol (MPP) is an open standard for autonomous machine-to-machine and agent-to-agent payments. It defines how one agent discovers a price, authorizes a payment, and settles it programmatically — no human in the loop — so services can charge AI agents directly. MPP sits alongside x402, A2A and AP2 in the emerging agentic-payments stack.
How many MPP projects are there?
We track 142 open-source MPP projects, generated live from our ecosystem dataset and ranked by GitHub stars.
Where does MPP fit among agent payment protocols?
MPP is one of several standards in the agentic-payments stack (x402, MPP, A2A, AP2, ACP, L402, MCP). See our agent payment protocols overview for a side-by-side comparison.