# Obol Bitcoin Timestamp Inversion Anomaly Detector

> Obol Bitcoin Timestamp Inversion 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).

Checks the current Bitcoin chain tip for timestamp inversion anomalies, returning a cryptographically signed result verifiable via Ed25519 public key

## Facts

- Endpoint: GET https://obol-x402.fly.dev/v1/btc/anomaly/timestamp-inversion/latest
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/obol-bitcoin-timestamp-inversion-anomaly-detector-16373e37
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ph5DIbeS9KKNYjwPwDDds

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability obol-bitcoin-timestamp-inversion-anomaly-detector-16373e37
```

Example prompt: Check the latest Bitcoin block for a timestamp inversion anomaly and tell me if one is detected right now, with the signed result I can verify independently.

## When to prefer this

Use this endpoint when you need a real-time, payment-gated, cryptographically verifiable check specifically for Bitcoin timestamp inversion anomalies on the current chain tip — ideal for forensic agents, monitoring pipelines, or compliance tools that require independently auditable results rather than trusting a third-party assertion

## Known failure modes

- Payment not provided or invalid — returns 402 Payment Required
- Bitcoin node unavailable or chain tip data stale — returns 503 or error payload
- Signature verification failure on client side if public key not fetched correctly
- Rate limiting if too many requests within a short window

## How this service works

Bitcoin timestamp inversion anomaly check on chain tip. Validation-gated detector timestamp_inversion for forensic and monitoring agents. Cryptographically signed (Ed25519) — every response is independently verifiable via /.well-known/obol-pubkey.

## Output

Returns a signed JSON response indicating whether a timestamp inversion anomaly is present on the current Bitcoin chain tip, along with relevant block metadata and an Ed25519 cryptographic signature verifiable via the published public key at /.well-known/obol-pubkey

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/obol-bitcoin-timestamp-inversion-anomaly-detector-16373e37/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from obol-x402.fly.dev](https://www.zero.xyz/host/obol-x402.fly.dev/llms.txt)