Human signatures for AI agents

Your agent asks.
You sign.
The PDF comes back.

Gotoquill lets ChatGPT, Claude, Grok Bot, Muse — any MCP client — request a real human signature on a PDF. You review and sign on a page. Close the tab. The signed file flows straight back into the chat.

Get Gotoquill Watch the loop
Works with ChatGPT Claude Grok Bot Muse any MCP host
Assistant
I’ve prepared the NDA for Maya Chen. Ready when you are — I’ll open a signing page.
You
Yes — send it.
Gotoquill
Signature requested.
PDF
NDA-Maya-Chen.pdf Sealed link · key stays in the fragment
https://sign.local/#…
Review & sign ● End-to-end sealed

Mutual Nondisclosure

This agreement is between Northwind Labs and Maya Chen…

Confidential information excludes information that is public…

Signer
Maya Chen
30 Oct 2026
Gotoquill
Signed. Closing the page returned the file here.
✓
NDA-Maya-Chen.signed.pdf Saved next to the original · audit record written
You
Perfect — email it to Maya.
Agent requests a signature in chat
How it works

Three beats. No ceremony.

Built for the moment an agent needs a human — not another dashboard to babysit.

01 — Ask

Agent calls Gotoquill

From ChatGPT, Claude, Grok Bot, Muse, or any MCP host: request a signature on a local or Cloud PDF.

02 — Sign

You confirm on a page

Open the sealed link, review the document, draw or reuse your signature. Keys live in the URL fragment — not on our servers.

03 — Return

PDF lands back in chat

Close the tab. The signed file and audit record flow to the agent. Continue the conversation.

Install

Local in one line. Cloud when you need hosted.

Open-source Gotoquill on your machine. Gotoquill Cloud for ChatGPT directory / hosted MCP.

Terminal · local MCP 
# open source · runs on your laptop
pip install gotoquill
gotoquill mcp

# or: uvx gotoquill mcp

Gotoquill Cloud

Hosted, stateless, OAuth MCP for assistants that can’t run local tools — aimed at ChatGPT app directory and similar.

  • Zero-knowledge sealed links
  • Streamable HTTP + OAuth
  • Same product feel as local

MCP endpoint (when live): mcp.gotoquill.com

Privacy

Zero-knowledge by design

Encryption keys ride in the link fragment — they never hit the relay. Ciphertext is a mailbox, not a document store. We don’t keep a long-term archive of your PDFs.

Read the privacy draft
Sealed links AES-GCM end-to-end. The relay sees ciphertext only.
Your relay, your rules Open-source clients deploy their own Cloudflare Worker — no shared public default.
Human confirmation Agents can’t forge a signature. A person has to open the page and consent.
Apache-2.0

Prefer everything on your laptop?

Run open-source Gotoquill locally — no Cloud account required. Same signing UX, same sealed links, audit trail next to the file.

Install locally Open source