TestAtlas

About

TestAtlas indexes a .NET test-automation solution into a single SQLite file and serves it to an AI agent. The map covers Gherkin features, scenarios and steps, step definitions and their bindings, page objects, API clients, project dependencies and endpoints. An agent can check whether a step already exists, search steps and scenarios, and see which scenarios a change affects.

It runs locally over stdio as the NuGet package TestAtlas.Mcp, using the .NET SDK (8.0+; dnx needs .NET 10). First build the map with the TestAtlas.Cli tool (testatlas index), then pass the codemap.db path to the server. Analysis is offline and deterministic, with no network calls and no API key.

What you can do

• Check whether a step phrase already binds to an existing definition
• Browse the reusable step vocabulary with placeholders
• Find scenarios affected by changing a class, method, step or endpoint
• Full-text search over step definitions and scenarios
• Fetch a scenario or step definition in detail
• List tags, endpoints and project dependencies
• Show entity counts and binding coverage

Tools

Local servers list their tools once they’re running, and this one doesn’t publish its list in advance. Your client shows them after you add it.

Example prompts

• Does a step for adding a product to the cart already exist?

• Which scenarios are affected if I change the CatalogApiClient?

• Search the scenarios for login and show the first match.

• List all API endpoints called by the test projects.

Set up

Every client starts TestAtlas on your machine with the same command. Pick yours; the page remembers your choice.

claude mcp add --transport stdio testatlas -- dnx TestAtlas.Mcp --yes

{
  "mcpServers": {
    "testatlas": {
      "command": "dnx",
      "args": [
        "TestAtlas.Mcp",
        "--yes"
      ]
    }
  }
}

{
  "mcpServers": {
    "testatlas": {
      "command": "dnx",
      "args": [
        "TestAtlas.Mcp",
        "--yes"
      ]
    }
  }
}

code --add-mcp '{"name":"testatlas","type":"stdio","command":"dnx","args":["TestAtlas.Mcp","--yes"]}'

{
  "servers": {
    "testatlas": {
      "type": "stdio",
      "command": "dnx",
      "args": [
        "TestAtlas.Mcp",
        "--yes"
      ]
    }
  }
}

{
  "mcpServers": {
    "testatlas": {
      "command": "dnx",
      "args": [
        "TestAtlas.Mcp",
        "--yes"
      ]
    }
  }
}

codex mcp add testatlas -- dnx TestAtlas.Mcp --yes

[mcp_servers.testatlas]
command = "dnx"
args = ["TestAtlas.Mcp", "--yes"]

gemini mcp add testatlas dnx -- TestAtlas.Mcp --yes

{
  "mcpServers": {
    "testatlas": {
      "command": "dnx",
      "args": [
        "TestAtlas.Mcp",
        "--yes"
      ]
    }
  }
}

Embed

Show TestAtlas in a README or on your site. Each embed links to this page, uses the server’s own install command, and sets no cookies. How embeds work

The card, the iframe and the JSON are in English. Add ?lang=it, fr, de or es to their address for another language.

README badge Website card iframe JSON AI prompt

README badge

Markdown

[![TestAtlas on mcp.tc](https://mcp.tc/i/testatlas/badge.svg)](https://mcp.tc/i/testatlas)

HTML

<a href="https://mcp.tc/i/testatlas"><img src="https://mcp.tc/i/testatlas/badge.svg" alt="TestAtlas on mcp.tc" height="20"></a>

It follows the reader’s light or dark mode. Add ?theme=light or ?theme=dark to fix it, or ?style=compact to show the mark without the word.

Website card

HTML

<script src="https://mcp.tc/w/testatlas.js" async></script>

The card appears where the tag is. Add data-theme="dark" or data-size="compact" to the tag to change it. The file holds everything it needs, so it makes no other requests and sets no cookies.

iframe

HTML

<iframe src="https://mcp.tc/embed/testatlas" title="TestAtlas on mcp.tc" width="420" height="200" loading="lazy" allow="clipboard-write" style="border:0;border-radius:8px;max-width:100%"></iframe>

Use it on pages that don’t allow scripts. Add ?theme=light or ?theme=dark to the address to fix the colors.

JSON

The listing as data for your own pages and tools: name, tagline, install command, tools and the “Add to” links. Any site can read it (CORS is open).

https://mcp.tc/i/testatlas.json

What each field means

AI prompt

Paste this into an AI coding assistant, such as Claude Code or Cursor, and it adds the TestAtlas card to your site.

Markdown

Add the mcp.tc card for TestAtlas, an MCP server, to my website. It is one static script: no build step, no package to install, no cookies.

Put this tag where the card should appear. The card renders right before it:

```html
<script src="https://mcp.tc/w/testatlas.js" async></script>
```

To show the card somewhere else, put this placeholder there and load the same script once, for example before `</body>`. Keep the link inside: visitors without JavaScript see it.

```html
<div data-mcptc="testatlas"><a href="https://mcp.tc/i/testatlas">TestAtlas on mcp.tc</a></div>
```

Options:
- `data-theme="light"` or `"dark"` on the tag or the placeholder fixes the colors. Without it, the card follows the visitor’s light or dark mode.
- `data-size="compact"` gives a smaller card without the tagline.
- The CSS variable `--mcptc-max-width` on the placeholder or a parent sets the width (default `520px`).
- `?lang=` on the script URL sets the card’s language: `en`, `it`, `fr`, `de` or `es`.

If the site has a Content Security Policy, allow `script-src https://mcp.tc` and `img-src data:` (the icon is inline).

For a README or other Markdown docs, use the badge instead:

```markdown
[![TestAtlas on mcp.tc](https://mcp.tc/i/testatlas/badge.svg)](https://mcp.tc/i/testatlas)
```

Reference: https://mcp.tc/embed

Change history

It runs on your computer and has no package we can follow. Edits by its owner show up here.

Nothing recorded yet. Edits by the server’s owner will show up here.

FAQ