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Crest Mempool State
x402
Crest Mempool State is a paid API for AI agents from data.crestsystems.ai, paid per call via x402, $0.002/call, status down (last checked 2026-09-15).
Returns current Bitcoin and Base blockchain mempool state including pending transaction counts and Bitcoin fee histogram
Price / call$0.002
Success—
StatusDown
How this service works
Crest · mempool — Fetch current mempool state across chains. Returns Bitcoin pending transaction count, fee histogram, and Base pending transaction count.
Output
Returns current mempool snapshot including Bitcoin pending transaction count, a fee histogram (showing fee rate distribution across pending transactions), and Base chain pending transaction count — useful for estimating confirmation times and appropriate fee levels.
Example use cases
Example prompt
“What's the current state of the Bitcoin mempool — how many transactions are pending and what does the fee histogram look like right now? Also check the Base chain pending TX count.”
Technical details
Endpoint
GEThttps://data.crestsystems.ai/data/mempoolWhen to prefer
Use this endpoint when you need real-time mempool depth data for both Bitcoin and Base in a single call, particularly when deciding on transaction fee levels, estimating confirmation times, or monitoring network congestion. Prefer over on-chain RPC calls when you need a quick, no-setup fee histogram without running your own node.
Side effects
- Upstream blockchain node unavailability may return 503 or empty data
- Stale data if mempool indexer is lagging behind chain tip
- Payment failure (402) if x402 USDC payment not attached or insufficient
- Rate limiting if called too frequently without valid payment
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"paid": true,
"price": "$0.002",
"mempool": {
"base": {
"pending_txs": 191
},
"bitcoin": {
"count": 98033,
"vsize": 38837126,
"total_fee": 11250390,
"fee_histogram": [
[
6.041237,
50013
],
[
4.066206,
60833
],
[
3.124424,
50146
],
[
3.0328233,
51297
],
[
3.0317318,
71491
]
]
}
}
}Tags
x402
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