HARMLS IDX Websites for Houston REALTORS® & Brokers
Beautiful, semi-custom REALTOR® websites with live HARMLS listings, built for agents and brokers across Greater Houston.
18+ Cities Across Houston Covered
Approved HARMLS Vendor
Listings Updated Every 10 Minutes
How Your HARMLS IDX Website Works
HARMLS supports more than 48,000 real estate professionals across Greater Houston. Your website pulls live, direct listing data straight from your HARMLS feed – not scraped or delayed data from a third party. Behind every HARMLS-connected site is the same platform powering OSI IDX’s REALTOR® websites across the country — flat pricing, semi-custom design, and no CRM lock-in.
Trusted by 1,000+ REALTORS® & Brokers
Why Agents Choose OSI IDX
A direct HARMLS feed is only part of the equation. Here’s what sets an OSI IDX website apart from other HARMLS IDX vendors:
- One flat price, everything included. Your website, hosting, and HARMLS feed are bundled into a single monthly cost – no surprise upgrades or hidden tiers.
- Bring your own CRM. There’s no requirement to switch systems. Leads flow straight into whatever CRM you’re already using.
- A site that looks like yours, not a template. Every website is semi-custom, built around your brand rather than pulled from a shared design pool.
- Over 40 years in real estate technology. OSI IDX comes from OSI Express, a family-owned company that’s been building real estate tools since 1982.
- Support from actual people, based in the US. No offshore contractors, no AI chat window standing in for a human.
Frequently Asked Questions
Is OSI IDX an approved HARMLS vendor?
Yes. OSI IDX is an approved vendor for the HARMLS IDX feed, giving your website direct, authorized access to live HARMLS listings.
What cities does HARMLS cover?
HARMLS covers cities and markets throughout Greater Houston and Southeast Texas, including Houston, Katy, Conroe, Spring, Richmond, Humble, Cypress, Montgomery, Galveston, Tomball, Baytown, Magnolia, Sugar Land, Cleveland, Huntsville, The Woodlands, Willis, and Missouri City.
How often are HARMLS listings updated on my website?
Listings on your website are updated every 10 minutes, so your site always reflects current HARMLS MLS data.
Is there an extra fee for the HARMLS IDX feed?
OSI IDX charges a flat $25/month for each MLS IDX feed.
Can I include other MLS’s on my website?
Yes. You can include multiple MLS IDX feeds on your website. You must be a member of the MLS and each MLS feed is a flat $25/month. When including multiple MLS IDX feeds, all data is seamlessly integrated with your website’s search functions, featured listings, homepage custom property scrolls and more.
How long does it take to launch an OSI IDX website?
Most OSI IDX websites launch within 5-7 business days of receiving your content and branding preferences. Your HARMLS IDX feed is connected as part of setup, so live MLS listings are ready from day one.
Can I switch to OSI IDX from another HARMLS IDX provider?
Yes. We will build your real estate website on a staging domain so you can see it before you go live. Your branding, featured listings and searchable MLS data from HARMLS IDX feed will already be setup. Then, we will go live with your domain without disruption to your online presence.
HARMLS Coverage
HARMLS is operated by Houston REALTORS® Information Service (HRIS), a wholly-owned subsidiary of the Houston Association of REALTORS® (HAR), which was founded in 1918. HAR is the largest individual dues-paying membership trade association in Houston and the second-largest local REALTOR® association in the United States. Cities and markets covered include Houston, Katy, Conroe, Spring, Richmond, Humble, Cypress, Montgomery, Galveston, Tomball, Baytown, Magnolia, Sugar Land, Cleveland, Huntsville, The Woodlands, Willis, and Missouri City.
Here are the cities and markets HARMLS covers:
- Houston
- Katy
- Conroe
- Spring
- Richmond
- Humble
- Cypress
- Montgomery
- Galveston
- Tomball
- Baytown
- Magnolia
- Sugar Land
- Cleveland
- Huntsville
- The Woodlands
- Willis
- Missouri City
Join Houston agents who’ve made the switch to a faster, better HARMLS IDX REALTOR® website. See what’s included
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