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Bitcoin Mempool Fee Estimator
x402
Bitcoin Mempool Fee Estimator is a paid API for AI agents from data.greeneris.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Returns current Bitcoin network fee rates (sat/vB) for different confirmation speeds, plus optional difficulty adjustment data, sourced live from mempool.space
Price / call$0.001
Success—
StatusUnknown
How this service works
Recommended Bitcoin transaction fee rates in sat/vB (fastest, half-hour, hour, economy, minimum) from mempool.space, computed from the live mempool. Optional ?include=difficulty adds the current difficulty retarget estimate (change %, remaining blocks/time). No required params; served with a 60s cache.
Output
A JSON object with fee rates in sat/vB for five confirmation speed tiers (fastest, half_hour, hour, economy, minimum), sourced from a live mempool snapshot. When the optional `include=difficulty` query param is provided, also includes difficulty adjustment data: progress percent, remaining blocks, remaining time in ms, estimated difficulty change percent, and estimated retarget date as a Unix timestamp in ms.
Example use cases
Wallet fee estimation for transactions
“I'm about to send some Bitcoin. What's the current fastest and economy fee rate so I can choose between quick confirmation and saving on fees?”
Monitor network congestion trends
“Check the Bitcoin network fees right now and tell me if it's congested or if I should wait before broadcasting my transaction.”
Schedule transaction timing strategically
“What are today's Bitcoin sat/vB rates for hour-long confirmation, and when does the difficulty adjustment happen next? I want to time my transaction well.”
Technical details
Endpoint
GEThttps://data.greeneris.io/v1/btc/feesWhen to prefer
Use this endpoint when you need real-time Bitcoin fee rate data for transaction construction, wallet fee estimation, or monitoring network congestion. It is particularly useful for AI agents that need to pay or broadcast Bitcoin transactions and want to select the appropriate fee tier. Prefer this over on-chain analysis tools when you need a quick, cheap ($0.001) per-call lookup with no account setup required, paying via x402/USDC on Base.
Side effects
- HTTP 402 returned if payment not provided — includes machine-readable USDC quote for x402 protocol payment
- mempool.space upstream outage may cause stale or unavailable data
- Invalid query parameter value for `include` field returns an error
- Network timeout if Bitcoin node data is temporarily unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"source": "mempool.space (live mempool snapshot)",
"fees_sat_per_vb": {
"hour": 1,
"economy": 1,
"fastest": 2,
"minimum": 1,
"half_hour": 1
},
"difficulty_adjustment": {
"progress_percent": 11.06,
"remaining_blocks": 1793,
"remaining_time_ms": 1093000000,
"difficulty_change_percent": -2.74,
"estimated_retarget_date_ms": 1753728000000
}
}
}Tags
x402
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