Stable unlimited proxy solution

We have an issue, we get alot of 504 / 495 / 400 errors on requests. Does anyone have an idea why? We send high volumes of http requests (on 1000s of accounts) Our current provider we dont have these issues but high fraud score. But on other suppliers we always see those errors. Any fix?

Sounds more like a provider or setup issue than just the proxies themselves. At high volume a lot of suppliers start failing with timeout or gateway errors.

Could be overloaded endpoints, bad session handling, or too much concurrency hitting the same pool at once.

Sounds interesting. What type of proxies are these – residential or datacenter? Also curious about the speed and uptime.

TNgyuen said:

We have an issue, we get alot of 504 / 495 / 400 errors on requests. Does anyone have an idea why? We send high volumes of http requests (on 1000s of accounts) Our current provider we dont have these issues but high fraud score. But on other suppliers we always see those errors. Any fix?

Click to expand...

when sending high volumes of HTTP requests, encountering a mix of
504 (Gateway Timeout), 495 (SSL Certificate Error), and 400 (Bad Request)
errors typically points to infrastructure bottlenecks or protocol-level
mismatches under load.

It looks like a mix of proxy quality + too high concurrency.
504 = timeouts, 495 = SSL issues (common with weaker providers), 400 = bad/flagged requests. Maybe try lowering parallel requests, adding retries, and checking TLS/headers vs your working provider, usually fixes most of it.

Those errors usually come from rate limiting TLS handshake failures or bad proxy quality when you scale requests across many accounts

Slow down request rate rotate higher quality IPs and fix headers sessions and TLS fingerprints otherwise most providers will keep blocking you

Usually helps to lower parallel requests, keep longer sessions per IP, add retries and check headers / TLS consistency. Scaling more gradually often fixes a big part of it.

TNgyuen said:

We have an issue, we get alot of 504 / 495 / 400 errors on requests. Does anyone have an idea why? We send high volumes of http requests (on 1000s of accounts) Our current provider we dont have these issues but high fraud score. But on other suppliers we always see those errors. Any fix?

Click to expand...

Are you using datacenter proxies? Try some simple fixes like:

• Limit concurrency per IP (don’t flood the same pool)
• Use sticky sessions (1 account = 1 IP/session)
• Keep your connection settings and headers consistent with your working setup
• Use retries with increasing delays between attempts.

If errors increase with traffic, it’s likely a capacity issue. If they occur immediately, it’s likely a connection or header mismatch. Let me know if this helps.

TNgyuen said:

We have an issue, we get alot of 504 / 495 / 400 errors on requests. Does anyone have an idea why? We send high volumes of http requests (on 1000s of accounts) Our current provider we dont have these issues but high fraud score. But on other suppliers we always see those errors. Any fix?

Click to expand...

Yeah the solution is to have an automation that check quality and connectivity before assigning a proxy to an instance of a profile.

I have experience in making such bots and the difference even at lenient settings would make you cry if you'd see it.

For example, reddit account creation bot, 70% success rate with a very rudimentary and almost brute force script for one provider(nodemaven) and 10 % for oxylabs.

Yeah let's name and shame them , it's deserved.

Don't trust any one of them, it's extremely and deeply naive to assume there's one single provider with all nodes being clean, they rotate the nodes 20 to 50 times between users lol. All of them have very bad pools and batches, if you're smart and don't wanna waste bot bandwidth and compute, check every single one before deployment. Manually sucks, but even then I'd do it.

Automated, once you implement the script and api calls which takes some knowledge(or pay someone to do it) takes like a second or so. Saves a minute, every single time.