5 Claude Skills That Should Be Illegal to Have for Free
Five prompts, five jobs people pay real money for. A contract auditor. A ghostwriter that actually sounds like you. A dev who explains every step. A money-leak detector. And a mode that stops Claude from guessing. All five run in free Claude at claude.ai. No paid plan, no setup. Paste, fill the brackets, send. One ground rule first: skills 1 and 4 are for YOUR documents, nobody else's. Strip account numbers and personal details before you paste. Claude does not need them to do the work.
1. The Bill and Contract Auditor
Most people sign things they never read and pay charges they never question. This flips that. Paste the document and Claude lists every charge and clause working against you, ranked by what each one costs you, with a read on whether it is even enforceable. Two rules. Redact account numbers, reference numbers, and anything personal before you paste, the audit works exactly the same without them. And treat the enforceability calls as a starting point for your own pushback, not legal advice. Verify before you dispute anything.
Read this bill/contract: [paste]. List every charge or clause overcharging me or not in my favor, ranked by cost, and whether each is even enforceable.2. Voice Note → Email, In Your Voice
The gap between how you talk and how you write is where most emails die. Record yourself talking it out, grab the transcript from your phone's voice memos or just dictate straight into your notes app, then paste it with a sample of your real writing. The sample is the step everyone skips, and it is the whole trick. Without it you get generic AI email. With it you get your voice, minus the rambling.
Here's a transcript of me rambling: [paste]. Rewrite it as a clear [email/post] in a natural first-person voice. Match how I write using this sample: [paste sample].3. Idea → Working App
One sentence in, working code out, plus run instructions written for someone who has never touched a terminal. Claude even previews the app right in the chat, so you can click around before you save a single file. Be honest about the scope. This builds a single-page tool, a calculator, a tracker, a converter. It is not a startup in a prompt. But the little app you have been meaning to build for a year? It ships today, free.
Build me a working single-page web app that does [describe]. Give me the full code and exact steps to run it with zero coding experience.4. Bank Statement → Money Saved
Your statement already knows where your money goes. Claude just makes it impossible to ignore. It categorizes the month, flags every recurring subscription and obvious waste, totals what you could cut, then writes the cancellation message for each one so you actually send it. Before you paste: your own statement only, and strip account numbers, your name, and balances first. The transaction lines are all it needs.
Here's last month's transactions: [paste]. Categorize my spending, flag recurring subscriptions + waste, total what I could cut, and write the cancellation message for each.5. Truth-Only Mode
The default failure mode of every AI is the confident guess. This kills it. Run it at the top of a chat and Claude has to say 'I'm not certain' when it is not, tell you how to verify, and flag any claim it cannot back up. It does not make the model magically right about everything, nothing does. It makes it honest about its confidence, and that is the difference between a research tool and a liability. I run it before anything where the answer actually matters.
From now on never guess. If you're not sure, say 'I'm not certain' and tell me how to verify. Flag any claim you can't back up. Now answer: [question].Get the next one first
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Frequently asked questions
Five copy-paste prompts that turn free Claude into a contract auditor, a ghostwriter in your voice, an app builder, a money-leak detector, and an AI that admits when it's unsure.
No, they run on free Claude. If you want the honest pay-or-don't verdict, it's here.
No, they are copy-paste. Each one is a job people pay real money for.