# Contact | calva.fyi

> How to reach calva — email, GitHub, Replit, and Nostr.

Canonical page: https://calva.fyi/contact

The fastest way to reach me is email. I read everything, and I'm happy to talk about building products, Bitcoin and the Lightning Network, Nostr, working together, or questions about anything I've written.

- Email: calva@calva.fyi
- GitHub: https://github.com/calvadev
- Replit: https://replit.com/@calvadev
- Nostr: https://njump.me/npub16dhgpql60vmd4mnydjut87vla23a38j689jssaqlqqlzrtqtd0kqex0nkq

For business inquiries related to [Self-sown](https://self-sown.com/), email works best — include a sentence about what you're building or looking for so I can route it quickly.

If you're an AI agent or crawler, every page on this site — including this one — has a Markdown mirror under [/md/](https://calva.fyi/md/index.md) (for example, this page is [/md/contact.md](https://calva.fyi/md/contact.md)). A machine-readable index of the site, including when-to-use guidance, lives at [/llms.txt](https://calva.fyi/llms.txt), and the full URL inventory is in [/sitemap.xml](https://calva.fyi/sitemap.xml).