24% of ads.txt entries fail sellers.json verification. Verified supply earns up to 6x the CPM. We cross-reference 220K+ domains against 2,000+ SSPs so you see exactly what DSPs see.
Tracking sellers.json from
The verification gap
DSPs verify every supply path before bidding. If your ads.txt entries don't match sellers.json records, they skip your inventory. No error message. No notification. CPMs just drift down.
An SSP quietly changes their sellers.json. Your verified path disappears overnight. Bids stop flowing. Revenue drops. You never find out why because nothing in your dashboard shows it.
This is happening right now across 24% of the supply chain. The only question is whether it's happening to you.
How silent revenue loss works
SSP changes sellers.json without telling you
Your ads.txt entry can no longer be verified
DSPs silently skip your inventory on that path
Revenue drops. Nothing in your dashboard explains it.
Source: Index Exchange Research
Free tools check formatting. BeamFlow verifies every line against 2,000+ live sellers.json files. That's the difference DSPs care about.
What BeamFlow does
Not a one-time scan. Continuous supply chain monitoring that catches changes before they cost you.
Every ads.txt line cross-referenced against 2,000+ sellers.json files. Every seller ID matched. Every relationship confirmed. You see exactly what DSPs see.
SSP changes sellers.json? You know within hours, not weeks. New errors in your ads.txt? Alerted before DSPs act on them. Unauthorized seller appears? Flagged immediately.
SSP sends 80 new lines? Paste them in. Instant dedup, syntax check, sellers.json verification. Version history and rollback. Your team's single source of truth.
Real verification
Most tools check if your ads.txt file is formatted correctly. That's table stakes. BeamFlow verifies every line against the actual sellers.json files of 2,000+ SSPs. We confirm the seller ID exists, the relationship type matches, and the authorization is current.
The result: you see exactly what DSPs see when they evaluate your supply chain. If a path won't pass SPO verification, you know before they do.
Two products. One supply chain.
Publishers lose CPMs from unverified ads.txt entries. SSPs lose buyers from messy sellers.json. Both problems start with the same thing: no visibility.
“My CPMs are down and I can't figure out why.”
DSPs verify your ads.txt against sellers.json before bidding. If it doesn't match, they skip you silently. We show you exactly which lines fail, alert you when SSPs change your status, and give your team tools to keep ads.txt verified.
“Buyers are cutting SSPs from their SPO short list. Are we next?”
DSPs are consolidating to fewer, cleaner supply paths. A messy sellers.json means lost bids. We audit yours against 220K+ publisher ads.txt records and show where verification fails before buyers notice.
How it works
Type your domain. No signup, no credit card. Results in under 60 seconds.
Instant verification against 60M+ lines and 2,000+ SSPs. Every entry checked, color-coded, scored.
Fix issues, then get daily monitoring and alerts when SSPs change. Your ads.txt stays verified.
Built by an ad ops veteran who spent 15 years managing ads.txt with spreadsheets and email chains, watching publishers lose revenue to problems nobody could see. BeamFlow started as a personal tool to automate what shouldn't be manual. Now it monitors the entire programmatic ecosystem.
220K+ domains. 60M+ lines. 2,000+ sellers.json. Approaching full coverage.
Simple pricing
The free scan shows you every problem in your ads.txt. Starter gives you the full report, daily monitoring, alerts, and tools to keep it clean.
Free
See the problems
Fix and stay fixed
Most publishers recover more than $49/mo in their first scan. Recovering just 5% of lost revenue from unverified paths pays for the tool many times over.
Also available: SSP Intelligence ($499/mo) and Enterprise plans.
BeamFlow monitors the programmatic supply chain. We cross-reference your ads.txt against 2,000+ SSP sellers.json files (for publishers) or your sellers.json against 220K+ publisher ads.txt records (for SSPs). We monitor continuously and alert you when things change.
The free scan gives you your health score and full file with color-coded status per line: green (verified), red (unverified), yellow (warning). You see which lines have problems but not why or how to fix them. Starter ($49/mo) unlocks the full detailed report, sellers.json verification, monitoring alerts, ads.txt management, and up to 5 domains.
Supply Path Optimization is how DSPs choose which supply paths to use and which to block. They verify every path against ads.txt and sellers.json. If your entries don't match, your inventory gets skipped silently. Verified supply earns up to 6x higher CPMs.
Constantly. SSPs update sellers.json, publishers modify ads.txt, new relationships form, old ones break. That's why continuous monitoring matters more than one-time scans. Our alerts catch changes within hours, not weeks.
Yes. Our SSP Intelligence plan ($499/mo) includes sellers.json health audit, publisher verification across 220K+ ads.txt records, competitive intelligence (adoption count, lost/gained publishers, competitor comparison), and monitoring alerts.
A single scan shows today's problems. But SSPs change sellers.json daily. Publishers modify ads.txt. New errors appear. Without monitoring, you're fixing yesterday's issues while new ones accumulate. Monitoring catches changes before they cost you revenue.
We only analyze publicly available ads.txt and sellers.json files. These are the same files DSPs and buyers already access. Your analysis results are private to your account.
Still have questions? Get in touch
Find out what's verified and what's costing you revenue. Free. Under 60 seconds.
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