I built an e-signature API for AI agents — AMA 🐝

Hey Product Hunt! 👋

I'm Michael, solo founder of Signbee — the e-signature API built for the agentic era.

The problem: Every signing platform was built for humans clicking through GUIs. But AI agents don't have browsers — they have API calls. I needed something an agent could call to get a document signed in one request, not a 47-step OAuth dance with a legacy enterprise SDK.

What I built: One API call. Document signed. That's it. Signbee gives developers (and their agents) a clean REST API to create, send, and track legally-binding e-signatures.

The bigger picture: We're watching the agentic infrastructure stack form in real time:

• 🗓️ Cal.com → scheduling

• 📧 AgentMail → email

• ✍️ Signbee → e-signatures

• 💲 Stripe MPP → payments

An AI agent can now research a prospect, send outreach, book a meeting, sign a contract, and process payment — no human, no GUI, end to end.

Built with: Next.js, Prisma, BetterAuth, Resend, and a lot of late nights.

Happy to answer anything about building for agents, the e-signature space, or going solo. AMA! 🐝