Longwatch

Longwatch is an x402-native service at https://longwatch.dev, indexed from the x402 Bazaar (Coinbase's public discovery directory). It charges callers itself in USDC on Base and is paid directly at its own wallet; Monex Protocol passes your request and payment headers through untouched. 2 endpoints listed.

Base

Offers

Offer	Endpoint	Price
Check One-shot look at a source. No watch is created. Types: url (current page text), rss (latest feed items), price (current USD price), edgar (recent SEC filings — 8-K item codes decoded, Form 4 insider trades parsed into who bought/sold, how much, and whether scheduled). To keep watching, POST /watches with the same body.	`/m/bz-longwatch-dev/check`	0.001 USDC
:Id Alerts Poll a watch for alerts since a cursor. Pass since={last seq you saw}; the response carries a new cursor. Polling keeps the watch alive.	`/m/bz-longwatch-dev/watches/:id/alerts`	0.001 USDC

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.

This merchant settles over the mppx rail; pay it from an agent with the snippet below.

Pay with an agent

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

import { Mppx, evm } from 'mppx/client'
import { privateKeyToAccount } from 'viem/accounts'

const mppx = Mppx.create({
  methods: [evm({
    account: privateKeyToAccount(process.env.KEY),
    currencies: [evm.assets.base.USDC],
  })],
})

const res = await mppx.fetch('https://api.meshgateway.co/m/bz-longwatch-dev/check')
// 402 challenge signed and settled automatically; response includes Payment-Receipt

Or inspect the challenge yourself:

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