AGI-pilled signing.
Your AI drafts it, they sign it. Ask Claude, ChatGPT, Cursor or Claude Code to write the agreement and send it for signature. Each person signs on the page with their typed name, and everyone gets the signed copy and a certificate anyone can check.
Send 15 documents a month free, unlimited on Pro. Signing is free for everyone you send it to.
9f3a…c41e · sealedOne ask, from draft to signed.
- 1
Your AI writes it
It publishes the agreement as a page, with a signature block for each party.
- 2
It sends it for signature
Each person gets an email with the link. Your AI can tell you who has signed, any time.
- 3
Everyone signs at the link
They sign in with that email, read it, type their name. When the last one signs, everyone gets the signed PDF and the certificate.
What your AI calls, through spacesheep’s MCP server
request_signaturesAsk named people to sign a version of a page: email, name, which signature block is theirs, and who they sign for.signing_statusWho has signed, who hasn’t, and the certificate link.withdraw_signature_requestClose a request nobody has finished signing.
An AI can send and follow a request. It can’t sign: a signature is always the person’s own act.
What e-signature law asks for.
Under the US ESIGN Act and UETA, an electronic signature counts when the signer meant to sign, the parties agreed to do business electronically, the signature is the person’s own and tied to the record, and the record is kept. Here is how each is covered.
- They meant to sign. Each person types their name and presses Sign. Declining is one press too.
- They agreed to sign electronically. A short consent comes first, and the record names the exact wording they saw.
- It was them. They sign in with the email address you sent it to. The time, browser and network address are kept.
- Exactly this document. The signature is tied to a fingerprint (SHA-256) of the version’s files, so one changed comma is a different document.
- Nobody can quietly change it. Every signature and the finished certificate carry a digital seal anyone can check against our published key.
- Everyone keeps a copy. A receipt when each person signs; the signed version and its certificate as PDFs when the last one does.
Not legal advice. A few documents, such as wills and some court and real-estate papers, can’t be signed electronically.
Built for the document your AI wrote.
DocuSign, Dropbox Sign and PandaDoc can take requests from an AI now too. The difference is what gets signed: they sign a file or a template, and here it’s the page your AI wrote, sent by the AI that wrote it.
| DocuSign | Dropbox Sign | PandaDoc | spacesheep | |
|---|---|---|---|---|
| Send it from your AI | An official Claude connector, and a ChatGPT app | Through Dropbox’s MCP server, in beta | Official Claude and ChatGPT connectors | Any MCP client: Claude, ChatGPT, Cursor, Codex, Claude Code |
| What gets signed | An uploaded file or a template | An uploaded file | A document in its editor, made from a file, a template or Markdown | The page your AI wrote, as it is, at its own link |
| Cheapest way to send | $11 a month billed yearly, 5 envelopes a month | Free for 3 a month; $15 a month for unlimited | Free for 5 a month; $19 a month per user, billed yearly | Free for 15 a month; Pro, $4.50 a month, for no monthly cap |
| What signers need | No account | No account | No account | A Google or email sign-in, with the address you sent it to |
| The record | Certificate of Completion | Audit trail | Signature certificate and audit trail | Certificate with a seal anyone can check against our published key |
Sources: each product’s own pages and the law’s text, checked 13 October 2026
- DocuSign: eSignature plans and pricing
- Claude connectors: DocuSign
- DocuSign: ChatGPT and Codex
- DocuSign: signing without an account
- DocuSign: Certificate of Completion
- Dropbox Sign: pricing
- Dropbox Help: Free plan
- Dropbox Help: Essentials plan
- Dropbox Help: the Dropbox MCP server
- Dropbox Help: do signers need an account
- Dropbox Help: audit trail
- PandaDoc: compare plans
- PandaDoc: Free plan
- Claude connectors: PandaDoc
- PandaDoc: app for ChatGPT
- PandaDoc: signing as a recipient
- PandaDoc: signature certificate
- ESIGN Act, 15 U.S.C. §7001
- ESIGN Act definitions, 15 U.S.C. §7006
Signed without leaving the chat.
-
1
Connect your AI
One click for Claude or Cursor. ChatGPT, Codex and the rest take a minute on the setup page.
-
2
Ask for the document
Name who signs and for which company:
Write a mutual NDA between my company and Acme Corp, publish it, and send it to dana@acme.com and me to sign. -
3
Read it, then sign
You get the email too. Read the page, change anything first, then sign. Your AI tells you when the others have.
Asked often.
Can my AI send a document for signature?
Yes. Connect Claude, ChatGPT, Cursor, Claude Code or any other MCP client to spacesheep, then ask it to write the document and send it to the people who need to sign. It publishes the document as a page and sends the request; each person gets an email. The signing itself is always the person’s own act: an AI can send and track a request, but it can never sign for anyone.
Is an electronic signature here legally binding?
Signing is built around what US e-signature law (the ESIGN Act and UETA) asks for: each signer shows intent by typing their name and pressing Sign, agrees to sign electronically first, is identified by the email address you named, and signs one exact, fingerprinted version; everyone keeps a copy. Most business agreements, like NDAs, contractor and sales agreements and offer letters, can be signed this way. A few documents, such as wills and some court and real-estate papers, can’t be signed electronically. This isn’t legal advice; ask a lawyer about your document.
Do the people signing need an account?
They sign in with the email address you sent it to, with Google or an email link, which takes about a minute the first time. That sign-in is what proves who signed. Signing is free on every plan.
What does it cost?
A free account sends 15 documents a month, once it is a week old. Pro ($4.50 a month), Max and Team send unlimited documents, with no monthly cap. The people you send them to sign for free. See the plans page for the details.
What do I get when everyone has signed?
Every party gets an email with the signed version and its signature certificate, both as PDFs. The certificate lists who signed, when, from which browser and address, the consent they gave, and the fingerprint of the exact document, and it carries a digital seal anyone can check.
What if the document changes after someone signs?
The signed version can’t change. You can keep editing the page, and the page says the newer version isn’t signed; to sign the changes, send a new request that names the one it amends. Every version and every request stays on record.
How do I check a certificate is real?
Each signature and each finished certificate is sealed with spacesheep’s signing key, whose public half is published at spacesheep.dev/.well-known/spacesheep-signing.json. Anyone can check the seal against it, and check the document’s fingerprint against the signed version’s files.
Can I sign a PDF I already have?
Yes. Ask your AI to publish the PDF as a page first, or move it with the spacesheep Chrome extension, then send that page for signature. Signing works on any version you’ve published.