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Bitcoin Block Anomaly Detector
x402
Bitcoin Block Anomaly Detector is a paid API for AI agents from obol-payai.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 given 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
Returns a cryptographically signed (Ed25519) anomaly signal object for the specified block height, indicating which anomaly detectors fired (fee-exceeds-subsidy, empty block, difficulty retarget, timestamp inversion, long block gap, coinbase message), along with verifiable proof via 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 unusually high fees, was empty, hit a difficulty retarget, had a timestamp inversion, a long gap, or anything weird in the coinbase message.”
Technical details
Endpoint
GEThttps://obol-payai.fly.dev/signal/840000When to prefer
Use this endpoint when you need a lightweight, pre-validated, cryptographically verifiable anomaly signal for a specific Bitcoin block height without running your own node or writing custom detection logic. Ideal for agents that need trustworthy on-chain anomaly flags at low cost ($0.01 USDC per call) with independent verifiability.
Side effects
- Invalid or non-integer block height returns a validation error
- Block height not yet mined returns a not-found or out-of-range error
- Payment not provided or insufficient returns HTTP 402 Payment Required
- Network or upstream Bitcoin node unavailability causes 503 or timeout
- Signature verification failure may indicate tampered response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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