MCP servers · Google Sheets · connector · GPT action
Connect ChatGPT to Google Sheets
One line gives ChatGPT your Google Sheets account as tools: 8 endpoints, spreadsheets, values, sheets, called with your own connection. No key in the prompt, a receipt for every call, revoke ChatGPT's access alone any time.
Three steps
- Create a free 0n3 account and connect Google Sheets. Paste a key or sign in; it lands in your vault, encrypted.
- Install 0n3 into ChatGPT. A custom connector in Developer mode, or an Action on a custom GPT from the OpenAPI spec.
- Ask ChatGPT: whoami. Then: "Create a spreadsheet in Google Sheets".
Custom connector (needs Developer mode)
- Settings → Connectors (or Apps) → Advanced → Developer mode on
- Create → name 0n3 · MCP server URL https://0n3.app/mcp · Authentication: OAuth
- Finish the sign-in with your 0n account
- Enable the connector in a chat and ask: "whoami"
ChatGPT connectors cannot send a static header, so 0n3 signs you in through its OAuth door (dynamic client registration is on).
The line above carries a placeholder; 0n3.app/install mints a real key named for ChatGPT and fills it in.
What ChatGPT can then do in Google Sheets
Spreadsheets · Create and get spreadsheet metadata8
Create a spreadsheet
POST /spreadsheetsGet a spreadsheet
GET /spreadsheets/{spreadsheetId}Get values
GET /spreadsheets/{spreadsheetId}/values/{range}Update values
PUT /spreadsheets/{spreadsheetId}/values/{range}Append values
POST /spreadsheets/{spreadsheetId}/values/{range}:appendClear values
POST /spreadsheets/{spreadsheetId}/values/{range}:clearBatch get
GET /spreadsheets/{spreadsheetId}/values:batchGetBatch update
POST /spreadsheets/{spreadsheetId}/values:batchUpdateValues · Read, write, and append cell values0
Read, write, and append cell values
Sheets · Add and remove sheets within a spreadsheet0
Add and remove sheets within a spreadsheet
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