# HCV Fair Market Rents (FMR) Lookup — Script Master Labs x402 Data API

> HCV Fair Market Rents (FMR) Lookup — Script Master Labs x402 Data API is a paid API for AI agents from mcp-x402.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Returns HUD Housing Choice Voucher Fair Market Rent data for U.S. locations by ZIP, county, or state, filtered by year and bedroom count, paid per-call in USDC via x402.

## Facts

- Endpoint: GET https://mcp-x402.onrender.com/x402/hcv-fmr
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/hcv-fair-market-rents-fmr-lookup-script-master-labs-x402-data-api-d824696e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KGnUpTZacVHOkiC9Xsjrz

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 hcv-fair-market-rents-fmr-lookup-script-master-labs-x402-data-api-d824696e
```

Example prompt: What's the HUD fair market rent for a 2-bedroom apartment in ZIP code 78701 for 2024?

## When to prefer this

Use this endpoint when you need authoritative, HUD-published Fair Market Rent figures for Housing Choice Voucher (Section 8) programs in the U.S. It is ideal for housing compliance, voucher payment calculations, affordable housing research, and rent benchmarking against federal standards. Prefer this over scraped or estimated rent data when you need the official government FMR figure for a specific geography and year.

## Known failure modes

- Invalid or non-existent ZIP code returns empty or error response
- Unsupported year (outside HUD published FMR years) may return no data
- Missing required 'type' or 'method' fields cause request rejection
- Bedroom count outside 0–4 range fails schema validation
- County/state combination not found in HUD dataset returns empty result
- Payment failure in x402 flow blocks the request before reaching the API

## How this service works

Pay-per-call crypto, RWA, federal, SEC, Section 8/HUD housing, and compliance APIs via x402. Primary: USDC on Base (eip155:8453). Also accepts Global Dollar (USDG) on Robinhood Chain (eip155:4663) via sovereign X-PAYMENT-TX. Hyphen routes only (e.g. /x402/gas-tracker, /x402/pha-lookup, /x402/sec-8k). MARKETPLACE REVIEW: use free /x402/playground/* (no key, no payment). Production /x402/* returns 402 unless paid via x402 or X-Api-Market-Key / X-API-Key from seller dashboard.

## Output

Returns HUD-published Fair Market Rent figures for the specified U.S. location (ZIP, county, or state), year, and bedroom count (0–4). The response includes the FMR dollar amount(s) representing the 40th-percentile gross rent estimate used for Housing Choice Voucher program payments.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "zip": {
       "type": "string"
      },
      "year": {
       "type": "integer"
      },
      "state": {
       "type": "string"
      },
      "county": {
       "type": "string"
      },
      "bedrooms": {
       "type": "integer",
       "maximum": 4,
       "minimum": 0
      }
     }
    }
   }
  },
  "output": {
   "properties": {
    "example": {}
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hcv-fair-market-rents-fmr-lookup-script-master-labs-x402-data-api-d824696e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-x402.onrender.com](https://www.zero.xyz/host/mcp-x402.onrender.com/llms.txt)