Yesterday, Stripe launched the Machine Payments Protocol (MPP) an open standard for AI agents to pay for services autonomously.
That means the full stack for an autonomous sales cycle now exists:
Cal.com agent schedules meetings
AgentMail agent sends and manages email
Signbee agent sends contracts for signing
Stripe MPP agent processes payment
An AI agent can now research a prospect, send outreach, book a call, draft a contract, get it signed, and collect payment without a human clicking a single button.
CharpstAR
Hey Product Hunters! 👋
I'm Michael, founder of Signbee.
AI agents can research prospects, draft contracts, and book meetings — but the moment a signature is needed, everything stops. Someone has to log into DocuSign, upload a PDF, drag fields around a screen. The entire autonomous workflow breaks at the last step.
So I built what was missing: a single API call that sends a document for signing. No account required. No templates. No envelope configuration.
Write your contract in markdown (or pass your own PDF URL), and Signbee handles everything — verification, signatures, time stamping, and delivery.
Three ways to connect:
🔌 Direct REST API — works from any language
🤖 MCP Server — Claude, Cursor, Windsurf (ask your AI: "send this NDA")
⚡ Agent Skill — one-line install for agent frameworks
And as of yesterday, the full agentic infrastructure stack is complete:
🗓️ @Cal.com Cal Agents for scheduling ✅
📧 Agentmail for email ✅
✍️ @Signbee for e-signatures ✅
💲 @Stripe MPP for payments ✅
We're now at a point where an AI agent can run a full sales cycle — research, outreach, book, sign, pay — without a human touching a single step.
Free tier gives you 5 docs/month — no credit card, no setup. Just call the endpoint.
What would you use agent-powered signing for? NDAs? Freelance contracts? Something I haven't thought of?
→ signb.ee