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₿SatSaver

Free Bitcoin fee widget & API

Live sat/vByte fee rates for your own site. Drop in one line of HTML, or call the JSON API directly. No API key, no signup, no rate limit — use it in anything, commercial projects included. All we ask is that you keep the attribution link.

Theme
340px
Live preview
Paste this into your page
<iframe src="https://satsaver.app/embed/fees?theme=dark" width="340" height="170" style="border:0;max-width:100%"
  title="Live Bitcoin network fees" loading="lazy"></iframe>
<a href="https://satsaver.app">Bitcoin fee data by SatSaver</a>

Or use the API directly

The same data behind the widget and the SatSaver site. CORS is open, so you can call it straight from the browser. Cached for 60 seconds.

GEThttps://satsaver.app/api/fees
{
  "fees": {
    "fastestFee": 3,
    "halfHourFee": 3,
    "hourFee": 1,
    "economyFee": 1,
    "minimumFee": 1
  },
  "mempool": { "count": 81896, "vsize": 40929596, "total_fee": 10827370 },
  "btcPriceUSD": 104231.55,
  "timestamp": 1757692800000
}

Fields

fees.fastestFee
sat/vByte for confirmation in the next block
fees.halfHourFee
sat/vByte targeting ~30 minutes
fees.hourFee
sat/vByte targeting ~1 hour
fees.economyFee
sat/vByte for no particular hurry
mempool.count
unconfirmed transactions waiting
btcPriceUSD
spot price, for converting sats to fiat
timestamp
when the reading was taken (ms since epoch)

Fee data comes from mempool.space. If you build something with this, we'd love to see it — get in touch.

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