Building an AI agent that takes payments with Stripe

The most satisfying thing an AI sales agent can do is close the loop on a sale: answer the prospect, send a payment link, and act the moment they pay. Here's how that works — safely.

The flow

1. The agent qualifies the prospect and agrees on what they're buying.
2. It creates a payment link (via your payment provider) for the right amount.
3. It sends the link in the conversation.
4. The customer pays — and the payment provider fires a signed event.
5. The agent reacts: marks the deal closed, provisions access or fulfills the order, and notifies the team.

Steps 4–5 are the part that makes it an agent and not a form: the payment becomes an event the workflow continues from. (This is the external-party pattern — a non-agent participant, the customer and the payment system, joining the same job.)

Do it without risking your keys

The wrong way is a full secret key sitting in agent code or a prompt. The right way:

• Use a restricted key with only the scopes you need (create payment links, read events) — never full access.
• Mint short-lived, per-action credentials so nothing long-lived touches the agent. (more)
• Verify the webhook signature so a fake "paid" can't fool the agent.

Correctness matters here

A payment must mark exactly one deal closed, exactly once. That's a job for a deterministic operation — a transactional write the agent calls — not free-form SQL the agent improvises. See why deterministic operations matter.

Closing a deal end to end — chat to cash — is the kind of thing a well-built agentic app does on its own. See what you can build for sales or book a demo.