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Paysponge

Paysponge is an x402-native service at https://tripadvisor.x402.paysponge.com, 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. 5 endpoints listed.

Base

Offers

OfferEndpointPrice
:LocationId Details
Service: Tripadvisor (https://tripadvisor.x402.paysponge.com/api/v1/location/154943/details)
/m/bz-tripadvisor-x402-paysponge-com/api/v1/location/:locationId/details0.01 USDC
:LocationId Photos
Service: Tripadvisor (https://tripadvisor.x402.paysponge.com/api/v1/location/154943/photos)
/m/bz-tripadvisor-x402-paysponge-com/api/v1/location/:locationId/photos0.01 USDC
:LocationId Reviews
Service: Tripadvisor (https://tripadvisor.x402.paysponge.com/api/v1/location/154943/reviews)
/m/bz-tripadvisor-x402-paysponge-com/api/v1/location/:locationId/reviews0.01 USDC
Location Nearby Search
Service: Tripadvisor (https://tripadvisor.x402.paysponge.com/api/v1/location/nearby_search)
/m/bz-tripadvisor-x402-paysponge-com/api/v1/location/nearby_search0.01 USDC
Location Search
Service: Tripadvisor (https://tripadvisor.x402.paysponge.com/api/v1/location/search)
/m/bz-tripadvisor-x402-paysponge-com/api/v1/location/search0.01 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-tripadvisor-x402-paysponge-com/api/v1/location/:locationId/details')
// 402 challenge signed and settled automatically; response includes Payment-Receipt

Or inspect the challenge yourself:

curl -i https://api.meshgateway.co/m/bz-tripadvisor-x402-paysponge-com/api/v1/location/:locationId/details
# HTTP/1.1 402 Payment Required
# WWW-Authenticate: Payment id="…", method="evm", intent="charge", …