Connect MySQL to Codex
Query your MySQL data directly from Codex using Sequel’s MCP server. Ask questions in plain English — no SQL, no dashboards, no context switching.
How it works
Three steps to get started
Connect MySQL to Sequel
In your Sequel dashboard, go to Connections and add MySQL. 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. "Show me total sales by product category last quarter" — and get a real answer backed by live MySQL 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"Example prompts
Questions you can ask Codex
Frequently asked questions
How do I connect MySQL to Codex?
You need two things: (1) connect MySQL 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 MySQL data directly.
What MySQL data can Codex access?
Codex can access any data available through your MySQL 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 MySQL 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 MySQL and generate an API key. Sign up free at sequel.sh — no credit card required. Then create a connection to MySQL and generate an API key from Settings → API Keys.
Can I connect multiple MySQL accounts?
Yes. Sequel supports multiple connections of the same type. If you have multiple MySQL accounts or properties, add each as a separate connection in Sequel. Codex will be able to query all of them.
Connect MySQL to other AI tools
Connect other sources to Codex
Connect MySQL to Codex today
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