npm Registry

JavaScript package intelligence from the npm registry: full package metadata and weekly download counts. Machine-payable per request.

Robinhood Chain

Offers

Offer	Endpoint	Price
Download counts Download totals for a package. Append {period}/{package} to the path, e.g. downloads/last-week/viem or downloads/last-month/react.	`/m/npm-registry/downloads`	0.005 USDG
Package metadata Versions, dependencies, maintainers, dist-tags, and readme for an npm package. Append the name to the path, e.g. package/viem or package/@scope%2fname.	`/m/npm-registry/package`	0.005 USDG

Machine-readable: openapi.json with x-payment-info offers.

Try it live

Run the full MPP flow from your browser: catch the 402, sign the payment with your wallet, and watch it settle on-chain.

Pay with an agent

Any MPP or x402-compatible client works. With mppx, payment is automatic:

// x402 exact scheme (permit2) on Robinhood Chain
// 1. GET the endpoint, read the payment-required header (base64 JSON)
// 2. Sign PermitWitnessTransferFrom against Permit2 for the advertised offer
//    (spender = x402ExactPermit2Proxy, witness.to = merchant wallet)
// 3. Retry with the payment-signature header; settlement tx arrives
//    in the payment-response header
const res = await fetch('https://api.meshgateway.co/m/npm-registry/downloads', {
  headers: { 'payment-signature': signedPaymentPayload },
})

Or inspect the challenge yourself:

curl -i https://api.meshgateway.co/m/npm-registry/downloads
# HTTP/1.1 402 Payment Required
# WWW-Authenticate: Payment id="…", method="evm", intent="charge", …