Ad system
pubx.ai
pubx.ai is the domain an ad system uses in app-ads.txt and ads.txt files. 31,339 apps in our data declare it. Its sellers.json lists 519 sellers.
- Apps declaring it
- 31,339
- Sellers in sellers.json
- 519
- Lines verified
- 87%
- Lines with errors
- 414
- Avg. supply path score
- 50.4 / 100
1,878 DIRECT · 31,127 RESELLER
0% confidential
2,814 of 3,228 checked lines
3,228 lines in total
30,665 apps scored
Apps and lines are recounted every 10 minutes. The sellers.json breakdown and the directory ranking are as of , recomputed daily. sellers.json last read 10 October 2026. The supply path score sums up how short and clean the declared paths are, 0 to 100 (how it is computed).
How to add pubx.ai to app-ads.txt
One line per account, in the app-ads.txt at the root of the domain your App Store and Google Play listings name as the developer website.
pubx.ai, YOUR_ACCOUNT_ID, DIRECT
pubx.ai, YOUR_ACCOUNT_ID, RESELLER
- Field 1:
pubx.ai, the domain pubx.ai uses in app-ads.txt. - Field 2: your account ID with pubx.ai. It must equal the
seller_idin pubx.ai's sellers.json. - Field 3: DIRECT if you hold the account, RESELLER if a partner holds it and sells your inventory. DIRECT vs RESELLER
- Field 4 (optional): a certification authority ID. Most lines naming pubx.ai carry none, or different ones, so we do not suggest one.
sellers.json at a glance
- Status
- Published
- Sellers listed
- 519
- Confidential
- 0 (0%)
- Passthrough
- 0
- Removed, last 30 days
- 0
- Last read
- Oct 10, 2026
- PUBLISHER511
- INTERMEDIARY3
- BOTH5
Cross-check of lines naming pubx.ai
- Verified 2,814
- Seller ID not found 264
- DIRECT but intermediary 0
- RESELLER but publisher 150
- Seller type BOTH 0
- Confidential seller 0
- No sellers.json 0
- Unchecked 0
Every line naming pubx.ai is looked up in its sellers.json. What each status means
Common errors with pubx.ai lines
-
Seller ID not found
264 lines
Ask pubx.ai for the account ID it lists for you in its sellers.json, correct the line, or remove it if you no longer work with them. Buyers that check sellers.json drop these paths.
-
RESELLER but publisher
150 lines
If the account is yours, declare it DIRECT. If a partner holds it, ask pubx.ai why the account is listed as PUBLISHER.
Intermediaries most declared as RESELLER
Accounts on pubx.ai that its sellers.json lists as INTERMEDIARY or BOTH, by the number of app-ads.txt files declaring them. Confidential sellers are left out.
| Seller domain | Type | Files |
|---|---|---|
| bidmachine.io | INTERMEDIARY | 2,622 |
Apps that declare pubx.ai
| App | Store | Relationship | Status |
|---|---|---|---|
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live |
Questions about pubx.ai
How do I add pubx.ai to app-ads.txt?
Add one line for each account pubx.ai gives you: "pubx.ai, YOUR_ACCOUNT_ID, DIRECT". Use DIRECT when you hold the account yourself and RESELLER when a partner holds it and sells your inventory through pubx.ai. The account ID must be the seller_id pubx.ai lists for you in its sellers.json; pubx.ai will give it to you. Put the file at the root of the domain named as your developer website in the App Store and Google Play listings.
Does pubx.ai publish a sellers.json?
Yes. Its file at https://cdn.pubx.ai/sellers.json listed 519 sellers when we last read it on 10 October 2026: 511 publishers, 3 intermediaries and 5 listed as both; 0% are confidential.
How many apps declare pubx.ai in app-ads.txt?
31,339 apps in Stoqlab's data (delisted apps included) declare pubx.ai: 1,878 with at least one DIRECT line and 31,127 with at least one RESELLER line, across 2,814 app-ads.txt files. Counts are recomputed daily.
Why do pubx.ai lines fail verification?
Of 3,228 lines naming pubx.ai, 414 contradict its sellers.json. The most common case is "Seller ID not found" (264 lines): Ask pubx.ai for the account ID it lists for you in its sellers.json, correct the line, or remove it if you no longer work with them. Buyers that check sellers.json drop these paths.
What is the difference between DIRECT and RESELLER?
DIRECT means the publisher owns the account; RESELLER means an intermediary sells the inventory on the publisher's behalf. DIRECT lines should match a PUBLISHER entry in the network's sellers.json, RESELLER lines an INTERMEDIARY entry.
Sources: the public app-ads.txt files of tracked apps and the sellers.json of pubx.ai. Something wrong? Tell us.