MPP explorer
The Machine Payments Protocol (Stripe + Tempo, March 2026) is the second open standard for machine-to-machine payments. This is the live MPP service catalog, indexed from the protocol's public registry — and OpenSpender is being built to speak both standards.
139
mpp services indexed
137
active
9
top categories
tempo · stripe · evm
payment methods
34 matching
| service | categories | payment methods | status |
|---|---|---|---|
AgentMail — Email inboxes for AI agents. mpp.api.agentmail.to | aisocial | tempo | active |
Exa — Neural web search and page-content retrieval for AI agents, paid per request with no API key. api.exa.ai | searchai | tempo | active |
molty.cash — USDC payment infrastructure for AI agents and humans. Send tips, hire people for tasks, and create/earn from gigs — all settled on-chain via x402 (Base, Solana, api.molty.cash | aisocial | tempo | active |
Parallel — Cited answers, web search, page extraction, and multi-hop web research. parallelmpp.dev | searchai | tempo | active |
StablePhone — AI phone calls, dedicated phone numbers, and iMessage/FaceTime lookup — pay per request. stablephone.dev | aisocial | tempo | active |
StableStudio — Pay-per-generation AI image and video creation — Nano Banana, GPT Image, Grok, Flux, Sora, Veo, Seedance, and Wan. stablestudio.dev | aimedia | tempo | active |
Auto.exchange — The agent exchange. Discover, hire, and pay agents for coding, design, writing, and more. Pay per request with stablecoins on Tempo. api.auto.exchange | ai | tempo | active |
DeepSeek — Frontier AI models — DeepSeek-V3 for fast chat and code, DeepSeek-R1 for deep chain-of-thought reasoning. OpenAI-compatible API format. Among the most capable a deepseek.mpp.paywithlocus.com | ai | tempo | active |
Diffbot NL — Natural language processing — NER, sentiment, facts, summarization. diffbot-nl.mpp.paywithlocus.com | ai | tempo | active |
Grok — xAI models — chat, web/X search, code execution, image generation/editing, and text-to-speech. grok.mpp.paywithlocus.com | ai | tempo | active |
Groq — Ultra-fast LLM inference — Llama 3.3, DeepSeek R1, Gemma 2, GPT-OSS, Qwen, Whisper, and PlayAI TTS. OpenAI-compatible API with industry-leading speed. groq.mpp.paywithlocus.com | ai | tempo | active |
Mathpix — OCR for math, science, and documents — extract LaTeX, MathML, and Mathpix Markdown from images and handwriting. mathpix.mpp.paywithlocus.com | ai | tempo | active |
Mistral AI — Premier and open-source LLMs — Mistral Large, Medium, Small, Codestral, Magistral reasoning, Pixtral vision, text embeddings, and content moderation. mistral.mpp.paywithlocus.com | ai | tempo | active |
Perplexity — AI-powered search — Sonar chat with real-time web grounding, web search, and embeddings. perplexity.mpp.paywithlocus.com | aisearch | tempo | active |
Replicate — Run thousands of open-source AI models via API — image generation, language models, speech recognition, video, and more. Pay only for what you use. replicate.mpp.paywithlocus.com | aimedia | tempo | active |
Stability AI — Generative AI platform for images, 3D models, and audio — text-to-image, editing, upscaling, and more. stability-ai.mpp.paywithlocus.com | aimedia | tempo | active |
Suno — AI music generation — create full songs, generate lyrics, and build custom music tracks with state-of-the-art AI models. Supports custom styles, vocals, and ins suno.mpp.paywithlocus.com | aimedia | tempo | active |
Tako — Data visualization and research platform. Search Tako's curated data and the web for citation-backed knowledge cards, get cited answers, download the data behin tako.com | datasearchai | tempostripe | active |
Papercut — Postcards penned by your agent. Let your agent roast and send you a digital or physical postcard. papercut.lol | aisocial | tempostripe | active |
Baseten Model APIs — Baseten is a high-performance inference platform for running open source LLMs. This API provides an OpenAI-compatible chat completions endpoint, so it works as mpp.orthogonal.com | aicompute | tempo | active |
Andi Search API — AI Search for the Next Generation mpp.orthogonal.com | searchai | tempo | active |
AgentMail via Orthogonal — Programmatic email for AI agents. Create inboxes, send/receive emails, manage threads and drafts. Inboxes cost $2/month. Inboxes inactive for 30+ days are autom mpp.orthogonal.com | aisocial | tempo | active |
Anthropic — Claude chat completions (Sonnet, Opus, Haiku) via native and OpenAI-compatible APIs. anthropic.mpp.tempo.xyz | ai | tempo | active |
AssemblyAI — AssemblyAI via OpenRouter with live pricing and one-shot payments. assemblyai.mpp.tempo.xyz | ai | tempo | active |
ElevenLabs — ElevenLabs via OpenRouter with live pricing and one-shot payments. elevenlabs.mpp.tempo.xyz | ai | tempo | active |
fal.ai (queue) — Async access to supported Fal image, video, speech, and vector models. Use when generation can exceed the ~100s sync timeout fal.run enforces. Submission return fal-queue.mpp.tempo.xyz | aimedia | tempo | active |
fal.ai — Image, speech, and vector generation through explicitly supported Fal model endpoints. Video runs on fal-queue. fal.mpp.tempo.xyz | aimedia | tempo | active |
Fish Audio — Fish Audio via OpenRouter with live pricing and one-shot payments. fish-audio.mpp.tempo.xyz | ai | tempo | active |
HeyGen — HeyGen via OpenRouter with live pricing and one-shot payments. heygen.mpp.tempo.xyz | ai | tempo | active |
Kling — Kling via OpenRouter with live pricing and one-shot payments. kling.mpp.tempo.xyz | ai | tempo | active |
Microsoft AI — Microsoft AI via OpenRouter with live pricing and one-shot payments. microsoft-ai.mpp.tempo.xyz | ai | tempo | active |
Modal — Serverless GPU compute for sandboxed code execution and AI/ML workloads. modal.mpp.tempo.xyz | computeai | tempo | active |
OpenAI — Chat completions, embeddings, image generation, and audio with model-tier pricing. openai.mpp.tempo.xyz | aimedia | tempo | active |
OpenRouter — Chat, decisions, video, speech, and transcription with live model pricing. openrouter.mpp.tempo.xyz | ai | tempo | active |
x402 vs MPP
| x402 | MPP | |
|---|---|---|
| author / steward | Coinbase → Linux Foundation | Stripe + Tempo |
| mechanism | HTTP 402 challenge, pay-per-request | IETF Payment HTTP auth, session-based |
| rails | USDC (Base, Solana, more) | USDC on Tempo, card via Visa, Lightning |
| accounts | none — wallet is identity | Stripe compliance stack built in |
| transports | HTTP | HTTP, MCP, JSON-RPC |
| compatibility | MPP is backwards-compatible with x402 — MPP clients can pay x402 services, so x402-first services reach both worlds | |
OpenSpender + MPP
The OpenSpender gateway ships x402-first (reachable by MPP clients via backwards compatibility). Native MPP endpoints — session payments, card rails, MCP transport — are on the roadmap. Protocol sources: mpp.dev · specifications.