How to Test Anthropic API Key

A reliable key test avoids surprises later.

Minimal test sequence

• Add your key in DapperGPT.
• Send a short prompt.
• Send a longer prompt with constraints.
• Confirm normal completion and stable output.

Validate these signals

• No "invalid key" errors.
• No quota/billing blocks.
• Model response time is acceptable.
• Output format follows your instructions.

Team tip

Keep one repeatable "API smoke test" prompt so anyone can verify provider health in seconds.