Three checks, one second.
Every time your AI agent tries to spend money, Watchpost runs three checks at the same time. Each one looks at a different angle of the purchase. The strictest answer wins.
Each verdict comes from three independent checks.
Merchant trust
Is this seller legitimate?
We score every merchant on a 0 to 100 scale. Half the score comes from network history: how often Watchpost users approve, dispute, or refund their purchases. Three-tenths comes from public signals like domain age and email setup. The rest comes from our verified-merchant program.
Listing scan
Is the listing trying to manipulate the AI?
Hidden Unicode characters, prompt-injection patterns, recurring-billing language smuggled into a one-off purchase, drip-pricing tricks. Mechanical pre-checks always run. If they don't already settle the question, Claude reads the rest looking for AI-targeted manipulation.
Your rules
Does it match what you'd want?
Caps per purchase, per day, per month. Categories you've blocked. An ask-me-first threshold above which we always notify you. Recurring charges that need explicit permission. Defaults are sensible. Change anything, anytime.
About a second, start to finish.
- 01Your AI sends us the purchase
The merchant, product, and amount come over. We clean up the domain so we can recognize the seller, then look them up.
- 02All three checks run at once
Trust score, listing scan, and your rules are all evaluated in parallel.
- 03Verdict returned
approve, review, or block, with the reason in plain English.
- 04If review: you get a push
Tap allow or block on your phone or laptop. Your agent waits for the answer.
- 05Outcome closes the loop
Whether the purchase went through is logged. Future trust scores get smarter.
Three steps, five minutes.
Sign up
Email and a password. No credit card to start. You'll land on a dashboard with sensible defaults already set.
Set your rules
Caps per purchase, day, and month. An ask-me threshold for anything above your usual range. Categories you don't buy.
Connect your AI
If you use Claude Desktop, ChatGPT, or Cursor, point them at Watchpost from your dashboard and you're done. If you build your own AI tools, run the command below — it walks you through linking your assistant to your account.
npx @watchpost/mcp installReady to switch it on?
Free for 25 verdicts a month. Upgrade only when your agent gets busy.