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apikit

Test any LLM API key in seconds

Paste a key, list your accessible models, benchmark latency, and copy a snippet. Works with 17 providers. No signup.

?
We'll detect the provider from the key shape.

Stateless proxy — keys never logged, stored, or persisted. What happens to your key →

Stateless

Keys never persist. The proxy forwards once and forgets.

Latency-aware

p50 / p95 / p99 from a 5-ping benchmark, per provider.

Snippet-first

cURL, Python, Node fetch, axios — copy and ship.

About

APIKit is a developer toolkit for working with LLM APIs.

APIKit is a free, open-source web toolkit for software developers integrating Large Language Model (LLM) APIs. Paste a key from OpenAI, Anthropic (Claude), Google Gemini, Groq, Mistral, or any of 12 other providers, and APIKit verifies it works, lists every model the key can call, benchmarks request latency, and generates copy-paste code snippets. Beyond the tester, the kit ships a bulk tester, a cross-provider comparison, a streaming Playground, a webhook-signature validator, and a rate-limit calculator. The proxy is stateless — no key is ever logged or stored.

Providers

Pick a provider, paste a key, ship.

FAQ

What APIKit is — and isn't.

What is APIKit?
APIKit is a free, open-source developer toolkit for testing Large Language Model (LLM) API keys. Paste a key from OpenAI, Anthropic, Google Gemini, Groq, Mistral, Cohere, DeepSeek, xAI, Perplexity, Together AI, Fireworks AI, OpenRouter, Azure OpenAI, AWS Bedrock, Hugging Face, Replicate, or a local Ollama host, and APIKit verifies the key works, lists every model it can call, benchmarks request latency, and generates ready-to-use cURL, Python, and Node.js snippets.
What does APIKit do with my API key?
Nothing — beyond forwarding it once to the upstream provider so we can read the response. The proxy is stateless: keys are never logged, stored, or persisted. There is no database, no analytics on key values, and no third-party scripts. The full code is open source on GitHub.
Which LLM providers does APIKit support?
OpenAI, Anthropic (Claude), Google Gemini, Mistral, Cohere, Groq, DeepSeek, xAI (Grok), Perplexity, Together AI, Fireworks AI, OpenRouter, Azure OpenAI, AWS Bedrock, Hugging Face, Replicate, and Ollama (local). Adding a new provider takes about 30 minutes — see the contributing guide.
Do I need to sign up?
No. APIKit is free and requires no account, email, or signup. Just paste a key and test.
Can APIKit do more than just test keys?
Yes — there's a bulk tester (CSV export), a side-by-side provider comparison, a streaming Playground for real prompts, a webhook-signature validator (OpenAI + Anthropic), a rate-limit calculator, a live provider status board, and Postman / Insomnia / Bruno collection exports per provider. The whole thing is a kit, not just a tester.
Can I run APIKit myself?
Yes. The codebase is MIT-licensed and runs on any Node.js host or Vercel. Clone the repo and follow the README.

Guides

Practical, opinionated, no fluff.

All guides