MCP server

CheckFitment Official

com.checkfitment/checkfitment

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Bolt patterns and wheel specs by vehicle, wheel and tire fitment, spacer and gear ratio maths.

Website

At a glance

Type

MCP server

Publisher

checkfitment.com (verified by the MCP Registry)

Status

Working at last check

Tools

6

Token cost

About 1,865 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http checkfitment https://checkfitment.com/mcp?src=mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.checkfitment]
url = "https://checkfitment.com/mcp?src=mcp"

Gemini CLI

{"mcpServers":{"checkfitment":{"httpUrl":"https://checkfitment.com/mcp?src=mcp"}}}

Cursor

{"mcpServers":{"checkfitment":{"url":"https://checkfitment.com/mcp?src=mcp"}}}

VS Code

{"servers":{"checkfitment":{"type":"http","url":"https://checkfitment.com/mcp?src=mcp"}}}

Antigravity

agy mcp add checkfitment https://checkfitment.com/mcp?src=mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"checkfitment","server_url":"https://checkfitment.com/mcp?src=mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"checkfitment","server_url":"https://checkfitment.com/mcp?src=mcp"}

Tools

• bolt_pattern_facts ~164 tokens
  Use for "what is 5x114.3 in inches", "is 5x114.3 the same as 5x115", "will 6x135 wheels fit 6x139.7", or which vehicles use a pattern. Converts mm and inch notation, lists look-alike patterns that do not interchange, the vehicles in the dataset with that pattern, the lug tightening order and typical
• bolt_pattern_lookup ~299 tokens
  Use for "what is the bolt pattern on a 2019 Ford F-150", lug torque, center bore, thread size, OEM wheel size, offset or tire size of a vehicle, or "will these wheels fit my car" when the vehicle is named. Looks the vehicle up in the CheckFitment dataset (a fixed set of vehicles, each spec cited to
• gear_ratio_calculator ~356 tokens
  Use for "what does my 3.73 axle behave like on 35s", "what ratio do I need to regear for 33s", RPM at highway speed after a tire change, or the crawl ratio (with transfer-case low ratio and first gear). Returns the effective ratio, RPM before and after in a 1:1 gear, the ratio that restores stock fe
• tire_size_compare ~263 tokens
  Use for "what changes if I go from 265/70R17 to 285/75R17", "how far off is my speedometer with 33s", or odometer error after a tire change. Returns diameter, width, sidewall and ride-height change, the true speed when the speedometer shows a given value, the odometer error and how serious it is.
• wheel_fitment_check ~456 tokens
  Use to compare a current wheel (and tire) with a new one: how far the outer edge pokes toward the fender and the inner edge toward the suspension, the diameter and ride-height change, speedometer effect, backspacing, and whether the new tire width suits the new rim width. With measured clearances (o
• wheel_spacer_calculator ~327 tokens
  Use for "do I need spacers", "what spacer gets +35 wheels to +20", "is a 10 mm slip-on spacer safe". A spacer lowers the effective offset by its thickness. Returns the spacer needed for a target offset (and the nearest common size), the effective offset, track change, whether it is slip-on or bolt-o

Browse

• Web scraping

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