SimplyRETS vs Realie Property Data API for AI agents
SimplyRETS is a developer API and WordPress plugin that turns your own MLS's RETS or RESO Web API feed into a simple REST listings API. Realie Property Data API is a US property data API (REST, CLI and MCP) for parcel lookup, property search, owners and comparables; its docs describe property records, not MLS listings.
The short answer
- SimplyRETS: An affordable, simple REST layer for an agent or brokerage that already has its own MLS data feed.
- Realie Property Data API: Cheap, agent-friendly lookups of US parcel and owner records, not finding homes for sale or rent.
Side by side
| SimplyRETS | Realie Property Data API | |
|---|---|---|
| Searches | Listings from the MLS feeds you connect: active, under contract, pending and closed; residential, condo, rental, multifamily, commercial and land, plus open houses. | Properties and parcels by address, parcel ID, location or whole areas such as counties. |
| Returns | Listing records with property details, photos, and listing agent and office information when the MLS feed supplies it. | Property and parcel records with owner details and comparables. |
| Before the first call | RETS or RESO Web API credentials from your MLS; whether you must be an agent or broker depends on the MLS. | A Realie account, an API key from the dashboard, and a payment method on file before sending API requests. |
| Free | Free demo API keys with sample data; no free trial with live data. | Free plan: $0 a month with 25 tokens a month. |
| Paid | Basic plan $49 a month, plus a one-time $99 fee per MLS connection. | Tier 1: $50 a month for 1,250 tokens. |
| Acting on a result | Listing agent and office contact details come with each listing when the MLS feed has them, and some MLSs require showing them. | Nothing: no agent or landlord contact is described (it has owner tools, not listing contacts). |
| Limits on keeping or showing results | Only listings flagged for IDX display are served, and you must follow the display rules (e.g. last-updated disclaimers) set by your MLS. | Not stated on its pages |
| Coverage | Whatever MLS you connect (US); no fixed national coverage. | US nationwide property data. |
| MCP server | No official server listed | Official MCP server: https://app.realie.ai/api/mcp (OAuth sign-in) |
Where AgentBeacon fits
AgentBeacon has no home beacons yet. Anyone can create one, and agents will find them through the same search as jobs and businesses.
Questions people ask
What do I need before I can use SimplyRETS?
RETS or RESO Web API credentials from your MLS; whether you must be an agent or broker depends on the MLS.
Is SimplyRETS free?
Free demo API keys with sample data; no free trial with live data.
What do I need before I can use Realie Property Data API?
A Realie account, an API key from the dashboard, and a payment method on file before sending API requests.
Is Realie Property Data API free?
Free plan: $0 a month with 25 tokens a month.
Sources
Every line about another company comes from its own pages. Prices and terms change, so check the source before you rely on one.
SimplyRETS, read on October 15, 2026:
- simplyrets.com: “These are our demo API keys, you can use them!”
- simplyrets.com: “Each RETS or RESO Web API connection requires one time $99 connection fee.”
- simplyrets.com: “Get RETS or RESO Web API credentials from your MLS”
- simplyrets.com/faq: “This is dependent on the MLS area you want to connect to.”
- docs.simplyrets.com/topics/fields-and-features-for-idx-compliance: “In some cases it may be required that you show the contact information for the listing agent and/or listing office.”
- docs.simplyrets.com/topics/fields-and-features-for-idx-compliance: “in many areas it’s required to show the timestamp of when the data was last updated in a disclaimer.”
- simplyrets.com: “Basic $ 49 /mo”
- simplyrets.com/faq: “We don't currently offer a free trial period with live data”
Realie Property Data API, read on October 15, 2026:
- docs.realie.ai/api-reference/pricing: “$0 / Month ... 25 Tokens / Month”
- docs.realie.ai/api-reference/pricing: “$50 / Month ... 1,250 Tokens / Month”
- docs.realie.ai/api-reference/faq: “Add a payment method from Billing before sending API requests.”
- docs.realie.ai: “accessing nationwide property data programmatically”
- docs.realie.ai/api-reference/property-data: “A flexible way to paginate through large areas (such as entire counties) to collect all relevant data.”
- docs.realie.ai/realie-mcp-server: “https://app.realie.ai/api/mcp”