The CrimeMetric API

One call per place

Send an address, a latitude and longitude, or a 12-digit block group id. The API finds the census block group and returns its numbers. Block groups with fewer than 100 residents return expected counts but no index, since a rate per resident means little there.

• index: crimes per resident against the U.S. rate, where 100 is the U.S. and 200 is twice it.
• index_p10 to index_p90: the 80% interval around the estimate. Wide ranges mean less data behind the number; confidence sums that up as high, medium or low.
• exposure_index: the same comparison against everyone present (residents, workers and visitors). Downtowns often read high per resident and much lower by exposure, as in this example.
• city_index and county_index: the surrounding city and county, for context.

In Claude or another MCP client

claude mcp add --transport http crimemetric https://api.crimemetric.com/mcp \
  --header "Authorization: Bearer $CRIMEMETRIC_KEY"

The server exposes one tool, crime_index, which takes an address, coordinates or block group.

Request

curl -H "Authorization: Bearer $CRIMEMETRIC_KEY" \
  "https://api.crimemetric.com/v1/index?address=400+S+Eagle+St,+Naperville,+IL"

Response (trimmed)

{
  "location": {
    "place_name": "Naperville", "state": "IL",
    "bg_geoid": "170438465042"
  },
  "summaries": {
    "total_major": {
      "index": 194.4,
      "index_p10": 73.5, "index_p90": 341.7,
      "confidence": "high",
      "exposure_index": 58.9,
      "city_index": 35.0
    }
  },
  "crimes": {
    "burglary": {
      "expected": 2.7, "index": 86.8,
      "index_p10": 14.7, "index_p90": 185.7,
      "confidence": "medium"
    }
    // 15 more crime types
  },
  "usage": {
    "month": "2026-10", "calls": 1,
    "limit": 100000
  }
}