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Bitcoin Mempool Stats
x402
Bitcoin Mempool Stats 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).
Fetches real-time Bitcoin mempool statistics including transaction count, fee rates, mining difficulty, and halving countdown from mempool.space
Price / call$0.002
Success—
StatusUnknown
How this service works
Bitcoin mempool congestion from mempool.space: unconfirmed transaction count and size, recommended fee rates in sat/vB, difficulty-adjustment progress and estimated retarget date, and blocks until the next halving (every 210,000 blocks). Current snapshot only; no history.
Output
Returns a JSON object with: current mempool transaction count, total mempool vsize in vBytes, total fees in satoshis, fee rates for fastest/half-hour/hour/economy/minimum in sat/vByte, current block tip height, mining difficulty progress percentage, remaining blocks to retarget, expected difficulty change percentage, estimated retarget date, next halving block height, and blocks until the next halving. Also includes the data source URL and timestamp of the check.
Example use cases
Optimal Bitcoin transaction fee timing
“What's the cheapest fee rate I can use to get my Bitcoin transaction confirmed within the next hour, and how backlogged is the mempool right now?”
Bitcoin halving countdown tracker
“How many blocks are left until the next Bitcoin halving, and what's the current block height?”
Mining difficulty adjustment monitor
“What percentage through the current Bitcoin difficulty epoch are we, and when is the next estimated retarget date?”
Technical details
Endpoint
GEThttps://api.chainmarket-api.workers.dev/api/crypto/bitcoin-mempool-stats?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a single unified snapshot of Bitcoin network health — combining mempool backlog, fee rates, difficulty adjustment progress, and halving countdown in one call. Prefer this over raw mempool.space API access when you need pay-per-call billing with no signup, or when integrating into an x402-compatible agent workflow. Best for real-time fee estimation, network monitoring dashboards, or halving event tracking.
Side effects
- Upstream mempool.space API unavailable — stale or missing data returned
- Network timeout from the Cloudflare Worker proxy
- Occasional brief staleness if mempool.space data feed is delayed
- Payment failure results in no charge and no data returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"source": "https://mempool.space/api/mempool",
"mempool": {
"txCount": 49426,
"vsizeVb": 25287373,
"totalFeesSats": 5068478
},
"checkedAt": "2026-10-23T09:35:55.649Z",
"tipHeight": 972749,
"difficulty": {
"progressPct": 51.44,
"remainingBlocks": 979,
"expectedChangePct": 4.87,
"estimatedRetargetDate": "2026-10-29T21:20:41.027Z"
},
"feeRatesSatPerVb": {
"hour": 1,
"economy": 1,
"fastest": 2,
"minimum": 1,
"halfHour": 1
},
"nextHalvingHeight": 1050000,
"blocksUntilHalving": 77251
}
}Tags
x402
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