TraceTail

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Browser fingerprinting for web apps: integration code for any framework, docs search and pricing.

Developer Tools

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Call this server's tools from your browser. Nothing to install.

https://tracetail.io/mcp

Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.

Tool list from our last check. Connect live to refresh it.

check_setup_link

Where a setup link stands. The first check after the person finishes returns the API keys (and the server key, if requested); they are not shown again. While they're still on the page, check again every few seconds.

idstring, required

The id create_setup_link returned (sl_…).

tokenstring, required

The token create_setup_link returned (tt_setup_…).

This tool isn't marked read-only, so it may change something on the server or in an account you connected.

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Tools (6)

check_setup_link

Argument	Type	Description
id*	string	The id create_setup_link returned (sl_…).
token*	string	The token create_setup_link returned (tt_setup_…).

Input schema (JSON)

{
  "type": "object",
  "required": [
    "id",
    "token"
  ],
  "properties": {
    "id": {
      "type": "string",
      "description": "The id create_setup_link returned (sl_…)."
    },
    "token": {
      "type": "string",
      "description": "The token create_setup_link returned (tt_setup_…)."
    }
  },
  "additionalProperties": false
}

create_setup_link

Gets TraceTail API keys for the person you work for: returns a link to give them, where they sign in with an emailed code and add a card or continue without a card, and a token. Then call check_setup_link with its id and token every few seconds: once they've finished, it returns an API key for each site (and a server key if you asked), once.

Argument	Type	Description
email	string	The person's email, if you know it: it prefills the page.
domains*	array	The sites to create API keys for, like ["example.com", "localhost"]; include localhost for local development.
serverKey	boolean	Also create a server key, so the backend can verify identifications.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "domains"
  ],
  "properties": {
    "email": {
      "type": "string",
      "description": "The person's email, if you know it: it prefills the page."
    },
    "domains": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 5,
      "minItems": 1,
      "description": "The sites to create API keys for, like [\"example.com\", \"localhost\"]; include localhost for local development."
    },
    "serverKey": {
      "type": "boolean",
      "description": "Also create a server key, so the backend can verify identifications."
    }
  },
  "additionalProperties": false
}

get_integration_code

The exact install command and code to add TraceTail browser fingerprinting (a stable visitor ID for each browser, without cookies) to a web app built with the given framework, with where each file goes. Works without an API key (keyless mode, no sign-up); pass the site's public API key to fill it in.

read-only

Argument	Type	Description
apiKey	string	The site's public TraceTail API key (tt_…), if it has one. Leave out to use the placeholder.
framework*	string	The app's framework: html (a plain script tag), javascript (any bundler), react, nextjs, vue, nuxt, angular or svelte.
firstPartyPath	string	The path of the site's first-party proxy, e.g. /k3v9, to load TraceTail from the site's own domain.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "framework"
  ],
  "properties": {
    "apiKey": {
      "type": "string",
      "description": "The site's public TraceTail API key (tt_…), if it has one. Leave out to use the placeholder."
    },
    "framework": {
      "enum": [
        "html",
        "javascript",
        "react",
        "nextjs",
        "vue",
        "nuxt",
        "angular",
        "svelte"
      ],
      "type": "string",
      "description": "The app's framework: html (a plain script tag), javascript (any bundler), react, nextjs, vue, nuxt, angular or svelte."
    },
    "firstPartyPath": {
      "type": "string",
      "pattern": "^\\/[a-z0-9](?:[a-z0-9-]{0,30}[a-z0-9])$",
      "description": "The path of the site's first-party proxy, e.g. /k3v9, to load TraceTail from the site's own domain."
    }
  },
  "additionalProperties": false
}

get_pricing

TraceTail's prices and limits (1,000 identification requests free every month, then $0.10 per 1,000), with the monthly cost at a given volume and the same volume on Fingerprint (FingerprintJS) for comparison.

read-only

Argument	Type	Description
monthlyRequests	integer	Expected identification requests a month.

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "monthlyRequests": {
      "type": "integer",
      "maximum": 10000000000,
      "minimum": 0,
      "description": "Expected identification requests a month."
    }
  },
  "additionalProperties": false
}

read_docs_page

Returns a page of the TraceTail site as Markdown: "/docs" (the full documentation), "/pricing", "/vs-fingerprintjs", "/" (overview) or a blog post.

read-only

Argument	Type	Description
path*	string	The page's path on tracetail.io.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "path"
  ],
  "properties": {
    "path": {
      "enum": [
        "/",
        "/pricing",
        "/docs",
        "/live-demo",
        "/vs-fingerprintjs",
        "/fingerprintjs-alternatives",
        "/blog",
        "/contact",
        "/status",
        "/privacy-policy",
        "/terms-and-conditions",
        "/blog/how-browser-fingerprinting-works",
        "/blog/tracetail-vs-fingerprintjs",
        "/blog/detecting-bots-without-cookies",
        "/blog/browser-fingerprint-signals-explained",
        "/blog/fingerprinting-without-cookies",
        "/blog/gdpr-compliant-fingerprinting",
        "/blog/browser-fingerprinting-research-2024-2025",
        "/blog/banking-fraud-prevention",
        "/blog/future-browser-fingerprinting",
        "/blog/ecommerce-fraud-prevention",
        "/blog/defeating-sophisticated-fraud",
        "/blog/gaming-platform-security",
        "/blog/privacy-first-fingerprinting",
        "/blog/travel-hospitality-fraud-prevention",
        "/blog/resilient-authentication"
      ],
      "type": "string",
      "description": "The page's path on tracetail.io."
    }
  },
  "additionalProperties": false
}

search_docs

Searches TraceTail's documentation, pricing, comparison and blog for a topic (e.g. "next.js", "rate limits", "ad blockers", "GDPR", "server-side verification") and returns the matching sections with their URLs.

read-only

Argument	Type	Description
limit	integer	How many results to return (default 5).
query*	string	What to look for.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "maximum": 10,
      "minimum": 1,
      "description": "How many results to return (default 5)."
    },
    "query": {
      "type": "string",
      "maxLength": 200,
      "minLength": 2,
      "description": "What to look for."
    }
  },
  "additionalProperties": false
}