The three network variables that decide usability
The same account can hold a conversation on one route and then report the region as unavailable on another. Most of these cases are not about the account itself: three properties of the exit IP are at work — where it is registered, the reputation of its IP block, and how stable the link is. They are independent, so check them separately.
Region checks
Tools read the location of your exit IP at sign-in and on every conversation. The decision comes from an IP geolocation database, not from your browser language or system time zone. If the exit lands in a region the service does not serve, the page simply says it is unavailable; if it lands in a supported region but the IP block is flagged as a data center, you may be asked for extra verification.
IP block reputation
Risk systems look at the history of the whole IP block, not a single request. If a shared exit carries a lot of abnormal traffic, the entire block gets downranked — you see more verification at sign-in, conversations that drop mid-answer, or a "too many requests" reply. Routes with a fixed exit and fewer users per block hit this far less often.
Long-lived connection stability
Chat-style tools stream their answers, and a single answer can run for tens of seconds. If the link wobbles midway, the front end freezes mid-sentence. This kind of failure does not show up as a page that will not load; it shows up as packet loss and route changes, and it is worst at peak hours.
Put the three together and you get a conclusion that runs against intuition: when choosing a route, how fixed the exit is matters more than peak speed. A route whose exit stays the same and whose block behaves cleanly suits AI tools better than one that tests fast but changes exit often. VPN31 offers routes in three classes — IEPL dedicated, relay and direct — and across 100+ countries / 230+ routes, different regions suit different tools.
Tools and route types compared
The table below gives a default recommendation per tool. The same tool behaves differently in different regions, so the route type listed is a starting point, not the only answer; if a particular route performs better in your region, go with what you actually observe.
| Tool | Network requirements | Suggested route | Notes |
|---|---|---|---|
| ChatGPT | Both sign-in and chat check the exit location; sensitive to region jumps | IEPL dedicated | Keep the same exit region for sign-up, sign-in and chat |
| Claude | Sensitive to IP block reputation; repeated sign-ins from one exit trigger extra verification | IEPL dedicated / premium relay | When asked to verify, retry on the original exit instead of switching routes |
| Gemini | Tied to the account's region; must match the exit region | IEPL dedicated | Align account region with exit region; avoid signing in across regions |
| Copilot | Depends on the account session and a persistent connection; long sessions are common | Relay / direct | Stability first; moderate bandwidth needs |
| Midjourney | Used through a chat client; long connections plus image uploads | Relay / IEPL dedicated | Large uploads are more sensitive to upstream; compress before sending |
| Cursor | Long connections in the editor plus frequent small completion requests | Low-latency direct / relay | Completion feel is decided by round-trip time, not bandwidth |
Two more points. First, a route type marked as suggested means the tool is more sensitive to that route's characteristics — it does not mean other types will not work. Second, do not hop one account between several routes: every switch changes the exit region, and what risk systems see is frequent jumping, not you optimising your experience.
What to watch at sign-up and sign-in
Sign-up and the first sign-in are the two most sensitive moments. Most tools write the exit region used at sign-up into the account profile, so a later sign-in from a different region triggers both a region check and a session failure. The workable approach is to complete sign-up, first sign-in and first conversation on the same route, and only then consider changing routes.
If you are asked for extra verification, go back to the exit you used at sign-up and retry there rather than switching routes repeatedly. To a risk system, repeated switching looks like classic abnormal behaviour, and the more you retry, the longer recovery takes. If the original exit still fails, check whether the browser is holding cached state from the previous session.
Do not run several clients on one device at the same time. With multiple routes stacked, the actual exit is decided by the system routing table, and you cannot tell which route your traffic leaves through — which makes troubleshooting impossible. If you need several routes, put them on different devices, or keep only one switched on.
VPN31 sign-up needs no email address — a username and password are enough. One account has no device limit, so you can sign in separately on several devices. Fix each device to the same route to cut down on verification caused by exit changes.
Web app vs API calls
The web app and API calls go through the same service, but they fail in completely different ways. Web problems are visible; API problems are often just a timeout in a log.
| Item | Web app | API calls |
|---|---|---|
| Session shape | Browser session plus a long-lived connection; answers stream back | Short requests, high concurrency, retries controlled by the caller |
| Region checks | Exit IP, account region and browser environment together | Mainly the exit IP and the key |
| How a drop shows up | The answer stops mid-sentence; the front end waits until it times out | Request timeout or connection reset |
| Route requirements | Fixed exit, stable long-lived connection | Fixed exit, stable DNS resolution, headroom for concurrency |
Web failures are mostly visible: a spinner that never stops, an answer that halts mid-sentence, a page saying the region is unavailable. API failures are quieter: a request times out, or returns 403 or 429 — and if the caller has no retry and backoff logic, jobs simply fail at random.
403 usually relates to region or permissions, while 429 means a rate limit was hit. They need different handling: adjust the exit region for the first, lower concurrency and add backoff for the second. Retrying both together only makes things worse.
One more thing that is easy to miss with APIs: the same key calling from exits in several countries within a short window is treated as abnormal. If the caller is a server, pin the server's exit to one region; if the caller is your own machine, avoid switching routes while a job is running.
Developer setup essentials
Command-line tools
Command-line programs read environment variables, not the system proxy settings. Export the proxy variables in your shell, then send one request to confirm the exit actually changed; put addresses that should not go through the proxy into NO_PROXY so internal requests are not routed out. The variables apply only to the current session, so a new terminal needs them exported again.
export HTTPS_PROXY=http://127.0.0.1:7890
export HTTP_PROXY=http://127.0.0.1:7890
export NO_PROXY=localhost,127.0.0.1
curl -sS https://api.example.com/v1/modelsEditors and extensions
Some extensions follow the system proxy, others read their own settings — when the two disagree you get "works in the browser, not in the editor". Completion requests are frequent small packets, more sensitive to round-trip time than to bandwidth; if only completions lag while chat is fine, suspect route latency before bandwidth.
Pipelines and CI
Do not commit subscription URLs into the repository. Inject them through environment variables or a secrets manager, and confirm the build log does not print them. Keep runner nodes in one region where possible, so each build does not leave from a different exit and make jobs flaky and hard to reproduce. For long-running batch jobs, use a separate route with a fixed exit, kept apart from the route you debug with by hand.
Common failure symptoms and causes
The six symptoms below cover most network problems with AI tools. Each one gives the conclusion first, then the next step.
The page loads, but sign-in says the region is unavailable
The exit location does not match the region the account was registered in, or the exit IP block is flagged as a data center. Switch the exit back to the region used at sign-up and sign in again; do not keep clicking the sign-in button in the same state.
The answer stops halfway through
The long-lived connection dropped, usually from packet loss or a route change. Retry on a route with a fixed exit; if it only happens at peak hours, the link is congested rather than the account being at fault — shift your usage window or move to a dedicated line.
"Too many requests" appears
Request volume from the same IP block on a shared exit is too high and the whole block is downranked. Fixed-exit dedicated lines hit this less often; when it appears, waiting a while before retrying works better than retrying in a loop.
File or image uploads fail
Upstream bandwidth is short, or the connection is reset mid-upload. Image tools are more sensitive to upstream, so compress before uploading; sending a large file in a few chunks succeeds more often than one big transfer.
The API returns 403 or 429
403 is usually a region or permission issue, 429 is a rate limit. Change the exit region for the first, lower concurrency and add backoff for the second — do not retry the two together.
Only one tool fails, everything else works
That means the route itself is fine and the tool's own risk policy is at work. Adjust the exit region for that tool; there is no need to change the whole route.
Route recommendations
- Use one IEPL dedicated line with a fixed exit as your main route for both sign-up and daily use, and do not switch often.
- Keep a relay route as backup and switch manually if the dedicated line misbehaves; after switching, confirm the exit region before signing in.
- Developers can add a low-latency direct route for editor completions, kept separate from the route used for chat.
- Fix each device to its own route; do not stack several clients on one device.
The route list is organised by region and route type on the routes page, with every route labelled IEPL dedicated / relay / direct; prices and data tiers are on the pricing page, where three monthly plans and three data packs sit side by side. Before choosing, work out which tools you actually use, then pick a route type from the table above — that is less hassle than picking by price.
Every plan comes with a 14-day money-back guarantee; data packs last until used up and never expire. Payment is by Alipay / WeChat / USDT. Monthly plan data resets each month on the activation date, and mid-term upgrades are prorated against the remaining days.