# Know Your Customer, contact us, Fixed Plan: Business verification API

> The Know Your Customer Limited KYB API does this live from the official company registries in 150+ jurisdictions, returns the original registry documents, builds a recursive beneficial-ownership org-chart, and runs AML and sanctions screening on the company and the people behind it, all through one REST API with a free developer sandbox.

Know Your Customer's business verification API on its Fixed Plan. It returns 2 of the 11 key fields we check: Registered name, Entity number.
We rank 654 plans by price. [Scoris's €99 monthly plan](https://datacircle.dev/business-verification-apis/scoris/99-monthly/llms.txt) is the cheapest paid plan per 1,000 companies: as little as $0.021. Scoris's plan covers companies in 8 countries only. Scoris's €99 monthly plan covers up to 5,184,000 companies a month at no extra cost.
[Scoris's €19 pack](https://datacircle.dev/business-verification-apis/scoris/19-pack/llms.txt) covers any number of companies. Scoris's €19 pack costs less to start than Scoris's €99 monthly plan.
[INSEE](https://datacircle.dev/business-verification-apis/insee/free/llms.txt), [CZ Agents](https://datacircle.dev/business-verification-apis/cz-agents/free/llms.txt) and [ARES](https://datacircle.dev/business-verification-apis/ares/free/llms.txt) are the best business verification API providers in our benchmark.

- This page: https://datacircle.dev/business-verification-apis/know-your-customer/contact-us-fixed-plan
- [Best business verification API in 2026: pricing compared](https://datacircle.dev/best-business-verification-api.txt)
- Get it: https://knowyourcustomer.com/developers/access/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Request: `POST https://api.knowyourcustomer.com/v2/Companies/search`
- API key: with the plan, on https://knowyourcustomer.com/developers/access/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Its API docs: https://knowyourcustomer.com/developers/guide/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing#step-1-search-for-the-company
- Sold by: Know Your Customer (https://knowyourcustomer.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing)
- Checked: 2026-10-31

## In the answer

- Completeness: 18%
- Registered name: ✓
- Entity number: ✓

## Price

- Billing: contact

## Aggregators

- Aggregators: none

## In their words

- Their pitch: The Know Your Customer Limited KYB API does this live from the official company registries in 150+ jurisdictions, returns the original registry documents, builds a recursive beneficial-ownership org-chart, and runs AML and sanctions screening on the company and the people behind it, all through one REST API with a free developer sandbox.

## Data

- Freshness: live
- Keep data: no limit
- Use data: The Customer may use the Solution only in the ordinary course of its business operations, for the benefit of the Customer and only in accordance with the terms of this Agreement, including the Service Specifications. [...] The Customer agrees to use the KYC Reports solely for the internal use and benefit of the Customer’s organisation and not for re-sale or other transfer or disposition to, or use by, or for the benefit of, any other entity or person. [...] The Customer agrees to comply with any additional terms and conditions which are applicable to third party services accessed via the Solution, including any terms which govern the use of in any information made available by such third-party service providers.

## Plan

- Expires: unused KYC Case Enquiries in that quarter, if any, based upon the Case Package purchased by the Customer, which unused KYC Case Enquiries will be rolled over into the next quarter

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: codeiso31662, query. Optional: datasource
- Method: POST
- Path: /v2/Companies/search

## About the plan

- Plan: Fixed Plan
- Who can get it: a Customer: the company that executes an Order Form or pays the Fees set out in it

## The 2 fields the plan's answer can hold

registered name, registration number

## Know Your Customer's plans (2)

- [Know Your Customer, contact us, Fixed Plan](https://datacircle.dev/business-verification-apis/know-your-customer/contact-us-fixed-plan/llms.txt): 18% complete, live
- [Know Your Customer, contact us, Flexible Plan](https://datacircle.dev/business-verification-apis/know-your-customer/contact-us-flexible-plan/llms.txt): 18% complete, live

## Know Your Customer's calls (1)

- `POST /v2/Companies/search`: [Know Your Customer, contact us, Fixed Plan](https://datacircle.dev/business-verification-apis/know-your-customer/contact-us-fixed-plan/llms.txt)

## Know Your Customer's APIs (1)

- [Know Your Customer: business verification API pricing, 2 plans](https://datacircle.dev/business-verification-apis/know-your-customer/contact-us-fixed-plan/llms.txt)

## Know Your Customer: business verification API alternatives

- [Kausate, contact us, Enterprise, POST /v2/companies/search](https://datacircle.dev/business-verification-apis/kausate/contact-us-enterprise-post-v2-companies-search/llms.txt): 36% complete, live
- [Signzy, contact us, Postpaid, POST /api/v3/us/canada-kyb-fetch](https://datacircle.dev/business-verification-apis/signzy/contact-us-postpaid-post-api-v3-us-canada-kyb-fetch/llms.txt): 27% complete, live
- [Parse, contact us, Enterprise, GET /scraper/319be902-3423-483d-8fa9-6c9adaca1260/search_entities](https://datacircle.dev/business-verification-apis/parse/contact-us-enterprise-get-scraper-319be902-3423-483d-8fa9-6c9adaca1260-search-entities/llms.txt): 18% complete, live
- [Palm, contact us, Custom pricing, POST /v1/business/verification](https://datacircle.dev/business-verification-apis/palm/contact-us-custom-pricing-post-v1-business-verification/llms.txt): 9% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-31.

- https://knowyourcustomer.com/developers/access/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://knowyourcustomer.com/developers/api-reference/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://knowyourcustomer.com/developers/data-dictionary/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://knowyourcustomer.com/developers/faq/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://knowyourcustomer.com/developers/guide/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://knowyourcustomer.com/developers/kyb-api/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://knowyourcustomer.com/developers/llms-full.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://knowyourcustomer.com/developers/sandbox/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://knowyourcustomer.com/general-terms-conditions/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing