Schwab Market Data API Worker

A Cloudflare Worker that interfaces with the Schwab API for market data access.

Features

• OAuth2 Authentication: Automated flow to retrieve and store Access/Refresh tokens.
• Auto-Refresh: Cron trigger refreshes tokens every 20 minutes to prevent expiration.
• Market Data: Endpoints for Stock Quotes, Price History, Market Movers, and Market Hours.
• UI Dashboard: Built-in landing page to view token status and test endpoints.
• KV Storage: Securely stores tokens using Cloudflare KV.

API Endpoints

Endpoint	Description
GET /	Dashboard with status and documentation
GET /authorize	Initiates Schwab OAuth login
GET /callback	OAuth callback handler
GET /quote?symbols=AAPL,MSFT	Get real-time quotes for one or more symbols
GET /pricehistory?symbol=AAPL	Get historical candle data
GET /movers/$DJI	Get top movers for an index
GET /markets?markets=equity	Get market hours
GET /clear-tokens	Force clear stored tokens

Setup

1. Prerequisites

   • Cloudflare account with Workers enabled.
   • Schwab Developer account (App Key & Secret).

2. Configuration

   • Create a KV Namespace:

     wrangler kv namespace create schwab_tokens

   • Update the id in wrangler.toml under kv_namespaces with the new ID.

3. Secrets

   • Set your Schwab API credentials:

     wrangler secret put SCHWAB_APP_KEY
     wrangler secret put SCHWAB_APP_SECRET

4. Deploy

   wrangler deploy

Notes

• Schwab refresh tokens expire after 7 days, requiring re-authorization.
• The cron job keeps access tokens fresh but cannot extend the refresh token lifetime.