Polym

Polym is an x402-native service at https://api.polym.uk, 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. 4 endpoints listed.

Base

Offers

Offer	Endpoint	Price
Market Authenticity :ConditionId Factual per-market Polymarket taker-flow concentration, price-band structure, book compatibility and resolution base-rate context; never a fraud verdict or prediction.	`/m/bz-api-polym-uk/market-authenticity/:conditionId`	0.05 USDC
Resolution Risk UMA resolution dispute and flip base rates by category and criterion clarity; descriptive historical compatibility, not a market-specific forecast.	`/m/bz-api-polym-uk/resolution-risk`	0.05 USDC
Resolution Watchlist Live Polymarket watchlist ranked by structural UMA resolution base-rate signals, with flip risk kept as a separate conditional axis.	`/m/bz-api-polym-uk/resolution-watchlist`	0.05 USDC
Screener Ranked Polymarket market-flow screener with factual concentration and liquidity-compatibility fields for the observed window.	`/m/bz-api-polym-uk/screener`	0.05 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-polym-uk/market-authenticity/:conditionId')
// 402 challenge signed and settled automatically; response includes Payment-Receipt

Or inspect the challenge yourself:

curl -i https://api.meshgateway.co/m/bz-api-polym-uk/market-authenticity/:conditionId
# HTTP/1.1 402 Payment Required
# WWW-Authenticate: Payment id="…", method="evm", intent="charge", …