ChatGPT
Connect ChatGPT to the FinologeeBKO MCP server as a custom connector
Introduction
ChatGPT connects to the FinologeeBKO MCP server as a custom connector, letting you drive the platform through natural-language interaction. ChatGPT acts under your existing FinologeeBKO rights and follows the same signatory-rule approvals that apply elsewhere on the platform.
Prerequisites
Before connecting, make sure you have:
- The MCP server enabled for your tenant. Contact [email protected] to request it.
- Your MCP endpoint URL and OAuth client ID. See MCP server for where to find these.
- A ChatGPT plan that supports custom connectors.
Connecting the connector
Add the MCP server as a custom MCP server in ChatGPT:
-
Select Add new plugin, then Add custom MCP server
-
Set the MCP server URL to your endpoint URL, for example
https://<your-tenant-host>/mcp -
Open Advanced OAuth Settings and set:
- Registration method — User-defined OAuth client
- OAuth Client ID — your client ID
- Client secret — leave empty
- Token endpoint auth method —
none
ChatGPT fills in the Scopes, OpenID support and OAuth endpoints automatically.
-
Select Create as a plugin
-
Continue with authentication, as described below
Set the token endpoint auth methodIf the token endpoint auth method is left at its default, ChatGPT fails to create the connector with the error "Error creating connector: Client secret is required". Setting it to
noneresolves this, because the FinologeeBKO client is public and requires no secret.
Authenticating
Save the connector and connect. A browser opens at the FinologeeBKO login page. Sign in with your credentials. The connector turns to connected and its bko__* tools become available.
Verifying the connection
Confirm the connection is working:
- Check that tools appear namespaced
bko__<domain>__<verb>, for example:bko__cash_account__find_cash_accountsbko__counterparty__get_counterpartiesbko__credit_transfer__create
- Ask ChatGPT something that uses a tool, such as "list cash accounts", and confirm the tool runs.
Troubleshooting
| Symptom | Cause and fix |
|---|---|
| Error creating connector: Client secret is required | The token endpoint auth method is at its default. Set it to none. |
| Browser redirect or callback is rejected | The redirect URI is not registered for your client. Contact [email protected]. |
| Tools are missing, or a tool call is denied after connecting | Your account lacks the FinologeeBKO rights required for that action. Each tool requires its own permission. Review your permissions with your administrator. |
Related documentation
Explore related sections for more information:
- MCP server - Overview, rights, and connection values - Concepts, the rights model, and where to find your MCP URL and client ID
- Claude - Connect Claude to the MCP server - Setup for the Claude Code CLI, Claude Desktop, and claude.ai web
- Mistral - Connect Mistral to the MCP server - Setup for the Mistral Vibe custom connector
- Microsoft Copilot Studio - Connect a Copilot Studio agent to the MCP server - Setup for Microsoft Copilot Studio agents
- Permissions - Access control and role-based permissions - Understanding the rights enforced for every MCP tool invocation
Support
For assistance connecting ChatGPT to the MCP server, contact [email protected].
Updated 18 days ago