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Bulgarian VAT Number Checksum Validator
x402
Bulgarian VAT Number Checksum Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).
Validates whether a Bulgarian VAT number passes the official checksum algorithm, without performing any live registry lookup.
Price / call$0.003
Success—
StatusUnknown
How this service works
Call when an agent needs whether a BG VAT checksum is valid. No registry lookup. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/check-vat-bg first.
Output
A boolean or structured response indicating whether the provided Bulgarian VAT number passes the official BG VAT checksum algorithm. No live registry or government database is queried — only the algorithmic checksum is evaluated.
Example use cases
Invoice validation before submission
“Before I send this invoice, can you confirm that the Bulgarian VAT number BG204514107 is structurally valid according to the checksum rules?”
E-commerce checkout BG VAT verification
“A customer entered BG999999999 as their Bulgarian VAT number during checkout — can you tell me if it's a valid checksum so I can decide whether to accept it?”
Bulk import data quality check
“I'm cleaning up a spreadsheet of European supplier VAT numbers — can you verify whether BG175074752 is a properly formatted, checksum-valid Bulgarian VAT ID?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-vat-bg?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, cheap, offline checksum validation of a Bulgarian VAT number and do not need to confirm the number is actually registered with the Bulgarian tax authority. Ideal for pre-submission validation, data cleaning, or form input verification where a registry lookup is unnecessary or too slow. Prefer the free sandbox endpoint /v1/sandbox/check-vat-bg for testing.
Side effects
- Input value is empty or missing — returns validation error
- Input exceeds 20000 characters — rejected by schema
- Malformed request body — returns 400 or similar client error
- Payment not attached or insufficient USDC — returns 402 Payment Required
- Non-string or non-BG VAT format passed — may return false validity or error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | — | JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN. |
| value | string | Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar. |
| schema | — | JSON Schema document for schema-check SKUs. Omit it on string checks. |
Tags
x402
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