# CompanyVerify, free pilot, POST /v1/counterparty/evidence: Business verification API

> In one call, assemble a Companies House candidate and profile with optional GLEIF and sanctions evidence. Supply a company number for a direct lookup, or a name and optional registered postcode for candidate resolution.

CompanyVerify's business verification API on its Free pilot plan. It costs $0.00 per 1,000 companies. CompanyVerify's docs list 1 of the 11 fields on our checklist: Entity number.
You get up to 60,000 calls a month.
In [our business verification API benchmark](https://datacircle.dev/best-business-verification-api.txt), the best plan from CompanyVerify scores 94.5 out of 100.
Half of the 935 plans we rank by price cost $7.895 per 1,000 companies or less. This plan and 72 others tie for the lowest price per 1,000 companies of the 935 plans. [See how many business verification API plans are free.](https://datacircle.dev/best-business-verification-api.txt)
[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 more up front than CharityAPI's $15 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/companyverify/free-pilot-post-v1-counterparty-evidence
- [Business verification API: the 12 best providers compared](https://datacircle.dev/best-business-verification-api.txt)
- Get it: https://companyverify.uk/guide?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Request: `POST https://api.companyverify.uk/v1/counterparty/evidence`
- API key: not needed
- Its API docs: https://api.companyverify.uk/catalogue.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Sold by: CompanyVerify (https://companyverify.uk?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing)
- Checked: 2026-11-07

## In the answer

- Completeness: 9%
- Entity number: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: UK company search · UK company profile with officers · LEI lookup (GLEIF) · Entity match verdict · Sanctions screen (primary lists)

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: In one call, assemble a Companies House candidate and profile with optional GLEIF and sanctions evidence. Supply a company number for a direct lookup, or a name and optional registered postcode for candidate resolution.

## Data

- Countries: United Kingdom
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $0
- Enough for: 60,000 calls a month

## Rate limit

- Per day: 2,000
- Per second: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: Content-Type header "application/json", one of company_number or company_name. Optional: registered_postcode, include_lei, include_sanctions
- Method: POST
- Path: /v1/counterparty/evidence

## About the plan

- Plan: Free pilot
- Who can get it: anyone

## The 10 fields the plan's answer can hold

resolution status, review required, selected company number, selected candidate rank, company profile, postcode comparison, LEI candidates, sanctions screen, provenance, limitations

## CompanyVerify's plans (1)

- [CompanyVerify, free pilot, POST /v1/counterparty/evidence](https://datacircle.dev/business-verification-apis/companyverify/free-pilot-post-v1-counterparty-evidence/llms.txt): $0.00 per 1,000, 9% complete

## CompanyVerify's calls for this API (3)

- `GET /v1/lei/lookup`: [CompanyVerify, free pilot, GET /v1/lei/lookup](https://datacircle.dev/business-verification-apis/companyverify/free-pilot-get-v1-lei-lookup/llms.txt)
- `GET /v1/uk/company/search`: [CompanyVerify, free pilot, GET /v1/uk/company/search](https://datacircle.dev/business-verification-apis/companyverify/free-pilot-get-v1-uk-company-search/llms.txt)
- `POST /v1/counterparty/evidence`: [CompanyVerify, free pilot, POST /v1/counterparty/evidence](https://datacircle.dev/business-verification-apis/companyverify/free-pilot-post-v1-counterparty-evidence/llms.txt)

## CompanyVerify's APIs (2)

- [CompanyVerify: company enrichment API pricing, 1 plan](https://datacircle.dev/company-enrichment-apis/companyverify/free/llms.txt)
- [CompanyVerify: business verification API pricing, 1 plan, POST /v1/counterparty/evidence](https://datacircle.dev/business-verification-apis/companyverify/free-pilot-post-v1-counterparty-evidence/llms.txt)

## CompanyVerify: business verification API alternatives

- [INSEE, free](https://datacircle.dev/business-verification-apis/insee/free/llms.txt): $0.00 per 1,000, 45% complete, 24 hours
- [Hlidac statu, free, Zdarma, GET /api/v2/firmy/GetDetailInfo](https://datacircle.dev/business-verification-apis/hlidac-statu/free-zdarma-get-api-v2-firmy-getdetailinfo/llms.txt): $0.00 per 1,000, 27% complete
- [Scoris, free](https://datacircle.dev/business-verification-apis/scoris/free/llms.txt): $0.00 per 1,000, 18% complete, 1 week
- [CZ Agents, free](https://datacircle.dev/business-verification-apis/cz-agents/free/llms.txt): $0.00 per 1,000, 18% complete, stored

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-07.

- https://api.companyverify.uk/catalogue.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://api.companyverify.uk/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://api.companyverify.uk/telemetry-notice?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://companyverify.uk?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://companyverify.uk/guide?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing