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Bitcoin Mempool Pressure State & Projected Next Blocks
x402
Bitcoin Mempool Pressure State & Projected Next Blocks 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 2026-11-02).
Returns the current Bitcoin mempool congestion class (low/normal/high/extreme) and fee projections for upcoming blocks based on backlog and median fee thresholds
Price / call$0.002
Success—
StatusUnknown
How this service works
Bitcoin mempool pressure state and projected next blocks. Class (low/normal/high/extreme) is determined deterministically: extreme if next block median fee >= 50 sat/vB or backlog >= 150 vMB; high if >= 20 sat/vB or >= 60 vMB; normal if >= 3 sat/vB or >= 10 vMB; low otherwise.
Output
Returns the current mempool pressure classification (low, normal, high, or extreme) determined by deterministic thresholds on median fee rate (sat/vB) and backlog size (vMB), along with projected fee data for upcoming Bitcoin blocks (up to the requested maxBlocks count, default 8).
Example use cases
Optimal fee timing for BTC send
“I'm about to send some Bitcoin — can you check whether the mempool is congested right now and tell me if I should wait or go ahead, and what fee rate to use?”
Automated mempool alert dashboard
“Check the Bitcoin mempool pressure state and projected next 10 blocks so I can display it on my crypto dashboard — I need the congestion class and the fee estimates.”
DCA bot pre-send fee check
“Before my recurring Bitcoin purchase goes out, check if the mempool pressure is extreme or high — I only want to broadcast the transaction if it's normal or low congestion.”
Technical details
Endpoint
GEThttps://api.chainmarket-api.workers.dev/api/crypto/btc-mempool-pressure?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a deterministic, pre-classified mempool pressure label (low/normal/high/extreme) plus projected next-block fee rates for Bitcoin, especially when you want a single API call that combines congestion state and fee projection rather than raw mempool stats. Ideal for agents making send/no-send decisions, fee optimization workflows, or user-facing dashboards that need actionable status labels rather than raw numbers.
Side effects
- Upstream Bitcoin node unavailability may cause 503 or empty response
- Invalid maxBlocks value outside 1-10 range may return a 400 error
- Network timeouts if the mempool data feed is slow
- Stale data if the underlying node is syncing or lagging
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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