@pipeworx/fema-nfhl

Connect: https://gateway.pipeworx.io/fema-nfhl/mcp · Install: one-click buttons

No MCP client? Skip the connection: POST https://gateway.pipeworx.io/v1/tools/search_packs {"query":"..."} to find a tool below, GET /v1/tools/<name> for its schema, POST the same URL with arguments for the data — see For AI agents.

Tools: 3

FEMA’s National Flood Hazard Layer — the authoritative digital flood map. Effective FIRM flood hazard zones, base flood elevations, floodways, levees, cross-sections, LOMRs and LOMAs, the FIRM panel index and political jurisdictions, served as a public ArcGIS REST MapServer.

Tools

• nfhl_flood_zone_at_point(latitude, longitude, include_bfe?) — the effective FIRM flood zone at a coordinate: zone code and subtype, Special Flood Hazard Area flag, static BFE, governing DFIRM id, plus nearby BFE lines.
• nfhl_query(layer_id, where?, bbox?, out_fields?, limit?, offset?, order_by?, return_geometry?) — any NFHL layer by WHERE clause and optional envelope.
• nfhl_layers(filter?) — every layer with a plain-English guide to the ones that matter.

Auth

Keyless.

Data sources

• https://hazards.fema.gov/arcgis/rest/services/public/NFHL/MapServer — the MapServer.
• Layer 28 S_FLD_HAZ_AR (flood hazard zones), 27 S_FLD_HAZ_LN (boundary lines), 16 S_BFE, 1 S_LOMR, 34 S_LOMA, 3 S_FIRM_PAN, 23 S_LEVEE, 0 NFHL Availability.

Different API from the openfema pack. openfema serves the OpenFEMA tabular datasets — disaster declarations, individual and public assistance, NFIP claims and policies. This pack serves the geospatial flood map, which OpenFEMA cannot answer. Pair them: NFHL for the zone, openfema for the claims and declaration history of the county it sits in.

Traps

• STATIC_BFE is -9999 where no base flood elevation applies — a sentinel, not an elevation. This pack returns null for it.
• SFHA_TF ('T'/'F' as strings) is what answers “is this a Special Flood Hazard Area”. FLD_ZONE alone does not: Zone X has two subtypes and one of them is the 0.2% annual chance (500-year) floodplain.
• NFHL coverage is not national. A community that has never been digitally mapped returns zero features, which means “not mapped”, not “no flood risk”. nfhl_flood_zone_at_point says so explicitly rather than returning an empty array that reads as a clean all-clear. Layer 0 (NFHL Availability) tells you which is which.
• Identifier fields are strings: DFIRM_ID='48201C', not 48201C.

Tools

• nfhl_flood_zone_at_point — Returns the effective FEMA FIRM flood zone at a coordinate — zone code, subtype, Special Flood Hazard Area flag and base elevation.
• nfhl_query — 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
• nfhl_layers — List every layer in the FEMA National Flood Hazard Layer MapServer with its id, name and geometry type, plus a plain-English guide to the layers that matter (flood hazard zones, base flood elevations,