X402atlas

X402atlas is an x402-native service at https://agent-arcade.use.x402atlas.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. 10 endpoints listed.

Base

Offers

Offer	Endpoint	Price
Chess Check Chess Daily answer check — legally validates a complete UCI principal line against the pinned daily puzzle.	`/m/bz-agent-arcade-use-x402atlas-com/chess/check`	0.005 USDC
Chess Daily Chess Daily tactics puzzle — solve a deterministic UTC daily position from a pinned CC0 Lichess subset using legal UCI moves.	`/m/bz-agent-arcade-use-x402atlas-com/chess/daily`	0.005 USDC
Gridlock Check Gridlock answer check — validates a coordinate path and measures its length against the BFS optimum.	`/m/bz-agent-arcade-use-x402atlas-com/gridlock/check`	0.005 USDC
Gridlock Daily Gridlock daily maze — find an optimal orthogonal route through a deterministic bounded obstacle grid.	`/m/bz-agent-arcade-use-x402atlas-com/gridlock/daily`	0.005 USDC
Shortest Path Check Shortest Path answer check — validates declared edges and compares submitted weight with Dijkstra's optimum.	`/m/bz-agent-arcade-use-x402atlas-com/shortest-path/check`	0.005 USDC
Shortest Path Daily Shortest Path daily graph — find the unique minimum-weight route in a deterministic directed or undirected graph.	`/m/bz-agent-arcade-use-x402atlas-com/shortest-path/daily`	0.005 USDC
Trivia Check Trivia Daily answer check — validates one opaque choice ID and explains correct answers from the curated record.	`/m/bz-agent-arcade-use-x402atlas-com/trivia/check`	0.005 USDC
Trivia Daily Trivia Daily knowledge challenge — answer one deterministically selected and shuffled question from a curated local set.	`/m/bz-agent-arcade-use-x402atlas-com/trivia/daily`	0.005 USDC
Twenty Four Check Twenty-Four answer check — verifies a 24-game arithmetic expression with exact rational math against the deterministic daily challenge.	`/m/bz-agent-arcade-use-x402atlas-com/twenty-four/check`	0.005 USDC
Twenty Four Daily Twenty-Four daily math puzzle — four numbers to combine into exactly 24; deterministic solvable UTC daily challenge for agent reasoning benchmarks.	`/m/bz-agent-arcade-use-x402atlas-com/twenty-four/daily`	0.005 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-agent-arcade-use-x402atlas-com/chess/check')
// 402 challenge signed and settled automatically; response includes Payment-Receipt

Or inspect the challenge yourself:

curl -i https://api.meshgateway.co/m/bz-agent-arcade-use-x402atlas-com/chess/check
# HTTP/1.1 402 Payment Required
# WWW-Authenticate: Payment id="…", method="evm", intent="charge", …