# Signal Ledger Research API – Coverage Check

> Signal Ledger Research API – Coverage Check is a paid API for AI agents from 43-135-4-66.sslip.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Checks a submitted financial report (10-K, 10-Q, annual/quarterly filing) for risk signals and returns evidence-linked risk scores, severity assessments, and follow-up recommendations.

## Facts

- Endpoint: POST https://43-135-4-66.sslip.io/v1/filings/coverage-check
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signal-ledger-research-api-coverage-check-2b5e0934
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-L-4_qIovcfibNGoMvfIp

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 signal-ledger-research-api-coverage-check-2b5e0934 -d '<json body>'
```

Example prompt: Can you run a Signal Ledger coverage check on this Apple 10-K filing text I'm pasting — it's the FY2025 annual report pulled from SEC EDGAR at https://www.sec.gov/Archives/edgar/data/320193/example.htm — and tell me the risk score, severity, and any recommended follow-ups?

## When to prefer this

Choose this endpoint when you need evidence-linked, traceable risk assessment of a specific financial filing text (10-K, 10-Q, annual/quarterly report) with provenance metadata support. It is purpose-built for AI agent workflows that require structured risk signals with citations rather than generic summarization. Prefer it over general LLM summarization when you need a consistent risk score schema, freshness checks, and audit-ready evidence traces.

## Known failure modes

- Report text shorter than 200 characters returns a validation error
- Invalid or missing reportText field causes a 400 error
- sourceUrl not matching https?:// pattern fails schema validation
- Report text exceeding 100,000 characters is rejected
- Stale or unrecognized report period may lower confidence to 'low'
- Network timeout if report text is very large

## How this service works

Financial statement coverage check / 财报可分析性检查. Verify whether supplied filing text contains the statements, period, metric basis and original source needed for reliable analysis before buying a full audit. Deterministic; no AI.

## Output

Returns a JSON object with a coverage score (0-100), readiness flag, risk level, severity, confidence rating, data freshness status (age in days), evidence quotes and trace, list of missing information, schema version, document hash, and recommended follow-up actions. If no risks are detected, the risks array is empty.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "company": {
   "type": "string",
   "maxLength": 120,
   "description": "Optional company name"
  },
  "reportText": {
   "type": "string",
   "maxLength": 100000,
   "minLength": 200,
   "description": "Plain-text 10-K, 10-Q, annual report, quarterly report or financial statement supplied by the caller"
  },
  "sourceContext": {
   "type": "object",
   "properties": {
    "sourceUrl": {
     "type": "string",
     "pattern": "^https?://",
     "maxLength": 2048,
     "description": "Original regulator or issuer filing URL"
    },
    "sourceName": {
     "type": "string",
     "maxLength": 160
    },
    "metricBasis": {
     "type": "string",
     "maxLength": 160
    },
    "publishedAt": {
     "type": "string",
     "maxLength": 40,
     "description": "ISO 8601 publication timestamp"
    },
    "retrievedAt": {
     "type": "string",
     "maxLength": 40,
     "description": "ISO 8601 retrieval timestamp"
    },
    "reportPeriod": {
     "type": "string",
     "maxLength": 160
    },
    "crossCheckedSources": {
     "type": "array",
     "items": {
      "type": "string",
      "maxLength": 2048
     },
     "maxItems": 5
    }
   },
   "description": "Optional provenance metadata for report-period, freshness, metric-basis and source traceability checks",
   "additionalProperties": false
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "risks": [],
  "product": {
   "id": "coverage",
   "price": "$0.005",
   "uses_ai": false
  },
  "coverage": {
   "score": 78,
   "ready_for_analysis": true
  },
  "severity": "not_assessed",
  "confidence": "medium",
  "risk_level": "not_assessed",
  "risk_score": null,
  "source_url": "https://www.sec.gov/Archives/edgar/data/000000/example.htm",
  "report_period": "FY2025",
  "risk_category": "not_assessed",
  "data_freshness": {
   "status": "fresh",
   "age_days": 2
  },
  "evidence_quote": null,
  "evidence_trace": [],
  "schema_version": "2026-09-10",
  "document_sha256": null,
  "source_location": null,
  "missing_information": [],
  "evidence_verification": "not_applicable",
  "recommended_follow_up": [
   "Review the cash-flow statement and working-capital footnotes."
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signal-ledger-research-api-coverage-check-2b5e0934/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 43-135-4-66.sslip.io](https://www.zero.xyz/host/43-135-4-66.sslip.io/llms.txt)