337+ tools · API · Node & Python SDK · MCP Server

The tool layer for developers
and AI agents

Your agents are only as good as the tools they can call. Utilix gives them 337+ battle-tested utilities via API, SDK, and MCP server.

API & SDK docsBrowse tools
Browser tools337+ tools, no loginREST API10k req/day on ProNode SDK759 functions, offlinePython SDK610 functions, offlineMCP Server300 tools in Claude & Cursor

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networkNew
HTTP Authorization Header Encoder / DecoderBuild a Basic or Bearer Authorization header value, or decode an existing one back into its scheme plus username/password or token
cssNew
CSS Custom Property (Variable) Usage AuditorCross-check a CSS stylesheet's --name custom-property declarations against their var(--name) usages, flagging unused declarations, undeclared usages, and duplicate declarations within the same selector
codeNew
Markdown Blockquote Nesting ValidatorWalk a Markdown document's blockquote lines and flag nesting that jumps by more than one level at once, or a quote block that starts above level 1
networkNew
DNS CAA Record Builder / ValidatorBuild a Certification Authority Authorization (CAA) DNS record from a tag and domain, or parse an existing zone-file record into its flags, tag, authorized domain, and parameters
codeNew
Protobuf .proto Field Number Gap/Reservation CheckerParse a .proto file's message definitions and flag reused field numbers, gaps in the field-number sequence that aren't covered by a reserved or extensions statement, and field numbers outside the valid range, protobuf's own recommended practice for safe wire-format evolution.

AI tools

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imageSVG Generator (AI)Generate SVG illustrations, icons, and graphics from a text description using GPT-4o
regexNL → Regex (AI)Describe what you want to match in plain English: get a regex pattern, explanation, and test cases powered by GPT-4o mini
codeCLI Builder (AI)Describe a terminal task in plain English: get the exact shell command with a breakdown of every flag, powered by GPT-4o mini
cssCSS Explainer (AI)Paste any CSS and get a plain-English breakdown of every selector and property: powered by GPT-4o mini
jsonJSON Schema Generator (AI)Describe your data in plain English: get a production-ready JSON Schema (Draft-07) instantly, powered by GPT-4o mini
Always free in browser
337+ tools, client-side only, no login
MCP-ready for AI agents
300 tools in Claude Desktop & Cursor
REST API
Every tool at api.utilix.tech/v1
Node & Python SDK
759 functions, offline, no API key

Works everywhere

Call from any language. Same key, same format.

POST JSON in, get JSON back. Pick a use case and a language to see how.

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// ~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"utilix": {
"command": "npx",
"args": ["-y", "@utilix-tech/mcp"],
"env": {
"UTILIX_API_KEY": "YOUR_KEY"
}
}
}
}

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