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Trading API Integration

Trading API Integration Services

We build custom integrations that connect trading software, strategies, platforms, brokers, exchanges, market data services, and external trading software through existing APIs, trading interfaces, and supported connectivity protocols.

Broker & Exchange APIsREST & WebSocketFIX ProtocolMarket DataOrder ExecutionMulti-API Integration
3,000+ Projects Delivered
Clear Scope, Price & Timeline
Source Code & Full IP Ownership
Post-Delivery Support
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    service overview

    Connect Trading Systems Through Existing APIs

    Nordman Algorithms provides custom trading API integration services for projects that need trading software, strategies, platforms, brokers, exchanges, market data services, or external systems to communicate reliably. We integrate with existing APIs and connectivity interfaces; the service focuses on connecting trading systems rather than creating a standalone API product.

    An integration can be built for a focused task such as market data or order execution, or for a broader workflow that combines authentication, real-time data, account state, symbol mapping, order lifecycle management, routing, synchronization, logging, and recovery logic. The architecture is selected around the interfaces and technical constraints of the connected systems.

    integration scope

    Specialized Trading API Integration Services

    Some integration projects are large enough to become their own specialized service. Broker APIs, crypto exchanges, market data, and FIX each have their own technical requirements, while this page covers the broader trading API integration workflow.

    SPECIALIZED SERVICE

    Broker API Integration

    Connect trading strategies, execution systems, analytics software, and external trading tools to broker APIs for order execution, account data, positions, fills, and synchronization.

    Orders & FillsPositionsAccount Data
    SPECIALIZED SERVICE

    Crypto Exchange API Integration

    Connect trading systems to cryptocurrency exchanges for real-time data, spot or derivatives trading, account state, and automated execution through exchange interfaces. Typical exchange environments can include Binance, Bybit, OKX, and other exchanges with suitable REST and WebSocket interfaces.

    REST + WebSocketSpot / DerivativesExecution
    SPECIALIZED SERVICE

    Market Data API Integration

    Integrate real-time and historical financial data feeds with trading models, research workflows, databases, analytics systems, dashboards, and monitoring tools.

    Real-TimeHistoricalNormalization
    SPECIALIZED SERVICE

    FIX API Integration

    Implement FIX connectivity for professional broker, venue, execution, or market-data environments that provide FIX access and technical specifications.

    SessionsExecutionConnectivity

    Trading Platform Interfaces

    Connect external trading software to platform APIs, native interfaces, extensions, or platform-side bridge components.

    External Trading Software & Servers

    Connect Python, C#, analytics engines, proprietary trading systems, servers, databases, and other external software to existing trading interfaces.

    Integration Middleware & Connectors

    Build adapters, bridges, normalization, routing, and synchronization layers when connected systems cannot communicate directly.

    One service, different integration scopes.Broker APIs, crypto exchanges, market data feeds, and FIX each come with different data formats, trading functions, access rules, and connection requirements.
    api integration capabilities

    What Can a Trading API Integration Do?

    An integration can cover one part of the trading workflow or combine several functions — for example market data, order execution, and account synchronization.

    01

    Market Data

    Receive real-time prices, quotes, ticks, order book data, volume, instrument information, and other market data available through the connected interface.

    QuotesTicksOrder BookInstruments
    02

    Historical Data

    Retrieve historical bars, ticks, trades, or other supported datasets for charting, analytics, research, and strategy testing.

    BarsTicksTradesBacktesting Data
    03

    Order Execution & Trade Management

    Submit, modify, and cancel orders; process fills, partial fills, rejections, stop-loss and take-profit changes, and supported execution events.

    OrdersFillsSL / TPOrder Status
    04

    Account & Position Data

    Access balances, margin, positions, working orders, account status, and other supported account information for monitoring, risk management, and synchronization.

    BalancesMarginPositionsAccount State
    MARKET DATA PROVIDERS & FEEDS

    Real-time, historical, or combined data integrations can be assessed for providers such as Massive (formerly Polygon.io), Databento, and Alpaca Market Data, as well as broker- or exchange-provided feeds.

    Massive / Polygon.ioDatabentoAlpaca Market DataBroker / Exchange Feeds
    Integration scope is API-dependent.Not every broker, exchange, platform, or data provider exposes all four capability areas. We define the project around the functions actually available in the target interface.
    integration workflow

    How the Integration Layer Works

    The integration layer makes two systems work together. It handles access, translates symbols and data, checks instructions, sends trading actions, keeps account state synchronized, and recovers from connection problems.

    AUTH

    Authentication & Sessions

    Handle API keys, OAuth, tokens, certificates, sessions, permissions, renewal, and provider-specific access requirements.

    MAP

    Data & Symbol Mapping

    Match symbols, contracts, IDs, timestamps, price formats, and data structures so both systems interpret the same information correctly.

    RULE

    Validation & Rules

    Check the instruction, account state, order type, quantity, symbol, and project-specific rules before anything is sent for execution.

    EXEC

    Routing & Execution

    Translate approved actions into the destination format and route orders, modifications, cancellations, or data requests to the correct connection.

    SYNC

    State Synchronization

    Keep orders, fills, positions, balances, and account updates synchronized between the connected systems.

    SAFE

    Reliability & Recovery

    Handle rate limits, retries, reconnects, duplicates, timeouts, rejected operations, unavailable endpoints, logging, and reconciliation.

    API keys & access.Credential handling is agreed before development. Where the provider supports it, sandbox or demo access and restricted API permissions are preferred for testing; production access is configured according to the final deployment model.
    common api workflows

    How Trading APIs Fit Into a Trading Workflow

    API integration can sit at different stages of a trading system. These examples show how market data, strategy logic, risk controls, execution, and account state connect in real projects.

    Market Data→Strategy / Analysis→Risk & Sizing→Execution→Broker / Exchange→Positions & Account State
    01

    Market Data API → Strategy Engine

    Real-time prices, ticks, order book data, or other feeds are received, normalized, and passed into the strategy or analytical logic.

    StreamingNormalizationMarket Data
    02

    Historical Data API → Research & Backtesting

    Historical bars, ticks, trades, or other datasets are retrieved for research, calculations, strategy validation, and backtesting workflows.

    HistoryResearchBacktesting
    03

    Strategy Signal → Risk & Sizing → Broker API

    The strategy generates a trading decision, account and risk rules determine order size, and the approved instruction is sent to the broker for execution.

    Strategy LogicRisk ChecksExecution
    04

    Trading Strategy ↔ Binance / Bybit API (and other Crypto Exchange APIs)

    REST and WebSocket connections feed market and account data into the trading logic while orders and management commands are sent back to the exchange.

    REST + WebSocketDataOrders
    05

    One Strategy Engine → Multiple Broker APIs

    A shared strategy layer routes trades through different broker connections while adapters handle symbols, account rules, order formats, and connection-specific behavior. For example, one strategy layer can route through Interactive Brokers, Tradovate, or other supported broker/execution interfaces while maintaining separate mapping and account logic.

    Multi-BrokerRoutingMapping
    06

    Broker / Exchange API → Positions, Fills & Monitoring

    Execution reports, fills, working orders, balances, positions, and account events are synchronized back into the trading and monitoring environment.

    FillsPositionsAccount State
    platform & environment integration

    Trading API Integration by Platform & Environment

    The connection method depends on the target environment. Some systems provide a direct external API, while others need a native platform component, connector, or bridge.

    Interactive Brokers logo

    Interactive Brokers API Integration

    Broker API

    Connect custom trading or analytics software to supported Interactive Brokers interfaces for data, account information, and order execution workflows. Integrations can be built around the IBKR TWS API, IB Gateway, or IBKR Web API, depending on the required workflow.

    Python / C# System → Broker InterfaceStrategy Engine → Order ExecutionMarket / Account Data → External System
    MetaTrader 5 logo

    MetaTrader 5 Integration

    Platform Bridge

    Connect external trading software to MT5 workflows using the appropriate integration architecture, including platform-side components when direct external access is limited.

    External Server → MT5Python / External Logic ↔ MT5MT5 Data / Execution ↔ External System
    NinjaTrader logo

    NinjaTrader Integration

    Native / External Integration

    Integrate external trading software, analytics engines, or servers with NinjaTrader through native components and project-specific connectivity logic.

    External System → NinjaTraderServer ↔ NinjaTraderData / Commands ↔ Native Component
    cTrader logo

    cTrader Integration

    Platform API

    Build custom integrations around cTrader connectivity for trading, account, data, or external-system workflows.

    External System → cTraderStrategy Service ↔ cTraderAccount / Execution Data → External System
    cTrader Open API docs →
    other environments

    Other Brokers, Exchanges, Platforms & Data Providers

    Not listed above doesn't mean unsupported — many other brokers, exchanges, platforms, and data providers can still be integrated. Share whatever API or interface documentation is available (a link is usually enough) and we'll assess whether REST, WebSocket, FIX, webhook, or another connectivity method fits the project.

    Discuss Your Environment →
    api protocols & connectivity

    Connectivity Methods We Integrate With

    The protocol is selected by the connected service and the workflow required. A single project may combine several methods.

    REST

    REST APIs

    Request-response operations for account data, historical data, instruments, order actions, configuration, and other supported endpoints.

    WS

    WebSocket APIs

    Persistent connections for streaming market data, order updates, account events, and other real-time messages exposed by the provider.

    FIX

    FIX Protocol

    Structured broker or venue connectivity for professional execution and data workflows where the target environment provides FIX access.

    LIB

    Vendor Libraries, Webhooks & Native Interfaces

    Official client libraries or SDKs, event-driven webhooks, native platform extensions, and other interfaces used when REST or WebSocket alone is not the correct architecture.

    JSONXMLOAuthAPI KeysTLSCertificates
    development process

    How a Trading API Integration Is Delivered

    We start with the systems you need to connect and the available API documentation, then define the data flow, build the integration, test failure scenarios, and prepare it for deployment.

    Integration project delivery
    01
    Integration Assessment
    Review systems, APIs, documentation, permissions, endpoints, and workflow requirements.
    02
    Architecture & Scope
    Define authentication, objects, symbols, accounts, events, routing, data flow, and the scope to be built.
    03
    Fixed Quote
    Price, scope, and timeline agreed before development begins.
    04
    Integration Development
    Build adapters, platform-side components, middleware, integration logic, and rate-limit, reconnect, retry, duplicate, timeout, and error-state handling.
    05
    Testing & Recovery Validation
    Validate sandbox or test-environment scenarios where available, verify end-to-end behaviour, and confirm error-state recovery.
    06
    Delivery & Support
    Deliver source code, deployment guidance, documentation, and agreed post-delivery support.
    To Get Started

    Send the systems you need to connect and the technical information available for each side of the integration.

    API / Interface DocumentationSource & Destination SystemsRequired Data FlowAccount / Execution RequirementsSample Payloads or Test Access
    At Delivery

    The delivery package depends on the final architecture and the connected environment.

    Integration Source CodeConfiguration / Deployment FilesSetup GuidanceIntegration DocumentationAgreed Post-Delivery Support
    Typical timeline.A straightforward, well-documented single-provider integration may take around 1–2 weeks. Projects involving multiple APIs, FIX, complex execution logic, platform-side components, or extensive testing can take longer. We confirm the timeline after the technical assessment.
    why nordman algorithms

    Why Work With Nordman Algorithms

    Practical development experience, clear project terms, and trading-focused communication from request to delivery.

    Multi-Platform & API ExpertiseTrading API developer experience across trading platforms, APIs, and custom software environments.
    NDA & Source Code OwnershipConfidentiality agreements available. Source code ownership transferred where applicable.
    Fixed Pricing & Clear ScopeDefined requirements, project scope, pricing, and timelines before development begins.
    Responsive SupportTechnical assistance throughout the project lifecycle, including post-delivery support, troubleshooting, and bug fixes.
    Understanding Trading WorkflowsUnderstanding trading workflows, automation concepts, and platform-specific requirements helps streamline communication and project planning.
    Products & Custom DevelopmentAlongside client projects, Nordman develops and maintains its own trading software products.
    faq

    Trading API Integration — Common Questions

    Common questions about broker APIs, trading platform integrations, REST, WebSocket, FIX, market data, and execution connectivity.

    Trading API integration connects existing trading software with a broker, exchange, trading platform, market data service, or external system through an available API, protocol, client library, or native interface. The integration can exchange data, send trading actions, receive account state, or combine several functions in one workflow.

    As a trading API developer, we integrate with existing APIs and supported connectivity interfaces. We can build the adapters, middleware, connectors, and platform-side components required for the integration, but we do not build a standalone API as the product itself.

    Depending on the broker API, an integration may handle market data, historical data, orders, modifications, cancellations, fills, positions, balances, margin, account status, and other supported functions. The exact scope depends on what the provider exposes.

    REST is commonly used for request-response operations such as account queries, historical data, configuration, and supported order actions. WebSocket connections are commonly used for streaming data and real-time events. Many trading integrations use both.

    Yes, when the target broker, venue, or provider offers FIX access and the project requirements match the available FIX sessions, message flows, permissions, and infrastructure.

    Yes, subject to technical assessment. A multi-API architecture can use separate adapters for each broker or provider while exposing a normalized internal model to the core trading system.

    Yes, when the target platform provides a suitable API, official client library, or integration path. Where direct external access is limited, the architecture may require a native platform-side component that communicates with the external trading software.

    No. API capabilities vary by broker, exchange, platform, account type, permissions, and subscription. A project can use only the functions actually exposed by the target interface.

    Depending on the project, the integration can include reconnect logic, retries, timeouts, duplicate protection, rate-limit handling, logging, reconciliation, and defined responses to rejected or unavailable operations.

    We normally need the source and destination systems, available API or interface documentation, required data and execution flow, account or routing requirements, authentication method, and any available sample payloads, sandbox access, or reference implementation.

    Credential handling is agreed before development. Where the provider supports it, sandbox or demo access and restricted API permissions are preferred for testing. Production access is configured according to the final deployment architecture and the provider’s security model.

    A straightforward, well-documented single-provider integration may take around 1–2 weeks. Multi-API, FIX, complex execution, native platform components, or extensive testing can extend the timeline. We confirm the schedule after the technical assessment.

    If a provider later versions, changes, or deprecates an interface used by the integration, the required update can be reviewed and scoped as follow-up work. The impact depends on what changed and which parts of the integration are affected.

    Yes. Source code and full IP ownership are transferred on final delivery and full payment unless a different arrangement is agreed in writing for a specific project.

    Discuss Your Trading API Integration

    Send us the systems you need to connect, the available API or interface documentation, and a short description of the required data, execution, account, or synchronization workflow. We will review the technical feasibility and define the integration scope.

    Free Technical Assessment
    Architecture Defined Before Development
    Source Code Ownership