# NovaPath Grant Claim Trace Verifier

> NovaPath Grant Claim Trace Verifier is a paid API for AI agents from instructional-decision-engine-x402.vercel.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-31).

Validates up to eight numeric grant claims for source traceability, population/geography/period consistency, and arithmetic correctness, returning corrected values and evidence gaps.

## Facts

- Endpoint: POST https://instructional-decision-engine-x402.vercel.app/grants/claim-trace?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/novapath-grant-claim-trace-verifier-836752f9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rMWZH_x2_QTce-QOi7_v7

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 novapath-grant-claim-trace-verifier-836752f9 -d '<json body>'
```

Example prompt: Can you check these three grant claims for me? Claim 1: numerator 450, denominator 1200, claimed value 37.5 percent, unit percent, source available, version matches, population matches, geography matches, period matches, units match, inputs verified. Claim 2: numerator 80, denominator 500, claimed value 16 percent, unit percent, source available, version doesn't match, population matches, geography matches, period matches, units match, inputs not verified. Claim 3: numerator 300, denominator 1000, claimed value 300 count, unit count, source not available, version matches, population doesn't match, geography matches, period matches, units match, inputs verified — flag any arithmetic errors, consistency issues, or evidence gaps.

## When to prefer this

Choose this endpoint when you need to audit specific numeric claims in grant applications, reports, or proposals for arithmetic accuracy and source traceability — especially when you have structured numerator/denominator data and can supply boolean consistency flags. It is particularly valuable for grant compliance workflows, pre-submission audits, and identifying evidence gaps without exposing private narrative content. Prefer this over general fact-checking tools when the domain is specifically grant funding statistics with known source metadata.

## Known failure modes

- Array contains more than 8 claims — request rejected
- Missing required fields (numerator, denominator, claimedValue, unit, or boolean flags) — validation error
- Numeric values exceed maximum of 1,000,000,000 — schema rejection
- Source not available and multiple consistency mismatches — evidence gap reported without correction
- Denominator of zero causing division-by-zero in percent/per_1000 calculations — may return error or null corrected value

## How this service works

Check up to eight numeric grant claims for source traceability, population/geography/period consistency and arithmetic. Returns corrected values where supported plus specific evidence gaps; no private narratives needed.

## Output

Returns per-claim validation results including arithmetic correctness (with corrected values where the math is wrong), flags for source traceability failures, and specific evidence gaps across population, geography, period, version, and unit consistency dimensions. No private narrative data is required or returned.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "claims": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "numerator",
     "denominator",
     "claimedValue",
     "unit",
     "sourceAvailable",
     "versionMatches",
     "populationMatches",
     "geographyMatches",
     "periodMatches",
     "unitsMatch",
     "inputsVerified"
    ],
    "properties": {
     "unit": {
      "enum": [
       "count",
       "percent",
       "per_1000",
       "usd"
      ],
      "type": "string"
     },
     "numerator": {
      "type": "number",
      "maximum": 1000000000,
      "minimum": 0
     },
     "unitsMatch": {
      "type": "boolean"
     },
     "denominator": {
      "type": "number",
      "maximum": 1000000000,
      "minimum": 0
     },
     "claimedValue": {
      "type": "number",
      "maximum": 1000000000,
      "minimum": 0
     },
     "periodMatches": {
      "type": "boolean"
     },
     "inputsVerified": {
      "type": "boolean"
     },
     "versionMatches": {
      "type": "boolean"
     },
     "sourceAvailable": {
      "type": "boolean"
     },
     "geographyMatches": {
      "type": "boolean"
     },
     "populationMatches": {
      "type": "boolean"
     }
    },
    "additionalProperties": false
   },
   "maxItems": 8,
   "minItems": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/novapath-grant-claim-trace-verifier-836752f9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from instructional-decision-engine-x402.vercel.app](https://www.zero.xyz/host/instructional-decision-engine-x402.vercel.app/llms.txt)