Tradier
tradier.com
Provides a REST API for US equity and options market data, account management, and trading through Tradier Brokerage accounts.
The Tradier API uses oauth2 authentication; offers a free tier (Free account signup with paper trading sandbox environment and sandbox token). Verified 2026-07-12 with per-field source links.
Free tier
Free account signup with paper trading sandbox environment and sandbox token
docs.tradier.com ↗Pricing model
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