openrtb.2.5.bid.response_urls

What it means

OpenRTB 2.5 introduced bid.burl, bid.lurl, bid.tactic, bid.language, bid.wratio, bid.hratio, which openRTB 2.5 expanded bid response notice URLs and creative metadata fields..

Why it matters

bid.burl is only defined from 2.5 onward. Used against an earlier version it is not valid, and a consumer below 2.5 treats it as an unknown field.

How to fix it

Target OpenRTB 2.5 or later when you send bid.burl, and make sure the value matches the type and any enum the specification defines for it.

Paste your bid request into the tester and select OpenRTB 2.5 to see whether this rule fires against your payload.

Reference

• Specification section: Section 4.2.3
• Source: OpenRTB 2.6 Appendix B: Version 2.4 to 2.5

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