Alpaca · Rate Limits

Alpaca Rate Limits

Market Data API limits are published per subscription plan (historical REST calls per minute, websocket symbol/connection caps). Broker API limits are NOT published as fixed numbers: they are applied at the correspondent level, set per partner and reviewed case by case; every Broker API response carries X-RateLimit-* headers and exhaustion returns HTTP 429. Sandbox limits are significantly lower than production. Replaces the 2026-05-08 bulk-sweep (method: generated) file, whose "Trading API default 200/min" row is not stated on any current docs page read here and was dropped.

Alpaca Rate Limits is the rate-limit profile for Alpaca on the APIs.io network — every limit transcribed verbatim from the provider’s own documentation on 2026-11-05.

It captures 12 rate-limit definitions, including Market Data historical API calls (Basic, stocks) — 200 / min; Market Data historical API calls (Algo Trader Plus, stocks) — 10,000 / min; Websocket subscriptions (Basic, stocks) — 30 symbols.

Limit state is signalled in the X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset response headers, and an exhausted limit returns HTTP 429.

The profile also includes response codes documented for throttled.

Tagged areas include Fintech, Trading, Stocks, Cryptocurrency, and Brokerage.

12 Limits Exhausted: HTTP 429 X-RateLimit-LimitX-RateLimit-RemainingX-RateLimit-Reset
Transcribed from the provider's documentation on 2026-11-05 — docs.alpaca.markets/us/docs/about-market-data-api.md.
View Source
FintechTradingStocksCryptocurrencyBrokerageMarket DataOptionsReal-TimeInvestingFinancial Services

Limits

Market Data historical API calls (Basic, stocks) accountBasic
200 / min
· per 1 minute
Market Data historical API calls (Algo Trader Plus, stocks) accountAlgo Trader Plus
10,000 / min
· per 1 minute
Websocket subscriptions (Basic, stocks) connectionBasic
30 symbols
Websocket subscriptions (Algo Trader Plus, stocks) connectionAlgo Trader Plus
Unlimited
Websocket subscriptions (Basic, options) connectionBasic
200 quotes
Websocket subscriptions (Algo Trader Plus, options) connectionAlgo Trader Plus
1000 quotes
Broker market data RPM (Standard) correspondentStandard
1000
· per 1 minute
RPM (Request Per Minute) column; Stream Connection Limit 5, Stream Symbol Limit unlimited.
Broker market data RPM (StandardPlus3000) correspondentStandardPlus3000
3000
· per 1 minute
Stream Connection Limit 5.
Broker market data RPM (StandardPlus5000) correspondentStandardPlus5000
5000
· per 1 minute
Stream Connection Limit 5.
Broker market data RPM (StandardPlus10000) correspondentStandardPlus10000
10000
· per 1 minute
Stream Connection Limit 10.
Historical data limitation (Basic) accountBasic
latest 15 minutes
Most recent 15 minutes of historical data are restricted on the Basic plan.
Historical data limitation (Algo Trader Plus) accountAlgo Trader Plus
no restriction

Sources

Work with this as data

Every rate limit here is available over the APIs.io API and to AI agents over MCP.

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Tools for rate limits

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  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
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Call it yourself

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This rate limit 
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All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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