ChatGPT

ChatGPT exposes two integration paths for the Estaite MCP server:

1. The native MCP connector (Pro / Enterprise / Team plans).
2. A custom GPT action (any plan that supports custom GPTs).

The MCP connector is preferred — it’s a one-line URL and the tool catalog updates automatically. Use a custom GPT action when MCP isn’t available on your plan.

Prerequisites

• An Estaite MCP API key from estaite.com/developers.

Option A — MCP connector

1. Open ChatGPT → Settings → Connectors → Add custom connector.

2. Set the connector URL to:

   https://mcp.estaite.com?key=YOUR_API_KEY

   Replace YOUR_API_KEY with your key. ChatGPT only supports a URL string here, so the key is passed via ?key=. See Authentication → Option 3 for the security notes.

3. Save. The 13 Estaite tools become available in any ChatGPT conversation that has the connector enabled.

Option B — Custom GPT action

1. Create a new custom GPT (Explore GPTs → Create).
2. Under Configure → Actions, add an Authentication of type API Key with header name x-api-key and your Estaite key.
3. Provide an OpenAPI schema. The Estaite team publishes a minimal schema you can drop in, or you can call the MCP JSON-RPC endpoint directly using the shape documented in HTTP / JSON-RPC.

For most users the MCP connector (Option A) is simpler — only fall back to a custom GPT action if MCP isn’t on your plan.

Troubleshooting

• Connector won’t save — ChatGPT requires the URL to be HTTPS and to resolve. Check that you typed https://mcp.estaite.com?key=..., not http://.
• 401 — wrong, malformed, or revoked key.
• Tools don’t appear in chat — make sure the connector is enabled for the conversation (the toggle on the message composer).