Ad system
castify.ai
castify.ai is the domain an ad system uses in app-ads.txt and ads.txt files. 105,328 apps in our data declare it. Its sellers.json lists 336 sellers.
- Apps declaring it
- 105,328
- Sellers in sellers.json
- 336
- Lines verified
- 73%
- Lines with errors
- 10,547
- Avg. supply path score
- 50.4 / 100
20,284 DIRECT · 105,182 RESELLER
0% confidential
28,740 of 39,291 checked lines
39,291 lines in total
103,707 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 castify.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.
castify.ai, YOUR_ACCOUNT_ID, DIRECT
castify.ai, YOUR_ACCOUNT_ID, RESELLER- Field 1:
castify.ai, the domain castify.ai uses in app-ads.txt. - Field 2: your account ID with castify.ai. It must equal the
seller_idin castify.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 castify.ai carry none, or different ones, so we do not suggest one.
sellers.json at a glance
- Status
- Published
- Sellers listed
- 336
- Confidential
- 0 (0%)
- Passthrough
- 0
- Removed, last 30 days
- 0
- Last read
- Oct 9, 2026
- PUBLISHER309
- INTERMEDIARY22
- BOTH5
Cross-check of lines naming castify.ai
- Verified 28,740
- Seller ID not found 9,239
- DIRECT but intermediary 1,260
- RESELLER but publisher 48
- Seller type BOTH 4
- Confidential seller 0
- No sellers.json 0
- Unchecked 0
Every line naming castify.ai is looked up in its sellers.json. What each status means
Common errors with castify.ai lines
-
Seller ID not found
9,239 lines
Ask castify.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.
-
DIRECT but intermediary
1,260 lines
If a partner holds this account and resells your inventory, the line should say RESELLER. If the account is yours, ask castify.ai to list it as PUBLISHER.
-
RESELLER but publisher
48 lines
If the account is yours, declare it DIRECT. If a partner holds it, ask castify.ai why the account is listed as PUBLISHER.
-
Seller type BOTH
4 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.
Intermediaries most declared as RESELLER
Accounts on castify.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 |
|---|---|---|
| inmobi.com | INTERMEDIARY | 7,250 |
| fyber.com | INTERMEDIARY | 5,315 |
| unity.com | INTERMEDIARY | 4,550 |
| smaato.com | INTERMEDIARY | 3,767 |
| ironsrc.com | INTERMEDIARY | 3,042 |
| pubnative.net | INTERMEDIARY | 1,951 |
| appodeal.com | INTERMEDIARY | 1,056 |
| adnetplus.tv | INTERMEDIARY | 5 |
Apps that declare castify.ai
| App | Store | Relationship | Status |
|---|---|---|---|
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | 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 | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live |
Questions about castify.ai
How do I add castify.ai to app-ads.txt?
Add one line for each account castify.ai gives you: "castify.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 castify.ai. The account ID must be the seller_id castify.ai lists for you in its sellers.json; castify.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 castify.ai publish a sellers.json?
Yes. Its file at https://castify.ai/sellers.json listed 336 sellers when we last read it on 9 October 2026: 309 publishers, 22 intermediaries and 5 listed as both; 0% are confidential.
How many apps declare castify.ai in app-ads.txt?
105,328 apps in Stoqlab's data (delisted apps included) declare castify.ai: 20,284 with at least one DIRECT line and 105,182 with at least one RESELLER line, across 13,442 app-ads.txt files. Counts are recomputed daily.
Why do castify.ai lines fail verification?
Of 39,291 lines naming castify.ai, 10,547 contradict its sellers.json. The most common case is "Seller ID not found" (9,239 lines): Ask castify.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 castify.ai. Something wrong? Tell us.