$1.9 Lifetime · One-time · All 20 templates

Stop AI hallucinations
in production

PromptShield is a one-time pack of 20 battle-tested anti-hallucination prompt templates for indie developers: copy, paste, and ship faster.

20 battle-tested anti-hallucination prompt templates for AI builders. Copy-paste ready · Production-tested · Zero fluff. Not a magic shield — just prompts that make your AI cite its sources or say when it is unsure.

$1.9 · One-time payment · Lifetime access
Browse free templates Get Lifetime — $1.9

Built in public · feedback welcome

You are an anti-hallucination editor. Only state what the source supports. Flag every claim it cannot verify. Never invent numbers, quotes, or sources.

Prompt Library

Copy these templates directly into your application code.

20 templates K-Beauty INCI · Gaokao-EN · Legal Q&A · Medical Triage · Web Research · Finance Guard · Code Review · Citation Audit · Support Reply · E-com Copy · Resume Check · Legal Contract · Admissions Essay · Data Guard · Social Post · Cold Email · Product Description · UX Copy · Meeting Notes · Investment Research

How it works

Three steps. No setup, no account, no API key.

1

Pick a template

Choose the guard that matches your task — legal, medical, finance, code, and more.

2

Drop in your data

Paste the text, draft, or dataset you want checked. The prompt tells the model exactly what to do.

3

Copy into your app

Paste the filled prompt into ChatGPT, Claude, or your product. Get a grounded result.

The difference one prompt makes

Without PromptShield

"This supplement cures fatigue. Studies prove it." — unsupported claim, invented proof, compliance risk.

With PromptShield

"Supports everyday energy. (Not a cure — see disclaimer.)" — claim reframed, disclaimer attached, risk removed.

Why it matters

Hallucinations are not a bug you can patch once. They are a habit of the model.

✓

One wrong fact travels far. A fabricated citation in a blog post gets cited by others before anyone checks.

✓

Confidence is not accuracy. Models state guesses with the same tone as verified facts.

✓

A good prompt is cheaper than a bad outcome. A 2-minute guard saves a retraction, a refund, or a lost client.

Pricing

Simple, transparent options for builders.

A token price that funds future template drops.

Get free anti-hallucination prompts

Join the list for free prompt tips, new templates, and the occasional deep-dive on keeping your AI honest. No spam — just practical ways to stop confident fiction.

Get Lifetime Access

Frequently asked

Will these prompts go out of date?+
The guard logic is stable; we refine wording as models change. Lifetime buyers get every update free.
Is this legal or medical advice?+
No. Every template is built to stay in "general information" and tells the model to defer to a professional. Nothing here replaces a licensed expert.
How is this different from ChatGPT Plus?+
Plus gives you a model. PromptShield gives you 20 task-specific guards that force the model to stay grounded — something the base model does not do on its own.
What do I get exactly?+
20 copy-paste prompt templates (EN + ZH), each with usage notes and worked examples. MIT licensed, yours forever.
What is your refund policy?+
14-day no-questions refund via Creem. If the pack is not useful, email us and we reverse it.
Can I use these commercially or with my team?+
Yes. The MIT license covers commercial use and team use — you may use the prompts in products you build. You may NOT resell or redistribute the prompt pack itself as your own product. Attribution is not required but appreciated.
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Built by a practitioner

PromptShield is made by Darwin — an independent AI product builder who ships real products and writes the prompts he actually uses. No agency, no fake reviews, just working tools.

See more of my work

Changelog