API Key Tester
Validate your API keys instantly — secure, fast, and private
15
APIs Available
0
Tested This Session
3
Categories
Secure
Keys Never Stored
All (15)
AI Models (7)
Image Generation (2)
Social & Platforms (6)
Test History
Results from your current session — not persisted
No tests yet

Try testing an API key — results will appear here

About API Key Tester
How it works, security, and frequently asked questions
Your Keys Are Safe

API keys are sent to our local proxy server solely to make the test API call (avoiding browser CORS restrictions). Keys are never stored, logged, cached, or transmitted to any third party. Each key is used for a single validation request and immediately discarded.

How It Works
Three simple steps to validate any API key
1
Paste Your Key
Enter your API key or access token in the provider's card
2
We Test It
A lightweight API call is made to verify the key works
3
See Results
Get instant feedback — valid, invalid, expired, or rate limited
Frequently Asked Questions
Is it safe to enter my API keys here?
Yes. Your keys are sent to the local Express server only to avoid CORS browser restrictions. The server makes a single test API call, returns the result, and the key is never stored, logged, or sent anywhere else. The entire app is open-source — you can verify this yourself.
What API providers are supported?
We currently support 15 providers across 3 categories: AI Models (OpenAI, Anthropic Claude, Google Gemini, Mistral, DeepSeek, Groq, Cohere), Image Generation (Leonardo AI, FAL AI), and Social & Platforms (Facebook, YouTube, LinkedIn, TikTok, Pinterest, Stripe).
Why did my test fail?
Common reasons include: invalid or revoked key, expired access token, insufficient credits or quota, rate limiting, or the API service being temporarily unavailable. The error message returned will indicate the specific issue.
Does testing consume my API credits?
We use the smallest possible request for each API (e.g., max_tokens: 5 for LLMs, minimal test payloads). The cost is negligible — typically fractions of a cent per test. Some endpoints like Leonardo's /me or Stripe's /balance are completely free.
Is test history saved permanently?
No. Test history is stored only in browser memory for your current session. When you close or refresh the page, all history is gone. We never persist any test data or API keys.