Clash Subscription Update Failing? Update Interval & Proxy Update Settings Explained

Common Errors and Triggers Behind Subscription Update Failures

After clicking the "Update" button in the client, failures generally fall into three categories. The first is connection errors, such as "Request timed out," "Unable to connect to server," or "Network error" — usually a problem somewhere between your local network and the subscription domain, which could be a DNS resolution issue, a local firewall block, or the subscription server being temporarily unreachable. The second is status-code errors, such as a 403 or 429 response, which mostly come from access controls on the provider's side — too many requests from a single IP, an unrecognized User-Agent, or an expired account. The third is parsing errors, showing messages like "Invalid config format" or "YAML parse failed," which means the request succeeded in fetching content, but the returned text isn't a format the client can recognize — commonly seen when a provider is under temporary maintenance and returns an HTML notice page instead of the actual config.

Telling these three apart matters: connection issues call for checking your network and firewall; status-code issues call for checking update frequency and account status; parsing issues usually resolve themselves after waiting a bit and retrying, and have little to do with local settings. This article focuses on update interval and update via proxy, which mainly address the first two categories.

What Update Interval (update-interval) Actually Controls

Update interval controls how often a background scheduled task runs, typically measured in minutes. Once set, as long as the client keeps running, it will automatically re-request the subscription link at this interval, pull the latest node list, and merge it into the current config — no need to click the update button manually.

Shorter isn't better here. Most providers rate-limit requests to subscription links, and repeatedly hitting the same link in a short window can be flagged as abnormal — at best you get a temporary 429 throttle, at worst a temporary ban. A common recommendation is to set the interval above 60 minutes; for everyday use, 1440 minutes (24 hours) is a safe choice. Combined with "auto-update on launch," this keeps node info from going stale while avoiding excessive requests.

Some subscription services include a profile-update-interval field in the response header (measured in hours) to suggest a refresh cycle to the client. Clients that support reading this field will prioritize the server-provided value, even if you've manually entered a different number locally — the server's value is what actually takes effect. If you notice the interval "changes but doesn't apply," don't assume your setting is wrong — first check whether the subscription is returning this field.

Auto-Update on Launch vs. Background Scheduled Update

Clients typically offer two related but distinct toggles that are easy to confuse:

• Auto-update on launch: fires an update request immediately every time the app starts, or when you switch to a given subscription, ensuring you're using the latest node list right when you open the app.
• Background scheduled update: while the app keeps running in the background, it periodically re-fetches at the configured interval, without needing a restart. If the app is often fully closed rather than minimized, this toggle will trigger less often than expected.

Using Clash Verge Rev as an example, the typical setup path is:

1. Open the client and go to the "Profiles" management page.
2. Find the target subscription entry and click the edit icon to open its details.
3. In the "Update Interval" field, enter a number of minutes — 60 or higher is recommended.
4. Confirm "Update on launch" is enabled, then save and restart the app to verify it takes effect.

If the app stays running in the background without quitting, enabling scheduled update alone is enough; if you tend to close the app after use, turn on both toggles so update-on-launch acts as a fallback.

The "Update via Proxy" Toggle: When It's Required, and When It Backfires

This toggle determines whether the subscription update request itself is routed through your currently connected proxy node, rather than going out directly from your local network. It's easy to overlook, but it's the first thing to check when updates keep failing.

When to turn it on: your local network can't directly reach the subscription domain — for example, a workplace or campus network with access restrictions, or upstream DNS resolution being tampered with so it can't reach the provider's server. In this case, routing the update request through an already-connected proxy node bypasses the local network restriction, and updates work again.

When not to turn it on: the client currently has no working connected node, or the connected node itself is unstable and frequently drops. If you force "update via proxy" on in this situation, the update request will try to go out through an unusable node, and the request itself will fail first — the error looks identical to a network problem, which is easy to misdiagnose as a dead subscription link. The right move is to temporarily turn this toggle off, update once using a direct local-network connection to get a working node list and connect successfully, then turn the toggle back on.

A simple rule of thumb: first check whether a direct update works; if direct connection fails entirely, check whether there's a working node to route the update through instead; if neither works, the issue is most likely with the account or subscription link itself, not your local settings.

Step-by-Step Troubleshooting Checklist

Turning the above into a checklist you can follow top to bottom whenever an update fails:

1. Identify whether the error is a connection issue, a status-code issue, or a parsing issue to decide which direction to investigate.
2. Try accessing the subscription link directly in a browser or via command line to confirm the link itself is reachable, ruling out local network issues.
3. Check whether the update interval is set too short, and whether you've clicked the update button manually multiple times recently.
4. Check whether the "update via proxy" toggle state matches your current node connection status.
5. Confirm the subscription account is still valid and hasn't run out of data — provider dashboards usually show status separately.
6. If none of the above applies, wait 10–20 minutes and retry — some rate limits are temporary and clear on their own.