How to Connect Amplitude to Codex
Query your Amplitude 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 Amplitude to Sequel, then add Sequel's MCP server to Codex using the config on this page. Codex can then query your live Amplitude 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 Amplitude data.
Ask in plain English — Sequel translates it into a Amplitude query, runs it, and Codex hands back the answer. No SQL, no dashboards, no CSV exports.
- What's the 7-day retention for users who signed up last month?
- Show me the conversion funnel from signup to first paid action over the past 30 days.
- Which onboarding step has the biggest drop-off?
- How many users triggered 'Subscription Started' last week, by plan?
- Daily active users for the past 90 days, segmented by platform.
How it works
Three steps to get started
Connect Amplitude to Sequel
In your Sequel dashboard, go to Connections and add Amplitude. 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's the 7-day retention for users who signed up last month?" — and get a real answer backed by live Amplitude data.
Why Codex
What Codex does with your Amplitude 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 Amplitude 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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Tell your Grok bot to add Sequel and it can query every database and marketing tool you've connected.
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Give Meta's Muse one message and it builds its own connector to every source you've put in Sequel.
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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 Amplitude to Codex?
You need two things: (1) connect Amplitude 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 Amplitude data directly.
What Amplitude data can Codex access?
Codex can access any data available through your Amplitude 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 Amplitude 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 Amplitude and generate an API key. Sign up free at sequel.sh — no credit card required. Then create a connection to Amplitude and generate an API key from Settings → API Keys.
Can I connect multiple Amplitude accounts?
Yes. Sequel supports multiple connections of the same type. If you have multiple Amplitude 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 Amplitude to Sequel?
Open Amplitude → Settings → Projects → [your project] → General, copy the API Key and Secret Key, pick your region (US or EU), and paste them into Sequel's Amplitude connector. Sequel uses HTTP Basic auth with these keys against Amplitude's read APIs — no OAuth dance required.
Which Amplitude region should I pick?
Use the region the project was created in. US projects live on amplitude.com; EU projects live on analytics.eu.amplitude.com. If queries return 401 or empty results, the region is almost always the culprit — switch it and re-test.
Can Sequel write or modify data in Amplitude?
No. The connector only ships read-only tools: list events, list event properties, get chart, funnel report, retention report, and event segmentation. There is no write endpoint exposed to the agent, so Sequel cannot create events, charts, or cohorts on your behalf.
Do you support saved charts and dashboards?
Yes — if you already built a chart in Amplitude, share its chart ID with Sequel and it will pull the result via the Dashboard REST API, then re-segment or compare it conversationally without you re-creating it.
Connect Amplitude to Codex today
Sign up free, connect your data sources, and start querying in minutes.