Trading API Integration Services
Already have a trading app, platform or fintech product? SkyInfitech helps you connect it to brokers, market-data providers and financial services through secure, reliable trading API integration. Our trading API developers integrate REST and WebSocket APIs for authentication, live market data, order placement, order status, positions, portfolio, funds and webhooks, so your product can trade, track and notify in real time.
We work inside your existing codebase or as a separate integration service, follow each provider’s official documentation and rules, and deliver integrations that handle errors, reconnections and edge cases properly, not just the happy path.
What Is Trading API Integration?
Trading API integration is the process of connecting your software to a broker's or financial provider's application programming interface (API), so your application can log users in with their broker account, receive market data, place and manage orders, and read positions, holdings and funds programmatically.
A production-ready integration is more than a few API calls. It needs secure authentication and token management, real-time streaming over WebSockets, correct order mapping, status reconciliation, rate-limit handling, retries, logging and monitoring.
A few API calls
A quick, happy-path integration causes failed orders, wrong positions and support tickets.
A production-ready integration
Secure tokens, real-time streaming, correct order mapping, reconciliation, retries and monitoring. Done well, users never notice it.
Who Needs Broker API Integration?
Fintech products
Fintech products that want users to trade through their existing broker account.
Trading app owners
Adding live trading or new brokers to a stock trading app.
Algo and strategy platforms
Platforms that need reliable order execution for their algo trading software.
Brokers
Connecting their front end, back office or brokerage software to exchange, data or partner APIs.
Portfolio and wealth apps
Syncing holdings and positions from users' broker accounts.
Research and analytics tools
Adding live market data and one-click trading.
If your application is already built and you need it connected, this is the right service.
How a Trading API Integration Works
A complete broker API integration is built in layers, each one depending on the one before it.
API
We review the provider's REST endpoints, limits and terms, and build a clean client in your stack.
Authentication
Users connect their broker account securely; tokens are exchanged, stored encrypted and refreshed.
Market data
Instruments, quotes and historical data are loaded and mapped to your application.
Orders
Your app places, modifies and cancels orders, and tracks each order's status.
Positions
Open positions and P&L are fetched and kept in sync with the broker.
Portfolio
Holdings, funds and margins are pulled into your portfolio views.
WebSocket
Live prices and order updates stream in real time, with automatic reconnection.
Notifications
Webhooks and events trigger push, email or in-app alerts for users.
What Our Trading API Integration Covers
REST API Integration
Most trading APIs expose REST endpoints for account, order, position, holdings and funds operations. We build a clean integration layer in your stack that wraps these endpoints with typed request and response models, consistent error handling, pagination and rate-limit control. Your application talks to one stable internal interface, even if the broker's API changes or you add more brokers later.
WebSocket Integration
Real-time trading depends on streaming. We integrate WebSocket APIs for live quotes, market depth and order updates, including:
- Subscribing and unsubscribing symbols efficiently, within provider limits
- Parsing text and binary message formats
- Heartbeats, automatic reconnection and resubscription after drops
- Throttling and batching updates so your UI stays smooth
- Fanning out data to many users through your own backend when required
Authentication
We implement each provider's authentication flow securely, whether it uses OAuth 2.0 login redirects, API key and secret, request tokens, TOTP-based login or session tokens. Our integrations handle token exchange, secure storage, expiry, daily re-login requirements and refresh, and give users a clear reconnect flow when a session ends. Credentials are never hard-coded or exposed to the front end.
Market Data API Integration
Our market data API integration brings live and historical data into your product: LTP, OHLC, market depth, historical candles, instrument master files and corporate data, depending on what the provider offers. We map instrument tokens and symbols across exchanges and segments, cache static data, and respect data licensing and redistribution rules.
Order Placement
We map your application's order model to each provider's format: exchange, segment, product type, order type, validity, quantity, price and trigger price. The integration supports the order types the provider offers, such as market, limit, stop-loss and bracket orders, and validates inputs before sending, so avoidable rejections are caught early. Modify and cancel flows are handled the same way.
Order Status Tracking
After an order is sent, its status must be tracked accurately: open, pending, partially filled, filled, cancelled or rejected. We combine streaming order updates, postbacks or webhooks, and periodic order-book polling to keep your application's state in sync with the broker, including rejection reasons shown in clear language to users.
Positions
We fetch and stream intraday and carry-forward positions with quantity, average price, realised and unrealised P&L. Where the API allows, we support position conversion and exit actions. Reconciliation logic ensures what users see matches the broker's records.
Portfolio and Holdings
Holdings integration brings long-term investments into your product: quantity, average cost, current value and returns. We handle corporate-action changes and multi-account views, so portfolio and wealth apps can show a complete picture.
Funds and Margins
We integrate funds and margin endpoints to show available cash, used margin, collateral and limits by segment. Where supported, we also integrate margin calculators so users see the required margin before placing an order.
Webhooks
Webhooks and postbacks let providers push events to your server, such as order updates, trade confirmations or account events. We build secure webhook receivers that verify signatures or checksums, process events idempotently, retry safely and forward updates to your app, database and notification system.
Notifications
Integration events can trigger user notifications through push, SMS, email or in-app messages: order placed, filled, rejected, session expired or funds updated. Users stay informed without refreshing the app.
Built for Production, Not Just Demos
Error Handling
Trading APIs fail in many ways: network timeouts, expired tokens, rate limits, exchange rejections, partial fills and market-hour outages. Our integrations are designed for these cases.
- Clear classification of errors: retryable, user-actionable and fatal
- Safe retries with backoff, and no duplicate orders on retry
- Idempotency keys or tags to match orders and avoid double placement
- Rate-limit queues that respect provider limits
- Graceful fallbacks when streaming drops, such as switching to polling
- User-friendly error messages mapped from provider error codes
Logging and Monitoring
Every request, response, order event and error is logged with timestamps and correlation IDs, with sensitive data masked. Dashboards and alerts track API latency, error rates, WebSocket health and token expiry, so your team sees problems before users report them. Logs also provide an audit trail for support and compliance.
Security
- API keys, secrets and access tokens stored encrypted in a secrets manager
- All traffic over TLS, with certificate validation
- Server-side handling of credentials; nothing sensitive in the browser or app bundle
- Signature or checksum verification for webhooks and postbacks
- Least-privilege access, IP whitelisting where providers support it
- Masking of personal and financial data in logs
- Security review and testing before go-live
Testing
We test integrations against provider sandboxes or test environments where available, then in controlled live conditions. Testing covers order types, edge cases, reconnection, rate limits, token expiry and market-open load, with automated tests to catch issues when providers change their APIs.
Supported APIs
We integrate broker trading APIs, market-data APIs, payment and KYC APIs, and custom in-house APIs. Below are the types of APIs we integrate.
Don't see your provider? If it offers a documented API, we can review it and confirm feasibility.
Our Trading API Integration Process
Technical review
We study your application, tech stack and the provider's API documentation, terms and limits.
Integration design
Define the data model, authentication flow, order mapping, streaming approach and error strategy.
Development
Build the integration layer, WebSocket handlers, webhooks and UI changes in your codebase or as a separate service.
Testing
Sandbox and controlled live testing, covering edge cases, reconnection and load.
Go-live
Deploy with monitoring and alerts, and support your team during the first trading sessions.
Maintenance
Monitor provider API changes, renew credentials and update the integration as needed.
Estimated Timeline
Market-data integration
What's included: Authentication, quotes, historical data, WebSocket streaming
Single broker trading integration
What's included: Auth, data, orders, status, positions, holdings, funds, webhooks
Multi-broker integration layer
What's included: Common adapter for several brokers, monitoring and admin tools
Timelines depend on the provider's API quality, approval process and your codebase.
Trading API Integration Cost
Integration cost depends on:
- Number of providers and APIs to integrate
- Features needed: data only, or full trading with orders, positions and funds
- REST only, or REST plus WebSocket streaming and webhooks
- Your current tech stack and code quality
- Provider approval, compliance and testing requirements
- Monitoring, admin tools and ongoing maintenance
Get a free, detailed estimate
Share your application details and the APIs you need, and we'll send a free, detailed estimate.
Trading API Integration in India, USA and Australia
India
Broker API integration in India for apps that trade on NSE and BSE through Indian broker APIs.
USA
Trading API integration for the USA with US broker and market-data APIs.
Australia
Broker API integration for Australian apps using ASX-connected brokers and data providers.
Why Choose SkyInfitech as Your Trading API Developers?
Trading-domain experience
We understand orders, positions, margins and market data, not just HTTP calls.
Production-grade integrations
Error handling, reconnection, logging and monitoring included.
Works with your code
We integrate into your existing app with minimal disruption.
Security first
Credentials and user data handled to fintech standards.
Clear documentation
Your team gets documented code and handover.
Ongoing support
We keep integrations updated as provider APIs change.
Frequently Asked Questions
What is trading API integration?
Trading API integration connects your application to a broker's or financial provider's API, so it can authenticate users, receive market data, place and track orders, and read positions, holdings and funds.
Can you integrate a broker API into our existing trading app?
Yes. We work inside your existing codebase or build a separate integration service that your app calls, with minimal changes to your current product.
Do you integrate both REST and WebSocket APIs?
Yes. We use REST for account, order and portfolio operations, and WebSockets for live market data and real-time order updates.
How do you prevent duplicate or failed orders?
We validate orders before sending, use idempotency tags, retry only when safe, and reconcile order status through streaming updates, webhooks and polling.
Which brokers and APIs do you support?
We integrate broker trading APIs, market-data APIs, payment and KYC APIs, and custom APIs. Contact us with your provider and we'll confirm support and feasibility.
How long does a broker API integration take?
A market-data integration usually takes 1–3 weeks, a single broker trading integration 3–6 weeks, and a multi-broker layer 2–4 months.
Do you provide support after integration?
Yes. We monitor integrations, update them when provider APIs change, and provide ongoing maintenance.
Do you offer trading API integration for USA and Australia?
Yes. We provide trading API integration services for clients in India, the USA, Australia and other markets.
Explore Our Trading Software Solutions
Need more than one product? Explore our other trading and investment software development services.
Ready to Connect Your Application?
Tell us about your app, tech stack and the APIs you need. Our trading API developers will review the documentation and send a clear integration plan, timeline and estimate.
