SSP
OpenX
openx.com
OpenX is an independent ad exchange and sell-side platform.
Most of the 220,829 apps that declare openx.com reach it through a reseller: 99% have a RESELLER line, 35% a DIRECT one (35,859 files, 24,413 of them through taurusx.com's account). Of 1,004,550 lines checked against its sellers.json (7,857 sellers), 77% match, 15% name an unlisted account and 4.9% declare the wrong seller type. 4 sellers left its sellers.json in the last 30 days.
- Apps declaring it
- 220,829
- Sellers in sellers.json
- 7,857
- Lines verified
- 77%
- Lines with errors
- 202,409
- Avg. supply path score
- 52.5 / 100
76,212 DIRECT · 219,415 RESELLER
0% confidential
779,954 of 1,015,549 checked lines
1,015,549 lines in total
217,077 apps scored
App counts, the sellers.json breakdown and the directory ranking are as of , recomputed daily (the same numbers as the directory). Line counts are recounted every 10 minutes. sellers.json last read 14 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 OpenX 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.
openx.com, YOUR_ACCOUNT_ID, DIRECT, 6a698e2ec38604c6
openx.com, YOUR_ACCOUNT_ID, RESELLER, 6a698e2ec38604c6- Field 1:
openx.com, the domain OpenX uses in app-ads.txt. - Field 2: your account ID with OpenX. It must equal the
seller_idin OpenX'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):
6a698e2ec38604c6, the certification authority ID on 97% of the lines naming openx.com.
sellers.json at a glance
- Status
- Published
- Sellers listed
- 7,857
- Confidential
- 0 (0%)
- Passthrough
- 0
- Removed, last 30 days
- 4
- Last read
- Oct 14, 2026
- PUBLISHER2,096
- INTERMEDIARY5,578
- BOTH183
Cross-check of lines naming openx.com
- Verified 779,954
- Seller ID not found 152,433
- DIRECT but intermediary 19,121
- RESELLER but publisher 30,855
- Seller type BOTH 33,186
- Confidential seller 0
- No sellers.json 0
- Unchecked 0
Every line naming openx.com is looked up in its sellers.json. What each status means
Common errors with openx.com lines
-
Seller ID not found
152,433 lines
Ask OpenX 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.
-
Seller type BOTH
33,186 lines
The account is listed as BOTH, so sellers.json alone cannot tell a buyer which relationship applies. Nothing to fix on your side; buyers usually look at the seller's domain.
-
RESELLER but publisher
30,855 lines
If the account is yours, declare it DIRECT. If a partner holds it, ask OpenX why the account is listed as PUBLISHER.
-
DIRECT but intermediary
19,121 lines
If a partner holds this account and resells your inventory, the line should say RESELLER. If the account is yours, ask OpenX to list it as PUBLISHER.
Intermediaries most declared as RESELLER
Accounts on openx.com 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 |
|---|---|---|
| taurusx.com | INTERMEDIARY | 24,413 |
| smartadserver.com | INTERMEDIARY | 21,687 |
| algorix.co | BOTH | 21,414 |
| admanmedia.com | INTERMEDIARY | 21,044 |
| loopme.com | INTERMEDIARY | 20,540 |
| conversantmedia.com | INTERMEDIARY | 19,555 |
| undertone.com | INTERMEDIARY | 19,451 |
| outbrain.com | INTERMEDIARY | 18,309 |
Apps that declare openx.com
| App | Store | Relationship | Status |
|---|---|---|---|
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live |
Questions about OpenX
Does OpenX publish a sellers.json?
Yes. Its file at https://assets.openx.com/sellers.json listed 7,857 sellers when we last read it on 14 October 2026: 2,096 publishers, 5,578 intermediaries and 183 listed as both; 0% are confidential.
How many apps declare OpenX in app-ads.txt?
220,829 apps in Stoqlab's data (delisted apps included) declare openx.com: 76,212 with at least one DIRECT line and 219,415 with at least one RESELLER line, across 35,859 app-ads.txt files, as of 14 October 2026 (recounted daily).
What is the certification authority ID for OpenX?
97% of the app-ads.txt lines naming openx.com carry "6a698e2ec38604c6" in the fourth field. The field is optional; the IAB Tech Lab ads.txt 1.1 specification says identifiers in sellers.json supersede it, so a missing or different value does not make a line invalid.
Why do openx.com lines fail verification?
Of 1,015,549 lines naming openx.com, 202,409 contradict its sellers.json. The most common case is "Seller ID not found", on 152,433 lines. Ask OpenX 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.
Not sure whether your line should say DIRECT or RESELLER? DIRECT vs RESELLER in app-ads.txt
Sources: the public app-ads.txt files of tracked apps and the sellers.json of openx.com. Something wrong? Tell us.