# Trestle RETS

**Canonical:** https://apis.io/apis/trestle/trestle-rets/  
**Provider:** Trestle — https://apis.io/providers/trestle/  
**Base URL:** https://api.cotality.com/trestle/rets  
**Documentation:** https://trestle-documentation.corelogic.com/rets.html

Trestle RETS is one of 4 APIs that [Trestle](https://apis.io/providers/trestle/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include RETS, Legacy, MLS, and Real-Estate. The published artifact set on APIs.io includes API documentation.

Trestle's legacy Real Estate Transaction Standard interface, documented as compliant with RETS 1.8. RESO no longer updates the RETS specification, but Trestle continues to serve it for customers who cannot move to the Web API. Login is POST /trestle/rets/login; the service is session-less and supports either HTTP Basic with a Base64-encoded client_id:client_secret or an OAuth2 bearer token obtained with scope=rets. Digest authentication is explicitly not supported.

## Machine-readable artifacts (3)

- **Documentation** — https://trestle-documentation.corelogic.com/rets.html
- **Documentation** — https://trestle-documentation.corelogic.com/rets-libraries.html
- **Documentation** — https://trestle-documentation.corelogic.com/rets-connector.html

## Other Trestle APIs (3)

- [Trestle RESO Web API](https://apis.io/apis/trestle/trestle-reso-web-api/)
- [Trestle Direct Web API](https://apis.io/apis/trestle/trestle-direct-web-api/)
- [Trestle Participant Reporting API](https://apis.io/apis/trestle/trestle-participant-reporting-api/)

## Tags

RETS, Legacy, MLS, Real-Estate

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