# OneChronos US Equities ATS (FIX 4.2)

**Canonical:** https://apis.io/apis/onechronos/onechronos-us-equities-ats-fix-42/  
**Provider:** OneChronos — https://apis.io/providers/onechronos/  
**Documentation:** https://www.onechronos.com/documentation/fix/fix-42/us-equities/

OneChronos US Equities ATS (FIX 4.2) is one of 3 APIs that [OneChronos](https://apis.io/providers/onechronos/) publishes on the [APIs.io](https://apis.io/) network. The published artifact set on APIs.io includes API documentation and an API reference.

Order entry and execution for the OneChronos US equities dark ATS over a modern variant of the FIX 4.2 protocol. Standard and Target orders, and Expressive Bids, are submitted electronically via FIX over TCP/IP; the ATS hosts periodic auctions approximately ten times per second.

## Machine-readable artifacts (3)

- **Documentation** — https://www.onechronos.com/documentation/user-manual/us-equities/
- **APIReference** — https://www.onechronos.com/documentation/fix/fix-42/us-equities/
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/onechronos/refs/heads/main/apis.yml

## Other OneChronos APIs (2)

- [OneChronos FX Smart Market (FIX 4.2)](https://apis.io/apis/onechronos/onechronos-fx-smart-market-fix-42/)
- [OneChronos European Equities MTF (FIX 4.2)](https://apis.io/apis/onechronos/onechronos-european-equities-mtf-fix-42/)

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/onechronos/onechronos-us-equities-ats-fix-42/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/onechronos/.