# IntelligentCross FIX Order Entry API

**Canonical:** https://apis.io/apis/imperative-execution/intelligentcross-fix-order-entry-api/  
**Provider:** Imperative Execution — https://apis.io/providers/imperative-execution/  
**Base URL:** https://www.imperativex.com/contact  
**Documentation:** https://www.imperativex.com/faq

IntelligentCross FIX Order Entry API is one of 2 APIs that [Imperative Execution](https://apis.io/providers/imperative-execution/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Trading, Order Entry, FIX Protocol, Equities, and Alternative Trading System. The published artifact set on APIs.io includes API documentation and authentication docs.

Order entry into the IntelligentCross ATS books (Midpoint, ASPEN Fee/Fee, ASPEN Maker/Taker, ASPEN Taker/Maker) is accepted only over FIX connections; the ATS currently supports FIX 4.2. Subscribers must be registered US broker-dealers in good standing with an SRO, and reach the matching engines through NY4 cross-connects or a network service provider with an NY4 presence. Book selection is affirmative via the FIX ExDestination[100] tag and defaults to ASPEN Fee/Fee. The FIX specification is provided to subscribers on request from ops@intelligentcross.com.

## Machine-readable artifacts (3)

- **Documentation** — https://www.imperativex.com/faq
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/imperative-execution/refs/heads/main/authentication/imperative-execution-authentication.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/imperative-execution/refs/heads/main/conventions/imperative-execution-conventions.yml

## Other Imperative Execution APIs (1)

- [IntelligentCross IQX Market Data Feed](https://apis.io/apis/imperative-execution/intelligentcross-iqx-market-data-feed/)

## Tags

Trading, Order Entry, FIX Protocol, Equities, Alternative Trading System

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/imperative-execution/intelligentcross-fix-order-entry-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/imperative-execution/.