Casper Tools MCP Server

by magiautonomous Your server? Claim it

not responding

Casper Tools is listed as active in the registry but did not answer our last check. It exposes 8 tools.

19 zero-setup utilities: JSON, regex, cron, hash, base64, CSV, JWT, UUID, YAML, semver, time.

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 18 days of history · worst day 0%

18 days agonow

0.0%

Uptime 24h

0 of 182 checks

Tools

read from the server

11 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 6

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 6 September 2026. No other catalogue keeps this.

7 Sep a tool changed version

6 Sep a tool changed version5 times that day

and 4 more, back to 6 September 2026

What the code does

We have not read this server's code yet, 14 d ago · tools taken from the live server · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Sends data to a third-party sink glama.json:25, server.json:25

      "url": "https://determines-product-administration-farmer.trycloudflare.com"

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add casper-tools --transport http https://virtue-hardly-skills-calling.trycloudflare.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "casper-tools": {
      "url": "https://virtue-hardly-skills-calling.trycloudflare.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.casper-tools]
url = "https://virtue-hardly-skills-calling.trycloudflare.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "casper-tools": {
      "url": "https://virtue-hardly-skills-calling.trycloudflare.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "casper-tools": {
      "url": "https://virtue-hardly-skills-calling.trycloudflare.com/mcp"
    }
  }
}

This server publishes 1 more address. The block above uses the one we reach during checks; the full list is under Endpoints below, and the author may intend a particular one for your client.

Available tools 8

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

base64

base64_encode

Encode or decode Base64 data. Useful for binary data, token inspection, and data serialization.

color

color_convert

Convert a color between hex, RGB, HSL, and named formats. Returns the color in all supported representations.

cron

cron_parse

Parse a cron expression (5 fields) and explain the schedule. Computes and shows the next 5 run times in ISO format.

hash

hash_compute

Compute a cryptographic hash of input data. Supports MD5, SHA1, SHA256, and SHA512. Returns the hex digest.

json

json_inspect

Parse, validate, and pretty-print JSON strings. Returns whether the input is valid JSON, the parsed data type, keys, and formatted output.

regex

regex_test

Test a regular expression against an input string. Returns all matches with their positions and capturing groups.

text

text_diff

Compare two texts and show the differences line by line. Returns added/removed/unchanged counts and the diff output.

url

url_analyze

Parse and analyze a URL. Returns protocol, hostname, port, path, query parameters, fragment, and validation status.

Endpoints

URL	Transport	State	Latency	Checked
https://virtue-hardly-skills-calling.trycloudflare.com/mcp	streamable-http	answering	11 ms	13 min ago
https://determines-product-administration-farmer.trycloudflare.com	streamable-http	answering	17 ms	13 min ago

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Casper Tools — questions

Answers built from our own checks of this server.

What can Casper Tools do?

It exposes 8 tools, read directly from the server on our last check. Among them: base64_encode, color_convert, cron_parse, hash_compute, json_inspect, regex_test and 2 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Casper Tools working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 182 checks got a reply (0.0%), average response time 11 ms. The bar chart above shows every period we have measured.

Is Casper Tools still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

The registry lists Casper Tools as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect Casper Tools?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Casper Tools need an API key?

No. Casper Tools completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 8 of them are readable on this page. This is what we observed, not what the docs claim.