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Start by identifying the access model
Do not treat “MLS data access” as one general permission. IDX, VOW, broker back-office, and other participant-data arrangements can differ in who may see the data, whether it can be displayed, which fields may be used, and what consumer terms apply. The agreement should name the specific model and intended audience rather than relying on a broad label such as “real-estate services.”
| Access model | What the agreement should pin down |
|---|---|
| IDX | Whether public display is authorized, which fields may appear, display and attribution rules, and applicable MLS requirements. |
| VOW | Eligibility and registration rules, consumer-facing terms, allowed data and display, and the broker’s supervision and compliance responsibilities. |
| Broker back-office or participant-data access | Who within the brokerage may access the data, which internal business functions are permitted, and whether any external delivery or display is prohibited or separately authorized. |
| Other arrangement | The precise audience, purpose, data scope, and permissions granted; do not assume rules from another access model apply. |
This comparison is a drafting checklist, not a statement that every MLS offers each model on the same terms. RESO’s Real Estate Data Sharing and Alignment guidance emphasizes completing the licensing agreement before data sharing begins. NAR’s VOW policy page identifies January 1, 2026, while the U.S. Department of Justice (DOJ) has a VOW policy document; neither should be treated as a substitute for the current rules of the particular MLS.
Agreement checklist
1. Name the parties and define the data
Identify the MLS, participant or broker, and each service provider authorized to receive or process data. Define the covered data with enough precision to administer the permission:
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- Fields, feeds, formats, and any excluded or confidential fields.
- Geographic coverage and update frequency.
- Whether the permission covers raw data, transformed data, caches, or derived information.
- What counts as “MLS data,” “authorized user,” “service provider,” “display,” and “consumer.”
Attach or identify the applicable feed specification or data dictionary, and specify how changes to it are communicated and handled.
2. Set the purpose and the limits of the license
State who may access the data, the permitted business purpose, and whether the license allows internal processing, consumer delivery, public display, or some combination. Address caching and transformation explicitly. If onward transfer, sublicensing, or use by an affiliated service is allowed, identify the conditions; otherwise, say that it is not authorized.
Do not imply that permission to process data automatically includes permission to publish it. The agreement should make the boundary between internal use and consumer-facing use understandable to the broker, vendor, and MLS.
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3. Specify display, attribution, and data integrity rules
For any authorized display, document where data may appear, any required MLS or brokerage attribution and disclaimers, refresh expectations, and when listings or fields must be removed. Clarify whether the recipient may alter, combine, annotate, or derive information from the supplied content.
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4. Put consumer terms in the right place
If consumers can access the data, specify any required registration, eligibility, and affirmative acceptance of terms before access. For VOWs, the DOJ policy describes terms addressing a lawful broker-consumer relationship, personal noncommercial use, a bona fide real-estate interest, no copying or redistribution, and acknowledgement of the MLS database’s ownership and copyright. Confirm the current local requirements and make clear whether the broker, vendor, or both must present and retain acceptance records.
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Do not automatically impose VOW-specific consumer obligations on an internal back-office tool or a different access model; use the terms required for the arrangement actually authorized.
5. Define security, privacy, and data retention
Translate security expectations into operational obligations suited to the feed and use. The agreement can specify authentication and authorization, least-privilege access, credential handling, storage safeguards, encryption where appropriate, audit logging, and controls against scraping or unauthorized reuse. Say who may access credentials and how access is removed when a user or provider no longer needs it.
Treat personal information separately from listing content. Identify what is collected, why it is needed, who can view it, how long it is retained, how it is protected, and whether it must be returned or deleted. DOJ’s VOW policy calls for reasonable efforts in that context to monitor for and prevent scraping or other unauthorized access, reproduction, or use. Local MLS rules and applicable law may add requirements.
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6. Control vendors and subcontractors
Name the vendors with access, or establish a process for MLS or broker approval before a new provider receives data. Require each provider and approved subcontractor to use the data only for the authorized service and to follow equivalent confidentiality and security obligations. Address whether a vendor may create backups, retain support logs, or use subcontractors, and set conditions for replacing or removing a provider.
Prohibit independent use of the data, including use for a vendor’s unrelated products or customers, unless the agreement expressly permits it. The NAR VOW policy and CVR MLS’s local VOW rule illustrate arrangements in which a partner operates on a participant’s behalf under the participant’s supervision and accountability. Those examples do not establish a universal rule for every MLS data arrangement, so the agreement should state the applicable responsibility directly.
7. Make audits and incident response workable
Set a process for suspected unauthorized access, disclosure, or use. Specify prompt notice, cooperation, evidence preservation, mitigation, and how response costs are allocated. Establish who coordinates communications and what information the broker, MLS, and provider must supply.
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For compliance reviews, define reasonable notice, scope, confidentiality, records to be produced, and how findings are addressed. The DOJ VOW policy provides for MLS access to a VOW for compliance verification and monitoring in that context. An agreement should implement any applicable review right without promising broader inspection access than the governing rules allow.
8. Define term, suspension, and exit
State the agreement’s duration, renewal process, and how amendments take effect. Identify suspension or termination triggers, any notice and cure period, and whether a limited wind-down is allowed. On suspension or termination, specify when feed access and credentials stop, whether the recipient must return or delete data and copies, how deletion is confirmed, and whether any narrowly defined records may be retained under applicable requirements.
RESO’s guidance expressly treats initiation, maintenance, use, and potential shutdown as matters for the licensing agreement. Exit procedures should therefore be agreed before data begins flowing, not left to an informal vendor handoff.
9. Allocate operational and legal responsibility
Address who is responsible for following MLS rules, handling data updates and errors, responding to claims, and notifying the other parties about relevant changes. The parties may also need terms on indemnification, liability limits, insurance, dispute resolution, governing law, and notices. These are negotiation points, not universal clauses: the appropriate allocation depends on the deal and requires review under the relevant law.
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10. Identify governing documents and priority
List or attach the current MLS rules, data dictionary or feed specification, security requirements, and any participant or consumer terms incorporated into the arrangement. State how updates are delivered and whether a change requires notice, acceptance, or an amendment. Establish which document controls if the MLS rules, data license, and vendor contract conflict, subject to the MLS’s own governing requirements.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Questions to resolve before signing
- Which exact access model is authorized, and is the planned audience public, registered consumers, or internal staff?
- Which fields and uses are permitted, and which are excluded?
- Can the broker’s vendor cache, transform, or pass data to a subcontractor? If so, under what controls?
- What attribution, consumer terms, refresh, and removal requirements apply to this specific use?
- Who monitors access, reports incidents, supports compliance reviews, and confirms deletion at exit?
- Which current MLS rules and state-law requirements apply, and what takes precedence if documents differ?
This is general U.S.-oriented guidance, not a conclusion about a particular MLS, state, feed, or contract. Check the current rules of the relevant MLS and applicable law before using a template. The cited national VOW policies and the CVR MLS example are useful context, not a replacement for the local agreement.
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