Write a system prompt for your AI agent
Describe your business, choose the agent's job and tone, and get a system prompt ready to paste into your AI customer service agent, with the rules that keep it honest: answer only from what it knows, never invent prices, and hand over to a person. Free.
Updated 5 November 2026
What a good system prompt covers
- Who it is
The business it speaks for, and the tone it uses.
- What it helps with
Its main job: answering questions, helping people buy, supporting customers or taking bookings.
- How it answers
Only from your own information, short as a chat, in the customer's language, one question at a time, and saying so when it doesn't know.
- What it never does
Invent prices, availability, policies or promises, plus your own rules.
- When to hand over
When a customer asks for a person or is upset, and the cases you name.
Using your prompt
- Paste it into your agent
In HeyKiko, under Settings › AI › Instructions. Any AI agent that takes a system prompt or custom instructions can use it.
- Give it the facts
A prompt says how to answer; the prices, hours and policies come from your website and documents.
- Test it with real questions
Ask what your customers ask, including the awkward ones, and adjust the prompt until the answers are right.
Questions about system prompts
Short answers before you write one.
The standing instructions an AI model reads before every conversation: who it is, what it may and may not do, and how to answer. Customers never see it.
Say who the agent is, what it helps with, how it answers, what it never does and when it hands over to a person. The generator above writes one from your details.
Yes, with no sign-up, for up to 10 prompts a day.
It's plain text, so you can paste it wherever a tool takes a system prompt or custom instructions.
Because an AI model with no rule like that fills gaps with guesses. Grounding it in your own content, and letting it say "I don't know", is what keeps answers right.
Yes. It's a starting point: edit it, add your own rules, and test it before customers see it.
No. What you type is sent to an AI model to write the prompt and isn't stored.
Keep reading
Let Kiko take the next message
Train your agent on your website today, put it on WhatsApp, Telegram and your site, and watch the first conversations come in.
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