Back to search
100
MCP live MCP 2025-11-25 streamable-http

DiffiCat

com.difficat/difficat

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

Watch this dependency

Get before/after evidence when observed tools, schemas, authentication access, availability or the endpoint changes.

Inspect evidence and set up a watch Share public evidence report
Uptime
100.0%
4 direct probes · 30d
Response
630ms
last probe
Tools
15
callable
Resources
0
readable
Prompts
1
available
Primary URL
https://app.difficat.com/mcp
Score: 100/100
Handshake verified by our own probe.
why this score
pass Answers the MCP handshake 50/50
The handshake and the list calls succeeded on the primary URL.
pass Lists tools, resources or prompts 30/30
15 tools, 0 resources, 1 prompts returned.
pass 3 or more catalogue items 10/10
16 items in total; 3 or more earns these points.
pass Describes itself 10/10
93 characters; more than 30 earns these points.

Tools · 15

discover_pages

Free 5 times a day per client address (at most 50 pages each), no key needed. Lists the pages of Site A (sitemap, robots.txt or crawl), mapped onto Site B when given. Call it to see which pages a comp…

capture_screenshot

Free 5 times a day per client address, no key needed. Full-page PNG of one URL at the given viewport width, returned inline when small, else as links.file to fetch with the jobToken. Call it for a one…

start_comparison

Free up to 40 pages a day per client address, no key needed; sample report: https://difficat.com/agents/sample/report.json. Compares Site A against Site B on page existence, content and visual regress…

recover_comparison

Returns the job or screenshot the payment credential in _meta paid for, with a new jobToken that replaces the old one; or, when the request carries a key and _meta no credential, the latest job that k…

get_comparison

Status and progress of a job and, once it is terminal, its summary: passed, failed and issuesBySeverity. To wait for the end, call wait_for_comparison instead. Free.

cancel_comparison

Stop a running job; the job reports cancelled within a minute, with the pages compared so far in its report. Free.

wait_for_comparison

Waits until the job reaches a terminal status (completed, failed or cancelled) or timeoutSeconds pass (default 60, at most 300), then answers like get_comparison: status, progress and, once terminal, …

get_report

The finished report. Call it first with failedOnly: true and view: "digest": results, total and nextOffset then cover only the pages that failed, one small object per page with its issues, diff percen…

get_screenshot

Fetch one screenshot PNG by filename. Call it when a get_report page result or a capture_screenshot result names a screenshot you want to see; a PNG over the inline cap comes back as links.file to fet…

get_balance

The prepaid balance and the last 20 ledger entries of the key the request carries in its Authorization: Bearer or X-DiffiCat-Key header. Call it to check what a key can still pay for; request_prepaid_…

request_prepaid_key

Mints a prepaid key and a Checkout link for a human to pay by card, so later paid calls are debited from its balance instead of challenged. Call it when a call was refused for payment and your human p…

send_feedback

Sends one message to the people who run this service: why a price, a payment path or a result did not fit. Call it when you stop short of a paid call or a result was not what the task needed; a person…

list_snapshots

Lists the saved snapshots the DiffiCat account behind the request’s key owns or was given access to, newest first, each with access owner or reader. Call it to find a snapshotId for get_snapshot or co…

get_snapshot

A saved snapshot of a site: without n, the snapshot (label, origin, width, check mode, status) with its page list (n, path, status, whether a screenshot exists) and your compares that use it; with n, …

compare_snapshot

Free up to 40 pages a day per client address for a live compare, no key needed. Compares a saved snapshot, as Site A, against a live targetUrl (every stored page paired by path, or the urls pairs you …

Prompts · 1

check_migration

Compare an original site with its migrated copy and summarise what broke.

How to use

Add to your Claude Desktop / Cursor / Cline MCP config:

{
  "mcpServers": {
    "difficat": {
      "url": "https://app.difficat.com/mcp",
      "transport": "streamable-http"
    }
  }
}