# Locus Listing Claim Check

> Locus Listing Claim Check is a paid API for AI agents from api.locus.report, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-12).

Verifies claims in a US property listing document against official parcel records, permit history, and assessment data, flagging unsupported statements and citing official sources.

## Facts

- Endpoint: POST https://api.locus.report/api/locus-listing-claim-check?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/locus-listing-claim-check-acf2f99e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wm2JFjXFiCuv_8JNeg9rY

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 locus-listing-claim-check-acf2f99e -d '<json body>'
```

Example prompt: Can you fact-check this listing for 412 Maple Grove Ln, Raleigh NC — specifically whether the advertised square footage, year built, and any listed additions or permits match the official parcel and permit records?

## When to prefer this

Use this endpoint when you need citation-backed verification of specific claims in a US property document (listing, assessment notice, or inspection excerpt) against official government records. Prefer this over generic property lookup APIs when you need to audit advertised figures, renovation claims, or assessment appeal deadlines rather than simply retrieve raw property data. Particularly valuable pre-offer, pre-appeal, or post-inspection when claim accuracy has financial or legal consequences.

## Known failure modes

- Address not found in official records — returns no supporting data for that jurisdiction
- Jurisdiction not covered — parcel or permit data unavailable for the given county or municipality
- Malformed subject object — returns validation error if required address fields are missing
- No verifiable claims submitted — endpoint returns empty result with no charge
- Permit records incomplete or not digitized — some older permits may not appear in official feeds

## How this service works

Hold what a document says about one US address next to dated official records. Modes: listing (advertised area, year built, additions, permits vs parcel and permit records), assessment_notice (figures and the notice's own printed date vs the roll and the cited statutory appeal rule), inspection_excerpt (observations mapped to the records that publish that work, plus questions for a pro). Charge-free without cited evidence. npx @velinussage/locus-agent-skill add.

## Output

A structured response citing official parcel, permit, and assessment records alongside each claim from the submitted document. Each claim is either supported by a dated official source or flagged as unsubstantiated. Modes include listing (advertised area, year built, additions, permits vs records), assessment_notice (figures and appeal deadline vs roll and statute), and inspection_excerpt (observations mapped to permit records with suggested professional follow-up questions). Unsupported claims return no charge.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "subjects": {
   "type": "array",
   "items": {
    "type": "object"
   },
   "maxItems": 1,
   "minItems": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/locus-listing-claim-check-acf2f99e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.locus.report](https://www.zero.xyz/host/api.locus.report/llms.txt)