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.
- Apps declaring it
- 153,705
- Sellers in sellers.json
- 1,492
- Lines verified
- 38%
- Lines with errors
- 93,574
- Avg. supply path score
- 52.1 / 100
16,322 DIRECT · 152,929 RESELLER
0.8% confidential
119,457 of 314,208 checked lines
314,208 lines in total
152,154 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 9 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 53% of the lines naming xandr.com.
sellers.json at a glance
- Status
- Published
- Sellers listed
- 1,492
- Confidential
- 12 (0.8%)
- Passthrough
- 0
- Removed, last 30 days
- 12
- Last read
- Oct 9, 2026
- PUBLISHER945
- INTERMEDIARY326
- BOTH221
Cross-check of lines naming xandr.com
- Verified 119,457
- Seller ID not found 86,795
- DIRECT but intermediary 934
- RESELLER but publisher 5,845
- Seller type BOTH 101,177
- 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
101,177 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
86,795 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
5,845 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
934 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 | 17,631 |
| risecodes.com | BOTH | 12,094 |
| algorix.co | INTERMEDIARY | 11,683 |
| bidmachine.io | INTERMEDIARY | 11,459 |
| thunder-monetize.com | BOTH | 11,015 |
| unity.com | BOTH | 10,369 |
| connekt.ai | INTERMEDIARY | 8,929 |
| voisetech.com | INTERMEDIARY | 8,351 |
Apps that declare xandr.com
| App | Store | Relationship | Status |
|---|---|---|---|
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | 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 | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | DIRECT + RESELLER | Live |
Questions about Xandr (Microsoft)
How do I add Xandr (Microsoft) to app-ads.txt?
Add one line for each account Xandr (Microsoft) gives you: "xandr.com, YOUR_ACCOUNT_ID, DIRECT, f5ab79cb980f11d1". Use DIRECT when you hold the account yourself and RESELLER when a partner holds it and sells your inventory through xandr.com. The account ID must be the seller_id Xandr (Microsoft) lists for you in its sellers.json; Xandr (Microsoft) 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 Xandr (Microsoft) publish a sellers.json?
Yes. Its file at https://acdn.adnxs.com/sellers/1d/appnexus/sellers.json listed 1,492 sellers when we last read it on 9 October 2026: 945 publishers, 326 intermediaries and 221 listed as both; 0.8% are confidential.
How many apps declare Xandr (Microsoft) in app-ads.txt?
153,705 apps in Stoqlab's data (delisted apps included) declare xandr.com: 16,322 with at least one DIRECT line and 152,929 with at least one RESELLER line, across 22,684 app-ads.txt files. Counts are recomputed daily.
What is the certification authority ID for Xandr (Microsoft)?
53% 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 314,208 lines naming xandr.com, 93,574 contradict its sellers.json. The most common case is "Seller ID not found" (86,795 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.
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 xandr.com. Something wrong? Tell us.