Short answer
IDX — Internet Data Exchange — is the permission plus the data feed that lets you display other brokerages’ MLS listings on your own website. To get it you need three things: an active MLS membership, your broker’s written authorization, and an IDX vendor or feed your MLS has approved.
The blocker is almost never the code. It is board approval, which is measured in days to weeks, plus a recurring vendor fee — commonly $25–$100+ per month, varying widely by MLS — on top of whatever your website costs.
What IDX is, and three things it is not
The MLS is the database brokers use to cooperate and share compensation. IDX is the policy framework that lets participating brokers syndicate a filtered subset of that database out to each other’s public websites, under rules each MLS sets locally.
- IDX is not the MLS. You are not getting agent-only fields, showing instructions, or private remarks. IDX feeds are a public-facing subset.
- IDX is not the same as VOW or full API access. A Virtual Office Website has different rules and typically requires a registered consumer relationship. Full RESO Web API access is a different grant with different obligations.
- IDX is not a portal feed. What the big portals show is the result of separate syndication agreements. Having IDX does not put you on them, and being on them does not give you IDX.
The three moving parts
| Part | Who controls it | What it costs you |
|---|---|---|
| MLS membership and IDX authorization | Your local MLS or board, plus your broker | Your existing dues, sometimes a feed or setup fee; days to weeks of approval time |
| The IDX vendor or feed provider | A third-party company your MLS has approved to receive the data | Commonly $25–$100+/mo, plus a possible one-time setup fee |
| Your website | You, or whoever builds and hosts it | Integration work — anything from a paste-in embed to a full development effort |
The approval sequence, step by step
- Confirm your MLS membership is active and that you are in good standing. Nothing proceeds without it.
- Get your broker’s sign-off. IDX participation flows through the brokerage, not the individual agent. Some brokerages restrict which vendors or domains they will authorize.
- File the IDX application with your MLS or board. This typically names the exact domain the data will display on, the vendor receiving the feed, and the participant of record.
- Wait for approval. This is the unpredictable step. Some boards turn it around in a few business days; others take weeks, and some only process applications on a set schedule.
- Vendor provisioning. Once approved, the vendor is authorized to pull the feed and gives you keys, an embed, or an account.
- Integration and compliance display. Your site gets the search, and the required attribution and disclaimers go on every page showing listing data.
This is why an honest vendor separates two timelines: the website can be live quickly, and IDX activation follows board approval. Anyone quoting you “live MLS search in seven days” is quoting a timeline they do not control.
Three integration styles, and why it matters for search
Hosted or iframe search
The vendor hosts the search experience and you embed it, or you link out to a branded subdomain. Cheapest and fastest. The catch: the listing pages are not really your pages. Content inside an iframe, or on a vendor-controlled subdomain, generally does not accrue search value to your site.
JavaScript widget
The search renders inside your page via the vendor’s script. Visually better integrated, and the surrounding page is genuinely yours. The listing content itself is still injected client-side, so treat it as a conversion tool rather than an indexable asset.
Full API or RESO Web API integration
Your site consumes the feed directly and renders real pages on your own domain. This is the only version where listing pages can behave like your content — and it is the most expensive, requires the strictest compliance handling, and carries real maintenance: feeds change, fields get deprecated, and stale data violates display rules.
Does IDX actually get you leads?
This is where agents are routinely oversold, so here is the honest version.
IDX search is a conversion and retention tool far more than a traffic source. Queries like “homes for sale in Winter Park” are dominated by national portals with enormous domain authority and decades of links. A new agent site with an embedded search is not going to displace them on those terms, and no amount of listing pages changes that arithmetic quickly.
What IDX does well is keep the visitor you already earned. Someone who found you through a referral, an ad, a video, or a guide can search on your site instead of leaving for a portal — and a registration prompt turns some of that browsing into a contact. That is a real, defensible value. It is just a different value than “IDX will bring me traffic.”
If search traffic is your goal, the pages that realistically win are the ones portals do not bother writing: specific local questions, process explainers, community context, and the things you actually know. That is the case made in what AI SEO actually means for agents.
Should you buy IDX at all?
Four questions worth answering before you commit to the monthly fee:
- Do you have traffic to convert? IDX on a site with forty visitors a month is an expensive ornament. Get traffic first, then give it something to do.
- Will you follow up on registrations? Forced registration generates contacts of wildly varying quality. If nobody is calling them within minutes, the feature is generating work you will not do.
- Does your brokerage already provide it? Many do, on their own platform. It may be enough — with the caveat that you do not own that URL.
- Is your MLS’s approval timeline compatible with your launch? Ask before you promise a client or an ad campaign a date.
How we handle it
IDX is included at our Authority tier ($299/mo, with the one-time build fee waived). Practically, that means we build and launch the site on our normal timeline, and IDX activation follows your board’s approval — we cannot compress that step and we will not pretend otherwise. You supply the MLS membership, your broker’s authorization, and the credentials; we handle the application paperwork, the vendor integration, and the compliance display. There is also a monthly vendor cost that varies by MLS, and we quote it at cost rather than burying it.
If you are still comparing platforms and price bands, start with how much a realtor website costs.
SEO results depend on your market, competition, and starting point, and build over time — typically several months. We optimize continuously but do not guarantee specific search rankings or lead volume, which no ethical provider can.
Frequently asked questions
- What is IDX in real estate?
- IDX, or Internet Data Exchange, is the policy framework and data feed that lets a participating broker display other brokerages' MLS listings on their own public website. It is a filtered, public-facing subset of the MLS — not agent-only fields, and not the same as VOW or full API access.
- What do I need to get IDX on my website?
- Three things: an active MLS membership in good standing, your broker's authorization, and an IDX vendor or feed your MLS has approved. You file an application with your board naming the domain and the vendor, and the feed is provisioned only after that approval.
- How much does IDX cost per month?
- Vendor fees commonly run $25 to $100 or more per month, and some MLSs add their own feed or setup fee. These are ranges that vary widely by board and vendor, so confirm both with your MLS and the vendor before budgeting.
- How long does it take to get IDX approved?
- The technical integration is quick; board approval is the variable. Some MLSs turn applications around in a few business days and others take weeks or only process them on a set schedule. Because of that, treat website launch and IDX activation as two separate dates.
- Does IDX help my website rank in Google?
- Rarely on its own. Search results for listing queries are dominated by national portals, and iframe or JavaScript-embedded listing content generally does not accrue search value to your domain. IDX's real strength is converting and retaining visitors you already have, not attracting new ones.
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Written by Daniel Castillo, founder of ReelEstate Orlando in Orlando, Florida. Drafted with AI assistance and reviewed by a human before publication. Pricing for our own services is current as of August 6, 2026; market-wide figures are ranges that change over time. Questions? Call (407) 548-1077.