Fronesislabs

Fronesislabs is an x402-native service at https://bazaar.fronesislabs.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
Evaluate Fast Low-latency pre-action screening for routine agent responses and tool-call decisions.	`/m/bz-bazaar-fronesislabs-com/evaluate/fast`	0.01 USDC
Evaluate Jailbreak Detect jailbreaks, prompt injection, and instruction conflicts before the agent follows them.	`/m/bz-bazaar-fronesislabs-com/evaluate/jailbreak`	0.02 USDC
Evaluate Quality Check agent outputs for quality issues, inconsistency, and behavioral drift.	`/m/bz-bazaar-fronesislabs-com/evaluate/quality`	0.03 USDC
Evaluate Safety Baseline safety screening for harmful, unsafe, or policy-violating agent outputs.	`/m/bz-bazaar-fronesislabs-com/evaluate/safety`	0.01 USDC
Evaluate Strict Higher-confidence evaluation for high-impact, sensitive, or difficult-to-reverse agent actions.	`/m/bz-bazaar-fronesislabs-com/evaluate/strict`	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-bazaar-fronesislabs-com/evaluate/fast')
// 402 challenge signed and settled automatically; response includes Payment-Receipt

Or inspect the challenge yourself:

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