Thread title: The agentic infrastructure stack just got its final piece

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.

6 months ago this was theoretical. Today every piece is live.

For those building with AI agents: which part of your workflow still breaks because it needs a human in a GUI?