RATE LIMITS FOR REAL-TIME/DELAYED REST API

The real-time/delayed REST API has rate limit of 100 requests per second across all the API endpoints. Each API endpoint has a limit on how many symbols can be queried per request. Please see below chart for more details.

Equities

API Endpoint	Max Symbols per Request
Last Sale	100
Last Trade	100
Last Quote	100
Snapshot	100
Trends	N/A. No Symbol input needed.
Bars	50

Options

API Endpoint	Max Symbols per Request
Chain	1
Prices	1
Nasdaq Options Greeks and Implied Volatility	1

Indexes

API Endpoint	Max Symbols per Request
Values	100
Snapshot	100

Reference

API Endpoint	Max Symbols per Request
All Symbols	N/A. No Symbol input needed.
Symbol Details	1
All Indexes	N/A. No Symbol input needed.
Index Details	1
Index Participants	1
All ETPs	N/A. No Symbol input needed.
ETP Details	1
Option Contracts	1