# ESP/ESN Replay Window Integrity Validator

> ESP/ESN Replay Window Integrity Validator is a paid API for AI agents from detect.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-11-04).

Validates claimed ESN high-water marks and admission decisions from a synthetic ESP replay-filter window, verifying integrity predicates and packet-level state against asserted summary statistics.

## Facts

- Endpoint: POST https://detect.halowerk.com/v1/F-B-NIGHT-ESP_ESN_AUTHENTICATED_REPLAY_WINDOW/esp-esn-inference-authenticated-replay-window?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-04
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/esp-esn-replay-window-integrity-validator-eac56a0c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n67g8ysQsvFmlXn5dwo8X

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 esp-esn-replay-window-integrity-validator-eac56a0c -d '<json body>'
```

Example prompt: Verify this ESP replay window artifact before we adopt it: the window size is 64, normal_synchronization is true, and I have a list of 10 packets with their sequence low values and integrity flags, plus claimed decisions and high-water marks — check that the summary claims (e.g. 8 admitted, 1 duplicate, 1 integrity-failed) are consistent with the per-packet data.

## When to prefer this

Use this endpoint when an AI agent needs to independently verify the integrity and correctness of an ESP replay-window state artifact before trusting or adopting a replay filter model — particularly when the claimed summary statistics and per-packet decisions originate from an untrusted or synthetic source and must be audited against raw packet-level data before being acted upon.

## Known failure modes

- Mismatched packet count between artifact.packets array and claims.packets total
- Claimed admitted_packets count inconsistent with per-packet integrity flags
- claimed_high or claimed_decisions arrays length mismatch with packets array
- Window size out of allowed range 1-128
- seen_offsets values out of valid range 0-127
- Malformed artifact object missing required fields
- Integrity predicate inconsistency detected — validation rejects the artifact
- Schema validation error on input payload

## How this service works

Prüft die behaupteten rekonstruierten ESN-Hochwörter und Zustandsentscheidungen eines synthetischen ESP-Empfangsfensters, bevor ein Agent ein Wiederholungsfiltermodell übernimmt; Integritätsprüfungen werden als vorgegebene Prädikate konsumiert.

## Output

A verification outcome indicating whether the claimed ESN high-water marks, admission decisions, and summary statistics (admitted, duplicate, integrity-failed, zero-sequence packet counts, predicates used, final window occupancy) are consistent with and authenticated against the per-packet artifact data provided.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "artifact": {
   "type": "object",
   "required": [
    "normal_synchronization",
    "window",
    "top",
    "seen_offsets",
    "packets",
    "claimed_high",
    "claimed_decisions",
    "claims"
   ],
   "properties": {
    "top": {
     "type": "array",
     "items": {
      "type": "integer",
      "maximum": 4294967295,
      "minimum": 0
     },
     "maxItems": 2,
     "minItems": 2
    },
    "claims": {
     "type": "object",
     "required": [
      "packets",
      "admitted_packets",
      "duplicate_packets",
      "integrity_failed_packets",
      "zero_sequence_packets",
      "integrity_predicates_used",
      "final_window_occupied"
     ],
     "properties": {
      "packets": {
       "type": "number"
      },
      "admitted_packets": {
       "type": "number"
      },
      "duplicate_packets": {
       "type": "number"
      },
      "final_window_occupied": {
       "type": "number"
      },
      "zero_sequence_packets": {
       "type": "number"
      },
      "integrity_failed_packets": {
       "type": "number"
      },
      "integrity_predicates_used": {
       "type": "number"
      }
     },
     "additionalProperties": false
    },
    "window": {
     "type": "integer",
     "maximum": 128,
     "minimum": 1
    },
    "packets": {
     "type": "array",
     "items": {
      "type": "object",
      "required": [
       "low",
       "integrity"
      ],
      "properties": {
       "low": {
        "type": "integer",
        "maximum": 4294967295,
        "minimum": 0
       },
       "integrity": {
        "type": "boolean"
       }
      },
      "additionalProperties": false
     },
     "maxItems": 128
    },
    "claimed_high": {
     "type": "array",
     "items": {
      "anyOf": [
       {
        "type": "boolean"
       },
       {
        "type": "number"
       },
       {
        "type": "string",
        "maxLength": 256
       }
      ]
     },
     "maxItems": 128
    },
    "seen_offsets": {
     "type": "array",
     "items": {
      "type": "integer",
      "maximum": 127,
      "minimum": 0
     },
     "maxItems": 128
    },
    "claimed_decisions": {
     "type": "array",
     "items": {
      "anyOf": [
       {
        "type": "boolean"
       },
       {
        "type": "number"
       },
       {
        "type": "string",
        "maxLength": 256
       }
      ]
     },
     "maxItems": 128
    },
    "normal_synchronization": {
     "type": "boolean"
   
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/esp-esn-replay-window-integrity-validator-eac56a0c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from detect.halowerk.com](https://www.zero.xyz/host/detect.halowerk.com/llms.txt)