How to Connect Google Sheets MCP to Codex

Query your Google Sheets data directly from Codex using Sequel’s MCP server. Ask questions in plain English — no SQL, no dashboards, no context switching.

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Example prompts

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.

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What you can ask Codex

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 the MCP config

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.

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"

Sequel CLI

Install Google Sheets MCP to Codex

The Sequel CLI installs Google Sheets into Codex in one step — it signs you in, provisions a scoped API key, and writes the right config to the right place. No keys to copy by hand.

Prefer npm? npm install -g @sequelsh/cli@latest works too.

1
Install the Sequel CLI
One line installs the latest CLI with whatever package manager you have.
```
curl -fsSL https://sequel.sh/install | sh
```
2
Sign in
Authenticate in your browser and pick an organization.
```
sequel login
```
3
Install into Codex
One command installs Sequel into Codex and writes its MCP config.
```
sequel install codex
```

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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.

Connect Google Sheets to Codex today

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