TokenAPI Scan

Claude Code Domain Detection: The Complete 147-Domain List

Anthropic embedded 147 domains in Claude Code's client-side checks. We verified all 114 relay domains for real-time reachability.

147
Total domains in list
87
Verified alive
51
China-accessible
36
Overseas only
27
Confirmed dead

Background

In July 2026, reverse engineering of Claude Code version 2.1.196 revealed that Anthropic had embedded a domain detection mechanism in the client-side JavaScript. When a user sets ANTHROPIC_BASE_URL to point to a third-party API provider, Claude Code checks the hostname against a hardcoded list of 147 domains and 11 AI lab keywords.

Anthropic later stated this was an experimental anti-distillation measure and removed it in subsequent versions. However, the domain list itself provides a unique, authoritative snapshot of the Claude API relay ecosystem as seen by Anthropic.

Domain Categories

Chinese Tech Giants (17)

Baidu, Alibaba, ByteDance, NetEase, Kuaishou, Xiaohongshu, Ctrip, JD.com, Bilibili, iFlytek, Meituan, and others.

AI Lab Domains (3)

Moonshot, StepFun, MiniMax internal domains — matched via keyword detection.

Infrastructure (3)

Alibaba Cloud Function Compute endpoints (cn-shanghai, cn-beijing fcapp.run).

Claude API Relays (114)

Third-party relay services forwarding requests to Anthropic's API. 87 verified alive.

AI Lab Keywords (11)

In addition to the domain list, Claude Code checks whether the hostname contains any of these keywords:

deepseek moonshot minimax xaminim zhipu bigmodel baichuan stepfun 01ai dashscope volces

Detection Mechanism

Layer 1 — Timezone: Checks Intl.DateTimeFormat().resolvedOptions().timeZone. If Asia/Shanghai or Asia/Urumqi, date format changes from YYYY-MM-DD to YYYY/MM/DD.

Layer 2 — Domain: Extracts hostname from ANTHROPIC_BASE_URL, compares against 147 hardcoded domains (base64 + XOR-91 encoded) and 11 AI lab keywords.

Layer 3 — Steganography: Encodes detection results using Unicode apostrophe variants in the system prompt's "Today's date is" string. Three variants signal different match levels.

Unicode Apostrophe Encoding

Unicode Character Meaning
U+0027 ' (ASCII) No match — clean
U+2019 ' (right single quote) Known domain match (not AI lab)
U+02BC ʼ (modifier letter apostrophe) AI lab keyword match
U+02B9 ʹ (modifier letter prime) Both domain and AI lab match

Verified Relay Sites (292)

All 114 relay domains were tested via dual-path probing (direct + SOCKS5 proxy). 87 sites are alive; 27 confirmed dead were removed. Network accessibility is classified as China-accessible (direct connection works) or Overseas only (requires an overseas network or proxy from within China).

# Domain Network Status
1 2api.rkai6.com China OK ●
2 4sapi.com China OK ●
3 5cookie.cc China OK ●
4 724codes.com China OK ●
5 88996.cloud China OK ●
6 9527code.com China OK ●
7 aaatoken.cn China OK ●
8 ai.17nas.com China OK ●
9 ai.cdn.ad China OK ●
10 ai.centos.hk China OK ●
11 ai.chaozhi.chat China OK ●
12 ai.flashapi.top China OK ●
13 ai.kividas.com China OK ●
14 ai.luminai.cc China OK ●
15 ai.ssgoo.net China OK ●
16 ai.xem8k5.top China OK ●
17 ai.xlyun.pro China OK ●
18 aiapi.world China OK ●
19 aiapify.com China OK ●
20 aiapis.io China OK ●
21 aiberm.com China OK ●
22 aicanapi.com China OK ●
23 aifast.site China OK ●
24 airouter.mxyhi.com China OK ●
25 anpin.ai China OK ●
26 aokapi.com China OK ●
27 api.ablai.top China OK ●
28 api.aicodemirror.com China OK ●
29 api.aircode.xin China OK ●
30 api.aisz.mom China OK ●
31 api.api2cn.com China OK ●
32 api.baobu.xyz China OK ●
33 api.bbww.top China OK ●
34 api.bestmax.cc China OK ●
35 api.bianxie.ai China OK ●
36 api.clawopen.top China OK ●
37 api.code-relay.com China OK ●
38 api.dev88.tech China OK ●
39 api.discordtool.vip China OK ●
40 api.dzzi.ai China OK ●
41 api.ejkoy.com China OK ●
42 api.ekan8.com China OK ●
43 api.euzhi.com China OK ●
44 api.expansion.chat China OK ●
45 api.feng.cx China OK ●
46 api.frontier-intelligence.tech China OK ●
47 api.getezclaw.com China OK ●
48 api.gpt.ge China OK ●
49 api.hack3rx.cn China OK ●
50 api.hangzhale.com China OK ●
51 api.hepingan.top China OK ●
52 api.holdai.top China OK ●
53 api.lconai.com China OK ●
54 api.leleweb.cn China OK ●
55 api.lingshuai.cc China OK ●
56 api.linkapi.org China OK ●
57 api.mkeai.com China OK ●
58 api.openaeon.ai China OK ●
59 api.owlai.tech China OK ●
60 api.qiyiguo.uk China OK ●
61 api.rkai6.com China OK ●
62 api.rpg8.cn China OK ●
63 api.satuo66.online China OK ●
64 api.sbbbbbbbbb.xyz China OK ●
65 api.schyler.top China OK ●
66 api.shiyutv.cn China OK ●
67 api.ssopen.top China OK ●
68 api.sunskii.com China OK ●
69 api.tallius.ai China OK ●
70 api.timebackward.com China OK ●
71 api.tryallai.com China OK ●
72 api.tu-zi.com China OK ●
73 api.v3.cm China OK ●
74 api.vip.crond.dev China OK ●
75 api.wangcai.cloud China OK ●
76 api.whlemon.cn China OK ●
77 api.xpluse.plus China OK ●
78 api.ykh.ai China OK ●
79 api.yuegle.com China OK ●
80 api.yunserver.cn China OK ●
81 apiclaude.cc China OK ●
82 apinova.cc China OK ●
83 apipro.maynor1024.live China OK ●
84 autorouter.io China OK ●
85 az.zlapi.vip China OK ●
86 beecode.cc China OK ●
87 beefapi.com China OK ●
88 bmai.kun8.vip China OK ●
89 bobdong.cn China OK ●
90 bossclaw.org China OK ●
91 buzzai.cc China OK ●
92 callxyq.xyz China OK ●
93 cc-vibe.com China OK ●
94 cc.anyroute.io China OK ●
95 cca.maya.today China OK ●
96 ccfly.codes China OK ●
97 ccgoai.com China OK ●
98 ccmax20.cc China OK ●
99 ccode.dev China OK ●
100 ccrouter.ai China OK ●
101 chaoye.xyz China OK ●
102 chintao.cn China OK ●
103 chiyicn.com China OK ●
104 chunxueapi.com China OK ●
105 clauddy.com China OK ●
106 claude-api.org China OK ●
107 claude-code-hub.app China OK ●
108 claude-opus.top China OK ●
109 claudeapi.com China OK ●
110 claudecn.top China OK ●
111 cloud-cn.dataeyes.ai China OK ●
112 code.deepask.chat China OK ●
113 code.newcli.com China OK ●
114 code.silkapi.com China OK ●
115 code.wenwen-ai.com China OK ●
116 code.x-aio.com China OK ●
117 coderelay.cn China OK ●
118 codesome.ai China OK ●
119 codexone.aieania.tech China OK ●
120 console.claudeapi.com China OK ●
121 cooper-api.com China OK ●
122 dataeyes.ai China OK ●
123 dawclaudecode.com China OK ●
124 ddshub.cc China OK ●
125 deeprouter.top China OK ●
126 derouter.ai China OK ●
127 dhcoder.net China OK ●
128 dmxapi.com China OK ●
129 dragoncode.codes China OK ●
130 duckcode.cn China OK ●
131 duckcoding.com China OK ●
132 easy-token.com China OK ●
133 enjoyapi.cc China OK ●
134 ephone.ai China OK ●
135 ergouapi.com China OK ●
136 fishxcode.com China OK ●
137 fk.hshwk.org China OK ●
138 flapcode.com China OK ●
139 free.learn-ai.top China OK ●
140 freemodel.dev China OK ●
141 fuli.hxi.me China OK ●
142 funnyskill.com China OK ●
143 getgoapi.com China OK ●
144 gpt.hslife.fun China OK ●
145 gpt.zhizengzeng.com China OK ●
146 growupapi.ltd China OK ●
147 hao.ai China OK ●
148 hemaapi.cc China OK ●
149 hiapi.store China OK ●
150 hk.ccplus.site China OK ●
151 hk.hhnto.top China OK ●
152 hongshan.com China OK ●
153 iacc.cc China OK ●
154 infai.cc China OK ●
155 instcopilot-api.com China OK ●
156 jmyr.net China OK ●
157 juxingai.top China OK ●
158 kelaiapi.cc China OK ●
159 kg-api.cloud China OK ●
160 lemongpt.top China OK ●
161 limiao.net China OK ●
162 lingsuan.top China OK ●
163 linkai.shop China OK ●
164 linkapi.ai China OK ●
165 linoapi.com China OK ●
166 llm-all.pro China OK ●
167 llmgw.cn China OK ●
168 loptu.net China OK ●
169 lucen.cc China OK ●
170 main-new.codesuc.top China OK ●
171 minitoken.top China OK ●
172 mnapi.com China OK ●
173 modcon.top China OK ●
174 mx.free.codesonline.dev China OK ●
175 mytokenpi.com China OK ●
176 mzlone.top China OK ●
177 nbapi.cc China OK ●
178 nbility.dev China OK ●
179 nekocode.ai China OK ●
180 new-api.u4vr.com China OK ●
181 new.050602.xyz China OK ●
182 new.xychatai.com China OK ●
183 nexaxis.ai China OK ●
184 nextoken.online China OK ●
185 ogog.ai China OK ●
186 one.ocoolai.com China OK ●
187 oneapi.paintbot.top China OK ●
188 open.xiaojingai.com China OK ●
189 opentk.ai China OK ●
190 otokapi.com China OK ●
191 packyapi.com China OK ●
192 pixelmuse.shop China OK ●
193 platform.ope.ai China OK ●
194 poixe.com China OK ●
195 poloai.top China OK ●
196 portal.gpteamservices.com China OK ●
197 ppword.cn China OK ●
198 prismapi.site China OK ●
199 proxy2it.com China OK ●
200 qiuqiutoken.com China OK ●
201 right.codes China OK ●
202 runapi.co China OK ●
203 safeapi.vip China OK ●
204 sparkcode.top China OK ●
205 store.zzyus.top China OK ●
206 sub2.congmingai.com China OK ●
207 sub2api.luchikey.com China OK ●
208 subrouter.ai China OK ●
209 sudobug.top China OK ●
210 sudocode.chat China OK ●
211 sudocode.us China OK ●
212 superapi.buzz China OK ●
213 switchbase.vip China OK ●
214 terminal.pub China OK ●
215 thestocklist.site China OK ●
216 tiantianai.pro China OK ●
217 token.baogutang.top China OK ●
218 tokeness.cn China OK ●
219 tokenflux.dev China OK ●
220 tokenmix.ai China OK ●
221 tokenonly.ai China OK ●
222 toknex.ai China OK ●
223 tongapi.com China OK ●
224 toolcode.top China OK ●
225 traxnode.com China OK ●
226 uiuiapi.com China OK ●
227 unity2.ai China OK ●
228 uocode.com China OK ●
229 us.usclaude.us China OK ●
230 user.tocodex.com China OK ●
231 uuapi.net China OK ●
232 vip.undyingapi.com China OK ●
233 wangxiangai.org China OK ●
234 wolfai.top China OK ●
235 worldbase.ai China OK ●
236 www.1314mc.net China OK ●
237 www.aiwanwu.cc China OK ●
238 www.dmxapi.cn China OK ●
239 www.heiyucode.com China OK ●
240 www.huanapi.com China OK ●
241 www.right.codes China OK ●
242 www.shitapi.cn China OK ●
243 x.dogenet.win China OK ●
244 xb1520.com China OK ●
245 xcode.best China OK ●
246 xiaohuapi.site China OK ●
247 xiaohuliapi.pw China OK ●
248 xiaohumini.site China OK ●
249 xiaoruiapi.cc China OK ●
250 xyc.ai China OK ●
251 yundu.lat China OK ●
252 yunwu.ai China OK ●
253 yunwu.zeabur.app China OK ●
254 zenmux.ai China OK ●
255 zhangyuapi.com China OK ●
256 zivv.pro China OK ●
257 zxai.work China OK ●
258 zz.aigm99.cn China OK ●
259 91code.pro Overseas ●
260 992236.xyz Overseas ●
261 ai.hybgzs.com Overseas ●
262 aicodemirror.com Overseas ●
263 aicoding.sh Overseas ●
264 api.b.ai Overseas ●
265 api.bltcy.ai Overseas ●
266 api.cpass.cc Overseas ●
267 api.ikuncode.cc Overseas ●
268 api.oaipro.com Overseas ●
269 api.uglycat.cc Overseas ●
270 api.uniprep.world Overseas ●
271 api.xty.app Overseas ●
272 augmunt.com Overseas ●
273 b4u.qzz.io Overseas ●
274 claudeide.net Overseas ●
275 co.yes.vg Overseas ●
276 codeilab.com Overseas ●
277 codexopenai.cloud Overseas ●
278 cubence.com Overseas ●
279 daodunapi.com Overseas ●
280 foxcode.hshwk.org Overseas ●
281 foxcode.rjj.cc Overseas ●
282 jeniya.top Overseas ●
283 one-api.bltcy.top Overseas ●
284 privnode.com Overseas ●
285 proxyai.com Overseas ●
286 qinzhiai.com Overseas ●
287 runanytime.hxi.me Overseas ●
288 uniapi.ai Overseas ●
289 wzw.pp.ua Overseas ●
290 xairouter.com Overseas ●
291 xaixapi.com Overseas ●
292 yansd666.com Overseas ●

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FAQ

What is the Claude Code domain list?

Claude Code's client-side code contained 147 hardcoded domains used to detect when users connect through third-party API providers instead of the official Anthropic endpoint. The list includes Chinese tech giants, AI lab domains, infrastructure domains, and 124 Claude API relay services.

How many Claude relay sites are still active?

As of July 2026, 87 out of 114 relay domains are verified alive. 51 are directly accessible from China and 36 require an overseas network connection. 27 domains are confirmed dead.

How does Claude Code detect relay usage?

Claude Code checks the ANTHROPIC_BASE_URL environment variable against 147 hardcoded domains and 11 AI lab keywords. It also checks the system timezone. Results are encoded using Unicode apostrophe variants in the system prompt's date string.

Were these relay domains officially confirmed by Anthropic?

The domains were discovered through reverse engineering of Claude Code version 2.1.196. Anthropic stated the detection was an experimental anti-distillation measure and removed it in later versions.