Apply the ROT13 Caesar cipher to text. Self-inverse — running the output through rot13 again recovers the original. Non-letters pass through unchanged.
This page documents the HTTP endpoint POST /api/tools/rot13/execute. See the MCP reference →
Call it over REST
POST https://api.findutils.com/api/tools/rot13/execute · no API keys · 60 requests/min per IP
Execute — verified arguments
curl -X POST https://api.findutils.com/api/tools/rot13/execute \
-H "Content-Type: application/json" \
-d '{
"text": "Hello"
}'Parameter schema for this endpoint
curl https://api.findutils.com/api/tools/rot13Input schema
| Argument | Type | Required | Description |
|---|---|---|---|
| text | string | yes | Text to rotate. |
Example arguments (verified)
{
"text": "Hello"
}Also an MCP tool
Claude, Cursor, and any MCP client can call this tool as
findutils:rot13 after one connect command.
Connect once
claude mcp add findutils --transport http https://mcp.findutils.com/More Encoding tools
Base32 Decode
Decode RFC 4648 base32 back to UTF-8 text.
Base64 Decode
Decode a base64 string back to UTF-8 text.
Base64 Encode
Encode UTF-8 text as a base64 string.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text.
Color Convert
Convert between color formats: hex, rgb, hsl, hsv.
Hash Generate
Hash text with MD5, SHA-1, SHA-256, or SHA-512.
Hex Decode
Decode a hexadecimal string back to UTF-8 text.
Hex Encode
Encode UTF-8 text as a hexadecimal string.