Payments · x402 · early usage

EU VAT number validation against the official VIES service: valid or invalid, registere…

by agosint.shveik.dev · discovered, not yet claimed by its owner · updated 2026-10-13

30d calls3

30d payers2

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

EU VAT number validation against the official VIES service: valid or invalid, registered name and address, an optional check of the name you expect and, if you give your own VAT number, a VIES consultation number to keep as audit evidence. Norwegian numbers are checked against the Norwegian VAT register. Use when: onboarding an EU supplier or customer, or before paying an invoice.

Tags: bazaar

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-13

Input example from Bazaar metadata

{
  "expect_name": "ČEZ",
  "vat": "CZ45274649"
}

Output example

{
  "address": "Duhová 1…",
  "attribution": "Result o…",
  "checked_at": "2026-10-…",
  "country": "CZ",
  "name": "ČEZ, a.…",
  "name_match": "match",
  "note": "The resu…",
  "number": "45274649",
  "receipt": {},
  "schema": "agosint.…",
  "source": "vies",
  "valid": true
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/54676.json for the price and payment options.
Pay. Call GET https://agosint.shveik.dev/x402/vat. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, Solana, Polygon, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.015 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Solana, Polygon
Demand: 3 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.015	0xbBa594F5549392DF7A8182049291b605948F5F86	120s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.015	7wboEQdg5fVrh88sAzPPLhmfqmnMNr82BW7KHYBEZo8q	120s
exact	Polygon eip155:137	USDC	$0.015	0x5893209222F2C959Eb5D4C6CD2828b06845e57BE	120s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xbBa594F5549392DF7A8182049291b605948F5F86",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "15000",
    "amountUsd": 0.015,
    "maxTimeoutSeconds": 120
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "7wboEQdg5fVrh88sAzPPLhmfqmnMNr82BW7KHYBEZo8q",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "15000",
    "amountUsd": 0.015,
    "maxTimeoutSeconds": 120
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0x5893209222F2C959Eb5D4C6CD2828b06845e57BE",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "15000",
    "amountUsd": 0.015,
    "maxTimeoutSeconds": 120
  }
]

Schemas

Output schema (JSON Schema)

{
  "example": {
    "address": "Duhová 1…",
    "attribution": "Result o…",
    "checked_at": "2026-10-…",
    "country": "CZ",
    "name": "ČEZ, a.…",
    "name_match": "match",
    "note": "The resu…",
    "number": "45274649",
    "receipt": {},
    "schema": "agosint.…",
    "source": "vies",
    "valid": true
  },
  "type": "json"
}

Example shape — generated from the schema, not a captured live response

{
  "address": "Duhová 1…",
  "attribution": "Result o…",
  "checked_at": "2026-10-…",
  "country": "CZ",
  "name": "ČEZ, a.…",
  "name_match": "match",
  "note": "The resu…",
  "number": "45274649",
  "receipt": {},
  "schema": "agosint.…",
  "source": "vies",
  "valid": true
}

Examples

curl

curl "https://agosint.shveik.dev/x402/vat"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://agosint.shveik.dev/x402/vat");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://agosint.shveik.dev/x402/vat")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: agosint.shveik.dev
Endpoint: https://agosint.shveik.dev/x402/vat
Machine-readable: /resources/54676.json