RentCast API vs Datafiniti Property Data for AI agents
RentCast API is a self-serve REST API for US property records, value and rent estimates, market data, and active sale and rental listings. Datafiniti Property Data is a searchable US property database (API, portal and bulk download) that merges listing activity, tax/assessment and transaction data per property.
The short answer
- RentCast API: The quickest self-serve way to search active US rentals and for-sale homes with agent contacts, without MLS paperwork.
- Datafiniti Property Data: Bulk property and listing-history records for analysis and modelling, billed per record returned.
Side by side
| RentCast API | Datafiniti Property Data | |
|---|---|---|
| Searches | Active sale and rental listings by city or area with filters, plus 150+ million property records, valuations and market trends. | Residential, commercial, multi-family and land properties: active listings, historical records, off-market properties, and rental status. |
| Returns | Listing records with address, coordinates, property type, beds, baths, size, price or rent, status, days on market, MLS name and number, history, and listing agent and office. | Property records with location, characteristics, tax/assessment data, transaction history, prices, rental status, brokers (agent, phones, emails) and source URLs. |
| Before the first call | A RentCast account and an API key from the dashboard; no MLS membership or license. | A Datafiniti account (trial or paid plan) and its API token. |
| Free | Developer plan: 50 API calls a month for $0. | Trial: 1,000 property records free for 2 weeks. |
| Paid | Foundation plan: $74 a month for 1,000 requests. | $119 a month for 1,000 property records a month. |
| Acting on a result | Listings include the listing agent's and listing office's name, phone, email and website; no landlord contact is described. | Records can include broker and agent names with phone numbers and emails, plus source URLs of the listing pages. |
| Limits on keeping or showing results | The API terms allow storing API data in your own systems and redistributing it only as the license section permits; no attribution is required. | No reselling or redistributing the data without significant modification, no public display of image URLs, and delete all data when the agreement ends. |
| Coverage | US nationwide; listings are gathered from public sources, not directly from MLSs. | US |
| MCP server | Official hosted MCP server: https://developers.rentcast.io/mcp | No official server listed |
Where Openpath fits
Openpath has no homes listed yet. Owners and landlords can list a home for rent or sale on Openpath today, free, and agents will find it through the same search as jobs and businesses. Get listed.
Questions people ask
What do I need before I can use RentCast API?
A RentCast account and an API key from the dashboard; no MLS membership or license.
Is RentCast API free?
Developer plan: 50 API calls a month for $0.
What do I need before I can use Datafiniti Property Data?
A Datafiniti account (trial or paid plan) and its API token.
Is Datafiniti Property Data free?
Trial: 1,000 property records free for 2 weeks.
Sources
Every line about another company comes from its own pages. Prices and terms change, so check the source before you rely on one.
RentCast API, read on October 15, 2026:
- rentcast.io/api: “Our pricing plans start with 50 free API calls per month”
- rentcast.io/api: “$ 74 Per Month”
- rentcast.io/api: “Active sale and rental listings across the country.”
- developers.rentcast.io/reference/introduction: “To get started, create a RentCast account to access your API dashboard and generate your first API key.”
- developers.rentcast.io/reference/introduction: “We have nationwide coverage for most residential properties and select commercial property types in the US”
- developers.rentcast.io/reference/property-listings: “the names and contact information of the listing agent, the listing office or broker”
- developers.rentcast.io/reference/property-listings: “we do not retrieve our property listing data directly from the MLS”
- rentcast.io/terms-api: “and (v) to incorporate and store the API Data within your internal systems”
- rentcast.io/terms-api: “neither use of the RentCast API nor use of the API Data requires attribution”
- developers.rentcast.io/reference/ai-tools: “The RentCast API MCP server is hosted at https://developers.rentcast.io/mcp.”
Datafiniti Property Data, read on October 15, 2026:
- datafiniti.co/data/property-data: “1K free property records ... for 2 weeks”
- datafiniti.co/data/property-data: “1K property records per month ... $119 per month”
- datafiniti.co/data/property-data: “Datafiniti covers residential, commercial, multi-family, land, and specialty property types throughout the U.S.”
- datafiniti.co/data/property-data: “Explore active listings, historical records, off-market properties, and inventory with no current listing activity.”
- docs.datafiniti.co/docs/property-data-schema: “A list of email addresses associated with the broker.”
- docs.datafiniti.co/docs/property-data-schema: “A list of source URLs associated with this property record.”
- datafiniti.co/terms: “Resell, redistribute or sublicensing Datafiniti Data without any significant modifications”
- datafiniti.co/terms: “you shall immediately delete all Datafiniti Data from your systems”