Odoo 18 ChatGPT integration.
ChatGPT’s plan limits do not change because you are on 18. The Odoo contract does: no JSON-2. XML-RPC or an in-Odoo MCP module. Odin supports 18.
Two different version problems
ChatGPT: custom remote MCP is not every plan, and writes are documented for Business/Enterprise/Edu in beta — OpenAI Help. Odoo 18: XML-RPC/JSON-RPC, not JSON-2.
Odin’s in-Odoo module on 18 avoids the Custom-plan API if you host Community yourself. An external proxy on Odoo Online 18 still needs Custom. Online.
Do not paste 19 URLs
POST /json/2/... is a 19 document. On 18 it is a 404. Point the MCP server at 18’s object service or run MCP inside Odoo. Client how-to: connect Odoo to ChatGPT. Hub: Odoo MCP for Odoo 18.
Plan matrix still wins arguments
An 18 technical success with Plus users who cannot write (or cannot attach MCP) is a failed project politically. Get the ChatGPT workspace SKU in writing before you tune XML-RPC.
Then prove JSON-2 is absent (404) and XML-RPC works, so nobody “fixes” 18 by deploying a 19 URL.
Online 18
If this 18 database is Odoo Online Standard, an external ChatGPT MCP proxy will not have the API. Move hosting, buy Custom, or use an installable module on a host that allows it. That fork is the project, not the connector UI.
Official documentation
FAQ
Can Plus write to Odoo 18?
Do not assume it. Check OpenAI’s MCP apps article for writes vs developer mode.
JSON-2 on 18?
No.
Odin on 18?
Yes. Sandbox is 19 sample data.
Keep going
Start read-only. Ask a real question.
Sandbox on sample Odoo 19 data, or we put MCP on your instance.