Business ID Check

Validate EU and UK VAT numbers, Australian and New Zealand business numbers and other tax identifiers, one at a time or in batches, and see what changed since the last check.

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Business ID Check validates business and tax identifiers. Each identifier is first checked offline for layout and check digits, per country. EU VAT numbers are then looked up in the European Commission VIES service, which returns whether the number is registered and, where the member state provides it, the registered name and address. Australian ABNs, New Zealand NZBNs and UK VAT numbers are looked up in their official registers when the operator has configured access to them; otherwise the result says it is an offline check only.

Checks can be run for a single identifier or for a batch pasted as a list or read from a CSV file at a public URL. Every result is kept with a timestamp, so checking the same number again shows what changed, for example a VAT number that has stopped being valid or a changed registered name. When a member state registry is down, the result is "retry later", never "invalid".

Example prompts

Is DE136695976 a valid VAT number? Give me the registered name.
Check these supplier VAT numbers and tell me which ones are not valid: https://example.com/suppliers.csv
Re-check ATU13585627 and tell me if anything changed since last time.

Add it to Claude

  1. In Claude, open Settings, then Connectors, then Add custom connector.
  2. Enter the URL https://bizid.tidybutton.com/mcp and save.
  3. Choose Connect. A sign-in page asks for your email address and sends a six digit code. No password is needed.

Plans

Free

$0
  • 25 checks per month
  • Batches of up to 10 identifiers
  • Check history with change detection
  • Hosted report page

Pro

$9 per month
  • 2,000 checks per month
  • Batches of up to 1,000 identifiers
  • CSV export of batch results
  • White-label report without the Tidy Button footer

Details on the pricing page.