# Connect ChatGPT to SignWith (MCP)

> Add SignWith to ChatGPT as an app, and ChatGPT can send documents for signature, follow signers and verify signed PDFs while you chat.

Source: https://signwith.co/docs/mcp/chatgpt · Updated 2026-10-02

ChatGPT connects to remote MCP servers as apps you create in developer mode. Steps checked against OpenAI's documentation on 1 October 2026; ChatGPT's labels change often, so look for the closest match if a name differs.

ChatGPT signs in to SignWith with OAuth, so you never paste an API key: you approve the connection on SignWith's own sign-in page.

## Before you start

- Developer mode is available on ChatGPT Plus, Pro, Business, Enterprise and Education, on the web.
- On a Business, Enterprise or Education workspace, an admin may need to allow developer mode first.

## Add SignWith

1. In ChatGPT, open **Settings → Security and login** and turn on **Developer mode**.
2. Go to **Plugins** and select the **+** button to create an app.
3. Name it SignWith, enter `https://app.signwith.co/mcp` as the MCP server URL, and choose **OAuth** for authentication.
4. Create the app. ChatGPT sends you to SignWith: sign in, and choose **Full access** or **View only**.

The new app appears under **Drafts** in your app settings, where you can see its tools and turn individual tools off.

## Use it in a chat

Apps in developer mode aren't on in every chat automatically. In the message box, open the **+** menu, choose **Developer mode**, and select SignWith. Then ask, for example:

- "Show my SignWith templates."
- "Send the lease template to Grace Hopper, `grace@example.com`, as the tenant."
- "Which signature requests are still open?"

ChatGPT asks you to confirm before it runs a tool that changes something, such as sending a document.

## Credits in ChatGPT

Inside ChatGPT, SignWith doesn't offer its credit-purchase tools. If the account runs out of credits, ChatGPT tells you to add credits in SignWith, then you can ask it to try again. See [credits and billing](https://signwith.co/docs/api/credits).

## Troubleshooting

- **Sign-in fails:** check you're signing in to the SignWith account you use for documents, then create the app again.
- **ChatGPT can read but not send:** you chose View only. Remove the app's connection and connect again with Full access.
- **Disconnect:** remove the app in ChatGPT's app settings.

All tools and access rules are on the [MCP overview](https://signwith.co/docs/mcp).