Mpp

Machine Payments Protocol (MPP)

The open protocol for machine-to-machine payments. Agents pay for services in the same HTTP request — no API keys, no signups, no billing accounts.

How It Works

1. Client requests a paid resource
2. Server returns 402 Payment Required with supported payment methods
3. Client pays and retries with a Credential (proof of payment)
4. Server verifies payment, returns the resource with a Receipt (proof of delivery)

Quick Start with Tempo Wallet (Recommended)

Paste this into your agent to set up Tempo Wallet:

Read https://tempo.xyz/SKILL.md and set up tempo

Or manually:

Install CLI:

exec command="curl -fsSL https://tempo.xyz/install | bash"

Connect wallet:

exec command="tempo wallet login"

List available services:

exec command="tempo wallet services"

Make a paid request:

exec command="tempo request -X POST --json '{\"prompt\": \"a sunset over the ocean\"}' https://fal.mpp.tempo.xyz/fal-ai/flux/dev"

Quick Start with mppx CLI

Install:

exec command="npm install -g mppx"

Create account:

exec command="mppx account create"

Make a paid request:

exec command="mppx https://mpp.dev/api/ping/paid"

Payment Methods

Payment Intents

SDKs

TypeScript Client Example

import { Mppx, Method } from 'mppx'

// Create payment-aware fetch
const mppx = await Mppx.create({
  methods: [Method.tempo.charge(), Method.tempo.session()]
})

// Fetch automatically handles 402 → pay → retry
const res = await fetch('https://api.example.com/generate', {
  method: 'POST',
  body: JSON.stringify({ prompt: 'hello' })
})

Use Cases for Agents

• Pay for LLM inference — call LLM providers via MPP, pay per token
• Generate images — request from fal.ai, pay per request
• Search the web — query Parallel for real-time results, pay per query
• Agent-to-agent commerce — agents pay each other for services (ERC-8183 compatible)
• Self-sustaining agents — combine with stETH treasury to fund operations from yield

Integration with Ottie

Ottie agents can use MPP to:

1. Pay for external API calls autonomously (LLM, image gen, search)
2. Accept payments for Ottie's own skills as an MCP service
3. Combine with steth-treasury for yield-funded autonomous spending
4. Use venice-private-ai for private inference + MPP for paid public APIs

Resources

• Protocol spec: https://paymentauth.org
• Documentation: https://mpp.dev
• Tempo Wallet: https://wallet.tempo.xyz
• SDKs: https://mpp.dev/sdk