X402tap

X402tap is an x402-native service at https://x402tap.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. 12 endpoints listed.

Base

Offers

Offer	Endpoint	Price
Api Crypto Price Look up current price, 24h change, and market cap for one or more cryptocurrencies	`/m/bz-x402tap-com/api/crypto-price`	0.001 USDC
Api Crypto Trending Get the top trending cryptocurrencies right now, ranked by search interest	`/m/bz-x402tap-com/api/crypto-trending`	0.001 USDC
Api Defi Chains Rank blockchains by total DeFi value locked (TVL) across all protocols	`/m/bz-x402tap-com/api/defi-chains`	0.002 USDC
Api Gas Price Current gas price and EIP-1559 fee estimate for a chain (base, ethereum, polygon, arbitrum, optimism)	`/m/bz-x402tap-com/api/gas-price`	0.001 USDC
Api Insights Trend insights for a topic, based on real Wikipedia page-view volume and momentum. Premium tier adds relatedTrends: other Wikipedia article titles matching the same search terms (title-similarity, not a curated semantic-relevance ranking). Not literal search/social trend data — see the response's `source` field.	`/m/bz-x402tap-com/api/insights`	0.001 USDC
Api Kalshi Markets Search or list open Kalshi prediction markets (regulated US event contracts)	`/m/bz-x402tap-com/api/kalshi-markets`	0.003 USDC
Api Ping Heartbeat endpoint billed via a batch-settlement payment channel	`/m/bz-x402tap-com/api/ping`	0.001 USDC
Api Polymarket Markets Search or list active Polymarket prediction markets, ranked by 24h volume	`/m/bz-x402tap-com/api/polymarket-markets`	0.003 USDC
Api Prediction Arb Find prediction-market questions priced differently on Polymarket vs. Kalshi — a cross-platform divergence signal built from data no single-platform competitor has	`/m/bz-x402tap-com/api/prediction-arb`	0.005 USDC
Api Wallet Balance Native and (optional) ERC-20 token balance for a wallet address across major EVM chains (base, ethereum, polygon, arbitrum, optimism)	`/m/bz-x402tap-com/api/wallet-balance`	0.002 USDC
Api Weather Live current weather conditions for any city, sourced from Open-Meteo	`/m/bz-x402tap-com/api/weather`	0.001 USDC
Api Web Search Real-time web search (via Exa) — ranked results with title, URL, published date, author, and relevance score for a query	`/m/bz-x402tap-com/api/web-search`	0.003 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-x402tap-com/api/crypto-price')
// 402 challenge signed and settled automatically; response includes Payment-Receipt

Or inspect the challenge yourself:

curl -i https://api.meshgateway.co/m/bz-x402tap-com/api/crypto-price
# HTTP/1.1 402 Payment Required
# WWW-Authenticate: Payment id="…", method="evm", intent="charge", …