HRSandbox · bring your own key

Test “Proposal Cover 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)

Write a professional cover letter to accompany a business proposal with the following details:

Sender Name: {{sender}}
Recipient Company: {{company}}
Proposal Subject: {{subject}}{{value}}{{strengths}}

Write a concise, professional cover letter (3-4 paragraphs) that introduces the sender, references the proposal subject, highlights value, and closes with a clear call to action. The letter should feel personalized and compelling.

Return only the cover letter text, no subject line or extra commentary.

Output — will stream here

Nothing yet. Fill in variables and click Run.

Prompt slug: proposal-cover-letter

Prefer copy-paste? Back to the prompt page →