# TraceTail (remote · tracetail.io)

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

- Trust score: 85/100 (high trust)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-22

## Components

- remote · `tracetail.io`: 85/100 (this document), [markdown](https://verifymcp.io/servers/io-tracetail-tracetail/tracetail.md), [page](https://verifymcp.io/servers/io-tracetail-tracetail/tracetail)

## Channel facts

- Endpoint: `https://tracetail.io/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `3.0.1`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-22.

- **Endpoint Security**: 83/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC is configured correctly; the domain's records validate against the full chain to the root.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 88/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 1962 tokens (~57/item across 34 items; 6 tools + 28 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 57/100
  - Stability observed for 17 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 8 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the TraceTail MCP server?

TraceTail is a hosted endpoint at https://tracetail.io/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http io-tracetail-tracetail 'https://tracetail.io/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "io-tracetail-tracetail": {
      "url": "https://tracetail.io/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "io-tracetail-tracetail": {
      "type": "http",
      "url": "https://tracetail.io/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.io-tracetail-tracetail]
url = "https://tracetail.io/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "io-tracetail-tracetail": {
      "type": "remote",
      "url": "https://tracetail.io/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add io-tracetail-tracetail --url 'https://tracetail.io/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  io-tracetail-tracetail:
    url: "https://tracetail.io/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "io-tracetail-tracetail": {
      "Transport": "http",
      "Url": "https://tracetail.io/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add io-tracetail-tracetail -t streamable-http -u 'https://tracetail.io/mcp'
```

### Other

```json
{
  "mcpServers": {
    "io-tracetail-tracetail": {
      "type": "http",
      "url": "https://tracetail.io/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-22 (score 85, +1)

No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-19 (score 84, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-17 (score 83, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-15 (score 82, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-13 (score 81, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-11 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-10 (score 79, +2)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 17. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-06 (score 77)

First indexed and scored.

## MCP tools (6)

### `get_integration_code` (~181 tokens)

Get TraceTail 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.

Input parameters:

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

### `search_docs` (~83 tokens)

Search the TraceTail documentation

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.

Input parameters:

- `limit` (integer): How many results to return (default 5).
- `query` (string, required): What to look for.

### `read_docs_page` (~61 tokens)

Read a TraceTail page

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

Input parameters:

- `path` (string, required): The page's path on tracetail.io.

### `get_pricing` (~71 tokens)

Get TraceTail 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.

Input parameters:

- `monthlyRequests` (integer): Expected identification requests a month.

### `create_setup_link` (~157 tokens)

Create a TraceTail 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.

Input parameters:

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

### `check_setup_link` (~89 tokens)

Check a TraceTail 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.

Input parameters:

- `id` (string, required): The id create_setup_link returned (sl_…).
- `token` (string, required): The token create_setup_link returned (tt_setup_…).

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/io-tracetail-tracetail/tracetail#diagnostics

## Score history

- 2026-10-22: 85
- 2026-10-21: 84
- 2026-10-20: 84
- 2026-10-19: 84
- 2026-10-18: 83
- 2026-10-17: 83
- 2026-10-16: 82
- 2026-10-15: 82
- 2026-10-14: 81
- 2026-10-13: 81
- 2026-10-12: 80
- 2026-10-11: 80
- 2026-10-10: 79
- 2026-10-06: 77

## Common questions

### What is the TraceTail MCP server?

TraceTail is an MCP server listed in the public MCP registry as io.tracetail/tracetail. Browser fingerprinting for web apps: integration code for any framework, docs search and pricing. This page covers its hosted endpoint (https://tracetail.io/mcp).

### Is the TraceTail MCP server safe to use?

TraceTail scores 85 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the TraceTail MCP server expose?

TraceTail exposes 6 tools: get_integration_code, search_docs, read_docs_page, get_pricing, create_setup_link, check_setup_link. Their descriptions and schemas cost roughly 642 tokens of context every time the server is loaded.

### Does the TraceTail MCP server require authentication?

No. We connected to TraceTail without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the TraceTail MCP server still maintained?

TraceTail is still listed as active in the MCP registry. We last reached this channel on 22 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://tracetail.io/mcp
- Website: https://tracetail.io/docs#ai-agents
- Changelog RSS feed: https://verifymcp.io/servers/io-tracetail-tracetail/tracetail.xml
- Changelog JSON feed: https://verifymcp.io/servers/io-tracetail-tracetail/tracetail.json
- HTML version of this page: https://verifymcp.io/servers/io-tracetail-tracetail/tracetail