Ad system
flashb.id
flashb.id is the domain an ad system uses in app-ads.txt and ads.txt files. 32,362 apps in our data declare it. Its sellers.json lists 13,274 sellers.
- Apps declaring it
- 32,362
- Sellers in sellers.json
- 13,274
- Lines verified
- 29%
- Lines with errors
- 5,059
- Avg. supply path score
- 50.4 / 100
8,485 DIRECT · 30,698 RESELLER
0% confidential
2,115 of 7,215 checked lines
7,215 lines in total
32,218 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 10 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 flashb.id 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.
flashb.id, YOUR_ACCOUNT_ID, DIRECT
flashb.id, YOUR_ACCOUNT_ID, RESELLER- Field 1:
flashb.id, the domain flashb.id uses in app-ads.txt. - Field 2: your account ID with flashb.id. It must equal the
seller_idin flashb.id'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 flashb.id carry none, or different ones, so we do not suggest one.
sellers.json at a glance
- Status
- Published
- Sellers listed
- 13,274
- Confidential
- 0 (0%)
- Passthrough
- 0
- Removed, last 30 days
- 246
- Last read
- Oct 10, 2026
- PUBLISHER13,256
- INTERMEDIARY12
- BOTH6
Cross-check of lines naming flashb.id
- Verified 2,115
- Seller ID not found 1,453
- DIRECT but intermediary 5
- RESELLER but publisher 3,601
- Seller type BOTH 41
- Confidential seller 0
- No sellers.json 0
- Unchecked 0
Every line naming flashb.id is looked up in its sellers.json. What each status means
Common errors with flashb.id lines
-
RESELLER but publisher
3,601 lines
If the account is yours, declare it DIRECT. If a partner holds it, ask flashb.id why the account is listed as PUBLISHER.
-
Seller ID not found
1,453 lines
Ask flashb.id 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
41 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.
-
DIRECT but intermediary
5 lines
If a partner holds this account and resells your inventory, the line should say RESELLER. If the account is yours, ask flashb.id to list it as PUBLISHER.
Intermediaries most declared as RESELLER
Accounts on flashb.id 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 |
|---|---|---|
| eskimi.com | INTERMEDIARY | 562 |
| tapmind.com | BOTH | 41 |
| copper6.com | INTERMEDIARY | 17 |
Apps that declare flashb.id
| App | Store | Relationship | Status |
|---|---|---|---|
| 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 | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | DIRECT | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live |
Questions about flashb.id
How do I add flashb.id to app-ads.txt?
Add one line for each account flashb.id gives you: "flashb.id, YOUR_ACCOUNT_ID, DIRECT". Use DIRECT when you hold the account yourself and RESELLER when a partner holds it and sells your inventory through flashb.id. The account ID must be the seller_id flashb.id lists for you in its sellers.json; flashb.id 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 flashb.id publish a sellers.json?
Yes. Its file at https://flashb.id/sellers.json listed 13,274 sellers when we last read it on 10 October 2026: 13,256 publishers, 12 intermediaries and 6 listed as both; 0% are confidential.
How many apps declare flashb.id in app-ads.txt?
32,362 apps in Stoqlab's data (delisted apps included) declare flashb.id: 8,485 with at least one DIRECT line and 30,698 with at least one RESELLER line, across 3,121 app-ads.txt files. Counts are recomputed daily.
Why do flashb.id lines fail verification?
Of 7,215 lines naming flashb.id, 5,059 contradict its sellers.json. The most common case is "RESELLER but publisher" (3,601 lines): If the account is yours, declare it DIRECT. If a partner holds it, ask flashb.id why the account is listed as PUBLISHER.
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 flashb.id. Something wrong? Tell us.