# Smarter Way x402 skills

This origin hosts x402 v2 paid APIs. Pay with USDC on Base (eip155:8453).
Unauthenticated paid calls return HTTP 402 with a PAYMENT-REQUIRED header.
Retry with PAYMENT-SIGNATURE after signing the challenge.

Prefer HTTPS webhooks for signal delivery when you can host callbacks;
otherwise pay for a socket session and connect to the advertised ws_url.

## Discovery
- GET /
- GET /.well-known/x402
- GET /.well-known/x402.json
- GET /.well-known/api-catalog
- GET /llms.txt
- GET /health

## Services
- watch-trends: /services/watch-trends/v1 (catalog /services/watch-trends/v1/x402.json)
  price_usd>=0.01 USDC
  category=data/markets tags=markets,webhooks,websocket,crypto