Uri MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 603 installs a week from npm. Last commit 28 Oct 2026.
URL and encoding work offline: parse a URL, percent-encode or decode text, and convert base64 both
Today is the operative word: we check Uri MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add uri-mcp -- npx -y @mrfentmen/uri-mcp
{
"mcpServers": {
"uri-mcp": {
"command": "npx",
"args": [
"-y",
"@mrfentmen/uri-mcp"
]
}
}
}
[mcp_servers.uri-mcp]
command = "npx"
args = ["-y", "@mrfentmen/uri-mcp"]
{
"mcpServers": {
"uri-mcp": {
"command": "npx",
"args": [
"-y",
"@mrfentmen/uri-mcp"
]
}
}
}
{
"servers": {
"uri-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@mrfentmen/uri-mcp"
]
}
}
}
base64, hashing, regex, word count, JWT decode and CSS unit conversion. Deterministic, offline.
MCP server for Base64, URL, and HTML encoding/decoding
Classic hex dumps and byte stats offline: dump text, hex or base64 and convert between them
Encode and decode base58 and base58check offline, with version bytes and checksums
Slugify, convert case, and encode text locally. No network and no key.
Parse, validate and convert XML offline with a real parser: entities, CDATA, attributes
Encode/decode Base64, URL-safe variants, and file data
Work with JSONC offline: strip comments and trailing commas, parse to JSON and locate errors
Answers built from our own checks of this server.