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The RESO Web API is a standardized data access method for the real estate industry that provides a common language for software systems to exchange data. It was created to replace the older RETS standard and to modernize the way real estate data is accessed and shared. More Info on RESO Web API
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The RESO Web API Core specification outlines requirements for implementing a standardized Web API in the real estate industry to facilitate data exchange.
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The RESO Web API uses RESTful principles, JSON data format and OAuth for security.
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OAuth is used to provide secure authentication and authorization for accessing a RESO Web API service.
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The RESO Web API Developer Reference Server allows developers to access real estate listing data for testing and development purposes. The Austin Board of REALTORS® and RESO collaborate with Zillow’s Bridge Interactive API service to make this possible. Developers can access the previous year’s listing data from Austin’s Unlock MLS. It provides quick and affordable access to accurate data for developing and testing new products.
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The RESO Web API Transition Leaderboard tracks the progress of MLSs transitioning their customers’ data feeds from RETS to the RESO Web API. RETS (Real Estate Transaction Standard) is a deprecated, unsupported data transport protocol created over 20 years ago. The transition to the RESO Web API is essential, because it represents the industry’s shift towards a more modern and efficient data standard. MLSs not listed should contact RESO to be included in the leaderboard and refer to the Web API Transition Guide for advice.
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The RESO Web API Transition Guide is a roadmap for transitioning MLSs from the unsupported Real Estate Transaction Standard (RETS) to a certified RESO Web API service. This transition requires significant planning and communication, and the guide provides a path forward with advice from RESO and MLS organizations that have already converted their customers to Web API It is a best practices guide that covers preparation, communication, scheduling and execution based upon the experiences of MLS industry leaders.
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A list of vendors can be found in the appendix of the Web API Transition Guide near the end of the document.
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The RESO Web API is designed to be flexible and adaptable to different markets, including international markets with different languages. More Info on RESO Web API
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The RESO Web API Add/Edit specification standardizes the methods for adding and editing real estate data through the RESO Web API. The primary goal is to ensure consistency and interoperability when adding or updating data in different real estate systems. It provides a standardized framework for data operations, reducing errors and improving the efficiency of data management processes. More Info on Web API Add/Edit
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Validation rules are enforced to ensure data integrity and compliance with standardized definitions before data is accepted or updated.
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The Entity Events specification standardizes the way events related to data entities are handled. An entity event refers to any change or occurrence that affects an entity. Standardizing entity events ensures consistent handling, tracking, and communication of changes across different systems and platforms.
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The Webhooks Push proposal aims to standardize how webhooks are used to push data notifications from servers to clients. A webhook is an HTTP callback that allows one system to send real-time data to another system when a specific event occurs.
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The Autofill Service is designed to provide a standard method for automatically filling in forms with data stored in a user’s profile or other data sources. The Autofill Service can handle various types of data, including text, dates and structured data like addresses and payment information. By automatically filling in forms, the Autofill Service reduces the need for manual data entry, saving time and reducing errors.
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The Single Feed proposal is about supporting single feeds for data consumers, allowing them to ingest only one feed while still accessing all necessary records and fields. It addresses the challenge of data consumers having to manage multiple feeds, such as IDX and BBO, by providing a way to consolidate these into a single data feed. The single feed must include enough information to use all relevant records and fields within the varied licenses assigned to them.
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The Payloads 2.0 specification standardizes rules for the structure and format of the property records delivered via Web API services.
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The RESO Model and Field resources make server metadata easier to work with and more Data Dictionary friendly.
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The RESO LocalData field addresses the need for predictability and flexibility when handling local MLS data fields.
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The proposal for Multiple Metadata Locales accommodates internationalization and localization needs in real estate data standards. They allow real estate systems to handle metadata in various languages and regional formats.
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