Fix the DeepSeek "server busy" error.

The "DeepSeek server busy" message — sometimes shown as "The server is busy. Please try again later." or a 503 response — is a recurring DeepSeek-side congestion issue that's been frequent throughout 2025 and into 2026, especially during peak hours. The error doesn't mean your API key is broken, your account is over quota, or your Reduz extension is misconfigured. It means DeepSeek's infrastructure is currently rejecting new requests for the model you're using. The fastest fix is to wait briefly, retry with backoff, or switch to a different provider in Reduz while DeepSeek recovers — your summarization workflow doesn't need to wait for DeepSeek's capacity to come back.

Check these first

• A DeepSeek-side congestion event — known recurring pattern in 2025-2026, especially around model launches and peak Asia-Pacific hours.
• The specific model you're using (DeepSeek V4 Flash, DeepSeek V4 Pro, etc.) is over capacity while others might be fine.
• You're hitting an endpoint during a partial outage that DeepSeek hasn't yet posted to status.deepseek.com.
• A long source (PDF, transcript) makes the request slower to process and easier to reject under load.
• Aggressive retries from prior failed attempts have made your client throttle worse.

Fix it in this order

1. 1

   Check status.deepseek.com

   Open status.deepseek.com in a new tab. If there's an active incident, waiting is the right move. DeepSeek often acknowledges incidents within 5-10 minutes of the first report.

2. 2

   Wait 60 seconds, then retry with a smaller request

   Server-busy errors usually clear quickly during normal congestion. Wait a minute, then retry with a shorter source — a selected paragraph instead of the full PDF — to validate that the provider is back online.

3. 3

   Try a different DeepSeek model

   If DeepSeek V4 Flash is busy, DeepSeek V4 Pro or a different variant may have capacity. In Reduz settings under DeepSeek, switch the active model and retry.

4. 4

   Verify your API key and balance

   Open platform.deepseek.com and confirm your API key is active and your account has usable balance. A near-zero balance or an expired key can surface as "server busy" on some account states.

5. 5

   Switch to another provider in Reduz

   If DeepSeek stays unreachable for more than a few minutes, switch Reduz to OpenAI, Anthropic Claude, Google Gemini, or xAI Grok. The same source — article, PDF, YouTube — runs through a different provider and your workflow keeps moving.

6. 6

   Return to DeepSeek when the incident clears

   Check status.deepseek.com periodically. Once green, switch Reduz back if cost matters — DeepSeek API pricing is competitive for daily-volume summarization.

Diagnosis

Provider congestion, not your key

Server-busy errors come from DeepSeek's upstream API, not from your API key, your account, or your Reduz configuration. Confirm by checking status.deepseek.com.

Time-of-day pattern

The issue is more frequent during peak hours (Asia-Pacific business hours overlap with global late-night testing). If you're hitting it consistently at the same time, time-shifting heavy work to off-peak helps.

Model-specific

A busy DeepSeek V4 Flash doesn't necessarily mean DeepSeek V4 Pro is busy too. Try a sibling model before changing providers.

Not a Reduz error

If the same source summarizes successfully through OpenAI or Claude in Reduz, the issue is DeepSeek-side. Reduz's provider test in extension settings can confirm the route is configured correctly.

Keep your source, change the provider

DeepSeek's server-busy errors aren't something a client can fix — the request has to wait for DeepSeek's infrastructure. What Reduz lets you do is keep summarizing through a different provider while DeepSeek recovers. Switch the active provider in extension settings to OpenAI, Anthropic Claude, Google Gemini, or xAI Grok, and the same source runs through a different model. DeepSeek's pricing is competitive for daily-volume summarization (often cents per long PDF), which is why it's worth keeping in your provider rotation. Switch back when status.deepseek.com is green. Hosted Free in Reduz also gives you a fallback path that doesn't depend on any of your BYOK keys at all.

Frequently asked questions