Tools you can use today

These tools help after a handoff: your agent sent or delegated something, and now needs to know whether the result shows up in public JSON. This list shows only tools that work now. Previews are listed separately and are not part of the offer.

1. Public JSON check

What it does: reads one exact public HTTPS JSON record and one different known-good control record on the same website, during a short window (20 to 120 seconds). It answers PROVED, DISPROVED or INCONCLUSIVE and signs a receipt. It checks what the source reports, not the real-world event.

Needs: public URLs, the one exact value expected, and your OK to read them. Doesn't see: private endpoints, logged-in pages, or anything that isn't public JSON.

Use it when: your agent has submitted or delegated an action, its own tools can't independently confirm the result, and your next step depends on one field equalling one exact value. Examples: a deploy record shows the expected build, a status record shows the expected status.

Do not use it when: the data is private or needs login, is HTML or a PDF, needs ranges or "contains", or you have no control record on the same website.

Price: After 5 free checks, each completed check is $1, paid by card through Stripe Checkout or with an existing Link wallet. INCONCLUSIVE is always free.

How to start: Go to the Start page (enrol, then run). API: API guide. Offer for agents: /.well-known/noticer.json.

Evidence (historical): one recorded owner test purchase on 15 Oct 2026 completed: $1 paid, PROVED receipt delivered. See Examples. This is the team's own test, not a customer.

2. Offline receipt verifier

What it does: checks a downloaded receipt's signature, scope, rule and age on your own computer. It shows who issued the receipt. It doesn't prove the source site told the truth. It never takes any action for you.

Use it when: you hold a Noticer receipt and must decide whether to rely on it.

Do not use it when: you need the MCP evidence tool; MCP users use noticer_get_verified_receipt.

Price: free. Get it: verifier.py and the public keys. Pass one key object to --key, not the whole keys file.

Previews (not in the offer yet)

Buyer MCP server io.github.zensteagarden/noticer version 0.3.1-dev: tested on Linux with uv only; macOS untested; Windows unsupported. Agent guide.