Tideline Data builds MLS data systems: RESO Web API integration, listing replication, and compliant IDX display platforms for brokerages and real estate technology products.
We build for the full lifecycle of licensed listing data, from the master license agreement to the pixel on the page.
Integration with MLS Grid's RESO Web API, designed around master data license agreements. Broker and subscriber licensing workflows are built so data access stays clean, documented, and auditable.
Listing and media replication to our own cloud infrastructure, built to sync on a 15-minute cadence. Field-level normalization to the RESO Data Dictionary, with full change history.
IDX search, property pages, and building-level data products engineered to MLS display rules: required disclaimers, brokerage attribution, and field-use scope built in, not bolted on.
Listing data is licensed, not scraped. Every system we build is engineered against the governing rule sets from day one.
Display requirements, attribution, and disclaimer placement built to the current MLS Grid IDX rule set.
Scope-limited use of NWMLS data under the current compliance policy, with internal audit checklists per release.
Data Dictionary-compliant field mapping across replication, storage, and display layers.
Copyright notices are reviewed and forwarded promptly. Send DMCA notices to legal@tidelinedata.com.
The tideline is the surveyed boundary where water meets land, the original property datum in a waterfront market. It is a fitting name for a company whose work is the precise, licensed boundary between MLS systems and the products built on them.
Tideline Data is a Pacific Northwest real estate data systems company based in Kirkland, Washington. We build for brokerages and real estate technology platforms operating in Northwest MLS markets, with infrastructure designed for accuracy, auditability, and rule-compliant display.
Licensing, integration, or display compliance questions. We respond within one business day.