MCP server

CaliberAPI Pistol Optic Fit Official

com.caliberapi/pistol-optics

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

Source-cited pistol red dot compatibility: direct fits, adapter plates and optic footprints.

Working at last checkVerified publisher: caliberapi.comAbout 1,093 tokens per request once connected5 tools

https://mcp.caliberapi.com/mcp

At a glance

Type: MCP server
Publisher: caliberapi.com (verified by the MCP Registry)
Status: Working at last check
Tools: 5
Token cost: About 1,093 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

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 pistol-optics https://mcp.caliberapi.com/mcp

Claude Desktop

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

Codex (config.toml)

[mcp_servers.pistol-optics]
url = "https://mcp.caliberapi.com/mcp"

Gemini CLI

{"mcpServers":{"pistol-optics":{"httpUrl":"https://mcp.caliberapi.com/mcp"}}}

Cursor

{"mcpServers":{"pistol-optics":{"url":"https://mcp.caliberapi.com/mcp"}}}

VS Code

{"servers":{"pistol-optics":{"type":"http","url":"https://mcp.caliberapi.com/mcp"}}}

Antigravity

agy mcp add pistol-optics https://mcp.caliberapi.com/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":"pistol-optics","server_url":"https://mcp.caliberapi.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"pistol-optics","server_url":"https://mcp.caliberapi.com/mcp"}

check_fit ~318 tokens
Answer whether a specific red dot optic fits a specific pistol, from source-cited data. Returns fit "direct" (mounts on the slide cut, with the footprint), "adapter" (only through the adapter plate chain in via, with plate maker, model, mount and presented footprints, and plate sources), or "unknown
get_footprint ~160 tokens
Describe one optic mounting footprint or plate system (for example RMR, RMSc, ACRO, DPP, Glock MOS): screw and recoil lug counts, the optics that use it, the pistols cut for it directly, and the adapter plates that mount or present it, with sources.
list_optics_for_pistol ~259 tokens
List every optic with a cited fit on one pistol, each marked direct (with footprint) or adapter (with the plate chain in via). Use it for questions like "what red dots fit my pistol". Optics not listed have no cited fit, which is not evidence they do not fit. Report the answer exactly as returned: n
list_pistols_for_optic ~197 tokens
List every pistol with a cited fit for one optic, each marked direct (with footprint) or adapter (with the plate chain in via). Use it for questions like "what pistols take this red dot". Report the answer exactly as returned: never call an adapter fit a direct fit, and never turn "unknown" into "do
search ~159 tokens
Find pistols, optics and footprints by name. Returns slugs, names and page URLs to pass to the other tools. Use it when you are unsure of an exact model name.

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