@ezark/devtools-mcp
MCP server providing 25+ developer tools — JSON formatting, encoding, hashing, UUID, JWT decode, and more. All processing runs locally.
Quick Start
With Claude Code
claude mcp add devtools-mcp -- npx devtoolbox-mcp
With Claude Desktop
{
"mcpServers": {
"devtools-mcp": {
"command": "npx",
"args": ["@ezark/devtools-mcp"]
}
}
}
Available Tools (25)
JSON Tools
| Tool | Description |
|---|---|
json_format | Format/beautify JSON |
json_minify | Minify JSON |
json_validate | Validate JSON syntax |
json_to_yaml | Convert JSON to YAML |
json_to_typescript | Generate TypeScript interfaces from JSON |
Encoding Tools
| Tool | Description |
|---|---|
base64_encode | Encode text to Base64 |
base64_decode | Decode Base64 to text |
url_encode | URL-encode a string |
url_decode | URL-decode a string |
html_encode | Encode HTML special characters |
html_decode | Decode HTML entities |
number_base_convert | Convert between binary, octal, decimal, hex |
Security Tools
| Tool | Description |
|---|---|
hash_generate | Generate MD5, SHA-1, SHA-256, SHA-512 hashes |
uuid_generate | Generate UUID v4 |
password_generate | Generate secure random passwords |
jwt_decode | Decode JWT tokens |
chmod_calculate | Calculate Unix permissions |
Data Tools
| Tool | Description |
|---|---|
timestamp_convert | Convert Unix timestamps ↔ ISO dates |
csv_to_json | Convert CSV to JSON |
json_to_csv | Convert JSON to CSV |
cron_explain | Explain CRON expressions |
Text Tools
| Tool | Description |
|---|---|
string_case_convert | Convert between camelCase, snake_case, kebab-case, etc. |
regex_test | Test regex patterns |
text_diff | Compare two texts |
slug_generate | Generate URL slugs |
As Claude Code Plugin
# Clone and use as plugin
git clone https://github.com/Rih0z/devtools-mcp
claude plugin add ./devtools-mcp
The plugin includes a skill file that makes all tools available as background knowledge.
Features
- MCP spec compliant: Proper
isError: trueerror handling - RFC 4180 CSV parser: Handles quoted fields, escaped quotes, CRLF
- ReDoS protection: Pattern and input size limits
- YAML type safety: Quotes ambiguous string values
- 46 tests passing: Comprehensive edge case coverage
- Zero dependencies beyond MCP SDK and zod
Web Version
All these tools (plus 50 more) are available as a free web app at usedevtools.com.
API
DevToolBox also provides a JSON API for programmatic tool discovery:
GET https://usedevtools.com/api/tools
GET https://usedevtools.com/api/tools?category=data
GET https://usedevtools.com/api/tools?q=json
License
MIT — EZARK Consulting Inc.