# x402 Data Hub - Real-Time API Datasets for AI Agents

> x402 Data Hub (https://x402datahub.io) provides machine-readable, verified, real-time structured JSON datasets. It is built specifically for AI agents, RAG pipelines, and Web3 applications using the x402 HTTP Payment Protocol ($0.01 USDC per request on Arbitrum / Base).

## Overview
- **Base API URL**: `https://data-hub-api.izzor2021.workers.dev`
- **Supported Networks**: Arbitrum One, Base
- **Payment Token**: USDC ($0.01 per request)
- **Payment Header**: `x-payment-tx: <TRANSACTION_HASH>`
- **Free Tier**: 3 free requests per dataset per day for testing and low-frequency agents.

## Quick Start for AI Agents
To fetch any dataset, send an HTTP GET request to the dataset endpoint.

### Free Request (No Header Required):
```bash
curl -s https://data-hub-api.izzor2021.workers.dev/saas/ai-api-pricing
```

### Paid Request (with x402 Payment Header):
```bash
curl -s -H "x-payment-tx: 0xYOUR_TRANSACTION_HASH" https://data-hub-api.izzor2021.workers.dev/saas/ai-api-pricing
```

---

## Available Datasets

### 1. Expat & Relocation
- **Bali Rental Index**: `GET /expat/rent-bali`
  - Long-term villa and apartment rental prices in Canggu, Seminyak, counter, etc.
- **Lisbon Rental Index**: `GET /expat/rent-lisbon`
  - Monthly rental prices in Lisbon, Porto, Lagos.
- **Tbilisi Rental Index**: `GET /expat/rent-tbilisi`
  - Rental prices, safety ratings, internet speeds across Vake, Saburtalo, Vera.
- **Digital Nomad Visas**: `GET /expat/nomad-visas`
  - Income requirements, processing times, and rejection reasons.
- **Top Digital Nomad Hubs 2026**: `GET /expat/digital-nomad-hubs`
  - Comparison of top 20 cities for nomads (wifi speed, safety, monthly cost).

### 2. AI & Tech Trends
- **AI API Cost Comparison**: `GET /saas/ai-api-pricing`
  - Real-time token pricing for OpenAI (GPT-4o), Anthropic (Claude 3.5), Gemini, DeepSeek V3 per 1M tokens.
- **LLM Response Latency Index**: `GET /ai/llm-latency`
  - Live tracking of TTFT, throughput (tps), and uptime across major LLM providers.
- **Trending Open-Source LLMs**: `GET /ai/huggingface-top-models`
  - Benchmarks, VRAM requirements, and context windows for top open-weight models (DeepSeek-V3, Llama 3.3, Qwen 2.5).
- **Trending AI Agent Frameworks**: `GET /ai/github-trending-ai`
  - Weekly top open-source AI agent frameworks, star growth rates, and primary tech stacks (elizaOS, CrewAI, LangChain).
- **SaaS Free Tier Matrix**: `GET /saas/free-tier`
  - Database of developer-friendly SaaS tools with free tiers (Supabase, Vercel, Railway, Pinecone, etc.).

### 3. Finance & Crypto
- **Multi-Chain Gas Tracker**: `GET /finance/gas-tracker`
  - Real-time gas prices in Gwei and average transaction fees in USD across Ethereum, Arbitrum, Base, Polygon, Solana.
- **Crypto Fear & Greed Index**: `GET /finance/fear-greed`
  - Market sentiment metrics, volatility index, and historical trend analysis.

### 4. Tech & Remote Work
- **Remote Tech Salary Index**: `GET /jobs/remote-salaries`
  - Global compensation benchmarks for Senior Engineers, AI Engineers, and DevOps.

### 5. Legal & Business
- **E-Residency Comparison**: `GET /legal/eresident-comparison`
  - Tax rates, setup costs, and banking ease for e-Residency in Estonia, Lithuania, Dubai, and Palau.

---

## Data Quality & Provenance
Every response includes a `metadata` block containing:
- `dataset_name`: Name of the dataset.
- `last_updated`: ISO-8601 timestamp.
- `sources`: List of verified primary sources (e.g., official portals, exchange APIs, on-chain data).
- `status`: Verification status (`verified`).

## Contact & Links
- Website: https://x402datahub.io
- GitHub: https://github.com/alexchai-dev/cloudflare-data-hub