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Works with ChatGPT

Use AddSign in ChatGPT

Connect with your AddSign login, no API key. Then send documents for signature, check who signed, remind signers, and get the signed PDF just by asking.

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Set it up

  1. 1

    In ChatGPT, open Settings → Plugins → Add → “Create custom MCP server”

    This option is available on ChatGPT plans that allow custom MCP servers. Once AddSign is listed in ChatGPT’s plugin directory, you will be able to search for “AddSign” instead.

  2. 2

    Enter the AddSign server details

    Name: AddSign. Server URL: https://addsign.io/api/mcp. Authentication: OAuth (leave the advanced OAuth settings as they are). Confirm you want to continue, then create it.

  3. 3

    Sign in to AddSign and click “Allow access”

    A window opens on addsign.io showing “ChatGPT wants to connect to your AddSign account”, what it will and will never be able to do, and that you will return to chatgpt.com. Log in (or sign up free), then click Allow access. No API key, and your password stays with AddSign.

  4. 4

    Ask ChatGPT

    Click “Try in chat” and ask “What AddSign templates do I have?”. Then try “Which of my documents are still waiting for signatures?” or “Send the NDA template to Maria Lopez, maria@example.com”.

What ChatGPT can never do in AddSign

Cancel or delete documents, change your templates, touch billing, or see your API keys. Every send and reminder is recorded in the document's audit trail, and you get an email for every document it sends.

Support

Questions or problems using AddSign in ChatGPT? Email support@addsign.io with the email address of your AddSign account and what you asked ChatGPT. Never send us your password.

Questions

What can ChatGPT do with AddSign?

List your templates and documents, send a document for signature from one of your existing templates, check signing status, remind pending signers, and get a download link for the signed PDF.

Can ChatGPT send a document without asking me?

By default, ChatGPT asks you to confirm before AddSign sends a document or a reminder, and shows who it will go to. You also get an email for every document sent through ChatGPT, and every send is recorded in the document’s audit trail.

How do I cancel a document ChatGPT sent?

ChatGPT cannot cancel or delete documents. Open the document in AddSign and cancel it there, or use the link in the “Your agent sent…” email you receive for every send.

I don’t have any templates yet. What do I do?

ChatGPT sends documents from your AddSign templates. Create one first in AddSign under Templates → New Template, then ask ChatGPT to send it. Templates send as they are; to change the wording, edit the template in AddSign first.

How do I disconnect AddSign from ChatGPT?

In ChatGPT, open Settings → Plugins → AddSign and remove the connected account or the plugin. Access stops immediately.

What does it cost?

Using AddSign from ChatGPT is included on every AddSign plan, including the free plan, within your plan’s normal monthly limits. Which ChatGPT plans can use plugins is up to OpenAI.

Is AddSign in ChatGPT’s plugin directory?

AddSign has been submitted to ChatGPT’s plugin directory and is in review. Until it is listed, connect it with the server URL as described above. AddSign is also listed in Anthropic’s Claude Connectors Directory.

Using Claude instead? Connect AddSign to Claude

AddSign Help

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