Use CyberMax Data MCP with Gemini CLI

Free US data lookups: ZIP demographics, CISA KEV/EPSS CVEs, domain rank, county spending, recalls.

Remote MCP server (Streamable HTTP), nothing to install. Free: Free, no key needed

Set it up

Run the command, or add the server to settings.json under "mcpServers".
Start Gemini CLI and run /mcp to list the server and its tools.
Ask a question the tools can answer.

Run:

gemini mcp add --transport http cybermax-data 'https://data.cybermaxtools.com/mcp?via=use-with-gemini-cli'

Or add it to settings.json yourself::

{
  "mcpServers": {
    "cybermax-data": {
      "httpUrl": "https://data.cybermaxtools.com/mcp?via=use-with-gemini-cli"
    }
  }
}

Where it goes:

~/.gemini/settings.json (user)
.gemini/settings.json (project, the default for the add command)

Config format checked 2026-10-09 against Gemini CLI's MCP documentation.

Tools you get

Endpoint checked 2026-10-09: https://data.cybermaxtools.com/mcp answered an MCP initialize (protocol 2025-06-18) and tools/list with 7 tools, all marked read-only. No key was used and no tool was called.

Tool	What it does	Required inputs
`zip_lookup`	Look up a US ZIP code: city, state, county, coordinates, time zone and Census ACS 2020-2024 demographics (population, median age, household and per-capita income, median home value, median gross rent, housing units, owner-occupied share).	`zip_code`
`cve_kev_lookup`	Check whether a CVE is in CISA's Known Exploited Vulnerabilities (KEV) catalog; if so return vendor, product, date added, federal due date, known ransomware use, EPSS probability/percentile, CVSS score/severity/vector, CWE and required action.	`cve_id`
`latest_kev`	List the CVEs most recently added to CISA's Known Exploited Vulnerabilities catalog, newest first, with EPSS, CVSS and due date in the summary.	none
`domain_rank`	Link-graph rank of a popular website (top 5,000): Common Crawl harmonic-centrality and PageRank rank, hosts crawled, previous-crawl rank, Majestic Million rank and referring subnets. For any other domain use Linkheft on Apify (apify.com/cybermax/domain-authority).	`domain`
`county_federal_spending`	FY2025 federal prime contract and grant obligations in a US county (USAspending.gov, place of performance): dollars, per-resident values, population and the county's contract rank in its state.	`county_fips`
`vehicle_recall`	Look up an NHTSA vehicle/equipment recall campaign from the last 12 months: manufacturer, component, units affected, do-not-drive and park-outside flags, summary, risk, remedy and affected make/model/year list.	`campaign`
`latest_recalls`	List the newest US vehicle and equipment recalls from NHTSA, newest first, with risk and remedy.	none

Test the endpoint from a terminal

This lists the tools without a key and without calling any of them:

curl -s https://data.cybermaxtools.com/mcp \
  -H 'content-type: application/json' \
  -H 'accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

If it does not work

Use "httpUrl" for Streamable HTTP; "url" is for the older SSE transport.
The docs note that for unpaid-tier and Google One users, Gemini CLI was replaced by Antigravity CLI on 18 June 2026.
The free tier has a daily limit (see the pricing line above); a paid key raises it.

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