Watchpost for ChatGPT

A safety net for the things ChatGPT wants to buy.

ChatGPT can already shop, browse, and link payment methods through its built-in tools. Watchpost adds an external check between the assistant and the merchant. Three pillars per purchase: merchant trust, listing scan, your rules. ChatGPT keeps doing what it does; you sleep better.

Get WatchpostHow it works
One command
npx @watchpost/mcp install
The CLI opens a browser to confirm your account and gives you the MCP server URL + token to paste into ChatGPT's "Connectors" settings. ChatGPT then calls Watchpost before completing any purchase.
Real verdicts

What it looks like with ChatGPT.

Approved11:14
etsy.comHand-poured candle, large
$24.50

Established merchant. Listing is clean. Within your daily cap. ChatGPT proceeds.

Review11:31
premium-news.exampleAnnual subscription, auto-renew
$99.00

Above your ask-me threshold and recurring. You get a push to approve or block.

Blocked10:45
trending-deals.shopMystery bundle, AI exclusive
$129.00

Domain registered three weeks ago. Listing tells the AI to ignore prior instructions. Watchpost blocks before ChatGPT gets the chance.

Setup with ChatGPT

Five minutes, no surprises.

  1. 01
    Sign up

    Email and a password. No credit card to start.

  2. 02
    Set your rules

    Caps, ask-me threshold, blocked categories. The defaults are sensible; tighten them if you want.

  3. 03
    Run the installer

    On your computer: npx @watchpost/mcp install. The CLI confirms your account and prints the MCP URL + token.

  4. 04
    Add the connector to ChatGPT

    In ChatGPT settings, open Connectors, paste the URL and token Watchpost gave you. ChatGPT will start calling watchpost_check_purchase before any payment.

  5. 05
    Test it

    Ask ChatGPT to buy something cheap from a known merchant. You'll see the verdict on your dashboard within seconds.

Frequently asked

Specific to ChatGPT.

Does this work on the free ChatGPT plan?
MCP connectors require ChatGPT Plus or above as of writing. Free-tier ChatGPT can't connect to external tools.
What if I use ChatGPT inside an Apple Intelligence flow?
If the underlying ChatGPT instance has the Watchpost connector enabled, the flow is protected. If not, the verdict isn't checked. We're working with Apple to make this clearer in upcoming OS releases.
Can I run separate rules for ChatGPT versus other agents?
Per-agent rules are post-v1. Today, your account-level rules apply to every connected agent. Each agent has its own connection token, so you can revoke ChatGPT specifically without touching anything else.
Is OpenAI training on the data Watchpost sends?
Watchpost sends listings to Anthropic for the scan, not OpenAI. OpenAI sees only what it normally sees from your conversation. We do not forward Watchpost data to OpenAI.

Switch it on for ChatGPT.

Free for 25 verdicts a month. Upgrade only when your agent gets busy.

Get WatchpostSee pricing