SSP
OpenX
openx.com
OpenX is an independent ad exchange and sell-side platform.
Most of the 207,163 apps that declare openx.com reach it through a reseller: 99% have a RESELLER line, 35% a DIRECT one (33,913 files, 23,010 of them through taurusx.com's account). Of 952,939 lines checked against its sellers.json (7,846 sellers), 77% match, 15% name an unlisted account and 5% declare the wrong seller type. 4 sellers left its sellers.json in the last 30 days.
- Apps declaring it
- 207,163
- Sellers in sellers.json
- 7,846
- Lines verified
- 77%
- Lines with errors
- 197,936
- Avg. supply path score
- 52.4 / 100
72,237 DIRECT · 205,847 RESELLER
0% confidential
761,706 of 992,139 checked lines
992,139 lines in total
205,935 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 13 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
- 7,846
- Confidential
- 0 (0%)
- Passthrough
- 0
- Removed, last 30 days
- 4
- Last read
- Oct 13, 2026
- PUBLISHER2,099
- INTERMEDIARY5,564
- BOTH183
Cross-check of lines naming openx.com
- Verified 761,706
- Seller ID not found 149,004
- DIRECT but intermediary 18,798
- RESELLER but publisher 30,134
- Seller type BOTH 32,497
- 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
149,004 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
32,497 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
30,134 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
18,798 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 | 23,010 |
| smartadserver.com | INTERMEDIARY | 20,476 |
| algorix.co | BOTH | 20,216 |
| admanmedia.com | INTERMEDIARY | 19,864 |
| loopme.com | INTERMEDIARY | 19,363 |
| undertone.com | INTERMEDIARY | 18,484 |
| conversantmedia.com | INTERMEDIARY | 18,420 |
| outbrain.com | INTERMEDIARY | 17,316 |
Apps that declare openx.com
| App | Store | Relationship | Status |
|---|---|---|---|
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| iOS | DIRECT | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | DIRECT | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT | 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 | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | 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 7,846 sellers when we last read it on 13 October 2026: 2,099 publishers, 5,564 intermediaries and 183 listed as both; 0% are confidential.
How many apps declare OpenX in app-ads.txt?
207,163 apps in Stoqlab's data (delisted apps included) declare openx.com: 72,237 with at least one DIRECT line and 205,847 with at least one RESELLER line, across 33,913 app-ads.txt files, as of 13 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 992,139 lines naming openx.com, 197,936 contradict its sellers.json. The most common case is "Seller ID not found", on 149,004 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.