Counterparty and Company Data API

API ID 14630

Verify EU VAT numbers, LEIs and UK companies, and get normalized SEC EDGAR financials and ratios for US-listed companies. Data comes from official sources: European Commission VIES, GLEIF, UK Companies House and the SEC.

API Documentation

Endpoints

Request
Check one company against EU VIES, GLEIF and UK Companies House in a single call and get one verdict (verified, review, failed or incomplete) with warnings such as name mismatches, lapsed LEIs or overdue UK filings. Give at least one of vatNumber, lei or ukCompanyNumber.
Endpoint ID: 37606
GET https://zylalabs.com/api/14630/counterparty+and+company+data+api/37606/verify+counterparty
INPUT PARAMETERS

Verify Counterparty — Endpoint Features

Object Description
name Optional Company name as you know it, used to detect name mismatches
vatNumber Optional EU VAT number with its country prefix, for example IE6388047V
lei Optional 20-character Legal Entity Identifier, for example 2138002P5RNKC5W2JZ46
ukCompanyNumber Optional UK Companies House number, for example 00445790
reference Optional Your own identifier, echoed back in the response

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

name
vatNumber
lei
ukCompanyNumber
reference
API EXAMPLE RESPONSE
JSON
{
    "reference": null,
    "input": {
        "name": "Tesco PLC",
        "vatNumber": null,
        "lei": "2138002P5RNKC5W2JZ46",
        "ukCompanyNumber": "00445790"
    },
    "verdict": "verified",
    "resolvedName": "Tesco PLC",
    "warnings": [],
    "checks": {
        "lei": {
            "source": "gleif",
            "status": "valid",
            "lei": "2138002P5RNKC5W2JZ46",
            "name": "TESCO PLC",
            "entityStatus": "ACTIVE",
            "registrationStatus": "ISSUED",
            "jurisdiction": "GB",
            "country": "GB",
            "address": "TESCO HOUSE, SHIRE PARK, KESTREL WAY, WELWYN GARDEN CITY, AL7 1GA, GB",
            "nextRenewalDate": "2027-01-10T00:00:00Z"
        },
        "ukCompany": {
            "source": "companies_house",
            "companyNumber": "00445790",
            "status": "valid",
            "name": "TESCO PLC",
            "companyStatus": "active",
            "companyType": "plc",
            "incorporatedOn": "1947-11-27",
            "address": "Tesco House, Shire Park, Kestrel Way, Welwyn Garden City, AL7 1GA, United Kingdom",
            "sicCodes": [
                "47110"
            ],
            "flags": []
        }
    },
    "checkedAt": "2026-10-31T22:37:36.518Z"
}
Verify Counterparty — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14630/counterparty+and+company+data+api/37606/verify+counterparty?name=Tesco PLC&lei=2138002P5RNKC5W2JZ46&ukCompanyNumber=00445790' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Validate one EU VAT number against the European Commission VIES service and return the registered name and address.
Endpoint ID: 37607
GET https://zylalabs.com/api/14630/counterparty+and+company+data+api/37607/validate+eu+vat+number
INPUT PARAMETERS

Validate EU VAT Number — Endpoint Features

Object Description
vatNumber Required EU VAT number with its country prefix, for example IE6388047V

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

vatNumber
API EXAMPLE RESPONSE
JSON
{
    "source": "vies",
    "vatNumber": "IE6388047V",
    "status": "valid",
    "name": "GOOGLE IRELAND LIMITED",
    "address": "3RD FLOOR, GORDON HOUSE, BARROW STREET, DUBLIN 4",
    "checkedAt": "2026-10-31T22:24:09.839Z"
}
Validate EU VAT Number — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14630/counterparty+and+company+data+api/37607/validate+eu+vat+number?vatNumber=IE6388047V' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Look up one Legal Entity Identifier in the GLEIF database and return the entity name, status, jurisdiction and address.
Endpoint ID: 37608
GET https://zylalabs.com/api/14630/counterparty+and+company+data+api/37608/lookup+lei
INPUT PARAMETERS

Lookup LEI — Endpoint Features

Object Description
lei Required 20-character Legal Entity Identifier, for example HWUPKR0MPOU8FGXBT394

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

lei
API EXAMPLE RESPONSE
JSON
{
    "source": "gleif",
    "status": "valid",
    "lei": "HWUPKR0MPOU8FGXBT394",
    "name": "Apple Inc.",
    "entityStatus": "ACTIVE",
    "registrationStatus": "ISSUED",
    "jurisdiction": "US-CA",
    "country": "US",
    "address": "C/O C T Corporation System, 330 N. Brand Blvd, Suite 700, Glendale, 91203, US",
    "nextRenewalDate": "2027-03-08T17:27:20Z"
}
Lookup LEI — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14630/counterparty+and+company+data+api/37608/lookup+lei?lei=HWUPKR0MPOU8FGXBT394' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Look up one UK company by its Companies House number and return its name, status, type, incorporation date, address and SIC codes.
Endpoint ID: 37609
GET https://zylalabs.com/api/14630/counterparty+and+company+data+api/37609/lookup+uk+company
INPUT PARAMETERS

Lookup UK Company — Endpoint Features

Object Description
companyNumber Required UK Companies House number, for example 00445790 or SC123456

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

companyNumber
API EXAMPLE RESPONSE
JSON
{
    "source": "companies_house",
    "companyNumber": "00445790",
    "status": "valid",
    "name": "TESCO PLC",
    "companyStatus": "active",
    "companyType": "plc",
    "incorporatedOn": "1947-11-27",
    "address": "Tesco House, Shire Park, Kestrel Way, Welwyn Garden City, AL7 1GA, United Kingdom",
    "sicCodes": [
        "47110"
    ],
    "flags": []
}
Lookup UK Company — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14630/counterparty+and+company+data+api/37609/lookup+uk+company?companyNumber=00445790' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Get normalized annual financials and key ratios for a US-listed company from SEC EDGAR XBRL filings, by ticker or CIK.
Endpoint ID: 37610
GET https://zylalabs.com/api/14630/counterparty+and+company+data+api/37610/get+sec+financials
INPUT PARAMETERS

Get SEC Financials — Endpoint Features

Object Description
company Required Stock ticker such as MSFT, or numeric SEC CIK such as 789019
periods Optional Number of annual periods to return, from 1 to 10 (default 4).

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

company
periods
API EXAMPLE RESPONSE
JSON
{
    "status": "ok",
    "cik": "0000789019",
    "ticker": "MSFT",
    "name": "MICROSOFT CORPORATION",
    "currency": "USD",
    "metrics": {
        "revenue": {
            "tag": "RevenueFromContractWithCustomerExcludingAssessedTax",
            "annual": [
                {
                    "periodStart": "2025-07-01",
                    "periodEnd": "2026-06-30",
                    "value": 331839000000,
                    "form": "10-K",
                    "filed": "2026-07-29",
                    "accession": "0001193125-26-323660"
                },
                {
                    "periodStart": "2024-07-01",
                    "periodEnd": "2025-06-30",
                    "value": 281724000000,
                    "form": "10-K",
                    "filed": "2026-07-29",
                    "accession": "0001193125-26-323660"
                }
            ]
        },
        "netIncome": {
            "tag": "NetIncomeLoss",
            "annual": [
                {
                    "periodStart": "2025-07-01",
                    "periodEnd": "2026-06-30",
                    "value": 133749000000,
                    "form": "10-K",
                    "filed": "2026-07-29",
                    "accession": "0001193125-26-323660"
                },
                {
                    "periodStart": "2024-07-01",
                    "periodEnd": "2025-06-30",
                    "value": 101832000000,
                    "form": "10-K",
                    "filed": "2026-07-29",
                    "accession": "0001193125-26-323660"
                }
            ]
        },
        "totalAssets": {
            "tag": "Assets",
            "latest": {
                "periodEnd": "2026-09-30",
                "value": 779403000000,
                "form": "10-Q",
                "filed": "2026-10-28",
                "accession": "0001193125-26-436133"
            },
            "annual": [
                {
                    "periodEnd": "2026-06-30",
                    "value": 758376000000,
                    "form": "10-K",
                    "filed": "2026-07-29",
                    "accession": "0001193125-26-323660"
                },
                {
                    "periodEnd": "2025-06-30",
                    "value": 619003000000,
                    "form": "10-K",
                    "filed": "2026-07-29",
                    "accession": "0001193125-26-323660"
                }
            ]
        },
        "equity": {
            "tag": "StockholdersEquity",
            "latest": {
                "periodEnd": "2026-09-30",
                "value": 470509000000,
                "form": "10-Q",
                "filed": "2026-10-28",
                "accession": "0001193125-26-436133"
            },
            "annual": [
                {
                    "periodEnd": "2026-06-30",
                    "value": 442387000000,
                    "form": "10-K",
                    "filed": "2026-07-29",
                    "accession": "0001193125-26-323660"
                },
                {
                    "periodEnd": "2025-06-30",
                    "value": 343479000000,
                    "form": "10-K",
                    "filed": "2026-07-29",
                    "accession": "0001193125-26-323660"
                }
            ]
        }
    },
    "ratios": {
        "periodEnd": "2026-06-30",
        "netMargin": 0.4031,
        "operatingMargin": 0.4678,
        "revenueGrowthYoY": 0.1779,
        "currentRatio": 1.2303,
        "liabilitiesToEquity": 0.7143,
        "returnOnEquity": 0.3023,
        "returnOnAssets": 0.1764
    },
    "source": "SEC EDGAR XBRL (us-gaap)",
    "retrievedAt": "2026-10-31T22:37:39.814Z"
}
Get SEC Financials — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14630/counterparty+and+company+data+api/37610/get+sec+financials?company=MSFT&periods=4' --header 'Authorization: Bearer YOUR_API_KEY' 


    

API Access Key & Authentication

After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the Counterparty and Company Data API simply include your bearer token in the Authorization header.

Headers
Header Description
Authorization Required Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.

No long-term commitment. Upgrade, downgrade, or cancel anytime. Free Trial includes up to 50 requests.

Starts at
$10,000/Year


  • Custom Volume
  • Custom Rate Limit
  • Specialized Customer Support
  • Real-Time API Monitoring

Overview

Verify EU VAT numbers, LEIs and UK companies, and get normalized SEC EDGAR financials and ratios for US-listed companies. Data comes from official sources: European Commission VIES, GLEIF, UK Companies House and the SEC.

Counterparty and Company Data API FAQs

Only official public sources: the European Commission VIES service for VAT numbers, GLEIF for LEIs, UK Companies House for UK companies, and SEC EDGAR XBRL filings for US financials.

The response returns status source_unavailable instead of a false invalid result, so you can retry later. Failed lookups are never cached.

Yes. The company parameter accepts either a ticker such as MSFT or a numeric CIK such as 789019.

General FAQs

To obtain your API key, first sign in to your account and navigate to the API you want to use. From the API's Pricing section, choose a plan and complete the subscription process. Once subscribed, return to the API page and you will see your API Access Key displayed at the top of the documentation page. You can use this key to authenticate your requests.

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No, the free trial is available only once, so we recommend using it on the API that interests you the most. Most of our APIs offer a free trial, but some may not include this option.

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