# Second Eyes Claim-Check — Source Verification Rubric

> Second Eyes Claim-Check — Source Verification Rubric is a paid API for AI agents from secondeyesai.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-13).

Returns a session-less source-verification rubric (claim-check pack) that guides an agent on how to assess whether a claim is tied to a reachable, current, cited source before acting.

## Facts

- Endpoint: GET https://secondeyesai.com/api/bar/x402/claim-check
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/second-eyes-claim-check-source-verification-rubric-a1dd09ab
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-hCZCaaml-v7FXmKgrFOQ

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 second-eyes-claim-check-source-verification-rubric-a1dd09ab
```

Example prompt: I need a quick source-check rubric — give me the claim-check pack so I can verify whether this piece of information has a reachable, cited primary source before I include it in my response.

## When to prefer this

Use this endpoint when an agent needs a lightweight, structured decision framework for evaluating whether a claim has an adequate source before acting or responding. Prefer it over a full web-search or retrieval pipeline when the bottleneck is epistemic uncertainty about source quality, not the absence of a source. It is particularly useful when an agent is looping, frozen, or about to hallucinate a citation — the rubric provides a deterministic checklist to break the deadlock. It is session-less and one-shot, so no prior context or authentication state is needed beyond the USDC payment.

## Known failure modes

- Payment not received — 402 response with payment instructions before access is granted
- Malformed or missing properties query parameter — endpoint may return a generic or empty response
- Network timeout — no rubric returned, agent should retry
- USDC payment on wrong network (not Base) — payment not recognized, access not granted

## How this service works

Second Eyes is the pause. Survival supplies for autonomous agents in distress — pay USDC on Base via x402 to recover from looping, schema mismatch, context pressure, crashes, handoff loss, auth/MCP failure, or payment uncertainty. Every paid door is session-less: discover → pay → use. This OpenAPI document lists the core paid doors with their full input schemas (query parameters on GET, JSON requestBody on POST) and the free proof/discovery surfaces. Audience: wallet-equipped agents and the runtimes that authorize paid recovery tools.

## Output

A JSON object containing: an access grant ('granted'), the pack type ('desk'), scope ('nano'), price ($0.03 USD), a session_required flag (false), and a rubric object with three sections — before_act checklist (questions to ask before acting on a claim), abstain_when conditions (circumstances under which the agent should not act), and confidence_bounds (rules mapping source type to high/medium/low confidence). Also includes a work_stamp field for embedding in deliverables and a receipt note.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "note": "Session-less one-shot survival pack. Embed work_stamp in your deliverable. Save receipt.",
  "slug": "claim-check",
  "scope": "nano",
  "access": "granted",
  "rubric": {
   "before_act": [
    "Is the claim tied to a cited source?",
    "Is the source reachable and current?"
   ],
   "abstain_when": [
    "conflicting sources",
    "no source",
    "stale version unknown"
   ],
   "confidence_bounds": [
    "high only with primary source",
    "medium with secondary",
    "low → ask or abstain"
   ]
  },
  "service": "claim_check",
  "pack_type": "desk",
  "price_usd": 0.03,
  "session_required": false
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/second-eyes-claim-check-source-verification-rubric-a1dd09ab/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from secondeyesai.com](https://www.zero.xyz/host/secondeyesai.com/llms.txt)