---
title: "HUD Fair Market Rents by county (national, token-gated)"
method: POST
path: "/api/locus_fair_market_rents"
tags: ["housing", "rents", "read-only", "free", "free"]
---

# HUD Fair Market Rents by county (national, token-gated)

`POST /api/locus_fair_market_rents`

## Request

- Base URL: `https://api.locus.report`
- URL: `https://api.locus.report/api/locus_fair_market_rents`
- Auth: none required

HUD Fair Market Rents for a US county by fiscal year, efficiency through 4-bedroom, from the HUD API, for voucher or program rent context. Accepts an address or state FIPS plus 3-digit county FIPS. Unconfigured when the operator HUD token is missing; program rents only, never market rent or affordability advice.
Use this when you can call Locus free tools (REST tools/call or MCP).
Use locus-fair-market-rents instead when your client can only call paid x402 routes; it returns the same records. Direct flat-body route for this one free resource; no API key, payment, or catalog wrapper. Return only the cited bounded evidence described here; this route never produces a paid brief or full report.

## Request body

- object
  - `address` string: Optional US street address or place; NC uses AddressNC first, other areas use the national geocoder fallback when latitude/longitude are not provided.
  - `latitude` number: Optional decimal latitude; provide with longitude to skip address geocoding.
  - `longitude` number: Optional decimal longitude; provide with latitude to skip address geocoding.
  - `place` string: Optional US place or address; use a street address or unambiguous place with state when FIPS are not provided.
  - `stateFips` string: Optional state FIPS code, e.g. 37 for NC; omit to resolve from address/place/point.
  - `countyFips3` string: Optional 3-digit county FIPS within state, e.g. 183 for Wake; omit to resolve from address/place/point.
  - `year` integer: Optional HUD fiscal year, 2015-2030; omit for source default/latest.

## Response `200`

Free cited evidence response.

- object

## Other responses

- `400`: Invalid request body.
- `429`: Rate limited.

---

[API](https://skmtc.dev/locus/apis/locus-api.md) · [All operations](https://skmtc.dev/locus/apis/locus-api/llms.txt) · [OpenAPI document](https://skmtc.dev/locus/apis/locus-api/revisions/ba7786b74adb?raw)