# TLS 1.3 KeyUpdate Record-Layer Epoch Obligation Verifier

> TLS 1.3 KeyUpdate Record-Layer Epoch Obligation Verifier 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 and computes TLS 1.3 KeyUpdate epoch state: send/receive key generation counters, per-generation record sequence numbers, and mandatory coalesced KeyUpdate response obligations for a given transcript fixture.

## Facts

- Endpoint: POST https://detect.halowerk.com/v1/F-A-NIGHT-PROTOCOL-TLS-KEYUPDATE/tls13-record-keyupdate-epoch-obligations?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/tls-1-3-keyupdate-record-layer-epoch-obligation-verifier-e69b41dd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HNMFNyUzjk9cyMtfOZ4WX

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 tls-1-3-keyupdate-record-layer-epoch-obligation-verifier-e69b41dd -d '<json body>'
```

Example prompt: Check the TLS 1.3 KeyUpdate epoch obligations for my fixture: send_generation=2, send_sequence=5, receive_generation=1, receive_sequence=3, sent_finished=true, received_finished=false, pending_response=true, claim=42, and no extra events — tell me if the KeyUpdate response is mandatory and what the sequence witnesses are.

## When to prefer this

Use this endpoint when you need an authoritative offline computation of TLS 1.3 KeyUpdate epoch state — specifically for test fixture authoring, protocol conformance testing, or debugging TLS 1.3 record-layer key rotation logic without running a live TLS session. Prefer this over manual calculation when you need precise send/receive generation counters, per-generation sequence witnesses, and mandatory response obligation flags validated against the TLS 1.3 spec.

## Known failure modes

- Invalid claim value outside the allowed numeric range causes validation error
- Malformed events array with more than 512 entries or items exceeding limits returns schema error
- Missing required fields (e.g. send_generation, pending_response) causes 400 Bad Request
- Payment not provided or insufficient USDC causes 402 Payment Required
- Internally inconsistent state (e.g. received_finished=true but receive_generation=0) may return a logic error or unexpected result

## How this service works

An offline TLS1.3 record-layer fixture author needs exact independent send/read key-generation and per-generation record-sequence witnesses plus coalesced mandatory KeyUpdate response obligations for an anonymous endpoint transcript.

## Output

Returns computed TLS 1.3 KeyUpdate epoch state including independent send and receive key generation counters, per-generation record sequence witnesses, and a determination of coalesced mandatory KeyUpdate response obligations based on the submitted transcript fixture parameters.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "artifact": {
   "type": "object",
   "required": [
    "tls_keyupdate"
   ],
   "properties": {
    "tls_keyupdate": {
     "type": "object",
     "required": [
      "claim",
      "events",
      "pending_response",
      "receive_generation",
      "receive_sequence",
      "received_finished",
      "send_generation",
      "send_sequence",
      "sent_finished"
     ],
     "properties": {
      "claim": {
       "type": "number",
       "maximum": 1000000000000,
       "minimum": -1000000000000
      },
      "events": {
       "type": "array",
       "items": {
        "type": "array",
        "items": {
         "type": "number",
         "maximum": 1000000000000,
         "minimum": -1000000000000
        },
        "maxItems": 512
       },
       "maxItems": 512
      },
      "send_sequence": {
       "type": "number",
       "maximum": 1000000000000,
       "minimum": -1000000000000
      },
      "sent_finished": {
       "type": "boolean"
      },
      "send_generation": {
       "type": "number",
       "maximum": 1000000000000,
       "minimum": -1000000000000
      },
      "pending_response": {
       "type": "boolean"
      },
      "receive_sequence": {
       "type": "number",
       "maximum": 1000000000000,
       "minimum": -1000000000000
      },
      "received_finished": {
       "type": "boolean"
      },
      "receive_generation": {
       "type": "number",
       "maximum": 1000000000000,
       "minimum": -1000000000000
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tls-1-3-keyupdate-record-layer-epoch-obligation-verifier-e69b41dd/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)