Cashu: mint health data API

[hroomnik007]

Hey, I'm the author of MintRadar, an open-source site that keeps an eye on public Cashu mints: uptime and latency checked every 5 minutes, plus a history of key, keyset and fee changes.

I saw Zeus lets users pick Cashu mints through NIP-87 discovery. MintRadar could add uptime, latency and input fees for each mint, so users can see how a mint has been running before they add it.

There's a free, read-only API (no key, additive changes only) with filters for method, max input fee, NUTs and unit, plus signed Nostr events (kind 30385) for the health records. Just operational data, no verdict on solvency or custody.

Docs: https://mintradar.org/for-wallets

If a field is missing or a mint is described wrongly, I'd be glad to hear it.

[nisargpatel7042lva]

Operational mint-health data could be a useful addition to mint selection, especially for uptime, latency, supported NUTs, and published input fees.

The data should be presented as operational information rather than a safety or solvency score. A mint being online and responsive does not prove that it is solvent or trustworthy.

A possible integration could include:

• Last health-check timestamp.
• Recent uptime and response latency.
• Supported NUTs and units.
• Reported input fees.
• A link to the raw health record.
• Clear labeling that the data is supplied by an external monitoring service.

It would also be useful to cache the result, show when it was last updated, and allow users to refresh it manually. Signed Nostr records could help verify that the data came from the monitoring service, but the UI should still avoid presenting it as an endorsement.

[hroomnik007]

Thanks, fully agree. That's also how MintRadar describes it: operational data, not a safety or solvency score.

Most of that list is already in the API: last check time, uptime, latency, supported NUTs and units, and input fees per keyset. Responses have an ETag, so caching and a manual refresh are cheap. The raw health records are the signed kind 30385 events on Nostr, so a wallet can link to them or verify them itself.