You are the founder and the sales team, running demos between product and everything else. This stack turns each demo call into an annual order form or pilot agreement the buyer signs and pays, with one review from you between meetings.
Every layer is swappable; the shape is not. An agent that listens to the demo, a contract layer that closes, and your own Stripe where the subscription starts.
No SDK, no webhooks, no integration project. The stack runs on two connections and one prompt between meetings.
You run the demo the way you always do. Fathom, Granola or Fireflies records it, so the plan the buyer leaned toward, the budget they mentioned and the pilot they asked about come out the other side as notes the agent can read. You walk into your next meeting; the notes wait for you.
Point Claude Code or Claude at the call notes and it authors the order form through the LetSign MCP: subscription plans the buyer can pick between, monthly and annual side by side, tax displayed on the signing page, and the legal terms folded into collapsible sections so the agreement stays readable. One proven opener:
"From this morning's demo call with Halvern Systems, draft the annual agreement in LetSign - a monthly plan and an annual plan at the discount we discussed - and stage it for my review before my 3pm."
The agent stages the agreement; nothing sends itself. Between two calls you read every line, adjust a plan or a clause, and press send. Everything the agent staged is also fully editable by hand in the LetSign app, full parity with the MCP, so a quick fix never needs a prompt.
Your buyer opens one public link, chooses monthly or annual, sees the tax displayed, expands the collapsible terms if they want the detail, verifies their email and signs a binding e-signature. Remember: the sender never signs. The buyer does.
Payment is collected at signature time through your own Stripe account, and the plan the buyer picked is the plan the billing follows: subscription, one-off pilot fee or save-card-on-file. LetSign never holds your funds.
This page is the recipe; the deep dives live one level down. If you sell projects rather than seats, the freelancer agent stack is the same shape with a retainer at the end, the AI SDR stack covers the fuller outbound motion, and Stripe payments explains how the billing rail plugs in.
The agreement is drafted from the transcript, so it opens with the buyer's own words, the plan they leaned toward, the start date they asked for. Not a template with a logo swapped in.
Buyer wants a three-month pilot before the annual, or a different payment term? Tell the agent in one sentence; it updates the agreement and restages it for your review. No export, re-edit, re-send cycle.
The same link carries plan choice, tax display, collapsible terms, email verification, binding signature and payment. There is no gap between yes and live where the deal can cool.
The recipe holds no matter which brand fills each slot. Swap freely; the LetSign layer and your Stripe stay put.
| LAYER | IN THIS RECIPE | SWAP IT FOR |
|---|---|---|
| The agent | Claude Code or Claude | Claude Code in the terminal, Claude in a chat window, or LangGraph when the pipeline is code |
| The recorder | Fathom | Granola, Fireflies, or any tool that turns the demo into notes the agent can read |
| The billing rail | Your Stripe | Nothing. The subscription runs in your own Stripe account; this slot does not swap. |
Yes. LetSign agreements support conditional pricing: the agent drafts a monthly plan and an annual plan into the same document, and the buyer picks one on the signing page, tax displayed, before they sign. Billing follows their pick, so the subscription that starts in your Stripe is on exactly the plan they chose.
No. The minimum stack is an agent, LetSign and your own Stripe account. A call recorder like Fathom, Granola or Fireflies makes the agreement far more personal because the agent drafts from what was actually said on the demo. Start small and add layers when you feel the gap.
The Free plan is $0 with a 0.20% fee on payments collected through it. The launch plan is $19 per month until October 1, 2026, and that price is locked until October 1, 2028; after launch the standard price is $49 per month. Paid plans pay 0% on payments up to $20,000 per month, then 0.05% above that.
You do. The agent authors and stages the agreement, but nothing sends itself: the human send-gate means you review every line between meetings and press send yourself. On the other side, the sender never signs. Your buyer verifies their email and signs the binding e-signature.
Install LetSign free, connect your Stripe, and let the agent stage the next order form while you take the next meeting.
INSTALL LETSIGN FREE