keyprobe

Validate LLM API keys and probe which capabilities are accessible — from the terminal.

Supports Anthropic, OpenAI, Google Gemini, Mistral, Groq, Cohere, Together AI, Perplexity, DeepSeek, xAI, Hugging Face, and Replicate.

Install

go install github.com/datumbrain/keyprobe@latest

Or build from source:

git clone https://github.com/datumbrain/keyprobe
cd keyprobe
go build -o keyprobe .

Usage

keyprobe <api-key> [flags]

Provider is auto-detected from the key prefix. Use a --<provider> flag to override.

keyprobe sk-ant-api03-...       # Anthropic (auto-detected)
keyprobe sk-proj-...            # OpenAI (auto-detected)
keyprobe AIzaSy...              # Gemini (auto-detected)

keyprobe --anthropic <key>
keyprobe --openai <key>
keyprobe --gemini <key>
keyprobe --mistral <key>
keyprobe --groq <key>
keyprobe --cohere <key>
keyprobe --together <key>
keyprobe --perplexity <key>
keyprobe --deepseek <key>
keyprobe --xai <key>
keyprobe --huggingface <key>
keyprobe --replicate <key>

Output

CLI (default)

Provider:  Anthropic
Status:    ✓ VALID
Tested:    claude-haiku-4-5-20251001 (used for validation)

Capabilities:
  ✓  Messages API (chat)          Send and receive chat messages
  ✓  Streaming                    Stream tokens in real-time
  ✓  Claude Sonnet 4 access       Access to claude-sonnet-4-20250514
  ✗  Claude Opus 4 access         Access to claude-opus-4-20250514
  ✓  Claude Code (CLI)            Run `claude` CLI — requires Sonnet 4 or Opus 4 access
  ✓  Batch API                    Asynchronous large-scale message processing
  ✓  Files API (beta)             Upload and manage files for use in messages

JSON

keyprobe --output json <key>

{
  "provider": "Anthropic",
  "valid": true,
  "model": "claude-haiku-4-5-20251001 (used for validation)",
  "capabilities": [
    { "name": "Messages API (chat)", "available": true, "description": "Send and receive chat messages" },
    { "name": "Streaming",           "available": true, "description": "Stream tokens in real-time" }
  ]
}

Exit codes

Code	Meaning
0	Key is valid
1	Key is invalid or an error occurred

Supported providers

Provider	Auto-detected prefix
Anthropic	sk-ant-
OpenAI	sk-, sk-proj-
Google Gemini	AIzaSy
Groq	gsk_
Replicate	r8_
Hugging Face	hf_
xAI	xai-
Perplexity	pplx-
Together AI	together-, tgr_
Mistral	32-char key
DeepSeek	64-char key
Cohere	sk-cohere- or 40-char key

License

MIT