Tax & FinanceSandbox · bring your own key

Test “Invoice Follow Up Writer” 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

Anthropic API key

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

Model

Temperature

Step 3 · Fill the variables

Reminder*

Invoice Number*

Client Name*

Amount*

Due Date*

Sender Name*

Final prompt (sent to anthropic)

You are writing a {{reminder}} invoice follow-up email.

Details:
- Invoice Number: {{invoice_number}}
- Client Name: {{client_name}}
- Amount: {{amount}}
- Due Date: {{due_date}}
- Sender: {{sender_name}}

Write a professional, polite but firm follow-up email. Requirements:
- Start with "Subject:" line
- Be friendly but clear about the outstanding payment
- Mention the invoice number and amount
- Offer to resend the invoice if needed
- Keep body under 150 words
- Sign off from {{sender_name}}

Output ONLY the email, no extra commentary.

Output — will stream here

Nothing yet. Fill in variables and click Run.

Prompt slug: invoice-follow-up-writer

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