The Offenders.io MCP Server lets AI assistants like Claude, Cursor, and other MCP-compatible clients search the sex offender registry directly. No API key required for anonymized data.

Quick Start

Point any MCP client to:

https://mcp.offenders.io/mcp

Claude Desktop — add to your config:

// ~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "offenders": {
      "command": "npx",
      "args": ["mcp-remote", "https://mcp.offenders.io/mcp"]
    }
  }
}

Cursor / Other MCP Clients — enter the URL https://mcp.offenders.io/mcp in your MCP server settings.

Free Tools (No API Key)

search_offenders_by_location

Search for sex offenders near a GPS coordinate. Returns anonymized data.

Parameters:

lat (number) — Latitude

lng (number) — Longitude

radius (number) — Radius in miles (default: 1)

Returns: Anonymized records: age, sex, race, risk level, offenses, ZIP code. Up to 5 pages.

get_offender_stats

Get a quick count of offenders near a location.

Parameters:

lat (number) — Latitude

lng (number) — Longitude

radius (number) — Radius in miles (default: 1)

Returns: Approximate total count without detailed records.

api_info

Get API capabilities, pricing, and documentation links.

Returns: Overview of all available tools and pricing.

Full Access Tools (API Key Required)

Get names, photos, addresses, and complete criminal records. Get your API key — first 50 calls free.

set_api_key

Validate and activate your Offenders.io API key.

Parameters:

key (string) — Your API key

Returns: Validates the key and confirms access to full tools.

search_offenders_full

Location search with full records: names, photos, addresses, crimes.

Parameters:

api_key (string) — Your API key

lat (number) — Latitude

lng (number) — Longitude

radius (number) — Radius in miles (1-100)

page (number) — Page number (default: 1)

Returns: Full offender records with names, photos, addresses, risk levels, offenses, and source links.

search_offenders_by_name

Search by name, DOB, city, state, or ZIP code.

Parameters:

api_key (string) — Your API key

firstName (string) — First name (optional)

lastName (string) — Last name (optional)

dob (string) — Date of birth YYYY-MM-DD (optional)

city (string) — City (optional)

state (string) — State full name (optional)

zipcode (string) — ZIP code (optional)

mode (string) — standard or extensive (optional)

fuzzy (boolean) — Fuzzy matching for misspelled names (default: true)

Returns: Full records matching the search criteria. Extensive mode enables alias matching (+$0.05/call).

Example Prompts

Once connected, try asking your AI assistant:

“Are there any registered sex offenders within 2 miles of 40.7128, -74.0060?”
“Set my API key to abc123 and search for offenders near 34.05, -118.24”
“Search for sex offenders named John Smith in California”
“Tell me about the Offenders.io API pricing and features.”

Data & Limitations

Free tools return anonymized data (no names or photos). For full records, use set_api_key to activate your key, then use search_offenders_full or search_offenders_by_name. Get your API key →

Live Example

Here's what a real MCP interaction looks like when you ask Claude about sex offenders near a location:

// You ask Claude:
"Are there sex offenders within 1 mile of 34.0522, -118.2437?"

// Claude calls the MCP tool automatically:
Tool: search_offenders_by_location
Input: { "lat": 34.0522, "lng": -118.2437, "radius": 1 }

// MCP server returns anonymized results:
{
  "total": 47,
  "offenders": [
    { "age": 42, "sex": "Male", "risk": "Moderate", "zip": "90012" },
    { "age": 55, "sex": "Male", "risk": "High", "zip": "90013" },
    // ... 45 more results
  ]
}

// Claude summarizes the results in natural language

More example prompts to try:

“How many sex offenders live within 2 miles of this school at 40.748, -73.985?”
“Give me a risk breakdown of offenders near ZIP 60601”
“What does the Offenders.io API cost and what data does it return?”

Need Full Access?

Get names, photos, and complete records with your API key — works via MCP or REST API. First 50 requests free.

Get API Key

Or follow our step-by-step build guide or add safety checks to your chatbot