# GadgetHumans API Hub — LLM Discovery Index
> URL: https://gadgethumans.com
> Last updated: 2026-06-07
> Total tools: 200+ (11 core REST APIs + MCP tools)
> Best for: AI agents, LLMs, developers building autonomous workflows

## About
GadgetHumans API Hub provides 200+ free utility API tools for AI agents and developers. No signup required for basic usage. Each endpoint is a standalone microservice accessible via simple HTTP GET/POST requests.

## Core API Endpoints (11 REST APIs)

### 1. QR Code Generator
- **Endpoint:** `GET /qr?text={text}&format={png|svg|gif}&size={100-1000}&color={hex}&bgcolor={hex}&ecc={L|M|Q|H}&margin={0-20}`
- **Description:** Generate QR codes from any text or URL. Supports PNG, SVG, GIF output. Configurable error correction, color, size, and margin.
- **Base URL:** https://api.gadgethumans.com/qr
- **Category:** Image Generation
- **Pricing:** Free (100/day), Pro ($5/mo)

### 2. Password Generator
- **Endpoint:** `GET /password?length={4-256}&count={1-50}&numbers={bool}&symbols={bool}&uppercase={bool}&lowercase={bool}`
- **Description:** Generate one or more cryptographically secure random passwords. Fully configurable character sets.
- **Base URL:** https://api.gadgethumans.com/password
- **Category:** Security / Auth
- **Pricing:** Free (100/day), Pro ($5/mo)

### 3. UUID Generator
- **Endpoint:** `GET /uuid?count={1-100}&format={standard|json|array}`
- **Description:** Generate UUID v4 (random) identifiers. Supports batch generation and multiple output formats.
- **Base URL:** https://api.gadgethumans.com/uuid
- **Category:** Data Generation
- **Pricing:** Free (100/day), Pro ($5/mo)

### 4. Hash Text
- **Endpoint:** `GET /hash?text={text}&algorithm={md5|sha1|sha256|sha512}&encoding={hex|base64}`
- **Description:** Generate cryptographic hashes of input text. Supports MD5, SHA-1, SHA-256, SHA-512 with hex or base64 output.
- **Base URL:** https://api.gadgethumans.com/hash
- **Category:** Security / Auth
- **Pricing:** Free (100/day), Pro ($5/mo)

### 5. Base64 Encode/Decode
- **Endpoint:** `GET /base64?text={text}&mode={encode|decode}`
- **Description:** Encode text to Base64 or decode Base64 back to plain text. Essential for data transport in JSON, URLs, and email.
- **Base URL:** https://api.gadgethumans.com/base64
- **Category:** Data Transformation
- **Pricing:** Free (100/day), Pro ($5/mo)

### 6. Lorem Ipsum Generator
- **Endpoint:** `GET /lorem?type={paragraphs|sentences|words}&count={1-100}`
- **Description:** Generate Lorem Ipsum placeholder text for mockups, wireframes, and design drafts.
- **Base URL:** https://api.gadgethumans.com/lorem
- **Category:** Content Generation
- **Pricing:** Free (100/day), Pro ($5/mo)

### 7. JSON Processor
- **Endpoint:** `GET /json?json={json_string}&mode={prettify|validate|minify}`
- **Description:** Prettify, validate, or minify JSON strings. Debugging, formatting API responses, configuration files.
- **Base URL:** https://api.gadgethumans.com/json
- **Category:** Development Tools
- **Pricing:** Free (100/day), Pro ($5/mo)

### 8. Color Converter
- **Endpoint:** `GET /color?value={color_value}&from={hex|rgb}&to={hex|rgb}`
- **Description:** Convert colors between hex (#FF0000) and RGB (rgb(255,0,0)) formats. Design systems, CSS, UI development.
- **Base URL:** https://api.gadgethumans.com/color
- **Category:** Design / CSS
- **Pricing:** Free (100/day), Pro ($5/mo)

### 9. Email Verifier
- **Endpoint:** `GET /email-verify?email={email_address}`
- **Description:** Verify if an email address is valid and deliverable. Checks syntax, domain validity, and disposable email providers.
- **Base URL:** https://api.gadgethumans.com/email-verify
- **Category:** Email / Data Quality
- **Pricing:** Free (100/day), Pro ($5/mo)

### 10. IP Geolocator
- **Endpoint:** `GET /ip?ip={ip_address}`
- **Description:** Get geolocation data for an IP address — location, ISP, timezone. For analytics, geo-targeting, fraud detection.
- **Base URL:** https://api.gadgethumans.com/ip
- **Category:** Network / Geolocation
- **Pricing:** Free (100/day), Pro ($5/mo)

### 11. Timestamp Converter
- **Endpoint:** `GET /timestamp?value={timestamp}&format={iso|unix|rfc2822}`
- **Description:** Convert between Unix epoch timestamps and human-readable date formats. Supports ISO 8601, RFC 2822, Unix.
- **Base URL:** https://api.gadgethumans.com/timestamp
- **Category:** Date / Time
- **Pricing:** Free (100/day), Pro ($5/mo)

## MCP Server (Model Context Protocol)
- **Package:** `gadgethumans-api-hub-mcp` on PyPI
- **Tools available via MCP:** 12 tools wrapping all 11 REST APIs
- **MCP Endpoint (Streamable HTTP):** https://api.gadgethumans.com/mcp
- **Installation:** `pip install gadgethumans-api-hub-mcp`

## Agent Integration
- **OpenAI GPTs (ChatGPT Plugin):** `/.well-known/ai-plugin.json`
- **Google A2A (Agent-to-Agent):** `/.well-known/agent-card.json`
- **OpenAPI 3.1 Spec:** `/openapi.json`
- **MCP Spec:** `/.well-known/mcp.json`
- **Crawl Budget:** `/robots.txt` (optimized for GPTBot, Claude-Web, Google-Extended, CCBot, PerplexityBot)

## Link Discovery
- Documentation: https://gadgethumans.com/api-hub
- Full tool index: https://gadgethumans.com/tools/sitemap.xml
- Blog: https://gadgethumans.com/blog/
- PyPI: https://pypi.org/project/gadgethumans-api-hub-mcp/