RESO Web API integration for MLS data and existing applications.

I implement and repair RESO Web API connections for property applications. The work covers authentication, field mapping, replication, media, and keeping local records aligned with the provider. You supply the required MLS access and licensing.

Describe your RESO integration

What is the RESO Web API?

The RESO Web API is a standards-based way for authorized applications to access real estate data. The standard helps with consistency, but available fields, permissions, and update behavior still depend on the provider. See the RESO Web API overview for the standard itself.

Integration work I can help with

A new provider connection or RETS migration.
Authentication and token handling.
Metadata inspection and field mapping.
Property, member, office, and media data.
Pagination, incremental updates, and local storage.
Repairing a feed that misses changes or creates duplicates.

Keep provider differences explicit

Resource availability, enumerations, timestamps, and media rules can vary. The integration should inspect metadata and follow the provider’s documentation. A mapping layer makes those differences easier to test and maintain.

Replication needs a recovery plan

A local data copy needs a reliable update watermark, consistent pagination, and a way to restart after a failed request. It also needs an approach to records that change status, disappear, or are deleted.

I check record counts, update windows, and representative listings so a job that completes without errors does not hide missing data. Logs should show where the sync stopped and what needs attention.

Media and listing changes

Images can have different update, access, and caching behavior from listing records. The application needs to distinguish provider references from locally stored media and follow the applicable use and retention rules.

Live queries or a local database?

The decision depends on provider limits, licensing, search requirements, update frequency, and resilience. A local copy may support more flexible search, but it adds responsibility for synchronization and stale records.

Connecting data to the rest of the platform

I can connect the feed to property search, lead capture, CRM workflows, and existing PHP applications. See real estate application development for the wider platform work.

Can one application use several providers?

Yes, if access and licensing allow it. The architecture should normalize the data the application needs while keeping provider-specific behavior separate.