# Firmbase, free: Business verification API

> Any European VAT number checked directly with VIES, with the name and address the member state knows. If VIES is down, we say so rather than calling the number invalid.

Firmbase's business verification API on its No subscription plan. It costs $0.00 per 1,000 companies. It returns 4 of the 11 key fields we check: Registered name, Tax ID, Status, Principal address.
We haven't run Firmbase through [our business verification API benchmark](https://datacircle.dev/best-business-verification-api.txt) yet.
This plan is free. We rank 821 plans for business verification APIs by price. Half the plans cost $7.895 per 1,000 companies or less.
[EuroValidate's €149 monthly plan](https://datacircle.dev/business-verification-apis/eurovalidate/149-monthly-scale-post-v1-validate/llms.txt) is the cheapest paid plan per 1,000 companies: $0.017. EuroValidate's plan covers companies in 31 countries only.
[Scoris's €19 pack](https://datacircle.dev/business-verification-apis/scoris/19-pack/llms.txt) covers any number of companies in 8 countries only. Scoris's €19 pack costs less up front than EuroValidate's €149 monthly plan.
[GovFiles](https://datacircle.dev/business-verification-apis/govfiles/top-up/llms.txt), [Didit](https://datacircle.dev/business-verification-apis/didit/top-up-from-50/llms.txt) and [CompanyData.com](https://datacircle.dev/business-verification-apis/companydata-com/249-monthly/llms.txt) are the best business verification API providers in the Datacircle benchmark for companies in any country.

- This page: https://datacircle.dev/business-verification-apis/firmbase/free
- [Business verification API: the 11 best providers compared](https://datacircle.dev/best-business-verification-api.txt)
- Get it: https://firmbase.be/en/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Request: `GET https://api.firmbase.be/v1/vat/{vat}/validate`
- API key: with the plan, on https://firmbase.be/en/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Its API docs: https://firmbase.be/en/api/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing#get-v1-vat-vat-validate
- Sold by: Firmbase (https://firmbase.be?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing)
- Checked: 2026-11-05

## In the answer

- Completeness: 36%
- Registered name: ✓
- Tax ID: ✓
- Status: ✓
- Principal address: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Name autocomplete · Search companies · Count companies by group · Batch lookup (up to 100) · Company detail · Company activities · Company addresses · Company branches · Company contacts · Company denominations · Company establishments · What this company used to be · Unified entity search · Entity by number (any kind) · VAT number lookup · Establishment detail · Establishment activities · Establishment addresses · Establishment contacts · Establishment denominations · Address-centric search · List code categories · Code table · Juridical forms · Juridical situations · Dataset metadata · NACE code info · NACE code info (versioned) · NACE code list · Belgian Official Gazette publication history of a company

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Any European VAT number checked directly with VIES, with the name and address the member state knows. If VIES is down, we say so rather than calling the number invalid.

## Data

- Freshness: 24 hours
- Countries: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden
- Keep data: no limit
- Use data: Use the API for your own product or internal work, within your plan. You may not bypass the limits, overload the service, impersonate the KBO or the National Bank, or republish the data as a competing API. Caching responses for your own users is allowed. [...] The API is for your own product or your own internal work, not for reselling requests or information. You may not share your key, sub-license it or let third parties use it, and you may not offer API responses as a service, a database or an extract to parties outside your own organisation. Showing the data to your own users inside your own product is allowed: that is what the API is for. Querying systematically in order to rebuild a copy of the register or of the annual accounts is not.

## Plan

- Pay: €0
- You get: 100 requests a day
- Enough for: 100 calls a day

## Rate limit

- Per day: 100
- Per second: 0.083
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: vat
- Method: GET
- Path: /v1/vat/{vat}/validate

## About the plan

- Plan: No subscription
- Who can get it: anyone, no card needed

## The 8 fields the plan's answer can hold

country, VAT number, valid, registered name, registered address, status, cached answer, answer source

## Firmbase's plans (11)

- [Firmbase, free](https://datacircle.dev/business-verification-apis/firmbase/free/llms.txt): $0.00 per 1,000, 36% complete, 24 hours
- [Firmbase, €9 monthly](https://datacircle.dev/business-verification-apis/firmbase/9-monthly/llms.txt): $0.405 per 1,000, 36% complete, 24 hours
- [Firmbase, €15 monthly](https://datacircle.dev/business-verification-apis/firmbase/15-monthly/llms.txt): $5.627 per 1,000, 36% complete, 24 hours
- [Firmbase, €25 monthly](https://datacircle.dev/business-verification-apis/firmbase/25-monthly/llms.txt): $9.377 per 1,000, 36% complete, 24 hours
- [Firmbase, €29 monthly](https://datacircle.dev/business-verification-apis/firmbase/29-monthly/llms.txt): $0.163 per 1,000, 36% complete, 24 hours
- [Firmbase, €35 monthly](https://datacircle.dev/business-verification-apis/firmbase/35-monthly/llms.txt): $13.129 per 1,000, 36% complete, 24 hours
- [Firmbase, €79 monthly](https://datacircle.dev/business-verification-apis/firmbase/79-monthly/llms.txt): $0.089 per 1,000, 36% complete, 24 hours
- [Firmbase, €149 yearly](https://datacircle.dev/business-verification-apis/firmbase/149-yearly/llms.txt): $4.594 per 1,000, 36% complete, 24 hours
- [Firmbase, €249 yearly](https://datacircle.dev/business-verification-apis/firmbase/249-yearly/llms.txt): $7.677 per 1,000, 36% complete, 24 hours
- [Firmbase, €349 yearly](https://datacircle.dev/business-verification-apis/firmbase/349-yearly/llms.txt): $10.76 per 1,000, 36% complete, 24 hours
- [Firmbase, contact us](https://datacircle.dev/business-verification-apis/firmbase/contact-us/llms.txt): 36% complete, 24 hours

## Firmbase's calls for this API (1)

- `GET /v1/vat/{vat}/validate`: [Firmbase, free](https://datacircle.dev/business-verification-apis/firmbase/free/llms.txt)

## Firmbase's APIs (5)

- [Firmbase: business verification API pricing, 11 plans](https://datacircle.dev/business-verification-apis/firmbase/free/llms.txt)
- [Firmbase: company enrichment API pricing, 11 plans, POST /v1/companies/batch](https://datacircle.dev/company-enrichment-apis/firmbase/free-no-subscription-post-v1-companies-batch/llms.txt)
- [Firmbase: company enrichment API pricing, 11 plans, GET /v1/companies/{number}](https://datacircle.dev/company-enrichment-apis/firmbase/free-no-subscription-get-v1-companies-number/llms.txt)
- [Firmbase: company enrichment API pricing, 11 plans, GET /v1/entities/{number}](https://datacircle.dev/company-enrichment-apis/firmbase/free-no-subscription-get-v1-entities-number/llms.txt)
- [Firmbase: company enrichment API pricing, 11 plans, GET /v1/vat/{vat}](https://datacircle.dev/company-enrichment-apis/firmbase/free-no-subscription-get-v1-vat-vat/llms.txt)
- [Firmbase: company discovery API pricing, 11 plans, GET /v1/autocomplete](https://datacircle.dev/company-discovery-apis/firmbase/free-no-subscription-get-v1-autocomplete/llms.txt)
- [Firmbase: company discovery API pricing, 11 plans, GET /v1/companies](https://datacircle.dev/company-discovery-apis/firmbase/free-no-subscription-get-v1-companies/llms.txt)
- [Firmbase: company discovery API pricing, 11 plans, GET /v1/entities/search](https://datacircle.dev/company-discovery-apis/firmbase/free-no-subscription-get-v1-entities-search/llms.txt)
- [Firmbase: company hierarchy API pricing, 9 plans](https://datacircle.dev/company-hierarchy-apis/firmbase/15-monthly/llms.txt)
- [Firmbase: people search API pricing, 9 plans, GET /v1/companies/{number}/officers](https://datacircle.dev/people-search-apis/firmbase/15-monthly-start-get-v1-companies-number-officers/llms.txt)
- [Firmbase: people search API pricing, 9 plans, GET /v1/officers](https://datacircle.dev/people-search-apis/firmbase/15-monthly-start-get-v1-officers/llms.txt)

## Firmbase: business verification API alternatives

- [IsValid, €9 monthly, Starter, GET /v0/pl/krs](https://datacircle.dev/business-verification-apis/isvalid/9-monthly-starter-get-v0-pl-krs/llms.txt): $0.034 per 1,000, 55% complete, live
- [EuroValidate, €19 monthly, Starter, GET /v1/eori/{eori_number}](https://datacircle.dev/business-verification-apis/eurovalidate/19-monthly-starter-get-v1-eori-eori-number/llms.txt): $0.043 per 1,000, 18% complete, 24 hours
- [DanskCVRAPI, DKK 599 monthly, Enterprise, GET /companies/search](https://datacircle.dev/business-verification-apis/danskcvrapi/dkk-599-monthly-enterprise-get-companies-search/llms.txt): $0.045 per 1,000, 45% complete, 1 minute
- [CBEAPI, €90 yearly](https://datacircle.dev/business-verification-apis/cbeapi/90-yearly/llms.txt): $0.111 per 1,000, 55% complete, 1 day

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-05.

- https://api.firmbase.be/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://firmbase.be/en/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://firmbase.be/en/api/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://firmbase.be/en/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://firmbase.be/en/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing