> ## Documentation Index
> Fetch the complete documentation index at: https://developer.tyms.io/llms.txt
> Use this file to discover all available pages before exploring further.

# ChatGPT

> Connect Tyms MCP to ChatGPT using a custom MCP / Apps connector.

ChatGPT can connect to Tyms through custom MCP connectors (available on supported ChatGPT plans). UI labels may say **Connectors** or **Apps** depending on your plan and product updates.

## Before you start

| Field | Value |
| - | - |
| **Server URL (read-only)** | `https://mcp.tyms.io` |
| **Server URL (read + write)** | `https://mcp.tyms.io/full` |
| **Auth** | OAuth |
| **Client ID** | `usetyms-mcp-chatgpt` |

## Steps

**1. Open connector settings**

Open ChatGPT settings for **Connectors** / custom MCP connectors.

**2. Create a connector**

Create a connector with:

* **Server URL:** `https://mcp.tyms.io` (read-only) or `https://mcp.tyms.io/full` (read + write)
* **Auth:** OAuth
* **Client ID** (when requested): `usetyms-mcp-chatgpt`

**3. Complete Tyms OAuth**

Sign in to Tyms when prompted and approve the business.

**4. Enable the connector in a chat**

Turn the connector on in a chat before asking accounting questions.

## Domain verification (if asked)

> [!TIP]
>
> If ChatGPT asks for a domain verification challenge, Tyms serves it at\
> `https://mcp.tyms.io/.well-known/openai-apps-challenge`.

## Example prompts

> Show expenses for March and highlight the top 5 categories.

> Pull the trial balance and flag any accounts that look unusual.

More: [Example prompts](https://developer.tyms.io/mcp/example-prompts.md).

## Tips

* Start on **read-only** unless you need ChatGPT to create or change records.
* Keep human confirmation on for write actions when using `/full`.
* For other platforms, see [Claude](https://developer.tyms.io/mcp/clients/claude-ai.md), [Perplexity](https://developer.tyms.io/mcp/clients/perplexity.md), or [Other clients](https://developer.tyms.io/mcp/clients/other.md).


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