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Obol Bitcoin Block Anomaly Detector
x402
Obol Bitcoin Block Anomaly Detector 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).
Detects and returns on-chain anomaly signals for a specific Bitcoin block height, including fee-exceeds-subsidy, empty block, difficulty retarget, timestamp inversion, long block gap, and coinbase message anomalies.
Price / call$0.01
Success—
StatusDown
How this service works
Validation-gated Bitcoin block anomaly detector / on-chain anomaly signal for a block height: fee-exceeds-subsidy, empty block, difficulty retarget, timestamp inversion, long block gap, coinbase message. Only truth-tested detectors are served. Free height list: GET /examples. Cryptographically signed (Ed25519) — every response is independently verifiable via /.well-known/obol-pubkey.
Output
A cryptographically signed (Ed25519) JSON response listing which anomaly signals triggered for the requested block height, such as fee-exceeds-subsidy, empty block, difficulty retarget, timestamp inversion, long block gap, and coinbase message anomaly. The signature can be independently verified against the public key at /.well-known/obol-pubkey.
Example use cases
Example prompt
“Check Bitcoin block 840000 for any on-chain anomalies — I want to know if it had unusual fees, was empty, hit a difficulty retarget, had a timestamp inversion, a long gap from the prior block, or a weird coinbase message.”
Technical details
Endpoint
GEThttps://obol-x402.fly.dev/signal/840000When to prefer
Use this endpoint when you need a truth-tested, cryptographically verifiable anomaly signal for a specific Bitcoin block height — especially useful for trading agents, research tools, or monitoring pipelines that need to flag unusual block conditions like fee spikes, empty blocks, or retargets at a known height. Prefer over raw RPC calls when you want pre-classified anomaly labels with cryptographic provenance.
Side effects
- Block height not found or not yet mined — returns 404 or error
- Invalid block height format (non-integer) — returns 400 bad request
- Payment not included or insufficient — returns 402 Payment Required
- Block height outside supported range — endpoint may return error
- Service unavailable on fly.dev — returns 503
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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