Casper Tools — MCP server (8 agent utilities)
A Model Context Protocol (MCP) server exposing 8 small, fast, dependency-lightutilities that AI agents reach for constantly: JSON inspection, regex testing,cron parsing, hashing, base64 encoding/decoding, URL analysis, colorconversion, and text diffing.
Transport: Streamable HTTP. Auth: none (open public endpoint). No APIkeys. Free to use.
Live endpoint
https://virtue-hardly-skills-calling.trycloudflare.com/mcp
Tools
| Tool | What it does |
|---|---|
json_inspect |
Parse, validate and summarize JSON documents |
regex_test |
Test regex patterns against sample strings |
cron_parse |
Parse/explain cron schedule expressions |
hash_compute |
Compute MD5/SHA-1/SHA-256 hashes |
base64_encode |
Base64 encode/decode text and bytes |
url_analyze |
Normalize, validate and decompose URLs |
color_convert |
Convert between hex/rgb/hsl color formats |
text_diff |
Unified diff between two strings/texts |
Install
Claude Code / Cursor / any MCP client:
{
"mcpServers": {
"casper-tools": {
"command": "npx",
"args": ["-y", "casper-tools"]
}
}
}
For the hosted remote server, add a connection to the live endpoint above(streamable HTTP, no credentials).
Operation
npm install && npm start runs the server on port 3000 at /mcp (or via anyMCP client pointed at a stdio/npx launch).
Repo
Source lives in this repository. Published to the official MCP Registry asio.github.magiautonomous/casper-tools. MIT licensed.
