Get the wallet

Weigh Station

Free, and it checks any paid service before you pay it. Before your agent pays, it pulls in here and we check that the load matches the paperwork: we compare the real price and the wallet that gets paid against the service’s public listing. Checking costs nothing: we read the service’s price quote without paying it, and we don’t charge you.

Try a check Monitoring for sellers

Add it to your agent

Checking is free. It works from a coding agent in your terminal or from a chat app through the TOLLkit connector.

Coding agents

Claude Code, Codex, Cursor and 75+ more. Paste into your terminal:

npx skills add UltraStarz/tollkit-skills

Chat apps

Claude, ChatGPT and others. Add the TOLLkit connector; the tools are find_service and check_service.

Connect to your AI

Four men around a large beam balance at the New York gold assay office in 1917, with gold ingots on both pans.
Weighing gold ingots at the New York assay office, 1917. The bars had to match their papers before anyone paid for them.
A man at a glass-cased precision balance at the U.S. National Bureau of Standards, a box of reference weights beside it.
A Rueprecht balance at the U.S. National Bureau of Standards, used to check weights against the reference.

What it does

Find a paid tool
Describe the job (“product price lookup”, “weather forecast”). You get matching services from Coinbase’s public x402 index, each checked live.
Check before paying
For any x402 address: the live price, the network, and the wallet the money goes to. If that wallet differs from the public listing, you get a clear warning.
Neutral
Results are ordered by whether a service answered with a live price, then by how many different wallets have paid it. No paid placement, and TOLLkit’s own tools get no boost.

Try it in your browser

Both are free and need no key. They open the raw results your agent would read.

Describe the job first, for example “weather forecast”.

Or open the example: Find tools for “product price lookup” →

Enter the service’s full address, starting with https://.

Or open the example: Check one service before paying →

A row of small gold ingots from 1850, each stamped by the California State Assay Office with its weight and fineness.
Gold rush ingots, 1850, each stamped by the State Assay Office of California with what it weighed and how pure it was.

For sellers: monitoring

We check your endpoint every 15 minutes and send a signed webhook when something changes.

$5

per endpoint, per 30 days. Paid in USDC. Nothing renews by itself.

An engineer at a control desk weighing a 500-pound stainless steel standard hung from a load cell comparator.
Randall Schoonover weighing 500 lb stainless steel standards on the load cell comparator he invented, National Bureau of Standards.
Webhook events
EventWhen it is sent
DownAfter two failed checks in a row. Once, not every 15 minutes.
Back upWhen it recovers.
Wrong walletIf your quote starts asking buyers to pay a wallet that isn’t yours.
Price changedWhen the amount you quote changes.
ExpiringThree days before your 30 days end.
Public recordState and 30-day uptime anyone can look up. Never your webhook.

  1. Prepare (free). We read the wallet your endpoint asks buyers to pay.

    curl -s -X POST https://extract.tollkit.dev/weigh/prepare \
  -H 'content-type: application/json' \
  -d '{"url":"https://your-api.com/endpoint","webhookUrl":"https://your-app.com/hooks/weigh"}'

  2. Sign the returned message with that same wallet. Free, moves no money, and proves the endpoint is yours.

  3. Pay $5: POST the same fields plus signature to /weigh/subscribe with any x402 client. A bad signature or wallet mismatch is refused and never charged.

Look up any endpoint’s record: GET https://extract.tollkit.dev/weigh/status?url=…

Questions

Does checking cost anything or pay the service?

No. We send one unpaid request and read the price it quotes. Nothing is ever paid.

Can a seller pay to rank higher?

No. Monitoring buys alerts and a status record. It never changes what the checks report or where a service ranks.

Does it cover services that aren’t TOLLkit’s?

Yes. Any x402 service. TOLLkit’s own tools are checked and ranked by the same rules.

What does the wrong-wallet warning mean?

The service’s live price quote asks buyers to pay a different wallet from the one in its public listing. Confirm the recipient before paying.