Paste a cold email. See which sentences make a claim, which ones show where it came from, and which guesses should be questions. It runs in your browser: nothing you paste leaves this page.
Sources count when the sentence has a link, or a footnote like [1] with a link at the bottom.
Your result shows up here.
These are four of the seven rules in the Receipts Standard, an open standard for sales messages written with AI. Its short version: no source, no send.
It's a pattern check, not a fact check. It spots sentences that look like claims and looks for a source next to them. It can't tell whether a claim is true or whether the link says what you say it says. That part is still the job of the person who approves the email.
Want every claim sourced before the email is written? Lead Finder is a free Claude plugin that finds companies with a link behind every fact. MachGTM writes and sends sourced emails that you approve one by one.