mcpbeat Sign in

fcc-spectrum-mcp-server MCP Server

answering

fcc-spectrum-mcp-server is answering right now. Last checked 14 min ago. 565 installs a week from npm. It exposes 5 tools. Last commit 26 Oct 2026.

Search FCC radio licenses, find nearby licensed sites, and see who is licensed on a frequency.

Installs per day peak 229 · avg 37 · +707% w/w
a month agotoday
Uptime history 31 days of history · worst day 98%
31 days agonow
98.9%
Uptime 24h
90 of 91 checks
5
Tools
read from the server
547 ms
Response time
average over 24h
565
Installs / week
npm and PyPI

What changed 11

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 13 October 2026. No other catalogue keeps this.

26 Oct a tool changed version
25 Oct a tool description was rewritten fcc_spectrum_get_license
25 Oct a tool changed version
13 Oct 5 tools changed the parameters they ask for fcc_spectrum_find_transmitters, fcc_spectrum_get_license, fcc_spectrum_list_reference and 2 more
13 Oct 2 tool descriptions were rewritten fcc_spectrum_find_transmitters, fcc_spectrum_list_reference
13 Oct a tool changed version

What the code does

We read the source, 6 d ago · tools taken from the live server · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Runs an external command src/services/uls/ingest-schedule.ts:175
  const child = spawn(command, [...args, JSON.stringify(spec)], {

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.

run in your terminal
claude mcp add fcc-spectrum-mcp-server --transport http https://fcc-spectrum.caseyjhand.com/mcp
Settings → Connectors → Add custom connector, then paste this address
https://fcc-spectrum.caseyjhand.com/mcp
~/.codex/config.toml
[mcp_servers.fcc-spectrum-mcp-server]
url = "https://fcc-spectrum.caseyjhand.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "fcc-spectrum-mcp-server": {
      "url": "https://fcc-spectrum.caseyjhand.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "fcc-spectrum-mcp-server": {
      "type": "http",
      "url": "https://fcc-spectrum.caseyjhand.com/mcp"
    }
  }
}

Available tools 5

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

fcc
fcc_spectrum_find_transmitters
Find FCC-licensed sites within a radius of a coordinate, nearest first, each with its callsign, licensee, distance, coordinates, filed location type and class, ground elevation, structure height, and authorized frequencies. Filter by frequency or band, radio service, location type, location class, and live status (active by default). Unset location_class keeps all filed roles, including receive and passive locations; filed classes describe authorization, not actual on-air activity. Coordinates are decimal degrees or DMS strings. Mobile and temporary-fixed operating areas are returned at their center with radiusKm and match when the center lies within radius_km. Locations without valid coordinates are omitted; market-area licenses without site records are found with fcc_spectrum_search_frequencies.
fcc_spectrum_get_license
Fetch one FCC ULS license or spectrum lease in full by callsign or unique system identifier (USI): licensee (the lessee on a lease), status and key dates, its locations with coordinates, elevation, structure height, and ASR number, each location's antennas, each antenna's authorized frequencies with power, ERP/EIRP, station class, transmitter, and emission designators, and the microwave paths it transmits on (receive location and antenna, receive coordinates, receiving callsign); geographic-area licenses list their market and spectrum blocks, and lease links are shown in both directions. Large records are paged: one call lists whole locations up to 50 sites, 100 antennas, and 100 paths, up to max_frequencies frequency rows, and 100 leases, and names the location_offset or lease_offset that reads the rest; location_number starts the locations at a location number the search tools return. Technical detail is kept for active, pending-legal, and term-pending records only. A callsign shared by several records returns the active one, else the most recent.
fcc_spectrum_list_reference
Decode FCC ULS codes used by the other tools — radio service codes, station classes, license statuses, location types, antenna types, applicant types, amateur operator classes — or report coverage: which service groups this index holds, record counts, and when each was last updated. Works before the index is built. Station classes describe licensed categories, not actual on-air activity.
fcc_spectrum_search_frequencies
Find FCC ULS authorizations whose occupied band overlaps a frequency or band. Site assignments (land mobile, microwave, paging, cellular sites) return one row per site and frequency with the site's state and coordinates; market-area licenses and leases (PCS, AWS, 700 MHz, 3.45 and 3.7 GHz, and other auctioned blocks) return one row per spectrum block with its market code and name; 3.5 GHz Priority Access Licenses file no frequency, so list them with fcc_spectrum_search_licenses and radio_service PL. Filter by state, radio service, licensee, FRN, market code, and live status (active by default). For transmitter sites near a coordinate, use fcc_spectrum_find_transmitters.
fcc_spectrum_search_licenses
Search FCC ULS licenses and spectrum leases by callsign, licensee name, FCC Registration Number (FRN), market code, radio service, status, and licensee state, returning one row per record with its unique system identifier (USI) for fcc_spectrum_get_license. At least one of callsign, licensee, frn, market_code, radio_service, or state is required; status only narrows. Defaults to active records; pass status "any" to include expired, cancelled, and terminated ones. Licensee name matching is word-based (every word must appear as a word prefix), not fuzzy.

Endpoints

URLTransportStateLatencyChecked
https://fcc-spectrum.caseyjhand.com/mcp streamable-http answering 526 ms 14 min ago

Alternatives to fcc-spectrum-mcp-server

same job, measured the same way
M
mcpnav directory
by mcpnav

Search a directory of MCP servers and get connect configs. Data is CC0/MIT-licensed.

4 tools answering
Iota MCP
by qso-graph

Islands on the Air MCP server. Group lookup, island search, DXCC mapping, nearby groups.

2 392 installs/wk local only
ArcGIS MCP Bridge
by muend

Secure local-first MCP server for licensed ArcGIS Pro and ArcPy on Windows.

199 installs/wk local only
FCC License Search
by krimskrams

Search FCC radio licenses by company, call sign, or FRN; monitor status changes and snapshots.

7 tools answering
Curtis MCP
by jordannewell

Expose any folder of notes as an MCP server — list, read, search, and (opt-in) write files.

65 installs/wk local only
KYMA Frequency MCP
by bcxtrust

Search KYMA369's public frequency library and open sets in the free KYMA app.

12 tools answering
Bing Search (Free)
by iridite

Free Bing search MCP server - No API key required

84 installs/wk local only
MCP Server Geodata Placefinder
by fouomene

MCP GeoData Placefinder: search places, reverse geocode, and find nearby locations.

50 installs/wk local only

fcc-spectrum-mcp-server — questions

Answers built from our own checks of this server.

What can fcc-spectrum-mcp-server do?
It exposes 5 tools, read directly from the server on our last check. Among them: fcc_spectrum_find_transmitters, fcc_spectrum_get_license, fcc_spectrum_list_reference, fcc_spectrum_search_frequencies, fcc_spectrum_search_licenses. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is fcc-spectrum-mcp-server working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 90 of 91 checks got a reply (98.9%), average response time 547 ms. The bar chart above shows every period we have measured.
How do I connect fcc-spectrum-mcp-server?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does fcc-spectrum-mcp-server need an API key?
No. fcc-spectrum-mcp-server completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is fcc-spectrum-mcp-server?
It answers our handshake in 547 ms on average, which is faster than 21% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.
How many people use fcc-spectrum-mcp-server?
The npm package @cyanheads/fcc-spectrum-mcp-server was installed 565 times in the last week. Week over week that is +707%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is fcc-spectrum-mcp-server open source?
The code is open source: it is published under the Apache-2.0 licence, written in TypeScript, 1 stars on GitHub and 1 open issue. The licence covers the code in the repository, not the hosted service at fcc-spectrum.caseyjhand.com, which runs on its operator's own terms.