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MPP — Machine Payments Protocol

MPP (Machine Payments Protocol) is the open standard for machine-to-machine payments via HTTP 402.

For agents: Open standard for machine-to-machine payments via HTTP 402, with quickstart, governance and FAQ docs for paywalling APIs and connecting agents.

machine-paymentshttp-402stablecoinsagent-paymentsapi-monetization

Their llms.txt

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# MPP — Machine Payments Protocol

MPP (Machine Payments Protocol) is the open standard for machine-to-machine payments via HTTP 402.

## Quickstart

- [What is MPP? Machine-to-machine HTTP 402 payments](/overview.md): MPP standardizes HTTP 402 for machine-to-machine payments. Learn how agents, apps, and...
- [Governance](/governance.md): An overview of how the Machine Payments Protocol is developed, maintained, and extended
- [Frequently asked questions](/faq.md): Answers to common questions about MPP—payment methods, settlement, pricing, security, a...
- [Quickstart](/quickstart.md): Get started with MPP in minutes. Protect your API with payments, connect your agent, or...
- [Add payments to your API](/quickstart/server.md): Add payment-gated access to your API with mppx. Accept stablecoins, cards, and Bitcoin...
- [Use with agents](/quickstart/agent.md): Connect your coding agent to MPP-enabled services. Set up a wallet to handle payment fl...
- [Use with your app](/quickstart/client.md): Handle payment-gated resources in your app. Use the mppx client SDK to intercept 402 re...
- [Machine Payments Protocol](/index.md): Charge for API requests, tool calls, and content with HTTP 402 payments co-developed by...

## Guides

- [Build with an LLM](/guides/building-with-an-llm.md): Use llms-full.txt to give your agent complete MPP context.
- [Accept one-time payments](/guides/one-time-payments.md): Charge per API call with MPP. Accept pay-per-request payments from agents, apps, and us...
- [Accept pay-as-you-go payments](/guides/pay-as-you-go.md): Build a payment-gated API with session-based billing using mppx payment channels. Charg...
- [Accept streamed payments](/guides/streamed-payments.md): Accept streamed payments over Server-Sent Events with mppx. Bill per token in real time...
- [Create and manage subscriptions](/guides/subscription-payments.md): Build a subscription-gated API with MPP. Let clients authorize recurring stablecoin pay...
- [Use MPP with x402](/guides/use-mpp-with-x402.md): Keep your x402 server or use mppx to serve native MPP and x402 clients from the same en...
- [Managing agent spend](/guides/managing-agent-spend.md): Manage agent spend with MPP.
- [Accept card payments](/guides/accept-card-payments.md): Accept card payments with Stripe on your MPP-enabled API. Charge Visa, Mastercard, and...
- [Accept split payments](/guides/split-payments.md): Split a single charge across multiple recipients in one atomic transaction. Route platf...
- [Accept multiple payment methods](/guides/multiple-payment-methods.md): Accept Tempo stablecoins, Stripe cards, and Lightning Bitcoin on a single API endpoint....
- [Create a payment link](/guides/payment-links.md): Create a payment link for any API endpoint. Share it anywhere—users pay directly from t...
- [Monetize your MCP server](/guides/monetize-mcp-server.md): Add payments to your MCP server. Charge per tool call with stablecoins—no API keys or b...
- [Add payments to WebMCP tools](/guid
…

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