Americas • ISO US
Verify United States companies via API
Know Your Customer Limited verifies United States companies live from the See USA tab for details., returning company data, and registry documents, with AML screening and ongoing monitoring. Free sandbox available.
What the API returns for United States
When you create a KYB case for a United States company, Know Your Customer Limited retrieves data live from the See USA tab for details.. A single integration returns the company record, the controlling parties and individuals, the shareholders and beneficial owners, and the registry documents, with AML screening on the entity and its associated individuals built into the same case.
United States data and document availability
Know Your Customer Limited verifies companies across all 50 United States registries from one integration. Company data and registry documents are available for every United States jurisdiction; controlling parties and shareholders and beneficial owners are as follows:
| United States jurisdiction | Controlling entities & individuals | Shareholders & beneficial owners |
|---|---|---|
| Alabama | Name, Address, Role | Not available |
| Alaska | Name, Address, Role | Name, Share count, Role |
| Arizona | Name, Address, Role | Not available |
| Arkansas | Name, Address, Role | Not available |
| California | Name, Address, Role | Not available |
| Colorado | Name, Address, Role | Not available |
| Connecticut | Name, Address, Role | Not available |
| Delaware | Name, Address, Role, Phone Number | Not available |
| Florida | Name, Address, Role | Not available |
| Georgia | Name, Address, Role | Not available |
| Hawaii | Name, Address, Role | Not available |
| Idaho | Name, Address, Role | Not available |
| Illinois | Name, Address, Role | Not available |
| Indiana | Name, Address, Role | Not available |
| Iowa | Name, Address, Role | Name, Address, Role |
| Kansas | Name, Address, Role | Name, Address, Role |
| Kentucky | Name, Address, Role | Not available |
| Louisiana | Name, Address, Role, Appointed On | Not available |
| Maine | Name, Address, Role | Name, Address, Role |
| Maryland | Name, Address, Role | Name, Address, Role |
| Massachusetts | Name, Address, Role | Not available |
| Michigan | Name, Address, Role | Not available |
| Minnesota | Name, Address, Role | Name, Address, Role |
| Mississippi | Name, Address, Role | Name, Address, Role |
| Missouri | Name, Address, Role | Name, Address, Role |
| Montana | Name, Address, Role | Name, Address, Role |
| Nebraska | Name, Address, Role | Name, Address, Role |
| Nevada | Name, Address, Role | Not available |
| New Hampshire | Name, Address, Role | Name, Address, Role |
| New Jersey | Name, Address, Role | Not available |
| New Mexico | Name, Address, Role | Not available |
| New York | Name, Address, Role | Not available |
| North Carolina | Name, Address, Role | Not available |
| North Dakota | Name, Address, Role | Name, Address, Role |
| Ohio | Name, Address, Role, Appointed on | Not available |
| Oklahoma | Name, Address, Role | Not available |
| Oregon | Name, Address, Role, Appointed On | Not available |
| Pennsylvania | Name, Address, Role | Name, Address, Role |
| Rhode Island | Name, Address, Role | Not available |
| South Carolina | Name, Address, Role | Not available |
| South Dakota | Name, Address, Role | Name, Address, Role |
| Tennessee | Name, Address, Role | Not available |
| Texas | Name, Address, Role | Not available |
| Utah | Name, Address, Role | Not available |
| Vermont | Name, Address, Role | Name, Address, Role |
| Virginia | Name, Address, Role | Name, Address, Role |
| Washington | Name, Address, Role | Not available |
| West Virginia | Name, Address, Role | Name, Address, Role |
| Wisconsin | Name, Address, Role | Not available |
| Wyoming | Name, Address, Role | Name, Address, Role |
AML, sanctions, and PEP screening on the entity and its associated individuals, and ongoing live monitoring with change alerts, are available for United States as part of the same case.
How to verify a United States company via API
The following example shows the complete flow: authenticate, search the United States registry, create a KYB case, and retrieve company data and the ownership org-chart. All calls go to the sandbox base URL for testing.
The sandbox at https://api.knowyourcustomer.dev is free. Request access to get your client credentials.
# 1. Authenticate (OAuth2 client credentials)
curl -X POST https://api.knowyourcustomer.dev/connect/token \
-d "grant_type=client_credentials" \
-d "client_id=YOUR_CLIENT_ID" \
-d "client_secret=YOUR_CLIENT_SECRET" \
-d "scope=PublicApi"
# 2. Search the United States registry
curl -X POST https://api.knowyourcustomer.dev/v2/Companies/search \
-H "Authorization: Bearer $TOKEN" \
-H "Content-Type: application/json" \
-d '{"name":"JPMorgan Chase and Co","codeiso31662":"US"}'
# 3. Create a KYB case
curl -X POST https://api.knowyourcustomer.dev/v2/Companies \
-H "Authorization: Bearer $TOKEN" \
-H "Content-Type: application/json" \
-d '{"rawname":"JPMorgan Chase and Co","codeiso31662":"US"}'
# 4. Retrieve company data and status
curl https://api.knowyourcustomer.dev/v2/Companies/CASE_ID \
-H "Authorization: Bearer $TOKEN"
# 5. Get the beneficial ownership org-chart
curl https://api.knowyourcustomer.dev/v2/Companies/CASE_ID/org-chart \
-H "Authorization: Bearer $TOKEN"
Replace YOUR_CLIENT_ID and YOUR_CLIENT_SECRET with your sandbox credentials, and CASE_ID with the caseCommonId returned in step 3.
Frequently asked questions about the United States KYB API
What company data can I verify in United States?
For a United States company, the API returns the company record read live from the See USA tab for details.: the entity name, type, status, registration number, address, and registration date, along with the available registry documents. See the table above for the full United States availability.
Does the API return beneficial ownership (UBO) data for United States companies?
For United States, the See USA tab for details. does not publish shareholder or beneficial-owner data, so the API returns the company record and the controlling parties and officers rather than a shareholder or beneficial-owner list. Where you need ownership for an entity in a jurisdiction that does publish it, the recursive org-chart (GET /v2/Companies/{caseCommonId}/org-chart) resolves it. See the UBO API.
Can I retrieve official registry documents for United States companies?
The API returns the registry documents the register makes available for United States, pulled at verification time, via the documents endpoint (GET /v2/Companies/{caseCommonId}/documents).
Is there a free sandbox for testing United States company verification?
Yes. The Know Your Customer sandbox at https://api.knowyourcustomer.dev is a free, high-fidelity test environment. Request free sandbox access to start testing.
The Know Your Customer Limited API covers 147 jurisdictions worldwide, including United States. One integration, one set of credentials, one response schema across all markets. Browse all covered jurisdictions.
Related coverage: British Virgin Islands • Cayman Islands • Anguilla • Argentina • Aruba • Bahamas.
Ready to verify United States companies?
The sandbox is free and available immediately. Integrate once, cover 147 jurisdictions.