Trading Bots By Broker

The short answer, from FullStack Alpha: Interactive Brokers and Alpaca are the easiest brokers to automate, because both have official APIs and free paper accounts. TradeStation, E*TRADE, Tradier and Webull also connect to popular bots like Trade Ideas, StockHero, Surmount and TradersPost. Fidelity has no public trading API, and Robinhood routes AI agents through its own Agentic Trading program, based on FullStack Alpha’s September 2026 check.

Here’s the question almost nobody asks before paying for an AI trading bot: does it even connect to my broker?

It’s the most common reason a new subscription ends up unused. The bot works. It just doesn’t work with the account you already have.

By the numbers: trading bots by broker

Four numbers that frame this topic, each linked to its source. Checked September 2026 and reviewed monthly.

How to use this section

Find your broker. Each page answers the same five questions:

1. Does the broker allow automated trading at all?
2. How does a bot connect? Official API, OAuth partner login, or TradingView webhook.
3. Which AI trading bots are compatible, and which ones claim support but rely on workarounds.
4. Is there a paper trading account so you can test the connection first?
5. Which countries are locked out of the API or the bots.

Which bots work with which broker (September 2026)

FullStack Alpha compiled this table from each bot’s published list of supported brokers. A bot missing from a row may still connect through a webhook tool, but we only list connections the vendor publishes.

Updated September 30, 2026 by Jay Rocco for FullStack Alpha. Picks are reviewed monthly. Prices were checked on vendor sites in September 2026 and change often, so confirm before you pay.

Broker	Official API	Paper or test account	Bots that list it
Interactive Brokers	Yes: TWS API, Web API, MCP connector	Free paper account	Trade Ideas, TradersPost, QuantConnect
Alpaca	Yes, plus an MCP server	Free paper API	Trade Ideas, StockHero, Surmount, TradersPost
TradeStation	Yes	SIM environment	Trade Ideas, StockHero, Surmount, Option Alpha, TradersPost
E*TRADE	Yes	Sandbox keys; Power E*TRADE paper	Trade Ideas, StockHero, Surmount, TradersPost
Tradier	Yes	Sandbox	StockHero, Option Alpha, TradersPost
Webull	Yes: OpenAPI	Paper trading with API simulation	StockHero, TradersPost
tastytrade	Yes	Developer sandbox	Option Alpha, TradersPost
Charles Schwab	Yes: Trader API	thinkorswim paperMoney	Build your own
moomoo	Yes: OpenAPI	Paper trading	Build your own
Robinhood	Agentic Trading over MCP (beta)	None	Robinhood Agents, TradersPost
Fidelity	No public trading API	None	None we could verify

Interactive Brokers

The default broker for serious automation, with the TWS API, a Web API and a free paper account that mirrors live trading. Since July 28, 2026, its MCP connector lets AI tools like Claude Code and Cursor reach your account, and every order still needs your approval. The tradeoff is setup work: the gateway has to stay logged in.

Read next: Interactive Brokers TWS API: Setup, Costs, and the Limits That Bite

Alpaca

Built API first, with commission free US stock trading, a free paper environment and an official MCP server that defaults to paper. Alpaca raised $135 million in July 2026 to build what it calls agent first brokerage infrastructure, so expect new AI tools to plug in here early.

Read next: Alpaca API for Beginners: Keys, Paper Trading, and Your First Order

TradeStation

The most widely supported broker among the bot platforms we track. It is the only broker on StockHero’s $49.99 Lite plan, Option Alpha is free with a TradeStation account of at least $10,000, and EasyLanguage lets you automate strategies inside the platform itself.

Read next: Broker With API: 7 That Let a Bot Place Real Orders

E*TRADE

E*TRADE, owned by Morgan Stanley, still issues personal API keys with a sandbox for testing. Its login flow uses an older OAuth standard, so budget more setup time than you would for Alpaca.

Read next: E*TRADE Paper Trading: 5 Steps to a Practice Account

Tradier

An API first broker popular with options traders and third party platforms. A sandbox lets you test before going live, and Option Alpha is free with a Tradier account of $5,000 or more.

Read next: Broker With API: 7 That Let a Bot Place Real Orders

Webull

Webull opened its OpenAPI to individual investors with sandbox testing, and on July 21, 2026 it added OpenAPI simulation to paper trading. That makes it one of the few big retail apps where a bot can practice on the same interface it will trade on.

Read next: Webull Paper Trading: How to Test a Strategy Before Real Money

tastytrade

The options seller’s broker. tastytrade offers an open API with a developer sandbox, and Option Alpha is free with a $5,000 account. Pick it when your automation is mostly options.

Read next: tastytrade review on the FullStack Alpha editorial desk

Charles Schwab

Schwab’s Trader API is open to individuals for their own accounts. The friction is the refresh token, which expires every 7 days, so a Schwab bot needs you to log in about once a week. That makes Schwab a build it yourself broker for now.

Read next: Schwab API Guide: What Traders Can Automate and What They Can’t

moomoo

A commission free app with free paper trading and an OpenAPI that supports moomoo US accounts. None of the no code platforms in our table list moomoo, so this is for people writing their own Python.

Read next: moomoo review on the FullStack Alpha editorial desk

Robinhood

Robinhood still has no paper trading and no classic REST API for stock bots. Instead it launched Agentic Trading in May 2026, which connects outside AI agents over MCP to a separate funded account, then announced built in Robinhood Agents on September 29, 2026.

Read next: Does Robinhood Have Paper Trading? The Answer and 3 Free Alternatives · Robinhood AI Trading Bot Free: Connect Claude in 3 Minutes

Fidelity

At our last check, Fidelity offered no public trading API for individual accounts. If automation is the plan, open a second account at one of the brokers above and keep Fidelity for long term holdings.

Read next: Broker With API: 7 That Let a Bot Place Real Orders

Three rules that save money

• An official connection beats a clever workaround. Unofficial logins can break overnight and can put your account at risk.
• Test the connection on paper first. A bot that places the wrong order size on paper will do it live too.
• Check the API key permissions. A trading key should place and cancel orders. It should not be able to move money out. Our Broker APIs section shows how to check.

Which bots trade through which broker

Real trader pain points, answered

Real comments from Trustpilot, quoted as posted. Each one gets a straight answer from FullStack Alpha and a link to the guide that fixes it.

From the FullStack Alpha blog

Related guides on this site, written and edited by Jay Rocco:

• Broker With API: 7 That Let a Bot Place Real Orders
• Interactive Brokers TWS API: Setup, Costs, and the Limits That Bite
• Schwab API Guide: What Traders Can Automate and What They Can’t
• Alpaca API for Beginners: Keys, Paper Trading, and Your First Order
• Webull Paper Trading: How to Test a Strategy Before Real Money
• E*TRADE Paper Trading: 5 Steps to a Practice Account
• Robinhood AI Trading Bot Free: Connect Claude in 3 Minutes

Our take

Here is the uncomfortable truth about broker support: plenty of bots list a broker logo on their homepage and then connect through a workaround that breaks the first time the broker changes a login screen. We care less about the logo and more about the plumbing. Official API, partner login, or webhook. Paper account first. If a bot cannot show you how it connects, it has not earned access to your account.

Quick answers

Can I automate my trading with Interactive Brokers?

Yes. Interactive Brokers supports automated trading through its TWS API and Web API, and many third party platforms connect to it. Start on an IBKR paper trading account, which mirrors the live platform, before you let any bot place real orders.

Does Robinhood allow trading bots?

At our last check, Robinhood did not offer an official public API for automated stock trading. Tools that claim Robinhood support usually rely on unofficial methods that can break or conflict with its terms. If automation matters, pick a broker with an official API.

Which broker is best for algorithmic trading?

For most retail builders, Interactive Brokers and Alpaca lead because both have public APIs and paper accounts. Interactive Brokers offers the widest market access. Alpaca is simpler to start with. The right pick depends on your markets, country, and account size.

Related reading

• Building your own bot? Go to Broker APIs and Build a Trading Bot.
• Want an app instead of code? See AI Trading Apps.
• Comparing broker platforms beyond bots? The FullStack Alpha directory at aistockpickerapps.com covers broker reviews alongside 200+ AI stock tools.

Broker compatibility verified by Jay Rocco, Founder and Editor of FullStack Alpha. Broker terms change, so each page shows the month it was last checked. Educational content only, not financial advice.

Stay alpha.