How to Connect Google Sheets to Codex
Query your Google Sheets data directly from Codex using Sequel’s MCP server. Ask questions in plain English, with no SQL, no dashboards, and no context switching.
Short answer
Connect Google Sheets to Sequel, then add Sequel's MCP server to Codex using the config on this page. Codex can then query your live Google Sheets data in plain English, with no connector code and no CSV exports. Both steps take a few minutes.
Everything you can ask Codex about your Google Sheets data.
Ask in plain English — Sequel translates it into a Google Sheets query, runs it, and Codex hands back the answer. No SQL, no dashboards, no CSV exports.
- What sheets are in this spreadsheet?
- Show me the first 50 rows from the Sales sheet
- Add a new row to the Leads sheet with name John and email john@example.com
- What are the column headers in the Inventory sheet?
- Update cell B2 in the Budget sheet to 5000
How it works
Three steps to get started
Connect Google Sheets to Sequel
In your Sequel dashboard, go to Connections and add Google Sheets. Sequel handles authentication and schema discovery automatically.
Add Sequel to the agent
Copy the Sequel MCP configuration into Codex's settings file (shown below). Swap in your API key from Settings → API Keys.
Ask Codex about your data
Restart Codex and start asking questions. "What sheets are in this spreadsheet?" — and get a real answer backed by live Google Sheets data.
Why Codex
What Codex does with your Google Sheets data
Grounded answers from real data
Codex with Sequel queries your actual databases before generating code or explanations. Every schema reference, column name, and data shape is verified against what's really there.
Terminal-native data access
No context switching — Codex can pull database data mid-session to inform code generation, write migrations based on actual schemas, and validate assumptions without leaving the terminal.
Agentic data workflows
Codex's multi-step agent can chain Sequel tool calls together: discover schema, sample data, run analysis, then generate code — all in one automated flow.
Configuration
Add Sequel to Codex
Place this in ~/.codex/config.yaml and replace sql_your_api_key with a key from Settings → API Keys.
~/.codex/config.yaml
mcp_servers:
sequel:
type: http
url: https://api.sequel.sh/mcp
headers:
Authorization: "Bearer sql_your_api_key"Install
Install Google Sheets MCP in Codex
Pick your app and Sequel installs itself: a one-click link where the client supports it, that client’s own few steps where it doesn’t. Every route signs in with your Sequel account over OAuth, so there is no API key to copy and nothing to keep in sync.
Already have an MCP client?
https://api.sequel.sh/mcp
Add it as a remote (streamable HTTP) server and sign in when prompted. Skills come with it; nothing else to install. Manual setup per client
Add Sequel to Codex
Terminal
codex mcp add sequel --url https://api.sequel.sh/mcp
- 1Run the command in your terminal. It writes the server to ~/.codex/config.toml.
- 2Run codex mcp login sequel and sign in in the browser.
- 3Start Codex and ask a question.
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Add Sequel once in ChatGPT and your dot can answer data questions on its own, day and night.
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Frequently asked questions
How do I connect Google Sheets to Codex?
You need two things: (1) connect Google Sheets to Sequel in your Sequel dashboard under Connections, and (2) add the Sequel MCP config to Codex using the setup shown above. Once both are done, Codex can query your Google Sheets data directly.
What Google Sheets data can Codex access?
Codex can access any data available through your Google Sheets connection in Sequel. Use Sequel's search tool to discover available metrics and dimensions, then execute queries to pull the data you need.
Is my Google Sheets data sent to Codex's servers?
Query results are returned to Codex as context within your conversation. Only the data you explicitly ask about is retrieved. Sequel never stores your query results permanently — they exist only for the duration of the tool call.
Do I need a Sequel account?
Yes. You need a Sequel account to connect Google Sheets and generate an API key. Sign up free at sequel.sh — no credit card required. Then create a connection to Google Sheets and generate an API key from Settings → API Keys.
Can I connect multiple Google Sheets accounts?
Yes. Sequel supports multiple connections of the same type. If you have multiple Google Sheets accounts or properties, add each as a separate connection in Sequel. Codex will be able to query all of them.
How do I configure Sequel for Codex CLI?
Add the Sequel MCP server to ~/.codex/config.yaml as shown above. Create the file if it doesn't exist. Replace `sql_your_api_key` with a real key from Settings → API Keys, then restart Codex.
Does Codex CLI support HTTP MCP servers?
Yes. Codex CLI supports MCP over HTTP (Streamable HTTP transport). The `type: http` field in the config tells Codex to use this transport when connecting to Sequel.
Can I limit which databases Codex can access?
Sequel MCP is scoped to your organization's connected data sources. You can create separate API keys for different environments and revoke them at any time from Settings → API Keys.
Is this the same as the original OpenAI Codex model?
No — Codex CLI is OpenAI's agentic terminal coding tool, separate from the original Codex language model. It uses the latest OpenAI models (GPT-4o and o-series) with MCP tool support.
How do I connect a Google Sheet?
Click 'New Connection', select Google Sheets, paste the URL of your Google Sheet, then click 'Connect with Google'. After authorising, Sequel verifies it can access that spreadsheet and creates the connection. One connection per spreadsheet — add more connections for additional sheets.
Can Sequel write to my spreadsheet?
Yes. Sequel requests read and write access to Sheets. You can append rows, update cells, and add new sheet tabs through the AI chat. Sequel will only modify the spreadsheet when you explicitly ask it to.
Can I connect multiple spreadsheets?
Yes. Each Sequel connection represents one spreadsheet. Create multiple connections if you need to query data across several spreadsheets.
Does Sequel have access to all my Google Drive files?
No. Sequel only requests access to the Google Sheets API, scoped to the specific spreadsheet you connect. It cannot read, list, or modify any other files in your Google Drive.
Connect Google Sheets to Codex today
Sign up free, connect your data sources, and start querying in minutes.