App Supply Index Monitor my app
iOS · NAVER WEBTOON Ltd.

WEBTOON: Manga, Comics, Manhwa

Developer URL
https://www.webtoons.com
app-ads.txt
https://www.webtoons.com/app-ads.txt · 200
Checked
Oct 7, 2026
C
62/100

5,566 lines · 4,097 verified against sellers.json

Findings

Each finding lists the exact lines involved. Findings are automated observations of public files as of Oct 7, 2026. They describe file contents, not the intent or conduct of any company.

warning

DIRECT lines inconsistent with public data

281 −25 pts

The ads.txt specification defines DIRECT as an account the publisher directly controls. For these lines, either the ad system's own sellers.json lists the account as INTERMEDIARY, or the same account is marked DIRECT in the files of 3 or more unrelated companies. Either way, the public data does not support the DIRECT label. Buyers that use DIRECT labels in supply-path decisions may treat these lines differently.

How to fixUse DIRECT only for accounts your company controls. Confirm with each partner whether the account is yours; if it isn't, the specification calls for RESELLER.
Evidence (25 of 281) 
line 18     pubmatic.com, 158419, DIRECT, 5d62403b186f2ace
             → observed: sellers.json lists the account as INTERMEDIARY  name in sellers.json: WEBTOON Entertainment Inc. (via EB)  domain in sellers.json: google.com
line 22     rubiconproject.com, 19822, DIRECT, 0bfd66d529a55807
             → observed: sellers.json lists the account as INTERMEDIARY  name in sellers.json: Google  domain in sellers.json: google.com
line 25     sovrn.com, 297837, DIRECT, fafdf38b16bf6b2b
             → observed: the same account is marked DIRECT by 4 different companies
line 29     triplelift.com, 8035-EB, DIRECT, 6c33edb13117fd86
             → observed: sellers.json lists the account as INTERMEDIARY  name in sellers.json: WEBTOON (via EB Network)  domain in sellers.json: google.com
line 2215   videoshakers.tv, 58204917364298, DIRECT, 819580c2afa8a3aa
             → observed: sellers.json lists the account as INTERMEDIARY; the same account is marked DIRECT by 15 different companies  name in sellers.json: Verve  domain in sellers.json: pubnative.net
line 2245   iion.io, 10329, DIRECT, 013a29748465dc57
             → observed: the same account is marked DIRECT by 50 different companies  name in sellers.json: Big Cake  domain in sellers.json: bigcakegame.com
line 2257   conversantmedia.com, 100322, DIRECT, 03113cd04947736d
             → observed: the same account is marked DIRECT by 66 different companies  name in sellers.json: Luna Media Group LLC  domain in sellers.json: lunamedia.io
line 2260   conversantmedia.com, 100141, DIRECT, 03113cd04947736d
             → observed: sellers.json lists the account as INTERMEDIARY; the same account is marked DIRECT by 56 different companies  name in sellers.json: 33Across  domain in sellers.json: 33across.com
line 2269   conversantmedia.com, 100218, DIRECT, 03113cd04947736d
             → observed: the same account is marked DIRECT by 31 different companies  name in sellers.json: Leanback Digital  domain in sellers.json: leanback.digital
line 2359   markappmedia.site, C-1021, DIRECT, 1ddf21e4cc2e32a1
             → observed: the same account is marked DIRECT by 66 different companies  name in sellers.json: pulishertest  domain in sellers.json: test.com
line 2366   themediagrid.com, SWH94X, DIRECT, 35d5010d7789b49d
             → observed: the same account is marked DIRECT by 59 different companies  name in sellers.json: Bidmachine, Inc  domain in sellers.json: bidmachine.io
line 2368   themediagrid.com, RVQDTI, DIRECT, 35d5010d7789b49d
             → observed: sellers.json lists the account as INTERMEDIARY; the same account is marked DIRECT by 73 different companies  name in sellers.json: ORANGE CLICK MEDIA & COMMERCE LTD  domain in sellers.json: orangeclickmedia.com
line 2369   themediagrid.com, FALINO, DIRECT, 35d5010d7789b49d
             → observed: sellers.json lists the account as INTERMEDIARY; the same account is marked DIRECT by 103 different companies  name in sellers.json: Luna Media Group LLC  domain in sellers.json: lunamedia.io
line 2375   themediagrid.com, DQ6AMB, DIRECT, 35d5010d7789b49d
             → observed: sellers.json lists the account as INTERMEDIARY; the same account is marked DIRECT by 54 different companies  name in sellers.json: Insticator Inc.  domain in sellers.json: insticator.com
line 2392   themediagrid.com, 4WPRHV, DIRECT, 35d5010d7789b49d
             → observed: the same account is marked DIRECT by 33 different companies  name in sellers.json: MonetizeGo - App - custom S2S oRTB  domain in sellers.json: omgstudios.com
line 2407   lunamedia.io, d7190c50-6c49-40d1-a716-1943623e120b, DIRECT, 524ecb396915caaf
             → observed: the same account is marked DIRECT by 63 different companies
line 2409   lunamedia.io, 1a9f3d47b2e84cf1a6c3e8b5f72a4d91, DIRECT, 524ecb396915caaf
             → observed: the same account is marked DIRECT by 54 different companies
line 2410   lunamedia.io, 30add2f4-b99b-40d3-a5e3-4bdb159c238f, DIRECT, 524ecb396915caaf
             → observed: the same account is marked DIRECT by 50 different companies
line 2413   lunamedia.io, 58652f8d-ba64-479e-89a7-dd7ac8b1566e, DIRECT, 524ecb396915caaf
             → observed: the same account is marked DIRECT by 30 different companies
line 2414   opera.com, pub6148735850944, DIRECT, 55a0c5fd61378de3
             → observed: sellers.json lists the account as INTERMEDIARY; the same account is marked DIRECT by 59 different companies  name in sellers.json: Bidmachine  domain in sellers.json: bidmachine.io
line 2420   opera.com, pub14697364338304, DIRECT, 55a0c5fd61378de3
             → observed: the same account is marked DIRECT by 48 different companies
line 2424   lkqd.net, 1100058249, DIRECT, 59c49fa9598a0117
             → observed: sellers.json lists the account as INTERMEDIARY; the same account is marked DIRECT by 63 different companies  name in sellers.json: Pubrev+  domain in sellers.json: pubrevplus.com
line 2462   pubmatic.com, 95054, DIRECT, 5d62403b186f2ace
             → observed: sellers.json lists the account as INTERMEDIARY; the same account is marked DIRECT by 54 different companies  name in sellers.json: Insticator Inc. (dba The COOL Company)  domain in sellers.json: insticator.com
line 2509   openx.com, 563905670, DIRECT, 6a698e2ec38604c6
             → observed: the same account is marked DIRECT by 50 different companies
line 2516   openx.com, 564921063, DIRECT, 6a698e2ec38604c6
             → observed: the same account is marked DIRECT by 36 different companies
warning

Seller IDs not listed in the ad system's sellers.json

565 −11 pts

The ad system's current sellers.json doesn't list these accounts, so buyers that validate the chain can't match them. Common causes are closed accounts or former partners.

How to fixAsk each partner whether the account is still active and request their current lines; remove lines for closed accounts.
Evidence (25 of 565) 
line 39     teads.tv, 28475, DIRECT, 15a9c44f6d26cbe1
             → sellers_json: https://teads.tv/sellers.json
line 131    e-planning.net, 75f09c55845dd6e3, RESELLER, c1ba615865ed87b2
             → sellers_json: https://e-planning.net/sellers.json
line 146    video.unrulymedia.com, 876890970, RESELLER, 98c21ef9a666c68b
             → sellers_json: https://video.unrulymedia.com/sellers.json
line 164    media.net, 8CU43768M, RESELLER, 818f58666cabc936
             → sellers_json: https://media.net/sellers.json
line 286    themediagrid.com, OTJDBI, RESELLER, 35d5010d7789b49d
             → sellers_json: https://themediagrid.com/sellers.json
line 290    ssp.cadent.com, 2599, RESELLER, 1e1d41537f7cad7f
             → sellers_json: https://ssp.cadent.com/sellers.json
line 316    rubiconproject.com, 25064, RESELLER, 0bfd66d529a55807
             → sellers_json: https://rubiconproject.com/sellers.json
line 397    carliba.io, 184101, RESELLER
             → sellers_json: https://carliba.io/sellers.json
line 464    thunder-monetize.com, 1007485, RESELLER
             → sellers_json: https://thunder-monetize.com/sellers.json
line 469    video.unrulymedia.com, 1659706078112220000, RESELLER
             → sellers_json: https://video.unrulymedia.com/sellers.json
line 473    video.unrulymedia.com, 2736329702851200000, RESELLER
             → sellers_json: https://video.unrulymedia.com/sellers.json
line 479    video.unrulymedia.com, 649652654350370000, RESELLER
             → sellers_json: https://video.unrulymedia.com/sellers.json
line 481    video.unrulymedia.com, 667989109, RESELLER
             → sellers_json: https://video.unrulymedia.com/sellers.json
line 509    video.unrulymedia.com, 649652654350370000, RESELLER, 98c21ef9a666c68b
             → sellers_json: https://video.unrulymedia.com/sellers.json
line 571    onetag.com, 59aa7be4921bac8, RESELLER
             → sellers_json: https://onetag.com/sellers.json
line 576    zmaticoo.com, 113149, RESELLER
             → sellers_json: https://zmaticoo.com/sellers.json
line 601    mindtos.com, mt45eb5f865ce39e1b, RESELLER
             → sellers_json: https://mindtos.com/sellers.json
line 611    rubiconproject.com, 26168, RESELLER, 0bfd66d529a55807
             → sellers_json: https://rubiconproject.com/sellers.json
line 661    conversantmedia.com, 100331, RESELLER, 03113cd04947736d
             → sellers_json: https://conversantmedia.com/sellers.json
line 688    rubiconproject.com, 15044, RESELLER, 0bfd66d529a55807
             → sellers_json: https://rubiconproject.com/sellers.json
line 689    rubiconproject.com, 26694, RESELLER, 0bfd66d529a55807
             → sellers_json: https://rubiconproject.com/sellers.json
line 693    rubiconproject.com, 26504, RESELLER, 0bfd66d529a55807
             → sellers_json: https://rubiconproject.com/sellers.json
line 696    rubiconproject.com, 24606, RESELLER, 0bfd66d529a55807
             → sellers_json: https://rubiconproject.com/sellers.json
line 698    rubiconproject.com, 26158, RESELLER, 0bfd66d529a55807
             → sellers_json: https://rubiconproject.com/sellers.json
line 709    adview.com, 6667060, RESELLER, 1b2cc038a11ea319
             → sellers_json: https://adview.com/sellers.json
warning

Lines for ad system domains that don't resolve

24 −1 pts

These ad system domains don't resolve (the domain may be retired, merged or misspelled). The lines can't be validated, and if the domain is registered again, its new holder would appear authorized.

How to fixRemove these lines. If the domain is registered again, its new holder would appear authorized by your file.
Evidence (24) 
line 1839   districtm.io, 101649, RESELLER, 3fd707be9c4527c3
             → ad_system: districtm.io
line 1940   engagebdr.com, 10181, RESELLER
             → ad_system: engagebdr.com
line 1945   engagebdr.com, 10423, RESELLER
             → ad_system: engagebdr.com
line 1955   engagebdr.com, 10252, RESELLER
             → ad_system: engagebdr.com
line 2020   ylhglobal.com, 1930587443, RESELLER
             → ad_system: ylhglobal.com
line 2361   gamoshi.io, 267-b2713, RESELLER, 20e30b2ae1f670f2
             → ad_system: gamoshi.io
line 3771   showcaesad.com, 806322774, RESELLER
             → ad_system: showcaesad.com
line 3869   antipodesdigital.live, 321, RESELLER
             → ad_system: antipodesdigital.live
line 3989   adpopcornssp.com, 264463435, DIRECT
             → ad_system: adpopcornssp.com
line 3990   adpopcornssp.com, 293366276, DIRECT
             → ad_system: adpopcornssp.com
line 3991   adpopcornssp.com, 347033396, DIRECT
             → ad_system: adpopcornssp.com
line 3992   adpopcornssp.com, 506645163, DIRECT
             → ad_system: adpopcornssp.com
line 3993   adpopcornssp.com, 593362307, DIRECT
             → ad_system: adpopcornssp.com
line 3994   adpopcornssp.com, 626032167, DIRECT
             → ad_system: adpopcornssp.com
line 3995   adpopcornssp.com, 62849003, DIRECT
             → ad_system: adpopcornssp.com
line 3996   adpopcornssp.com, 702500897, DIRECT
             → ad_system: adpopcornssp.com
line 3997   adpopcornssp.com, 736980247, DIRECT
             → ad_system: adpopcornssp.com
line 3998   adpopcornssp.com, 824625079, DIRECT
             → ad_system: adpopcornssp.com
line 4091   districtm.io, 102098, RESELLER, 3fd707be9c4527c3
             → ad_system: districtm.io
line 4106   gamoshi.io, 267-b3609, RESELLER
             → ad_system: gamoshi.io
line 4107   gamoshi.io, 267-b4627, RESELLER
             → ad_system: gamoshi.io
line 4108   gamoshi.io, 267-b4800, RESELLER, 20e30b2ae1f670f2
             → ad_system: gamoshi.io
line 4253   reforge.in, 353, RESELLER
             → ad_system: reforge.in
line 4447   gamoshi.io, 267-b4627, RESELLER, 20e30b2ae1f670f2
             → ad_system: gamoshi.io
info

Duplicate lines

365 −1 pts

Harmless but a sign of copy-paste maintenance.

How to fixRemove duplicates; keep one copy of each line.
Evidence (25 of 365) 
ad_system: appnexus.com  seller_id: 13293  relationship: RESELLER
ad_system: appnexus.com  seller_id: 15774  relationship: RESELLER
ad_system: xandr.com  seller_id: 13799  relationship: RESELLER
ad_system: xandr.com  seller_id: 13955  relationship: RESELLER
ad_system: xandr.com  seller_id: 15769  relationship: RESELLER
ad_system: xandr.com  seller_id: 15840  relationship: RESELLER
ad_system: limpid.tv  seller_id: 203726  relationship: RESELLER
ad_system: sharethrough.com  seller_id: 1leever6  relationship: RESELLER
ad_system: sharethrough.com  seller_id: pll9clon  relationship: RESELLER
ad_system: themediagrid.com  seller_id: 8zrkbe  relationship: RESELLER
ad_system: adform.com  seller_id: 3016  relationship: RESELLER
ad_system: adform.com  seller_id: 3283  relationship: RESELLER
ad_system: adform.com  seller_id: 3344  relationship: RESELLER
ad_system: xad.com  seller_id: 963  relationship: RESELLER
ad_system: media.net  seller_id: 8cu132ud6  relationship: RESELLER
ad_system: media.net  seller_id: 8cu1ffb49  relationship: RESELLER
ad_system: media.net  seller_id: 8cu5l226o  relationship: RESELLER
ad_system: media.net  seller_id: 8cuj45kqq  relationship: RESELLER
ad_system: media.net  seller_id: 8cun37dcc  relationship: RESELLER
ad_system: media.net  seller_id: 8cu12aq1y  relationship: RESELLER
ad_system: media.net  seller_id: 8cu1cp7pm  relationship: RESELLER
ad_system: media.net  seller_id: 8cu43768m  relationship: RESELLER
ad_system: media.net  seller_id: 8cu76268d  relationship: RESELLER
ad_system: media.net  seller_id: 8cu7b073b  relationship: RESELLER
ad_system: media.net  seller_id: 8cu7h33b7  relationship: RESELLER
info

Ad systems without a public sellers.json

1,009

The ad system doesn't publish a readable sellers.json, so nobody can verify these lines. That's the ad system's gap, not the app's, so no points are deducted.

How to fixAsk the partner to publish sellers.json; until then buyers can't verify that path.
Evidence (25 of 1,009) 
line 13     openx.com, 557921900, DIRECT, 6a698e2ec38604c6
             → sellers_json: HTTP 403 to automated requests
line 14     openx.com, 540094925, DIRECT, 6a698e2ec38604c6
             → sellers_json: HTTP 403 to automated requests
line 15     openx.com, 565025604, DIRECT, 6a698e2ec38604c6
             → sellers_json: HTTP 403 to automated requests
line 25     sovrn.com, 297837, DIRECT, fafdf38b16bf6b2b
             → sellers_json: HTTP 403 to automated requests
line 32     pubnative.net, 1234567, DIRECT, d641df8625486a7b
             → sellers_json: HTTP 403 to automated requests
line 33     pubnative.net, 1007510, DIRECT, d641df8625486a7b
             → sellers_json: HTTP 403 to automated requests
line 36     smaato.com, 1100054169, DIRECT, 07bcf65f187117b4
             → sellers_json: HTTP 403 to automated requests
line 45     facebook.com, 3631399360252850, DIRECT, c3e20eee3f780d68
             → sellers_json: returns a web page, not a sellers.json file
line 46     facebook.com, 441918422681323, RESELLER, c3e20eee3f780d68
             → sellers_json: returns a web page, not a sellers.json file
line 66     appnexus.com, 12964, RESELLER, f5ab79cb980f11d1
             → sellers_json: HTTP 403 to automated requests
line 67     appnexus.com, 12976, RESELLER, f5ab79cb980f11d1
             → sellers_json: HTTP 403 to automated requests
line 68     appnexus.com, 13099, RESELLER, f5ab79cb980f11d1
             → sellers_json: HTTP 403 to automated requests
line 69     appnexus.com, 13293, RESELLER, f5ab79cb980f11d1
             → sellers_json: HTTP 403 to automated requests
line 70     appnexus.com, 13956, RESELLER, f5ab79cb980f11d1
             → sellers_json: HTTP 403 to automated requests
line 71     appnexus.com, 14538, RESELLER, f5ab79cb980f11d1
             → sellers_json: HTTP 403 to automated requests
line 72     appnexus.com, 15349, RESELLER, f5ab79cb980f11d1
             → sellers_json: HTTP 403 to automated requests
line 73     appnexus.com, 15774, RESELLER, f5ab79cb980f11d1
             → sellers_json: HTTP 403 to automated requests
line 74     appnexus.com, 15980, RESELLER, f5ab79cb980f11d1
             → sellers_json: HTTP 403 to automated requests
line 75     appnexus.com, 17417, RESELLER, f5ab79cb980f11d1
             → sellers_json: HTTP 403 to automated requests
line 84     pubnative.net, 1004796, RESELLER, d641df8625486a7b
             → sellers_json: HTTP 403 to automated requests
line 85     pubnative.net, 1007055, RESELLER, d641df8625486a7b
             → sellers_json: HTTP 403 to automated requests
line 86     pubnative.net, 1007449, RESELLER, d641df8625486a7b
             → sellers_json: HTTP 403 to automated requests
line 87     pubnative.net, 1007974, RESELLER, d641df8625486a7b
             → sellers_json: HTTP 403 to automated requests
line 88     pubnative.net, 1008379, RESELLER, d641df8625486a7b
             → sellers_json: HTTP 403 to automated requests
line 89     pubnative.net, 1009046, RESELLER, d641df8625486a7b
             → sellers_json: HTTP 403 to automated requests
info

DIRECT accounts marked confidential

5

Buyers can't see who owns these accounts.

How to fixAsk the ad system to publish your seller entry with name and domain.
Evidence (5) 
line 4059   bidence.com, 33e179e0cbebd2f91f2f1e15d848bc32, DIRECT
line 4062   bidence.com, ac6abd1022213c05377c1b26dbac5f36, DIRECT
line 4063   bidence.com, b4f93a4ed37b21b2d8907fdb86103fb2, DIRECT
line 4073   cauly.co.kr, 16216, DIRECT
line 4109   genieesspv.jp, 1081, DIRECT

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