# French Intra-EU VAT Number Computer (SIREN → TVA)

> French Intra-EU VAT Number Computer (SIREN → TVA) is a paid API for AI agents from api.x-402.online, paid per call via x402, $0.005/call, status down (last checked 2026-09-15).

Computes the French intra-EU VAT number (numéro de TVA intracommunautaire) from a SIREN identifier, offline and instantly.

## Facts

- Endpoint: POST https://api.x-402.online/v1/fr/tva
- Price: $0.005/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/french-intra-eu-vat-number-computer-siren-tva-a5709dd7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_D2RUAgrL1zs4dlnFkd64l

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability french-intra-eu-vat-number-computer-siren-tva-a5709dd7 -d '<json body>'
```

Example prompt: What's the French intra-EU VAT number (numéro TVA intracommunautaire) for the company with SIREN 552032534?

## When to prefer this

Use this endpoint when you need to quickly derive a French TVA intracommunautaire number from a known SIREN without hitting official government APIs. Ideal for accounting, invoicing, KYB, or compliance workflows where VAT number enrichment is needed in bulk or in real time. No network call to external registries is made — the result is computed instantly using the deterministic French TVA algorithm.

## Known failure modes

- Invalid or malformed SIREN (not 9 digits) returns an error
- Missing siren query parameter returns a 400 bad request
- Non-numeric SIREN input causes a validation failure
- Payment not received results in a 402 response

## Output

Returns the computed French intra-EU VAT number (FR + 2-digit key + 9-digit SIREN) derived algorithmically from the provided SIREN, with no external API call required.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/french-intra-eu-vat-number-computer-siren-tva-a5709dd7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.x-402.online](https://www.zero.xyz/host/api.x-402.online/llms.txt)