E-signature contracts for agencies, signed and paid in one flow
Send a branded proposal, SOW or MSA, get a binding e-signature, and collect the deposit through your own Stripe, all in a single link. Your team or your AI agent can run it end to end.
START FREE FROM CLAUDE - ONE CLICKChasing signatures in one tool, then invoicing in another, slows your cash
Most agencies stitch the close together by hand. A proposal in one app, an e-signature request in another, then a separate invoice that goes out days later and gets paid whenever it gets paid. Every hand-off is a place a deal can stall, and the gap between "signed" and "paid" is dead time your business carries. When the paperwork and the deposit live in different tools, cash always arrives late.
One link that carries the whole close
Branded proposals clients choose from
Send proposals, SOWs and MSAs in your workspace branding. Offer conditional pricing, several options in one contract, and let the client pick the scope or tier that fits. The terms adjust to their choice.
A binding e-signature
The client opens a public link, verifies their email, and signs a legally binding e-signature. Signatures are recognised under frameworks such as US ESIGN and UETA and the EU eIDAS regime, so a signed agency contract holds.
Deposit or retainer on signing
Collect a deposit or set up a retainer as a Stripe subscription in the same step the client signs. Charge once, save a card for later, or start recurring billing, all through your own Stripe connection.
Your AI agent can send them
LetSign is an MCP server you install free in one click from Claude or Codex. Your AI agent can author the contract and send it autonomously, then the client signs and pays without you driving their side.
Signature and deposit arrive together, not days apart
Agencies win by moving fast on approvals and getting cash in early. LetSign collapses the proposal, the contract, and the first payment into one flow the client completes in a single sitting. Because it runs on your own Stripe, one-off deposits, card-on-file for charge-later, and retainer subscriptions all sit inside the contract the client signs. A $0 option works too, for agreements that need a signature but no charge. When your agent can send these on its own, you can also learn how contracts for Claude agents work end to end, and what it means to build on an agent-native contract.
Questions agencies ask
Can agencies collect a deposit when a client signs?
Yes. Payment is part of the signing flow. When your client signs the contract, LetSign charges the deposit through your own Stripe connection in the same step, so the signature and the first payment land together instead of waiting on a separate invoice.
Can clients choose a plan inside the contract?
Yes. You can present conditional pricing, several options in one contract, and the client picks the one that fits. The terms and the billing adjust to their choice, so a single document can cover a starter scope and a larger retainer without you sending two proposals.
Does it support retainers or subscriptions?
Yes. Payments run through your Stripe account and can be one-off charges or recurring subscriptions. A retainer can be set up as a subscription that starts when the client signs, so the ongoing billing begins the moment the agreement is accepted.
Can my AI agent send agency contracts?
Yes. LetSign is delivered as an MCP server you install free in one click from Claude or Codex. Your AI agent can author the proposal, send the branded contract, and let the client sign and pay, all without you driving the recipient's signing by hand.