Does Interactive Brokers charge for API access?

No. IBKR's Web API documentation says its trading API is available to all IBKR clients free of cost. You pay commissions and any market-data subscriptions, which for API use require an IBKR Pro account and at least USD 500 of equity plus the subscription cost (read 2026-10-11).

How much do IBKR market-data subscriptions cost for API use?

It depends on the markets. Examples from IBKR's pricing page: the US Securities Snapshot and Futures Value Bundle is USD 10/month, waived at USD 30 of monthly commissions, and OPRA Top of Book (L1) is USD 1.50/month, waived at USD 20. Forex and crypto need no subscription.

Why is market data free in TWS but not through the API?

Exchanges license on-platform and off-platform data separately. IBKR's docs note that free TWS data bundles do not provide data via the API or third-party platforms, so API use needs the paid, API-eligible subscription.

Interactive Brokers API Pricing 2026: Fees, Data, Limits

Education, not investment advice. Past performance does not predict future results. How we check our numbers.

Interactive Brokers' API costs nothing to use: IBKR states that its trading API "is available to all IBKR clients free of cost"¹. What a quant pays for is commissions and market data, and market data through the API has three conditions: an IBKR Pro account, at least USD 500 of equity on top of the subscription cost, and a Level 1 subscription for most instruments, because free on-platform data in TWS does not flow to the API²³⁴. Throughput is capped at market-data lines ÷ 2 requests per second, 50 by default⁵. All of this was read from IBKR's documentation and pricing pages on 2026-10-11. Compare brokers in the Broker API Comparator.

What does the IBKR API cost?

Cost item	Detail
API access	Free to all IBKR clients¹
Account type for API market data	IBKR Pro³
Minimum equity for data	USD 500 for individual accounts, plus the subscription cost⁴
Level 1 data	Required for most securities through the API; forex and crypto need none²
Example subscriptions	US Securities Snapshot and Futures Value Bundle USD 10/month; OPRA Top of Book (L1) USD 1.50/month⁶
Commission waivers	Bundle waived at USD 30 of monthly commissions; OPRA L1 at USD 20⁶
Billing	Once per calendar month, not pro-rated⁷

The waivers are not cumulative: IBKR applies commissions to the highest-priced eligible service first, so USD 30 of commissions waives the USD 10 bundle but not the OPRA fee as well⁶. Commission schedules vary by account type and volume and are not reduced to one number here.

Why doesn't my free TWS data show up in the API?

Because exchanges license on-platform and off-platform display differently. IBKR's docs explain that data provided free inside Trader Workstation "does not provide data via API or 3rd Party platform", and give the example of a Hong Kong L1 bundle listed at HKD 0/month for TWS beside a paid HKD 130/month bundle that also covers the API⁸. Before building, check that each market you need has an API-eligible subscription in Client Portal and that Market Data API access is enabled there³.

What is the API rate limit?

Requests per second equal your market-data lines divided by 2, so 50 per second on the default 100 lines and 100 per second on 200 lines; FIX through IB Gateway allows 250 messages per second⁵. Over the limit, TWS either rejects with error 100 and ends the API session after three violations, or paces requests automatically, depending on a Global Configuration setting⁹. Historical bars of 30 seconds or less add their own pacing rules; the full spec is in IBKR TWS API Rate Limits 2026.

Which API surface should I use?

TWS API (socket): the most complete path; needs TWS or IB Gateway running, with the pacing rules above.
Web API (REST): IBKR's REST interface for trades, portfolio data, market data and contract information, with brokerage-session authentication¹.
FIX: order flow at institutional scale; the 250 messages per second figure applies through IB Gateway⁵.

Where does IBKR fit?

Multi-asset, international or futures strategies: IBKR's coverage is the reason to accept the gateway and subscription overhead.
US-equities-only solo operator: Alpaca's REST API and flat 200 requests/minute are simpler; see Alpaca vs Interactive Brokers API 2026.
Light trader: below the waiver thresholds you pay the data fees, so budget them explicitly.

Verified figures

The free API statement, the IBKR Pro and USD 500 requirements, the Level 1 rule, the forex and crypto exemption, the example subscription prices and waiver thresholds, monthly non-pro-rated billing, the TWS-versus-API data distinction and the rate limit were read from IBKR's documentation and market-data pricing page on 2026-10-11.

Connects to

IBKR TWS API Rate Limits 2026: the pacing rules in full.
Alpaca vs Interactive Brokers API 2026: the head-to-head.
Choosing a Broker API in 2026: the five-broker pillar.
Broker API Comparator: cost and rate models side by side.

References

Interactive Brokers. "Web API: Introduction" ("Our trading API is available to all IBKR clients free of cost"). Read 2026-10-11. https://www.interactivebrokers.com/docs/web-api/introduction ↩ ↩² ↩³
Interactive Brokers. "Market Data Subscriptions: Introduction" (Level 1 required for most securities via the API; forex and crypto need no subscription). Read 2026-10-11. https://www.interactivebrokers.com/docs/general/market-data-subscriptions/introduction ↩ ↩²
Interactive Brokers. "Market Data Requirements" (IBKR Pro account; USD 500 plus subscription costs; subscribe and enable Market Data API access in Client Portal). Read 2026-10-11. https://www.interactivebrokers.com/docs/general/market-data-subscriptions/market-data-requirements ↩ ↩² ↩³
Interactive Brokers. "Market Data Subscription Minimum Equity Balance Requirements" (USD 500 for individual accounts). Read 2026-10-11. https://www.interactivebrokers.com/docs/general/market-data-subscriptions/market-data-subscription-minimum-equity-balance-requirements ↩ ↩²
Interactive Brokers. "TWS API: Pacing Limitations" (lines / 2 requests per second; 100 default lines; FIX via IB Gateway 250 messages per second). Read 2026-10-11. https://www.interactivebrokers.com/docs/tws-api/doc/pacing-limitations/introduction ↩ ↩² ↩³
Interactive Brokers. "Market Data Pricing", Commission Waivers (US Securities Snapshot and Futures Value Bundle USD 10.00, waiver USD 30.00; OPRA Top of Book (L1) USD 1.50, waiver USD 20.00; waivers applied to the highest-priced service first). Read 2026-10-11. https://www.interactivebrokers.com/en/pricing/market-data-pricing.php ↩ ↩² ↩³
Interactive Brokers. "Market Data Costs and Fees" (paid once per calendar month; not pro-rated). Read 2026-10-11. https://www.interactivebrokers.com/docs/general/market-data-subscriptions/market-data-costs-and-fees ↩
Interactive Brokers. "TWS Data vs API Data" (free on-platform data does not cover the API). Read 2026-10-11. https://www.interactivebrokers.com/docs/general/market-data-subscriptions/tws-data-vs-api-data ↩
Interactive Brokers. "TWS API: Pacing Behavior" (reject with error 100 or automatic pacing). Read 2026-10-11. https://www.interactivebrokers.com/docs/tws-api/doc/pacing-limitations/pacing-behavior ↩

Verified engine output

Show the recompute-verified inputs and outputs

Brokers covering options, futures, and crypto together

Inputs
require_futures	1
require_options	1
require_crypto	1

Result
filters › require options	true
filters › require futures	true
filters › require crypto	true
filters › require mcp	false
filters › require free tier	false
filters › max auth complexity	5
results › row 1 › broker › id	ibkr
results › row 1 › broker › name	Interactive Brokers
results › row 1 › broker › url	https://www.interactivebrokers.com/
results › row 1 › broker › docs url	https://www.interactivebrokers.com/en/trading/ib-api.php
results › row 1 › broker › auth	OAuth + TWS/IB Gateway
results › row 1 › broker › auth complexity	5
results › row 1 › broker › order types (10 items)	[...]
results › row 1 › broker › rate limits	Market-data lines / 2 requests per second (50 on the default 100 lines); small-bar history 60 requests per 10 min
results › row 1 › broker › market data › row 1	Global equities via subscription bundles
results › row 1 › broker › market data › row 2	Level-2 depth on most exchanges
results › row 1 › broker › market data › row 3	Historical depth across asset classes
results › row 1 › broker › mcp	official
results › row 1 › broker › mcp note	Official IBKR Connector: remote MCP at api.ibkr.com, IBKR sign-in, one account; drafts trade instructions that you submit as orders yourself
results › row 1 › broker › assets › stocks	true
results › row 1 › broker › assets › options	true
results › row 1 › broker › assets › futures	true
results › row 1 › broker › assets › crypto	true
results › row 1 › broker › assets › forex	true
results › row 1 › broker › assets › bonds	true
results › row 1 › broker › account minimum	0
results › row 1 › broker › commission	Tiered per-share or fixed; ~$0.0035/sh tiered
results › row 1 › broker › good for	Multi-asset-class, international, scale
results › row 1 › broker › has free tier	false
results › row 1 › broker › notes › row 1	Requires TWS or IB Gateway running locally
results › row 1 › broker › notes › row 2	Idempotency via client-supplied orderId
results › row 1 › broker › notes › row 3	Fully headless gateway is possible but under-documented
results › row 1 › score	4
results › row 1 › max score	4
results › row 1 › fits	true
results › row 2 › broker › id	alpaca
results › row 2 › broker › name	Alpaca
results › row 2 › broker › url	https://alpaca.markets/
results › row 2 › broker › docs url	https://alpaca.markets/docs/
results › row 2 › broker › auth	API Key + Secret
results › row 2 › broker › auth complexity	1
results › row 2 › broker › order types (10 items)	[...]
results › row 2 › broker › rate limits	Trading API 200 req/min; market data 200/min free, 10,000/min on Algo Trader Plus
results › row 2 › broker › market data › row 1	IEX real-time (free)
results › row 2 › broker › market data › row 2	Full SIP on Algo Trader Plus ($99/mo)
results › row 2 › broker › market data › row 3	Historical bars + trades + quotes
results › row 2 › broker › mcp	official
results › row 2 › broker › mcp note	Official open-source MCP server (V2 rewrite on FastMCP/OpenAPI); data, paper and live trading
results › row 2 › broker › assets › stocks	true
results › row 2 › broker › assets › options	true
results › row 2 › broker › assets › futures	false
results › row 2 › broker › assets › crypto	true
results › row 2 › broker › assets › forex	false
results › row 2 › broker › assets › bonds	false
results › row 2 › broker › account minimum	0
results › row 2 › broker › commission	$0 (PFOF on equities)
results › row 2 › broker › good for	Solo AI operator, paper-to-live parity
results › row 2 › broker › has free tier	true
results › row 2 › broker › notes › row 1	Free paper trading with same API surface as live
results › row 2 › broker › notes › row 2	Real-time OPRA options data needs Algo Trader Plus; Basic gets the indicative feed
results › row 2 › broker › notes › row 3	Python/Go SDKs mature; rate-limit backoff documented
results › row 2 › score	3
results › row 2 › max score	4
results › row 2 › fits	false
results › row 2 › fail reasons › row 1	Futures
results › row 3 › broker › id	robinhood
results › row 3 › broker › name	Robinhood
results › row 3 › broker › url	https://robinhood.com/
results › row 3 › broker › docs url	https://docs.robinhood.com/
results › row 3 › broker › auth	API key (Crypto Trading API); Robinhood sign-in (Trading MCP)
results › row 3 › broker › auth complexity	3
results › row 3 › broker › order types › row 1	market
results › row 3 › broker › order types › row 2	limit
results › row 3 › broker › order types › row 3	stop
results › row 3 › broker › order types › row 4	stop-limit
results › row 3 › broker › rate limits	Not publicly documented
results › row 3 › broker › market data › row 1	Delayed quotes in public tier
results › row 3 › broker › market data › row 2	Limited historical depth
results › row 3 › broker › market data › row 3	No public Level-2
results › row 3 › broker › mcp	official
results › row 3 › broker › mcp note	Official Robinhood Trading MCP (Agentic Trading): long equities, options and crypto, only in a dedicated agentic account; no multi-leg options
results › row 3 › broker › assets › stocks	true
results › row 3 › broker › assets › options	true
results › row 3 › broker › assets › futures	false
results › row 3 › broker › assets › crypto	true
results › row 3 › broker › assets › forex	false
results › row 3 › broker › assets › bonds	false
results › row 3 › broker › account minimum	0
results › row 3 › broker › commission	$0 (PFOF), $5/mo Gold for margin + extras
results › row 3 › broker › good for	Agent-driven trading from an existing Robinhood account; no REST API for stocks or options
results › row 3 › broker › has free tier	true
results › row 3 › broker › notes › row 1	Official REST API covers crypto only; stocks and options are reachable only through the Trading MCP
results › row 3 › broker › notes › row 2	Trade approvals are off by default for external MCP agents
results › row 3 › broker › notes › row 3	Paper trading unavailable
results › row 3 › score	3
results › row 3 › max score	4
results › row 3 › fits	false
results › row 3 › fail reasons › row 1	Futures
results › row 4 › broker › id	tradier
results › row 4 › broker › name	Tradier
results › row 4 › broker › url	https://tradier.com/
results › row 4 › broker › docs url	https://developer.tradier.com/
results › row 4 › broker › auth	OAuth 2.0
results › row 4 › broker › auth complexity	3
results › row 4 › broker › order types (8 items)	[...]
results › row 4 › broker › rate limits	120 req/min standard and market data, 60 req/min trading (production)
results › row 4 › broker › market data › row 1	Real-time equities + options (streaming)
results › row 4 › broker › market data › row 2	Historical OHLC back ~5 years
results › row 4 › broker › market data › row 3	No Level-2 depth
results › row 4 › broker › mcp	official
results › row 4 › broker › mcp note	Official hosted MCP server (Streamable HTTP, personal API token); market data, accounts and order placement
results › row 4 › broker › assets › stocks	true
results › row 4 › broker › assets › options	true
results › row 4 › broker › assets › futures	false
results › row 4 › broker › assets › crypto	false
results › row 4 › broker › assets › forex	false
results › row 4 › broker › assets › bonds	false
results › row 4 › broker › account minimum	0
results › row 4 › broker › commission	$0 equities (PFOF), $0.35/contract options Pro
results › row 4 › broker › good for	Options-first retail, multi-leg strategies
results › row 4 › broker › has free tier	true
results › row 4 › broker › notes › row 1	Free sandbox with delayed data
results › row 4 › broker › notes › row 2	Strong options chain + multi-leg order API
results › row 4 › broker › notes › row 3	US-only account eligibility
results › row 4 › score	2
results › row 4 › max score	4
results › row 4 › fits	false
results › row 4 › fail reasons › row 1	Futures
results › row 4 › fail reasons › row 2	Crypto
results › row 5 › broker › id	schwab
results › row 5 › broker › name	Schwab
results › row 5 › broker › url	https://www.schwab.com/
results › row 5 › broker › docs url	https://developer.schwab.com/
results › row 5 › broker › auth	OAuth 2.0 (3-legged)
results › row 5 › broker › auth complexity	4
results › row 5 › broker › order types (9 items)	[...]
results › row 5 › broker › rate limits	120 req/min for non-order calls per app; order writes 0-120/min per account, set at app registration
results › row 5 › broker › market data › row 1	Real-time equities + options quotes
results › row 5 › broker › market data › row 2	Historical bars (1m to daily)
results › row 5 › broker › market data › row 3	No exchange depth via API
results › row 5 › broker › mcp	community
results › row 5 › broker › mcp note	No official MCP; community servers wrap the Trader API (self-hosted, re-authorize when the 7-day refresh token expires)
results › row 5 › broker › assets › stocks	true
results › row 5 › broker › assets › options	true
results › row 5 › broker › assets › futures	false
results › row 5 › broker › assets › crypto	false
results › row 5 › broker › assets › forex	false
results › row 5 › broker › assets › bonds	false
results › row 5 › broker › account minimum	0
results › row 5 › broker › commission	$0 equities, $0.65/contract options
results › row 5 › broker › good for	Established retail, post-TDA API migration
results › row 5 › broker › has free tier	true
results › row 5 › broker › notes › row 1	API rebuilt after TD Ameritrade integration; still maturing
results › row 5 › broker › notes › row 2	Orders cover stocks, ETFs and options; futures and forex trade on thinkorswim, not through the API
results › row 5 › broker › notes › row 3	Requires individual developer registration and app review
results › row 5 › broker › notes › row 4	Token refresh flow is finicky vs Alpaca/Tradier
results › row 5 › score	2
results › row 5 › max score	4
results › row 5 › fits	false
results › row 5 › fail reasons › row 1	Futures
results › row 5 › fail reasons › row 2	Crypto
fitting brokers › row 1 › broker › id	ibkr
fitting brokers › row 1 › broker › name	Interactive Brokers
fitting brokers › row 1 › broker › url	https://www.interactivebrokers.com/
fitting brokers › row 1 › broker › docs url	https://www.interactivebrokers.com/en/trading/ib-api.php
fitting brokers › row 1 › broker › auth	OAuth + TWS/IB Gateway
fitting brokers › row 1 › broker › auth complexity	5
fitting brokers › row 1 › broker › order types (10 items)	[...]
fitting brokers › row 1 › broker › rate limits	Market-data lines / 2 requests per second (50 on the default 100 lines); small-bar history 60 requests per 10 min
fitting brokers › row 1 › broker › market data › row 1	Global equities via subscription bundles
fitting brokers › row 1 › broker › market data › row 2	Level-2 depth on most exchanges
fitting brokers › row 1 › broker › market data › row 3	Historical depth across asset classes
fitting brokers › row 1 › broker › mcp	official
fitting brokers › row 1 › broker › mcp note	Official IBKR Connector: remote MCP at api.ibkr.com, IBKR sign-in, one account; drafts trade instructions that you submit as orders yourself
fitting brokers › row 1 › broker › assets › stocks	true
fitting brokers › row 1 › broker › assets › options	true
fitting brokers › row 1 › broker › assets › futures	true
fitting brokers › row 1 › broker › assets › crypto	true
fitting brokers › row 1 › broker › assets › forex	true
fitting brokers › row 1 › broker › assets › bonds	true
fitting brokers › row 1 › broker › account minimum	0
fitting brokers › row 1 › broker › commission	Tiered per-share or fixed; ~$0.0035/sh tiered
fitting brokers › row 1 › broker › good for	Multi-asset-class, international, scale
fitting brokers › row 1 › broker › has free tier	false
fitting brokers › row 1 › broker › notes › row 1	Requires TWS or IB Gateway running locally
fitting brokers › row 1 › broker › notes › row 2	Idempotency via client-supplied orderId
fitting brokers › row 1 › broker › notes › row 3	Fully headless gateway is possible but under-documented
fitting brokers › row 1 › score	4
fitting brokers › row 1 › max score	4
fitting brokers › row 1 › fits	true

Computed live at build time.

Frequently asked questions

Does Interactive Brokers charge for API access?: No. IBKR's Web API documentation says its trading API is available to all IBKR clients free of cost. You pay commissions and any market-data subscriptions, which for API use require an IBKR Pro account and at least USD 500 of equity plus the subscription cost (read 2026-10-11).
What is the Interactive Brokers API rate limit?: Market-data lines divided by 2 requests per second: 50 per second on the default 100 lines, 100 on 200 lines. FIX through IB Gateway allows 250 messages per second. TWS either rejects excess requests with error 100 or paces them, depending on a setting.
How much do IBKR market-data subscriptions cost for API use?: It depends on the markets. Examples from IBKR's pricing page: the US Securities Snapshot and Futures Value Bundle is USD 10/month, waived at USD 30 of monthly commissions, and OPRA Top of Book (L1) is USD 1.50/month, waived at USD 20. Forex and crypto need no subscription.
Why is market data free in TWS but not through the API?: Exchanges license on-platform and off-platform data separately. IBKR's docs note that free TWS data bundles do not provide data via the API or third-party platforms, so API use needs the paid, API-eligible subscription.

The 9 vendor figures on this page, each with its source and the date it was checked, are also in the vendor price reference, where every figure has its own link.