# Transparent Data, contact us, Get your API, POST /{key}/add, TD - REGON JSON: Company enrichment API

> Our API REGON gives you immediate access to the entire database, allowing you to conduct quick business intelligence - confirm the REGON number, verify the company's PKD numbers (Polish SIC/NACE codes), and check whether a Polish civil partnership exists.

Transparent Data's company enrichment API on its Get your API plan. It returns 3 of the 13 key fields we check: Type and status, Headquarters, Phones.
We haven't run Transparent Data through [our company enrichment API benchmark](https://datacircle.dev/best-company-enrichment-api.txt) yet.
Transparent Data gives this plan's price on request. We rank 1,542 plans for company enrichment APIs by price. Half the plans cost $7.96 per 1,000 companies or less.
[Extruct's $49 monthly plan](https://datacircle.dev/company-enrichment-apis/extruct/49-monthly/llms.txt) is the cheapest paid plan per 1,000 companies. Extruct's company enrichment API costs nothing beyond the plan price.
[CNPJ API's R$99 monthly plan (/bulk-cnpj)](https://datacircle.dev/company-enrichment-apis/cnpj-api/r-99-monthly-pro-post-bulk-cnpj/llms.txt) covers any number of companies in Brazil only. CNPJ API's R$99 monthly plan costs less up front than Extruct's $49 monthly plan.
[GLEIF](https://datacircle.dev/company-enrichment-apis/gleif/free/llms.txt), [SEC EDGAR](https://datacircle.dev/company-enrichment-apis/sec-edgar/free/llms.txt) and [GetProspect](https://datacircle.dev/company-enrichment-apis/getprospect/49-monthly-starter-post-v2-companies-enrich/llms.txt) are the best company enrichment API providers in the Datacircle benchmark for companies in any country.

- This page: https://datacircle.dev/company-enrichment-apis/transparent-data/contact-us-get-your-api-post-key-add-td-regon-json
- [Company enrichment API: 130+ providers compared](https://datacircle.dev/best-company-enrichment-api.txt)
- Get it: https://transparentdata.pl/en/api-company-information-poland?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- Request: `POST https://api.transparentdata.pl/{key}/add`, TD - REGON JSON
- API key: with the plan, on https://transparentdata.pl/en/api-company-information-poland?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- Its API docs: https://apidoc.transparentdata.pl/dataintegrator.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- Sold by: Transparent Data (https://transparentdata.pl?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 23%
- Type and status: ✓
- Headquarters: ✓
- Phones: ✓

## Price

- Billing: contact

## Aggregators

- Aggregators: none

## In their words

- Their pitch: Our API REGON gives you immediate access to the entire database, allowing you to conduct quick business intelligence - confirm the REGON number, verify the company's PKD numbers (Polish SIC/NACE codes), and check whether a Polish civil partnership exists.

## Data

- Freshness: live
- Countries: Poland
- Keep data: no API terms
- Use data: no API terms

## Speed

- Answer: by polling

## The call

- You send: source "regon", method "data", one of params.nip or params.regon. Optional: params.timeout
- Method: POST
- Path: /{key}/add

## About the plan

- Plan: Get your API
- Who can get it: anyone who sends its contact form: an offer and test access follow

## The 38 fields the plan's answer can hold

last update date, REGON number, NIP, KRS number, legal form, ownership form, financing form, company name, short name, owner name, status, NIP status, registration date, business start date, suspension date, resumption date, closure date, deletion date, bankruptcy date, registered address, registering authority, register type, register number, founding authority, PKD version, main PKD code, other PKD codes, main PKD description, other PKD descriptions, phone, fax, email, website URL, entry type, local units, civil partnership, number of partners, number of local units

## Transparent Data's plans (1)

- [Transparent Data, contact us, Get your API, POST /{key}/add, TD - REGON JSON](https://datacircle.dev/company-enrichment-apis/transparent-data/contact-us-get-your-api-post-key-add-td-regon-json/llms.txt): 23% complete, live

## Transparent Data's calls for this API (5)

- `POST /{key}/add`, TD - CEIDG JSON: [Transparent Data, contact us, Get your API, POST /{key}/add, TD - CEIDG JSON](https://datacircle.dev/company-enrichment-apis/transparent-data/contact-us-get-your-api-post-key-add-td-ceidg-json/llms.txt)
- `POST /{key}/add`, TD - KRS CEIDG REGON JSON: [Transparent Data, contact us, Get your API, POST /{key}/add, TD - KRS CEIDG REGON JSON](https://datacircle.dev/company-enrichment-apis/transparent-data/contact-us-get-your-api-post-key-add-td-krs-ceidg-regon-json/llms.txt)
- `POST /{key}/add`, TD - Pełny odpis KRS JSON 2.0: [Transparent Data, contact us, Get your API, POST /{key}/add, TD - Pełny odpis KRS JSON 2.0](https://datacircle.dev/company-enrichment-apis/transparent-data/contact-us-get-your-api-post-key-add-td-pe-ny-odpis-krs-json-2-0/llms.txt)
- `POST /{key}/add`, TD - Raport Prześwietl JSON: [Transparent Data, contact us, Get your API, POST /{key}/add, TD - Raport Prześwietl JSON](https://datacircle.dev/company-enrichment-apis/transparent-data/contact-us-get-your-api-post-key-add-td-raport-przeswietl-json/llms.txt)
- `POST /{key}/add`, TD - REGON JSON: [Transparent Data, contact us, Get your API, POST /{key}/add, TD - REGON JSON](https://datacircle.dev/company-enrichment-apis/transparent-data/contact-us-get-your-api-post-key-add-td-regon-json/llms.txt)

## Transparent Data's APIs (3)

- [Transparent Data: business verification API pricing, 1 plan](https://datacircle.dev/business-verification-apis/transparent-data/contact-us/llms.txt)
- [Transparent Data: company hierarchy API pricing, 1 plan](https://datacircle.dev/company-hierarchy-apis/transparent-data/contact-us/llms.txt)
- [Transparent Data: company enrichment API pricing, 1 plan, POST /{key}/add, TD - REGON JSON](https://datacircle.dev/company-enrichment-apis/transparent-data/contact-us-get-your-api-post-key-add-td-regon-json/llms.txt)

## Transparent Data: company enrichment API alternatives

- [SerpKite, contact us](https://datacircle.dev/company-enrichment-apis/serpkite/contact-us/llms.txt): 23% complete, live
- [ReefAPI, contact us, Custom, POST /google-maps/v1/place/by-id](https://datacircle.dev/company-enrichment-apis/reefapi/contact-us-custom-post-google-maps-v1-place-by-id/llms.txt): 23% complete, live
- [PrismCrawl, contact us](https://datacircle.dev/company-enrichment-apis/prismcrawl/contact-us/llms.txt): 23% complete, live
- [ValueSERP, contact us, Enterprise, GET /search, Google Map Place Details](https://datacircle.dev/company-enrichment-apis/valueserp/contact-us-enterprise-get-search-google-map-place-details/llms.txt): 23% 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 2026-11-04.

- https://apidoc.transparentdata.pl/dataintegrator.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- https://transparentdata.pl/en?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- https://transparentdata.pl/en/api-company-information-poland?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- https://transparentdata.pl/en/api-company-information-poland/regon?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing