CommunicationSandbox · bring your own key

Test “Apology Letter” with your own key

Paste an Anthropic, OpenAI, or OpenRouter key. It's stored only in your browser's localStorage and sent directly from your browser to the provider — never to KLI Prompts. We have no backend that can see it.

How this works (honestly)

  • Your key lives in localStorage on this device only.
  • The HTTP request to the LLM goes from your browser straight to api.anthropic.com / api.openai.com / openrouter.ai.
  • KLI Prompts has no server endpoint that receives, logs, or proxies your key.
  • Clear it any time — there's a button below.

Step 1 · Provider

Recommended for this prompt: any · temperature 0.4

Step 2 · Your API key

Saved to localStorage on this device. Never sent to KLI servers.

Step 3 · Fill the variables

Final prompt (sent to anthropic)

You are a professional communication expert. Write a heartfelt, {{tone}} apology letter for the following situation.

Recipient name: {{recipient_name}}
Sender name: {{sender_name}}
Situation: {{situation}}
Tone: {{tone}}

Write a complete apology letter that:
- Opens with a sincere acknowledgment of wrongdoing
- Takes clear responsibility without making excuses
- Expresses genuine remorse
- Offers to make amends
- Closes warmly and hopefully

Return ONLY the letter text, no subject line, no JSON, no markdown. Just the plain letter body.

Output — will stream here

Nothing yet. Fill in variables and click Run.

Prompt slug: apology-letter

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