# OnTheMarket Real Time Datafeed (RTDF) API

**Canonical:** https://apis.io/apis/onthemarket/onthemarket-real-time-datafeed-api/  
**Provider:** OnTheMarket — https://apis.io/providers/onthemarket/  
**Base URL:** https://realtime-api.onthemarket.com/v1  
**Documentation:** https://expert.onthemarket.com/contact-us/

OnTheMarket Real Time Datafeed (RTDF) API is published by [OnTheMarket](https://apis.io/providers/onthemarket/) on the [APIs.io](https://apis.io/) network. Tagged areas include Data Feed, Property Listings, Leads, and Estate Agents. The published artifact set on APIs.io includes a support channel.

OnTheMarket's member-only feed API for estate-agency CRM software. It is modelled on the Rightmove Real Time Datafeed (RTDF/ADF) specification, with OnTheMarket-specific differences in request and response fields and an "Only With Us" capability for exclusive listings; overseas properties are not supported. The service host realtime-api.onthemarket.com is live and presents an OnTheMarket TLS certificate (subject O=Agents' Mutual Limited, CN=*.onthemarket.com), and the enquiry endpoint /v1/property/getbranchemails is published in third-party CRM vendor setup instructions. OnTheMarket publishes no documentation, no OpenAPI, no Swagger and no OData $metadata for it: every path on the host returns HTTP 404 with an empty body to an anonymous client, and there is no self-service signup. Access requires an existing OnTheMarket agent membership with a data feed in place, arranged through OnTheMarket support — a Rightmove-style RTDF connection using a client certificate over TLS. Listed here as a real but undocumented and member-gated surface, with no machine-readable contract available to harvest.

## Machine-readable artifacts (3)

- **Website** — https://expert.onthemarket.com/
- **Support** — https://expert.onthemarket.com/contact-us/
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/onthemarket/refs/heads/main/apis.yml

## Tags

Data Feed, Property Listings, Leads, Estate Agents

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/onthemarket/onthemarket-real-time-datafeed-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/onthemarket/.