TypeScript Interface for Machine Payments Protocol

A universal framework designed to allow agents and other utilities to transparently make machine payments using web infrastructure.

Accounts SDK for Apps and Wallets building on Tempo.

Agentic finance infrastructure.

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

Remlo — Borderless payroll and agent-payment infrastructure. Tempo MPP + Solana/Base x402, Bridge fiat rails, ERC-8004/SAS reputation.

Opinionated server framework for building x402/MPP-compatible APIs

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.

Official TypeScript/Node.js SDKs for the InFlow payments platform - x402 and MPP (Machine Payments Protocol) integration for sellers and buyers.

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.

A wallet for your agents to onboard and pay. Agentic MPP / x402 payments from your machine - CLI + MCP server.

Unified payment execution layer for Stellar x402, MPP charge, MPP session behind one client.pay() call

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.

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.

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.

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

Solana SPL token payments for the Machine Payments Protocol (MPP) via HTTP 402.

A paywalled lorem ipsum API that supports x402 and MPP

HERALD is an open-source CLI that emits the standard discovery files agents need to read your site and discover its agent-interaction capabilitie. One config object drives all of it. Each file is an independent open standard; pick the layers you want and HERALD generates only those.