Look up HUD Fair Market Rent (FMR) rates for a geographic area by ZIP code, county FIPS, CBSA/metro code, or state FIPS. Returns monthly rent estimates by bedroom count (efficiency through 4-bedroom). Note: State-level queries return all ZIP-level FMR records within the state, which can be hundre...
AI agents call get_fair_market_rent to retrieve information from loc8n Geographic Data without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
year | integer | — | FMR fiscal year (default: latest available) |
area_code | string | Yes | Area identifier — format depends on area_type |
area_type | string | Yes | Geographic area type: zip (5-digit), county (5-digit FIPS), cbsa (CBSA/metro code), or state (2-digit FIPS) |
Parameters from the server's own tool schema.
This tool queries and retrieves Fair Market Rent data from a public government database (HUD). It performs no writes, deletive actions, code execution, or financial transactions. The data returned is informational reference material (rent estimates by bedroom count for given geographic areas).
From the tool's definition Tool 'Look up' HUD Fair Market Rent (FMR) rates and 'Returns monthly rent estimates' – purely retrieves public housing data without modification, deletion, or execution of external operations.
Attacks that exploit this kind of access
Look up HUD Fair Market Rent (FMR) rates for a geographic area by ZIP code, county FIPS, CBSA/metro code, or state FIPS. Returns monthly rent estimates by bedroom count (efficiency through 4-bedroom). Note: State-level queries return all ZIP-level FMR records within the state, which can be hundreds of records. Use ZIP or county lookups when only a single area is needed. Source: U.S. Dept. of Housing & Urban Development, Fair Market Rents. It is categorised as a Read tool in the loc8n Geographic Data MCP Server, which means it retrieves data without modifying state.
get_fair_market_rent accepts 3 parameters: year, area_code, area_type. Required: area_code, area_type. The full parameter table on this page comes from the server's own tool schema.
Register the loc8n Geographic Data MCP server in PolicyLayer and add a rule for get_fair_market_rent: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches loc8n Geographic Data. Nothing to install.
get_fair_market_rent is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_fair_market_rent rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for get_fair_market_rent. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
get_fair_market_rent is provided by the loc8n Geographic Data MCP server (gener8v/gener8v.mcp.geographic-data). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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