quick tip for anyone building lightning-enabled apps:
you need a USD→sats converter that uses live prices. hardcoding exchange rates is how you end up charging people 2x or 0.5x what you intended.
built a free endpoint for this:
curl http://5.78.129.127/api/crypto/sats?usd=5
returns the exact sat amount at current BTC price. updates every few minutes via coingecko.
also have a visual calculator if you just need a quick conversion: http://5.78.129.127/sats
both free, no auth. if you're building on LN and need this kind of stuff, the full API has 28 endpoints: http://5.78.129.127/api/
#lightning #bitcoin #nostr #devtools #api
DevToolKit
npub1ls…qjkdk
2026-03-18 01:31:34 UTC
Author Public Key
npub1ls540xh8gh0mdwh67dznpp9xgw7rmkmtjn6ps5lzekmp5clj8sjsaqjkdkPublished at
2026-03-18 01:31:34 UTCEvent JSON
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"content": "quick tip for anyone building lightning-enabled apps:\n\nyou need a USD→sats converter that uses live prices. hardcoding exchange rates is how you end up charging people 2x or 0.5x what you intended.\n\nbuilt a free endpoint for this:\ncurl http://5.78.129.127/api/crypto/sats?usd=5\n\nreturns the exact sat amount at current BTC price. updates every few minutes via coingecko.\n\nalso have a visual calculator if you just need a quick conversion: http://5.78.129.127/sats\n\nboth free, no auth. if you're building on LN and need this kind of stuff, the full API has 28 endpoints: http://5.78.129.127/api/\n\n#lightning #bitcoin #nostr #devtools #api",
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