MCP Tool · x402 · early usage

Hold what a document says about one US address next to dated official records

by api.locus.report · discovered, not yet claimed by its owner · updated 2026-09-29

30d calls1

30d payers1

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

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.

Tags: bazaar · builder-code · locus.freePreflight · offer-receipt

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-09-29

Input example from Bazaar metadata

{
  "subjects": [
    {
      "address": "1 E Edenton St, Raleigh, NC 27601",
      "claims": [
        {
          "definition": "heated",
          "field": "reported_area",
          "unit": "sqft",
          "value": 2412
        },
        {
          "field": "year_built",
          "year": 1985
        }
      ],
      "id": "subject_a",
      "mode": "listing"
    }
  ]
}

Output example

{
  "charged": false,
  "kind": "listing_claim_check_diagnostic",
  "message": "Example artifact; not live data.",
  "status": "no_usable_evidence"
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/51453.json for the price and payment options.
Pay. Call GET https://api.locus.report/api/locus-listing-claim-check. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.25 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 1 calls · 1 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.25	0xF121fbeceC43e1B616D47285851c20d5fC64431b	120s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xF121fbeceC43e1B616D47285851c20d5fC64431b",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "250000",
    "amountUsd": 0.25,
    "maxTimeoutSeconds": 120
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {},
  "type": "string"
}

Examples

curl

curl -X POST 'https://api.locus.report/api/locus-listing-claim-check' -H 'Content-Type: application/json' --data '{"subjects":[{"address":"1 E Edenton St, Raleigh, NC 27601","claims":[{"definition":"heated","field":"reported_area","unit":"sqft","value":2412},{"field":"year_built","year":1985}],"id":"subject_a","mode":"listing"}]}'
# -> 402 Payment Required; read PAYMENT-REQUIRED
# retry the identical request with PAYMENT-SIGNATURE

JavaScript

const res = await fetch("https://api.locus.report/api/locus-listing-claim-check", {
  "method": "POST",
  "headers": {
    "content-type": "application/json"
  },
  "body": "{\"subjects\":[{\"address\":\"1 E Edenton St, Raleigh, NC 27601\",\"claims\":[{\"definition\":\"heated\",\"field\":\"reported_area\",\"unit\":\"sqft\",\"value\":2412},{\"field\":\"year_built\",\"year\":1985}],\"id\":\"subject_a\",\"mode\":\"listing\"}]}"
});
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
import json
res = httpx.request("POST", "https://api.locus.report/api/locus-listing-claim-check", json=json.loads("{\"subjects\":[{\"address\":\"1 E Edenton St, Raleigh, NC 27601\",\"claims\":[{\"definition\":\"heated\",\"field\":\"reported_area\",\"unit\":\"sqft\",\"value\":2412},{\"field\":\"year_built\",\"year\":1985}],\"id\":\"subject_a\",\"mode\":\"listing\"}]}"))
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: api.locus.report
Endpoint: https://api.locus.report/api/locus-listing-claim-check
Machine-readable: /resources/51453.json