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Bitcoin Mempool Fee Rates
x402
Bitcoin Mempool Fee Rates is a paid API for AI agents from api.chainmarket-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).
Returns current Bitcoin mempool recommended fee rates in sat/vbyte across different priority tiers, sourced from mempool.space
Price / call$0.002
Success—
StatusUnknown
How this service works
Bitcoin network snapshot from mempool.space: recommended fee rates (sat/vB) for fastest, half-hour, hour and economy confirmation, plus the current chain tip height. Live network data; no prices.
Output
Returns a JSON object with the current Bitcoin block tip height, the timestamp of the check, the source URL (mempool.space), and recommended fee rates in sat/vbyte for five priority tiers: fastest, halfHour, hour, economy, and minimum.
Example use cases
Optimal fee for urgent BTC transfer
“I need to send Bitcoin urgently — what's the current fastest fee rate in sat/vbyte so my transaction confirms in the next block?”
Cost-conscious low-priority BTC send
“I'm not in a rush to send some Bitcoin. What's the economy or minimum fee rate right now so I can save on fees?”
Monitoring mempool congestion for DCA bot
“Check the current Bitcoin mempool fee levels — I want to know the fastest, half-hour, and hour fee rates so my bot can decide whether network conditions are cheap enough to execute a buy.”
Technical details
Endpoint
GEThttps://api.chainmarket-api.workers.dev/api/finance/mempool-bitcoin?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need real-time Bitcoin fee rate data without signing up for an API key or managing credentials. It is pay-per-call via x402/USDC micro-payment, making it ideal for agents that need on-demand fee data infrequently. Prefer this over running your own mempool node or managing a separate API subscription when cost per call ($0.002 USDC) is acceptable.
Side effects
- Upstream mempool.space API unavailable — may return 502 or stale data
- Network timeout from Cloudflare Worker — returns error with no charge
- Unexpected schema changes from mempool.space could cause parsing errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"source": "https://mempool.space/api/v1/fees/recommended",
"checkedAt": "2026-10-23T09:36:13.253Z",
"tipHeight": 972749,
"feeRatesSatPerVb": {
"hour": 1,
"economy": 1,
"fastest": 2,
"minimum": 1,
"halfHour": 1
}
}
}Tags
x402
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