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Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

DiffiCat

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com.difficat/difficat

difficat.comVerified

Compare a website before and after a migration: missing pages, content changes, visual diffs.

OtherIs DiffiCat down?Alternatives

13 of 22 checks passed

  • Handshake
  • Tools listed
  • Updated recently

Responded

The server completed its last measured handshake. This is an observation, not a guarantee.

Connect to server
Median latency
196 ms
Uptime, 30 days
Not measured
Last checked

Measurement details

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 196 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name difficat.

  • Pass
    Lists tools

    tools/list returned 6 tools.

  • Pass
    Current protocol

    Negotiated 2025-11-25. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 196 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 196 ms over 1 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    1 of 1 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Not measured
    Stable tool list

    Fewer than two successful probes in 30 days, so tool-list stability is not measured.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Pass
    Parameters documented

    39 of 39 parameters have a description (100%). The bar is 80%.

  • Pass
    Safety hints

    Every tool sets readOnlyHint or destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Pass
    Website matches publisher

    The website host matches the reverse-domain namespace.

  • Fail
    Source repo linked

    No repository URL is on file.

  • Not measured
    Repo owner matches

    This namespace is not an io.github login, so the owner comparison does not apply.

  • Pass
    Recently updated

    Updated 2026-09-25T15:23:36.196762Z, within 180 days.

  • Not measured
    Open-source licence

    No GitHub repository to ask about a licence.

Tools

  • capture_screenshot

    Takes a full-page screenshot of one URL, for example to see how a relaunched page or a mobile layout looks. Free 5 times, once per client address, no key needed. The PNG is taken at the given viewport width and returned inline when small, else as links.file to fetch with the jobToken. Call it for a one-off look at a page or a mobile-width check. Do not call it for pages a comparison job covers: the job already stored their screenshots. Example: { "url": "https://new.example/pricing", "viewportWidth": 375 }. Answers with jobId, jobToken, filename, url, dimensions, bytes, links.file and, on a free run, sample and allowanceRemaining.

    Measured

  • check_page

    Use when you deployed or edited a page and need to catch visual regressions and content changes: it compares the live URL with a baseline captured on the first call, a snapshot or a production URL, and answers the regressions. Free up to 40 pages, once per client address, no key needed.

    Measured

  • diff_deploy

    Use when a staging or preview deploy should match production, or a migrated site its old one: it compares the pages of both origins and answers only the pages that are missing, changed or look different. Free up to 40 pages, once per client address, no key needed.

    Measured

  • get_balance

    The prepaid balance and last 20 ledger entries of the key in the request’s Authorization: Bearer or X-DiffiCat-Key header; a human obtains one on the account page (/account), which a refusal’s nextSteps name. A Pro key also returns allowance (included pages shared with the web app, used, reset time) and overage (amount this period, cap). Each entry names its surface, web or api. Without a key, answers the remaining free allowance for your address. Free.

    Measured

  • get_report

    The finished report. Call it first with failedOnly: true and view: "digest": only the failed pages, each with its issues, diff percentage and largest regions, and a text line per page; summary covers every page. check_page and diff_deploy return the first regressed region's image; get_screenshot (?surface=full) fetches a region by filename. Without view, results are { path, status, failedChecks }; responseFormat: "detailed" returns per-check fields. offset and limit page through results (default 50, at most 5000; nextOffset is next); limit: 1 returns the summary alone; includeText: true adds the plain-text report. A change whose flakyShare is at least 0.5 is likely the page moving on its own: mask its fingerprint's element (visual.masks), not a regression. Call wait_for_comparison first. Free.

    Measured

  • wait_for_comparison

    Waits until the job is completed, failed or cancelled, or timeoutSeconds pass, then answers status, progress and, once terminal, the summary (passed, failed, issuesBySeverity). On "running", call it again. Free.

    Measured

Probe history

  • ok196 ms6 tools

Status and uptime

Add badge to your README

The image links back to this page. It shows checks passed, or uptime, and the colour follows the latest status. Responses are cached for 5 to 15 minutes.

MCP Heartbeat badge

Markdown

[![MCP Heartbeat](https://mcpheartbeat.com/badge/com.difficat/difficat.svg)](https://mcpheartbeat.com/s/com.difficat/difficat)

HTML

<a href="https://mcpheartbeat.com/s/com.difficat/difficat"><img alt="MCP Heartbeat" src="https://mcpheartbeat.com/badge/com.difficat/difficat.svg"></a>

Uptime markdown

[![MCP Heartbeat uptime](https://mcpheartbeat.com/badge/com.difficat/difficat.svg?kind=uptime)](https://mcpheartbeat.com/s/com.difficat/difficat)

Served from https://mcpheartbeat.com.

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Connect to this server

Claude Code

claude mcp add --transport http difficat https://app.difficat.com/mcp

Cursor .cursor/mcp.json

{
  "mcpServers": {
    "difficat": {
      "url": "https://app.difficat.com/mcp"
    }
  }
}

VS Code .vscode/mcp.json

{
  "servers": {
    "difficat": {
      "type": "http",
      "url": "https://app.difficat.com/mcp"
    }
  }
}