How to use Broker API Comparator
Compare Alpaca, IBKR, Tradier, Schwab, and Robinhood on auth, rate limits, order types, market data, MCP support, and fees so you don't wire integration code against the wrong broker.
What It Does
Use the calculator with intent
Compare Alpaca, IBKR, Tradier, Schwab, and Robinhood on auth, rate limits, order types, market data, MCP support, and fees so you don't wire integration code against the wrong broker.
Engineers building automated trading systems who learned the hard way that broker integration cost varies 10x and the OAuth-only broker isn't optional in production.
Interpreting Results
Auth model is the bottleneck — OAuth-only brokers (Schwab) require an explicit user-consent flow. Rate limits gate strategy frequency. MCP support matters if you're wiring an LLM agent rather than a deterministic strategy.
Input Steps
Field by field
- 1
Filter
Filter brokers by required asset coverage (US equity, options, futures, crypto).
- 2
Read outputs
Read the rate-limit table and the latency benchmarks (sandbox p50/p95/p99).
- 3
Read outputs
Read commission cost (where applicable) plus PFOF analysis (where 'free').
- 4
Read outputs
Read the auth method and security posture. Some brokers require OAuth; others use API key.
- 5
Test
Test in paper-trading mode before committing real capital. Sandbox latency is best-case; production tail latency varies with deployment region and broker traffic.
Common Scenarios
Use realistic starting points
LLM-agent execution
Required
MCP support
Frequency
minute-bar
Alpaca + Tradier remain; Alpaca's MCP server is more mature, Tradier's rate limits are tighter — match to agent loop frequency.
Multi-asset prop
Required
options + futures + intl
Frequency
daily
IBKR is the only retail broker that covers the full universe; Schwab covers options/futures but no intl access via API.
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FAQ
Questions people ask next
The short answers readers usually want after the first pass.
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