558686

558686 is an x402-native service at https://gpt55.558686.xyz, 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. 8 endpoints listed.

Base

Offers

Offer	Endpoint	Price
Tools Evm Wallet Balance Read a public EVM wallet balance on Base or Ethereum and determine whether its Base USDC balance can cover a suggested $0.001 x402 payment. Returns a coherent provider snapshot, USDC runway, shortfall, native-gas presence, and a handoff to the full funding-readiness doctor without signing, broadcasting, or handling private keys. Balance-only readiness does not prove client, signing, spend-cap, or	`/m/bz-gpt55-558686-xyz/v1/tools/evm-wallet-balance`	0.001 USDC
Tools X402 Batch Quote Inspector Inspect up to 10 public x402 endpoints in one paid request, without paying the target endpoints. Returns per-endpoint quote status, schemes, amounts, network, asset, payTo, resource metadata, and aggregate buyer-readiness warnings. This deterministic endpoint does not call an upstream model. GET variant for agents, crawlers, and wallets that prefer query parameters over a JSON body. Pay up to $0.0	`/m/bz-gpt55-558686-xyz/v1/tools/x402-batch-quote-inspector`	0.002 USDC
Tools X402 Bazaar Search Query the CDP x402 Bazaar discovery API, normalize paid resources, surface resource URL, service name, tags, scheme, network, payTo, and minimum USDC price. This deterministic endpoint does not call an upstream model. GET variant for agents, crawlers, and wallets that prefer query parameters over a JSON body. Pay up to $0.004 per request with x402 USDC on Base.	`/m/bz-gpt55-558686-xyz/v1/tools/x402-bazaar-search`	0.004 USDC
Tools X402 Discovery Price Compare Fetch up to 10 x402 discovery documents or service origins, extract paid resources, normalize USDC atomic amounts, and rank resources by price, scheme, network, tags, and service metadata. This deterministic endpoint does not call an upstream model. GET variant for agents, crawlers, and wallets that prefer query parameters over a JSON body. Pay up to $0.003 per request with x402 USDC on Base.	`/m/bz-gpt55-558686-xyz/v1/tools/x402-discovery-price-compare`	0.003 USDC
Tools X402 Mcp Integration Kit Generate a deterministic buyer integration package for an x402/MCP service: MCP remote server config, Claude Desktop-style config hints, curl discovery checks, x402 quote test commands, endpoint selection, spending caps, and verification checklist without calling an upstream model. GET variant for agents, crawlers, and wallets that prefer query parameters over a JSON body. Pay up to $0.006 per req	`/m/bz-gpt55-558686-xyz/v1/tools/x402-mcp-integration-kit`	0.006 USDC
Tools X402 Opportunity Finder Scan public x402 directories, group listings by buyer-intent category, compare price distributions, and return underserved product opportunities, candidate keywords, pricing bands, and directory positioning notes. This deterministic endpoint does not call an upstream model. GET variant for agents, crawlers, and wallets that prefer query parameters over a JSON body. Pay up to $0.009 per request wit	`/m/bz-gpt55-558686-xyz/v1/tools/x402-opportunity-finder`	0.009 USDC
Tools X402 Site Audit Fetch a public API origin and audit x402 discovery, OpenAPI, pricing, llms.txt, robots, sitemap, MCP metadata, health, endpoint counts, payment schemes, and buyer-readiness signals. This deterministic endpoint does not call an upstream model. GET variant for agents, crawlers, and wallets that prefer query parameters over a JSON body. Pay up to $0.001 per request with x402 USDC on Base.	`/m/bz-gpt55-558686-xyz/v1/tools/x402-site-audit`	0.001 USDC
V1 X402 Ping Paid x402 capability check for this GPT-5.6 Luna gateway. GET version for agents, crawlers, and wallets that prefer a simple no-body settlement proof. This endpoint settles a small x402 payment and returns service metadata without calling the upstream model.	`/m/bz-gpt55-558686-xyz/v1/x402-ping`	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-gpt55-558686-xyz/v1/tools/evm-wallet-balance')
// 402 challenge signed and settled automatically; response includes Payment-Receipt

Or inspect the challenge yourself:

curl -i https://api.meshgateway.co/m/bz-gpt55-558686-xyz/v1/tools/evm-wallet-balance
# HTTP/1.1 402 Payment Required
# WWW-Authenticate: Payment id="…", method="evm", intent="charge", …