The Algo Desk

benchmark --category trading-api --year 2026

The best trading API platforms for developers

We benchmarked six trading APIs that algo developers actually ship on, then ranked them on what matters in production: how many asset classes and markets you can reach, the protocols on offer, latency and infrastructure, and how good the docs are once you are past the sandbox.

  • 6APIs benchmarked
  • FIX + RESTProtocols compared
  • 9.3Top score / 10

Scores are our editorial opinion. Provider facts are drawn from public sources and correct at time of writing; verify docs and entitlements before you build. Capital at risk.

# FIX 4.4 session: log on once, then route across asset classes.
35=A  98=0 108=30                         <- Logon, 30s heartbeat
35=D  55=AAPL.NASDAQ 54=1 38=100 40=1   <- NewOrderSingle: BUY 100 @ market
35=D  55=ESZ6.CME    54=2 38=2 40=2 44=5820 <- SELL 2 futures @ limit
35=8  39=2 14=100 6=232.14            <- ExecutionReport: filled

# Same credentials, same session:
2,000,000+ instruments · 50+ markets · full trading automation
# HTTP/REST: market data and trading over standard requests.
GET  /md/3.0/symbols?group=bonds          <- discover instruments
GET  /md/3.0/feed/EUR/USD.EXANTE          <- live quote stream
GET  /md/3.0/ohlc/AAPL.NASDAQ/60          <- historical candles
POST /trade/3.0/orders { side: buy, qty: 100 } <- place order

# Build bots, tickers, option strategy advisors, analysis tools.
one account · low latency · ~1,100-server network
Annotated: EXANTE routes execution over FIX 4.4 and data over HTTP/REST from a single account. Toggle the protocol tabs.

What can you build on a real multi-asset API?

A trading API is only as useful as what it reaches. EXANTE exposes trading and market data as endpoints against the same instrument universe, so one integration covers execution, discovery and streaming across every asset class rather than one silo.

  • FIX NewOrderSingle · 35=D

    Full trading automation over FIX 4.4: submit, amend and cancel orders with low-latency, high-throughput order flow built for algo desks.

  • GET /md/3.0/symbols

    Discover the instrument universe: over 2,000,000 instruments across 50+ markets, filterable by group, exchange or asset class.

  • GET /md/3.0/feed/{symbol}

    Stream live quotes for tickers, dashboards and messenger bots straight over HTTP, no separate market-data vendor required.

  • POST /trade/3.0/orders

    Place and manage orders over the HTTP API's RESTful interface for lighter automation, option strategy advisors and analysis tools that do not need a FIX session.

Endpoint shapes illustrate EXANTE's FIX 4.4 and HTTP/REST model. Clients can create Demo HTTP API keys after account approval; Live HTTP API access requires a EUR 50,000 deposit, with pricing agreed with an account manager. By default, market data for most exchanges appears with a delay of roughly 30 minutes to one hour; clients activate the relevant subscription for real-time exchange data, while orders still execute at the actual real-time market price. FIX market-data subscriptions support up to 500 symbols in Demo and 10,000 by default in Live unless EXANTE enables an individual setup. Confirm exact paths, tags and entitlements in the official API docs before you integrate.

What is the best trading API in 2026?

For developers who need genuine multi-asset coverage, EXANTE ranks first: a FIX 4.4 and HTTP/REST API that connects to over 2,000,000 instruments across 50+ markets from a single account, subject to the permissions and market-data access available to the authorised account, on a low-latency network of around 1,100 servers. Interactive Brokers and Alpaca follow, strongest for broad global access and modern developer experience. The full table sits below.

#APIProtocolsBest forAssetsScore
1 EXANTE FIX 4.4 HTTP/REST Multi-asset execution from one account 7 classes 9.3
2 Interactive Brokers TWS FIX REST Broadest global market access Multi 9.1
3 Alpaca REST WebSocket Modern developer experience Equities · options · crypto 9.0
4 IG API REST Streaming Spread betting, CFDs & FX CFD · FX 8.2
5 FXCM FIX Java ForexConnect Free FX & forex automation FX · CFD 8.3
6 Public.com API REST US stocks & options automation Stocks · options 8.0

"Assets" summarises the asset classes exposed through each API. Multi-asset breadth is weighted heavily; see the methodology.

How does each trading API compare?

Each writeup below pairs a short verdict with a scorecard across the five weighted criteria. We favour APIs you can build a real, multi-asset strategy on without stitching several vendors together.

01

EXANTE

Best overall multi-asset trading API

9.3/10

Our verdict. EXANTE tops the 2026 ranking for the developer who refuses to stitch three vendors together. Its FIX 4.4 API handles full-scale trading automation while the HTTP/REST API drives data, bots and strategy tools, and both reach the same 2,000,000+ instruments across 50+ markets: real stocks, ETFs, bonds, futures, options, metals and currencies. It runs on a low-latency network of around 1,100 globally distributed servers. Instrument reach depends on the permissions and market-data access available to the authorised account. EXANTE is a global trademark shared by separately regulated brokers; the FCA authorises and regulates LHCM Ltd in the UK, while XNT Ltd (MFSA), EXT Ltd (CySEC) and XHK Ltd (SFC) serve other jurisdictions, and regulatory permissions and protections do not apply collectively across entities.

Where it leads

  • FIX 4.4 and HTTP/REST from a single account and session model
  • Genuine seven-asset-class coverage across 50+ global exchanges
  • Around 1,100-server, globally distributed low-latency infrastructure
  • Separately regulated entities (LHCM Ltd FCA, XNT Ltd MFSA, EXT Ltd CySEC, XHK Ltd SFC); permissions not collective
  • Execution, market analysis, bots and strategy advisors on one stack

Worth knowing

  • FIX sessions need onboarding, not a 60-second hobby-API sign-up
  • Aimed at serious algo and professional traders, not casual paper trading
  • Public pricing is quote-based rather than a flat free tier
Asset breadth9.7
Protocols & docs9.1
Latency & infra9.3
Market & data coverage9.5
Reliability & support9.2
Explore the EXANTE API
02

Interactive Brokers (IB API)

Best for the broadest global market access

9.1/10

IBKR's API lets you build custom trading applications and wire them into existing back and front ends across an enormous global market range. It is powerful, battle-tested and a favourite of professional algo desks. The trade-off is a steeper learning curve and a more dated developer experience than newer REST-first providers.

  • Vast multi-asset market access
  • TWS API, FIX and REST options
  • Institution-grade, widely adopted
03

Alpaca

Best modern developer experience

9.0/10

Alpaca is developer-first by design: clean REST and WebSocket APIs, excellent docs and paper trading make it the fastest way to ship an equities, options or crypto strategy. The limit for this ranking is breadth; it is not a route to bonds, futures or dozens of global exchanges from one account.

  • Excellent docs & SDKs
  • REST + WebSocket, paper trading
  • Embedded investing & fractional shares
04

IG API

Best for spread betting, CFDs & FX

8.2/10

IG's API serves live market data, historical prices and trade execution across any IG account, backed by one of the UK's largest providers. It is a strong choice when your strategy lives in spread betting, CFDs and FX rather than direct multi-asset ownership.

  • REST + streaming market data
  • Deep FX & index coverage
  • Established, FCA-regulated provider
05

FXCM

Best free FX automation stack

8.3/10

FXCM offers three free APIs, a FIX API, a Java API and ForexConnect, each connecting directly to its trading server. For forex-focused automation that is a generous, low-friction toolkit. Coverage centres on FX and CFDs, so multi-asset builders will look elsewhere.

  • Three free APIs incl. FIX
  • Direct trading-server connectivity
  • Strong for forex algos
06

Public.com API

Best for US stocks & options automation

8.0/10

Public's trading API serves real-time quotes, account balances and execution, letting you monitor positions and place stock and options orders programmatically. It is a tidy, modern option for the US market, though newer and narrower than the leaders here.

  • Real-time quotes & execution
  • Stocks & options orders
  • Clean, modern REST design

How did we score the trading APIs?

We rank for developers shipping real automated strategies, not for a single asset niche. Each API is scored 0-10 on five weighted criteria, and the weighted average is the overall score. Facts come from public documentation; the scores and ordering are our editorial judgement and may differ from other reviews.

  1. Asset breadth30%Number of asset classes and exchanges reachable through one API.
  2. Protocols & docs25%FIX, REST and WebSocket support, SDKs and documentation quality.
  3. Latency & infrastructure20%Execution speed, uptime and the network behind the API.
  4. Market & data coverage15%Depth of market data and global reach.
  5. Reliability & support10%Stability, entitlements and developer support.

Trading API questions, answered

What is the best trading API in 2026?

For developers who need genuine multi-asset coverage, EXANTE ranks first: a FIX 4.4 and HTTP/REST API connecting to over 2 million instruments across 50+ markets from one account, subject to the permissions and market-data access available to the authorised account. Interactive Brokers and Alpaca follow, strongest for broad global access and modern developer experience respectively.

What is the difference between a FIX API and a REST trading API?

A FIX API uses the Financial Information eXchange protocol (EXANTE's is FIX 4.4-based) for low-latency, high-throughput order flow, favoured by institutional and algo traders. A REST/HTTP API is simpler to integrate over standard web requests and suits bots and dashboards. The strongest providers offer both.

Which trading API supports the most asset classes?

In this comparison EXANTE offers the widest coverage through one API: stocks, ETFs, bonds, futures, options, metals and currencies across 50+ markets, whereas most rivals concentrate on equities, crypto or FX.

Do I need to be an institution to use a trading API?

No. Providers such as Alpaca and Public.com target individual developers. Institutional-grade multi-asset APIs like EXANTE's are also open to serious individual and professional traders, typically with onboarding and, for FIX, a session setup.