SERVICE

crypto-onchain

Xynaptic Crypto Onchain — live Bitcoin network data: recommended fees, mempool congestion, difficulty adjustment and hashrate context. Real-time from mempool.space.

$0.1 per call · /v1/crypto-onchain

Call it

curl -s https://api.xynaptic.io/v1/crypto-onchain \
  -H "Accept: application/json"

# -> 402 Payment Required (x402 challenge: price, payTo, networks)
# -> sign the payment, retry with PAYMENT-SIGNATURE -> 200

What you get back

{
  "service": "crypto-onchain",
  "generated_at": "2026-09-23T10:00:00Z",
  "network": {
    "fastest_fee_sat_vb": 3,
    "mempool_tx_count": 88234
  },
  "summary": "Bitcoin network healthy: low fees, low congestion."
}