# Model Source, by Xpansion

> Find the AI model your project really needs, not the one everyone says is best. Model Source is a free MCP connector: it works out what an AI job really needs (discovery), ranks
> models on independent evidence, and tests the shortlist on the person's own tasks. XF Model Watch is the paid
> subscription that re-tests saved jobs as new models arrive.

- Connect: add https://xfms.xpansion.dev/mcp as an HTTP MCP server and sign in with an email. Free.
- Tools: discover, rank, pick, benchmark, compare, field_results, watch_job.
- Comparisons run on the person's own OpenRouter key (X-OpenRouter-Key header); Model Watch subscribers get included comparisons.
- XF Model Watch: Solo $19/month (3 jobs, weekly), Team $49/month (10 jobs, also within a day of relevant new models),
  Agency $149/month (40 jobs by client); yearly at 10x monthly; 14-day money-back promise; never switches models for you.
- Privacy: nothing the person writes is kept; Model Watch keeps a job only with consent, encrypted.

## Pages
- [Home](https://xfms.xpansion.dev/): what Model Source does
- [Help](https://xfms.xpansion.dev/docs): how to connect and use each tool
- [XF Model Watch](https://xfms.xpansion.dev/watch): plans and prices
- [Test results](https://xfms.xpansion.dev/results): daily real tests of models on realistic jobs
- [Privacy](https://xfms.xpansion.dev/privacy) and [Terms](https://xfms.xpansion.dev/terms)