Use Metix AI Platform in Codex and the OpenAI API
Codex gets ten tools for people, job postings and companies with one command, and the key stays in your environment rather than in its config.
CodexWorks today- OpenAI Responses APISupported
- ChatGPTSupported
Free plan: 100 API Credits once, no card.
Codex>Find five data engineer postings in the US from this month.
●metixmetix_query_jobs
{"where": {"all": [{"field": "title", "match": "data engineer"}, {"field": "location.country", "match": "United States"}, {"field": "posted_date", "gte": "2026-09-01"}]}, "size": 25}
↳ 25 job_ids · 1 API Credit
●metixmetix_get_jobs
{"job_ids": [5 ids]}
↳ 5 records · 1 API Credit
Five of this month's postings, newest first:
- Senior Data EngineerCloud data platform · Seattle
- Data EngineerPayments company · New York
- Data Engineer, ClaimsHealth insurer · Chicago
- Staff Data EngineerLogistics marketplace · Austin
- Analytics EngineerStreaming service · Remote, US
2 API Credits · an illustration, not live data
Codex reads the key from METIX_KEY each time it calls the server, so the key is never written into config.toml.
codex mcp add metix \
--url https://mira-api.metix.ai/mcp \
--bearer-token-env-var METIX_KEYThen
Run codex mcp get metix and expect transport: streamable_http. The agent skills install for Codex too, and the two work well together.
Ask it first
Which companies posted data engineer roles in the US this month?The Responses API calls the server for you when you pass it as an mcp tool. It does not store the header, so send it with every request.
curl https://api.openai.com/v1/responses \
-H "Authorization: Bearer $OPENAI_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5",
"tools": [{
"type": "mcp",
"server_label": "metix",
"server_url": "https://mira-api.metix.ai/mcp",
"headers": { "Authorization": "Bearer '"$METIX_KEY"'" },
"require_approval": "never"
}],
"input": "Find three open data engineer roles in Austin."
}'Then
The output lists the tools it imported and each call it made, followed by the model's answer.
In the apps
These apps add tools through their own connector settings. The quickest start is the tool beside each, which takes your key directly.
- ChatGPT · quickest with CodexSupported
Questions
Can I add it to ChatGPT?
ChatGPT adds connectors in its own settings and decides which sign-in it accepts. The quickest start is Codex or the OpenAI Responses API, which take your key directly.
What does it cost?
The same as any other use of the API. A search costs one API Credit per 25 results and reading records costs one per 5; natural-language search adds a 5 API Credit base. The free plan includes 100 API Credits once, with no card.
Can I limit what an agent spends?
Yes. On the API keys page, give the key the agent uses a cap in API Credits. Many agents call tools without asking you each time, and a capped key stops at the cap. Revoking a key stops it on the next call.
Why did one question cost hundreds of API Credits?
Questions that rank or count across everything, such as "which companies posted the most data engineer roles", have no single call that answers them, so an agent may read every match to count it. In one test, Grok Build pulled all 8,799 matching postings for that question and used about 390 API Credits. Ask for a handful instead ("five recent data engineer postings"), keep a cap on the key, and ask the agent to tell you before a call returns more than 100 results.
Can it find email addresses or phone numbers?
Yes, for any account that has paid, a plan or a top-up, billed per value found: 3 API Credits for a work email, 8 for a personal email, 15 for a phone. Unlock is a REST call, not an MCP tool, so install the skills and the agent makes the call for you. The Platform does not send outreach or book interviews; for that, use Mira at metix.ai.
Mira Credits or API Credits?
API Credits. They are the Metix AI Platform's usage unit. Mira Credits, sold with hiring plans on metix.ai, are a different unit, and the two are not interchangeable.
Claude and Claude Code are trademarks of Anthropic. ChatGPT, Codex and OpenAI are trademarks of OpenAI. Grok is a trademark of xAI. Muse and Meta are trademarks of Meta Platforms. The Metix AI Platform is not affiliated with, sponsored by or endorsed by any of them.