Trade Desk fallback requests carry scalar conversion fields.

The browser SDK uses /track/rt after a conversion transport failure. Its fallback joins pixel IDs and forwards scalar event fields, with advisory checks for values, identifiers and fallback markers.

Nested items and privacy records are omitted from this representation. Their JSON contracts stay in the separate conversion pack. Geographic region remains separate from processing-option region.

What this pack matches

Hosts: insight.adsrvr.org
Paths: /track/rt
Vendor docs: js.adsrvr.org/up_loader.1.1.0.js

Rules

Codes are stable. A finding in CI, MCP, or the playground lands on the same id.

Field	Required	What it checks	Rule ids	Source
`adv`	optional	Advertiser identity. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.adv.empty`	docs
`merchant_id`	optional	Merchant identity. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.merchant_id.empty`	docs
`pixel_ids`	recommended	The producer joins configured opaque pixel IDs with commas. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.pixel_ids.missing` `vendor.the-trade-desk-realtime-fallback.param.pixel_ids.empty`	docs
`event_name`	optional	Optional mapped event name. Presence diagnostic severity: warning. Evidence: vendor template.		docs
`value`	optional	Scalar decimal conversion value. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.value.empty` `vendor.the-trade-desk-realtime-fallback.param.value.invalid`	docs
`currency`	optional	Currency inherited from the event. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.currency.empty` `vendor.the-trade-desk-realtime-fallback.param.currency.invalid`	docs
`client_ip`	optional	Forwarded client IP. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.client_ip.empty` `vendor.the-trade-desk-realtime-fallback.param.client_ip.invalid`	docs
`adid_type`	optional	Forwarded advertising ID family. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.adid_type.empty` `vendor.the-trade-desk-realtime-fallback.param.adid_type.invalid`	docs
`adid`	optional	Advertising identity, interpreted with adid_type. Presence diagnostic severity: warning. Evidence: vendor template.		docs
`country`	optional	Country context for the region requirement. Presence diagnostic severity: warning. Evidence: vendor template.		docs
`region`	optional	Caller geographic region, separate from processing-option regions. Presence diagnostic severity: warning. Evidence: vendor template.		docs
`NielsenDMA`	optional	Forwarded numeric DMA code. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.NielsenDMA.empty` `vendor.the-trade-desk-realtime-fallback.param.NielsenDMA.invalid`	docs
`rt_fallback`	optional	The SDK marks the fallback with 1. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.rt_fallback.empty` `vendor.the-trade-desk-realtime-fallback.param.rt_fallback.invalid`	docs
`eds`	optional	Source identifiers emitted by this pinned browser producer. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.eds.empty` `vendor.the-trade-desk-realtime-fallback.param.eds.invalid`	docs
`tdid`	optional	Forwarded GUID identity. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.tdid.empty` `vendor.the-trade-desk-realtime-fallback.param.tdid.invalid`	docs
`daid`	optional	Forwarded GUID identity. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.daid.empty` `vendor.the-trade-desk-realtime-fallback.param.daid.invalid`	docs
`idfa`	optional	Forwarded GUID identity. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.idfa.empty` `vendor.the-trade-desk-realtime-fallback.param.idfa.invalid`	docs
`aaid`	optional	Forwarded GUID identity. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.aaid.empty` `vendor.the-trade-desk-realtime-fallback.param.aaid.invalid`	docs
`naid`	optional	Forwarded GUID identity. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.naid.empty` `vendor.the-trade-desk-realtime-fallback.param.naid.invalid`	docs
`idl`	optional	Forwarded 49 or 70 character RampID. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.param.idl.empty` `vendor.the-trade-desk-realtime-fallback.param.idl.invalid`	docs
`td_values…`	optional	Custom dynamic scalar fields retain the published 150 character limit. Presence diagnostic severity: warning. Evidence: vendor template. Maximum decoded characters: 150.	`vendor.the-trade-desk-realtime-fallback.param.td_values.invalid`	docs
`owner_missing`	recommended	Supply the configured advertiser or merchant identity. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.owner_missing`	docs
`purchase_value_missing`	recommended	Purchase events carry a revenue value. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.purchase_value_missing`	docs
`adid_type_missing`	recommended	Advertising identities carry their ID family. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.adid_type_missing`	docs
`us_region_missing`	recommended	United States events carry geographic region context. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.us_region_missing`	docs
`adid_tdid_invalid`	recommended	The corresponding ID family uses GUID spelling. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.adid_tdid_invalid`	docs
`adid_idfa_invalid`	recommended	The corresponding ID family uses GUID spelling. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.adid_idfa_invalid`	docs
`adid_aaid_invalid`	recommended	The corresponding ID family uses GUID spelling. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.adid_aaid_invalid`	docs
`adid_daid_invalid`	recommended	The corresponding ID family uses GUID spelling. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.adid_daid_invalid`	docs
`adid_naid_invalid`	recommended	The corresponding ID family uses GUID spelling. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.adid_naid_invalid`	docs
`method`	recommended	Pinned producer transport. Complete HTTP capture contract. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.the-trade-desk-realtime-fallback.http.method.missing` `vendor.the-trade-desk-realtime-fallback.http.method.empty` `vendor.the-trade-desk-realtime-fallback.http.method.invalid`	docs

Validate a payload

pixellint validate url "$ARTIFACT" --rulepack vendor/the-trade-desk-realtime-fallback

Try this failing payload in the playground. A Trade Desk fallback with a malformed revenue value.

https://insight.adsrvr.org/track/rt?adv=synthetic&pixel_ids=opaque&value=money

cargo install pixellint · npm install pixellint