DeepSeek API Key Tester

Test any AI or API key in your browser — instantly see if it's valid, and why it isn't. Nothing is stored.

Test your DeepSeek API key with the chat completions endpoint

Data verified 2026-07-13

Key format & how to get one

Prefix: sk- Example: sk-abc123... DeepSeek keys start with sk-. 1. Visit https://platform.deepseek.com/ and sign up/login 2. Go to API Keys section in your dashboard 3. Click 'Create API Key' 4. Provide a name and copy the generated key 5. Add credits to your account to use the API

How to test

  1. Copy your key from platform.deepseek.com/api_keys.
  2. Paste it above and click Test Key.
  3. Green means valid; red shows the error and fix.

Common errors

CauseFix
Invalid or revoked key.Create a new key at platform.deepseek.com/api_keys.
Insufficient balance on the account.Top up at platform.deepseek.com and retry.

DeepSeek API docs →

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