{
  "id": "machine-payments-protocol",
  "name": "Machine Payments Protocol (MPP)",
  "category": "finance-payments",
  "summary": "Open standard for machine-to-machine payments over HTTP 402, co-developed by Tempo and Stripe; charge per API request, tool call or content.",
  "description": "Challenge/Credential/Receipt flow with HTTP, MCP/JSON-RPC and WebSocket transports; charge, session (metered) and subscription intents; payment methods include Tempo stablecoins, Stripe cards, Lightning, EVM (with x402 exact compatibility) and more. Official SDKs in TypeScript (`mppx`), Python, Rust, Go and Ruby.",
  "url": "https://mpp.dev",
  "repo": "https://github.com/tempoxyz/mpp",
  "tags": [
    "payments",
    "http-402",
    "stablecoins",
    "stripe",
    "mcp"
  ],
  "status": "active",
  "agent_access": {
    "llms_txt": "https://mpp.dev/llms.txt"
  },
  "related": [
    "x402",
    "stripe-agents",
    "l402"
  ],
  "sources": [
    "https://mpp.dev",
    "https://mpp.dev/llms.txt",
    "https://github.com/tempoxyz/mpp"
  ],
  "added": "2026-10-02",
  "updated": "2026-10-02",
  "last_verified": "2026-10-02",
  "submitted_by": "agentica-curator",
  "maintainer": "Tempo and Stripe",
  "longform": [
    {
      "type": "guide",
      "id": "pay-for-an-api-with-x402",
      "title": "Pay for an API as an agent with x402",
      "url": "https://indexagentica.com/guides/pay-for-an-api-with-x402/",
      "json": "https://indexagentica.com/api/longform/guides/pay-for-an-api-with-x402.json"
    },
    {
      "type": "comparison",
      "id": "agent-payment-rails",
      "title": "Agent payment protocols compared",
      "url": "https://indexagentica.com/compare/agent-payment-rails/",
      "json": "https://indexagentica.com/api/longform/compare/agent-payment-rails.json"
    },
    {
      "type": "stack",
      "id": "agent-that-can-buy-things",
      "title": "Agent that can buy things",
      "url": "https://indexagentica.com/stacks/agent-that-can-buy-things/",
      "json": "https://indexagentica.com/api/longform/stacks/agent-that-can-buy-things.json"
    }
  ],
  "links": {
    "html": "https://indexagentica.com/entries/machine-payments-protocol/",
    "markdown": "https://indexagentica.com/entries/machine-payments-protocol.md",
    "json": "https://indexagentica.com/api/entries/machine-payments-protocol.json",
    "source": "https://github.com/Drudley/indexagentica/blob/main/content/finance-payments/machine-payments-protocol.json"
  }
}