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Bitcoin Mempool Backlog Stats
x402
Bitcoin Mempool Backlog Stats is a paid API for AI agents from obol-x402.fly.dev, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).
Returns real-time Bitcoin mempool telemetry including pending transaction count, backlog vsize, and estimated blocks to clear, with Ed25519 cryptographic signature on every response.
Price / call$0.01
Success—
StatusDown
How this service works
Bitcoin mempool backlog stats: pending tx count, backlog vsize, estimated blocks. Mempool congestion telemetry for timing agents. Cryptographically signed (Ed25519) — every response is independently verifiable via /.well-known/obol-pubkey.
Output
Returns a JSON object containing pending transaction count in the mempool, total backlog size in virtual bytes (vsize), estimated number of blocks until the backlog clears, and an Ed25519 cryptographic signature verifiable via the service's public key endpoint.
Example use cases
Optimal Bitcoin withdrawal timing for exchanges
“Check the Bitcoin mempool right now — I need to know if it's a good time to withdraw my Bitcoin from the exchange, or if I should wait for the backlog to clear and fees to drop.”
Auto-batch transactions during low congestion
“Monitor the Bitcoin network congestion and tell me when there are fewer than 50,000 pending transactions so I can batch my withdrawals together at a lower fee rate.”
Real-time fee pressure alerts for traders
“What's the Bitcoin mempool looking like right now? Give me the pending transaction count, vsize backlog, and estimated blocks — I need to decide whether to execute my trade settlement today or wait for better conditions.”
Technical details
Endpoint
GEThttps://obol-x402.fly.dev/v1/btc/mempoolWhen to prefer
Use this endpoint when an agent needs to time a Bitcoin transaction send optimally based on current network congestion, or when a workflow needs to make fee-rate decisions. Prefer this over general blockchain explorers when you need a verifiable, signed response with congestion-specific telemetry (pending count, vsize, estimated blocks) rather than raw block data. The Ed25519 signature makes it suitable for pipelines that require tamper-evident data provenance.
Side effects
- Upstream Bitcoin node unavailable — returns 5xx error
- Payment not received or insufficient — returns 402 Payment Required
- Rate limit exceeded — returns 429
- Mempool data temporarily stale — may return cached data with timestamp
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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