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Mempool

Recommended Bitcoin fee rates straight from a mempool explorer

🪙 Crypto & Web3HEALTHYchecked 10h ago
AUTH NONECORS ✓AGENT ✓HTTPS ✓COMMERCIAL ?

Mempool.space runs an open Bitcoin explorer and exposes a keyless REST API over its live mempool. The recommended-fees endpoint returns suggested sat/vB rates for fastest, half-hour, hour, economy, and minimum confirmation targets. Useful for wallets estimating what to pay before broadcasting a transaction.

95HOW IT'S SCORED ⓘ
▶ Run liveDocs ↗
Status badge · for your READMEshipapis health badge: 95 · healthy
Uptime history
92.7%90 days
94.8%30 days
68P50 · ms
1221P95 · ms
operationalpartialdownno data
Response time · last 48 checks
Fastest 19 ms, slowest 660 ms, most recent 67 ms.
Live response samplecaptured by our last successful check
GET https://mempool.space/api/v1/fees/recommended

{
  "fastestFee": 2,
  "halfHourFee": 1,
  "hourFee": 1,
  "economyFee": 1,
  "minimumFee": 1
}
Call itcurl · fetch · python
curl "https://mempool.space/api/v1/fees/recommended"
const res = await fetch("https://mempool.space/api/v1/fees/recommended");
const data = await res.json();
console.log(data);
import requests

res = requests.get("https://mempool.space/api/v1/fees/recommended")
print(res.json())
Endpoints · 6HealthyFULL DOCS ↗
Monitored path responding — GET /v1/fees/recommended68 mschecked 10h ago
GET/v1/fees/recommendedPROBED

Recommended Bitcoin fee rates straight from a mempool explorer

GET/v1

V1 — documented GET route.

GET/v1/1

V1 details by ID (example: 1).

GET/v1?limit=10

V1 — documented GET route.

GET/v1/search?q=test

Search by query parameters.

GET/v1/

V1 — documented GET route.

Machine-readable spec

We probe a documented GET and expect 2xx JSON — full uptime and health score. Export includes every documented route below.

Response-shape history

Stable. No schema drift observed since monitoring began — the response shape has not changed under our checks.

Mempool: common questions

Is Mempool free to use?

Yes — Mempool is a free crypto & web3 API. Free tier: Free public API; no key for basic usage. Whether the free tier allows commercial use is unclear — check the provider docs.

Does Mempool need an API key?

No — Mempool needs no API key or signup. You can call it straight away; rate limits still apply (Enforced — HTTP 429 on excess, repeated abuse may be banned; numeric limits unpublished).

Can I call Mempool from the browser?

Yes — Mempool returns CORS headers over HTTPS, so front-end code can fetch it directly with no backend proxy. Use the fetch snippet on this page, or hit "Run live" to try it now.

Is Mempool up right now?

As of our last scheduled check, Mempool is healthy with 92.7% uptime over 90 days and a 68 ms median response. We re-probe it every sweep — the status badge and uptime chart above always show the latest.