SSP and exchange
Xandr (Microsoft)
xandr.com
xandr.com is a domain of Xandr, now part of Microsoft Advertising. Many files declare the same exchange under appnexus.com.
Most of the 204,680 apps that declare xandr.com reach it through a reseller: 100% have a RESELLER line, 10% a DIRECT one (32,672 files, 26,490 of them through LoopMe's account). 27% of the 437,623 lines checked name an account its sellers.json (1,485 sellers) does not list. 25 sellers left its sellers.json in the last 30 days.
- Apps declaring it
- 204,680
- Sellers in sellers.json
- 1,485
- Lines verified
- 38%
- Lines with errors
- 129,754
- Avg. supply path score
- 52.2 / 100
20,403 DIRECT · 203,681 RESELLER
0.9% confidential
167,795 of 439,190 checked lines
439,190 lines in total
201,232 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 Xandr (Microsoft) 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.
xandr.com, YOUR_ACCOUNT_ID, DIRECT, f5ab79cb980f11d1
xandr.com, YOUR_ACCOUNT_ID, RESELLER, f5ab79cb980f11d1- Field 1:
xandr.com, the domain Xandr (Microsoft) uses in app-ads.txt. - Field 2: your account ID with Xandr (Microsoft). It must equal the
seller_idin Xandr (Microsoft)'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):
f5ab79cb980f11d1, the certification authority ID on 52% of the lines naming xandr.com.
sellers.json at a glance
- Status
- Published
- Sellers listed
- 1,485
- Confidential
- 13 (0.9%)
- Passthrough
- 0
- Removed, last 30 days
- 25
- Last read
- Oct 13, 2026
- PUBLISHER939
- INTERMEDIARY325
- BOTH221
Cross-check of lines naming xandr.com
- Verified 167,795
- Seller ID not found 120,337
- DIRECT but intermediary 1,287
- RESELLER but publisher 8,130
- Seller type BOTH 141,641
- Confidential seller 0
- No sellers.json 0
- Unchecked 0
Every line naming xandr.com is looked up in its sellers.json. What each status means
Common errors with xandr.com lines
-
Seller type BOTH
141,641 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.
-
Seller ID not found
120,337 lines
Ask Xandr (Microsoft) 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
8,130 lines
If the account is yours, declare it DIRECT. If a partner holds it, ask Xandr (Microsoft) why the account is listed as PUBLISHER.
-
DIRECT but intermediary
1,287 lines
If a partner holds this account and resells your inventory, the line should say RESELLER. If the account is yours, ask Xandr (Microsoft) to list it as PUBLISHER.
Intermediaries most declared as RESELLER
Accounts on xandr.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 |
|---|---|---|
| loopme.com | INTERMEDIARY | 26,490 |
| risecodes.com | BOTH | 17,950 |
| algorix.co | INTERMEDIARY | 17,144 |
| bidmachine.io | INTERMEDIARY | 16,992 |
| thunder-monetize.com | BOTH | 16,158 |
| unity.com | BOTH | 15,185 |
| connekt.ai | INTERMEDIARY | 12,957 |
| voisetech.com | INTERMEDIARY | 12,337 |
Apps that declare xandr.com
| App | Store | Relationship | Status |
|---|---|---|---|
| iOS | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live | |
| iOS | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live |
Questions about Xandr (Microsoft)
Does Xandr (Microsoft) publish a sellers.json?
Yes. Its file at https://acdn.adnxs.com/sellers/1d/appnexus/sellers.json listed 1,485 sellers when we last read it on 13 October 2026: 939 publishers, 325 intermediaries and 221 listed as both; 0.9% are confidential.
How many apps declare Xandr (Microsoft) in app-ads.txt?
204,680 apps in Stoqlab's data (delisted apps included) declare xandr.com: 20,403 with at least one DIRECT line and 203,681 with at least one RESELLER line, across 32,672 app-ads.txt files, as of 14 October 2026 (recounted daily).
What is the certification authority ID for Xandr (Microsoft)?
52% of the app-ads.txt lines naming xandr.com carry "f5ab79cb980f11d1" 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 xandr.com lines fail verification?
Of 439,190 lines naming xandr.com, 129,754 contradict its sellers.json. The most common case is "Seller ID not found", on 120,337 lines. Ask Xandr (Microsoft) 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 xandr.com. Something wrong? Tell us.