`nfhl_query`

Pack: fema-nfhl · Endpoint: https://gateway.pipeworx.io/fema-nfhl/mcp

No MCP client? Call it directly: GET https://gateway.pipeworx.io/v1/tools/nfhl_query for the schema, then POST the same URL with its arguments for the data.

Query any layer of the FEMA National Flood Hazard Layer with an ArcGIS WHERE clause and optional bounding box — flood hazard zones, base flood elevations, floodways, LOMRs and LOMAs, FIRM panels with their effective dates, levees, cross-sections, political jurisdictions. Use for area questions (“every floodway polygon in this county”, “LOMRs issued on this DFIRM”). Layer ids come from nfhl_layers.

Parameters

Name	Type	Required	Description
`layer_id`	number,string	yes	NFHL layer id — 28 is Flood Hazard Zones, 16 Base Flood Elevations, 1 LOMRs, 3 FIRM Panels
`where`	string	no	ArcGIS WHERE clause, default “1=1”. Id fields are strings: DFIRM_ID=‘48201C’.
`bbox`	string	no	Optional “xmin,ymin,xmax,ymax” WGS84 envelope to restrict the query (longitude first)
`out_fields`	string	no	Comma-separated field names, or "" for all (default "")
`limit`	number	no	Max rows, 1-${MAX_RECORDS} (default 50)
`offset`	number	no	Row offset for paging
`order_by`	string	no	Comma-separated order-by fields
`return_geometry`	boolean	no	Include geometry. Default false — flood polygons are very large.

Example call

Arguments

{
  "layer_id": 28,
  "where": "DFIRM_ID='48201C' AND FLD_ZONE='AE'",
  "out_fields": "FLD_ZONE,ZONE_SUBTY,SFHA_TF,STATIC_BFE,DFIRM_ID",
  "limit": 5
}

curl

curl -X POST https://gateway.pipeworx.io/fema-nfhl/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"nfhl_query","arguments":{"layer_id":28,"where":"DFIRM_ID='\''48201C'\'' AND FLD_ZONE='\''AE'\''","out_fields":"FLD_ZONE,ZONE_SUBTY,SFHA_TF,STATIC_BFE,DFIRM_ID","limit":5}}}'

TypeScript (@pipeworx/sdk)

import { Pipeworx } from '@pipeworx/sdk';
const pipeworx = new Pipeworx();

const result = await pipeworx.call('nfhl_query', {
  "layer_id": 28,
  "where": "DFIRM_ID='48201C' AND FLD_ZONE='AE'",
  "out_fields": "FLD_ZONE,ZONE_SUBTY,SFHA_TF,STATIC_BFE,DFIRM_ID",
  "limit": 5
});

Connect

Add this to your MCP client config, or use one-click install buttons:

{
  "mcpServers": {
    "fema-nfhl": {
      "url": "https://gateway.pipeworx.io/fema-nfhl/mcp"
    }
  }
}

See Getting Started for client-specific install steps.

nfhl_query