Vrsai

Vrsai is an x402-native service at https://api.vrsai.tech, 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. 6 endpoints listed.

Base

Offers

Offer	Endpoint	Price
Capabilities Decision Optimization Choose the lowest-cost or highest-value feasible allocation, assignment, selection, or resource mix from caller-supplied options, capacities, budgets, and eligibility rules, with independently verified feasibility evidence and solver optimality/gap information.	`/m/bz-api-vrsai-tech/v1/capabilities/decision_optimization`	0.03 USDC
Capabilities Invoice Match Match a supplier invoice against purchase orders, cumulative receipts, prior invoicing, and tolerance policy before payment approval.	`/m/bz-api-vrsai-tech/v1/capabilities/invoice_match`	0.05 USDC
Capabilities Openapi Agent Readiness Assess an OpenAPI description for autonomous-agent usability.	`/m/bz-api-vrsai-tech/v1/capabilities/openapi_agent_readiness`	0.03 USDC
Capabilities Package Install Preflight Check an exact npm or PyPI package version immediately before installation using current registry, vulnerability, malicious-package, withdrawal/deprecation, and verified provenance evidence. Returns ALLOW, REVIEW, BLOCK, or UNKNOWN with machine-readable reasons.	`/m/bz-api-vrsai-tech/v1/capabilities/package_install_preflight`	0.01 USDC
Capabilities Payout Preflight Check an outbound payout immediately before authorization to catch changed destinations, duplicate payments, amount or currency drift, and malformed payment details.	`/m/bz-api-vrsai-tech/v1/capabilities/payout_preflight`	0.05 USDC
Capabilities Sql Preflight Check PostgreSQL SQL immediately before execution to prevent destructive or unsafe database changes by AI agents and automated systems.	`/m/bz-api-vrsai-tech/v1/capabilities/sql_preflight`	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-vrsai-tech/v1/capabilities/decision_optimization')
// 402 challenge signed and settled automatically; response includes Payment-Receipt

Or inspect the challenge yourself:

curl -i https://api.meshgateway.co/m/bz-api-vrsai-tech/v1/capabilities/decision_optimization
# HTTP/1.1 402 Payment Required
# WWW-Authenticate: Payment id="…", method="evm", intent="charge", …