canonical: https://jentic.com/apis/44api.dev/44api # 44api VAT Validation API The 44api VAT Validation API checks VAT and tax ID numbers across 54+ countries and returns the registered company name, address, and registration status for each number. It covers all 27 EU member states through the official VIES network plus 27 or more non-EU countries, giving one consistent response shape regardless of the country checked. The API also manages an IP whitelist that controls which addresses may call your account. ## For AI agents Validate VAT and tax ID numbers across 54+ countries and return the company name, address, and registration status for each. Covers all 27 EU states via the VIES network plus 27 or more non-EU countries. ## Scope Does not handle tax calculation, VAT filing, or invoicing. Use for VAT number validation and company data lookup only. ## Capabilities - Validate a VAT or tax ID number for 54+ countries and get its current registration status - Retrieve the registered company name, address, and registration details tied to a VAT number - Check numbers across all 27 EU member states through the official VIES network in a single request - Validate 27 or more non-EU country tax IDs with the same consistent response shape - Control which IP addresses may call your account through the account IP whitelist ## Use cases ### Agent-driven VAT verification An AI agent handling supplier or customer records can validate a VAT number the moment it is entered, confirming the number is registered and pulling back the official company name and address. Because the 44api VAT Validation API returns the same response shape for every country, the agent handles an EU number checked through VIES and a non-EU number with identical parsing logic. Example prompt: Validate VAT number 69838046 for country code SI and confirm the registration status and company name returned ### Supplier onboarding checks During vendor onboarding, a finance team needs to confirm that a supplier's VAT registration is genuine before any payment is set up. The API validates the number against the official source for its country and returns the registered business name and address, so a mismatch between the claimed and registered company surfaces immediately. Coverage spans all 27 EU states plus 27 or more non-EU countries. Example prompt: Validate a supplier's VAT number for country code DE and compare the returned company name against the name on file ### EU cross-border invoicing compliance Businesses selling across EU borders must confirm a customer's VAT number is valid to apply the correct zero-rated treatment. The API checks the number through the VIES network that the EU operates for exactly this purpose and returns whether it is currently valid along with the registered company details, giving a defensible record at the time of the transaction. Example prompt: Check an EU customer VAT number through VIES and record whether it is currently registered before issuing a zero-rated invoice ## Key endpoints | Method | Path | Description | | --- | --- | --- | | POST | `/webhook/validate-vat` | Validate a VAT or tax ID number for a country and return status and company data | | POST | `/webhook/ip-whitelist` | Manage the account IP whitelist | | GET | `/webhook/core/health` | Report service availability | ## Key resources - **VAT validation** — Validate a VAT or tax ID number for a given country code and return registration status and company data - **IP whitelist** — Manage the list of IP addresses permitted to call the account - **Health** — Report service availability for monitoring before a batch of validations ## AI readiness This API is usable in Jentic One now. Its AI-readiness score against Jentic's framework shows where it stands today and where improvements would make it even easier for agents to use. - **Score:** 68 / 100 - **Maturity:** AI-Aware - **Dimensions:** - Foundational Compliance: 94 / 100 - Developer Experience & Jentic Compatibility: 64 / 100 - AI-Readiness & Agent Experience: 53 / 100 - Agent Usability: 94 / 100 - Security: 50 / 100 - AI Discoverability: 83 / 100 - **View full report:** https://jentic.com/apis/44api.dev/44api/scorecard - **How the score is calculated:** https://docs.jentic.com/reference/api-readiness-framework/overview/ - **More about the dimensions:** https://docs.jentic.com/reference/api-readiness-framework/specification/#dimensional-model-overview ### Score it yourself Every API in the directory is allowlisted, so you can re-score it with no key required. - **Score your own API:** https://jentic.com/scorecard.md - **Scoring CLI agent skill:** https://github.com/jentic/jentic-api-scorecard/blob/main/skills/jentic-api-scorecard/SKILL.md ```sh npx @jentic/api-scorecard-cli score ``` ## Why Jentic - **Setup:** Wiring the 44api VAT Validation API by hand means setting up its X-API-Key header auth and writing parsing for each country's result yourself. Through Jentic you install once, import 44api from the API Directory, store the key once, and your agent calls it. - **Permission scoping:** The VAT number and country code travel in the request body, not the URL path, so a rule bounds which operations your agent may call rather than which numbers it may check. You choose the operations it may call, so the account IP whitelist operation is not included unless you add it. - **Credential handling:** Your 44api key is stored once, encrypted, by your own Jentic One instance and injected at execution time. It never enters the agent's prompt, logs, or context. - **Discovery method:** Agents search Jentic by intent such as 'validate a VAT number' or 'look up company data from a VAT number', and Jentic returns the matching 44api operation with its input schema so the agent calls the right endpoint without reading the reference docs. ## Related APIs - **Taxamo** — Taxamo handles VAT and sales-tax calculation and settlement, where 44api focuses on validating VAT numbers. - **Clearbit** — Clearbit enriches a company with firmographic data once 44api has confirmed its VAT number. - **OpenSanctions** — OpenSanctions screens the validated company or owner against sanctions and watchlists. ## FAQ ### What authentication does the 44api VAT Validation API use? The 44api VAT Validation API authenticates with an API key sent in the X-API-Key header, as declared in its OpenAPI spec. Through Jentic the key is stored once and injected at call time, so it never appears in your agent's prompt or logs. ### Can I validate non-EU VAT and tax IDs with the 44api VAT Validation API? Yes. Alongside all 27 EU member states checked through the official VIES network, the API validates numbers for 27 or more non-EU countries, and every country returns the same response shape with registration status and company details. ### What are the rate limits for the 44api VAT Validation API? The OpenAPI spec does not state numeric rate limits for the 44api VAT Validation API. Check the vendor documentation at https://docs.44api.dev for current limits before running high-volume validations. ### How do I validate a VAT number with the 44api VAT Validation API through Jentic? Search Jentic for 'validate a VAT number', which returns the POST `/webhook/validate-vat` operation with its input schema, then call it with the VAT number and country code. To run it on your own infrastructure, install Jentic One from its GitHub repo. ### Can I limit what my agent is allowed to do with the 44api VAT Validation API? Yes. Write a rule that allows only the VAT validation operation, so the agent can check numbers and read company data but cannot touch the IP whitelist, and every call it makes is logged. The VAT number and country travel in the request body, so the rule bounds which operations run rather than which numbers are checked.