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ChatGPT

ChatGPT connects to Stackyapper as a custom connector at the root URL. A ChatGPT workspace administrator may need to allow custom MCP apps first.

Before you start

  • You can sign in to ChatGPT on the web and to Stackyapper.
  • Your ChatGPT plan allows custom MCP connectors with write access; this requires a paid plan with developer mode enabled, and a ChatGPT workspace administrator may need to allow custom connectors first.
  • Your Stackyapper workspace has at least one healthy app connection, and you have permission to use at least one read-only tool.
  1. Open app settings
    In ChatGPT on the web, open Settings → Apps (or Connectors, depending on rollout) → Create. Workspace administrators can also use Workspace Settings → Apps → Create.
  2. Enable developer mode if required
    Open Settings → Apps → Advanced Settings and enable developer mode when the custom-app option is not already visible. Your workspace administrator may first need to allow custom MCP apps.
  3. Add Stackyapper
    Create a custom connector named Stackyapper with this URL:
    https://mcp.stackyapper.dev
    Workspaces with a verified custom access domain use the origin shown on the portal's AI clients page instead.
  4. Authorize the connection
    Complete the Stackyapper sign-in and review the workspace shown on the consent page before approving access.
  5. Enable it in a conversation
    Select Stackyapper from ChatGPT's apps picker when it is not enabled by default.
Use the root URL for ChatGPT. Do not append /mcp. With /mcp appended, ChatGPT receives the full generic tool surface instead of the ChatGPT-sized catalog, and the oversized response can make setup fail with "Something went wrong with setting up the connection."

ChatGPT-specific behavior

ChatGPT receives a curated allowlist of common tools rather than the standard router surface — see What your AI client sees. If a tool you are granted is not in the curated set, use a full-catalog client such as Claude or Codex for that task.
Write operations only work when Stackyapper is registered as a connector or Action that ChatGPT can call tools through — not when it is attached only as a file-search source. If reads work but writes never appear, check how the connector was registered.

Verify the connection

Ask ChatGPT for a read-only search in an app you can read; a successful call uses a Stackyapper search or read tool and appears under Audit. Follow Connect a client and verify for the full flow.
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