Blockscout

Blockscout is an x402-native service at https://api.blockscout.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

Offer	Endpoint	Price
Addresses :Address Hash Param Access to api/v2/addresses/:address_hash. Retrieve detailed information about a specific address or contract	`/m/bz-api-blockscout-com/:chain_id/api/v2/addresses/:address_hash_param`	0.002 USDC
:Address Hash Param Transactions Access to api/v2/addresses/:address_hash/transactions. List transactions involving a specific address with to-from filtering	`/m/bz-api-blockscout-com/:chain_id/api/v2/addresses/:address_hash_param/transactions`	0.002 USDC
Smart Contracts :Address Hash Param Access to api/v2/smart-contracts/:address_hash. Retrieve detailed information about a verified smart contract	`/m/bz-api-blockscout-com/:chain_id/api/v2/smart-contracts/:address_hash_param`	0.002 USDC
Tokens :Address Hash Param Access to api/v2/tokens/:address_hash. Retrieve detailed information about a specific token	`/m/bz-api-blockscout-com/:chain_id/api/v2/tokens/:address_hash_param`	0.002 USDC
:Address Hash Param Holders Access to api/v2/tokens/:address_hash/holders. List addresses holding a specific token sorted by balance	`/m/bz-api-blockscout-com/:chain_id/api/v2/tokens/:address_hash_param/holders`	0.002 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-api-blockscout-com/:chain_id/api/v2/addresses/:address_hash_param')
// 402 challenge signed and settled automatically; response includes Payment-Receipt

Or inspect the challenge yourself:

curl -i https://api.meshgateway.co/m/bz-api-blockscout-com/:chain_id/api/v2/addresses/:address_hash_param
# HTTP/1.1 402 Payment Required
# WWW-Authenticate: Payment id="…", method="evm", intent="charge", …