The universal agent payment layer
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Updated
Aug 4, 2026 - TypeScript
The universal agent payment layer
TypeScript Interface for Machine Payments Protocol
Rust SDK for the Machine Payments Protocol
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
Agent402: 500+ pay-per-call tools for AI agents over x402 + MPP (USDC on 12 rails, native Tempo, free via PoW, or prepaid card credits), cited reports + monitors people buy by card, the open x402 + MPP index, Smart Order Router, on-chain leaderboard, and the tollbooth. Open source, self-hostable, MCP-native. The applied layer of agentic finance.
Canonical Swift SDK for the Machine Payments Protocol (MPP) — pay for and charge for machine-to-machine API calls over HTTP 402.
Java SDK for the Machine Payments Protocol
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.
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.
Secure FastAPI with Machine Payments Protocol middleware for receipt validation, replay protection, session binding, and Redis-backed storage
Python scripts and examples for Tempo blockchain — pytempo SDK, MPP payments, testnet utilities
One decorator to monetize any FastAPI endpoint via Tempo/MPP.
Machine Payments Protocol for Solana — specification
HTTP middleware emitting MPP 402 challenges and verifying Solana payments. Hono adapter included.
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