CAC Lookup Integration Guide
Last updated Oct 7th, 2025
Overview
This page documents the Corporate Affairs Commission (CAC) lookup APIs. These are separate, independent endpoints you can call to retrieve various types of company data:
Business / Company Lookup: This is the first endpoint you'll use. It retrieves a company's basic CAC information and returns the company's CAC ID, which is required for other endpoints.
Shareholders: This endpoint returns the company's shareholder details.
Persons with Significant Control (PSC): This endpoint returns the details of persons with significant control over the company.
Secretary: This endpoint returns the company's secretary details.
Directors: This endpoint returns the company's directors.
Profile: This endpoint returns a comprehensive company profile, which combines the details from the search, shareholders, and directors endpoints.
Prerequisites
To get started, please ensure to:
- Sign up on the Mono Dashboard.
- Create an App with the product scope set to
lookupand fetch the generated Secret Key.
Request Headers
Include the following header in your request for authentication, this is important for all endpoints:
mono-sec-key(required): test_sk_xxxxxxxxxxxxxxxxxxxx
This also determines the environment you're using. For example, if you're using the sandbox environment, your key will be prefixed with test_sk and live_sk for the live (production) environment.
Lookup a Business
To retrieve CAC information pertaining to a business or company, send a GET request to the following endpoint:
Request
GET https://api.withmono.com/v3/lookup/cac?search={company_name_or_rc_number}
Request Query Parameter
search(required): Specify the name or RC number of the company you want to look up.
Include this parameter in the query string to indicate the name or RC number of the company you wish to retrieve information about.
cURL Sample Request
Request
curl -X GET \
-H "mono-sec-key: YOUR_MONO_SECRET_KEY" \
"https://api.withmono.com/v3/lookup/cac?search=company_name_or_rc_number"
Successful Response
If the lookup request is successful, you will receive the following response:
Request
{
"status": "successful",
"message": "CAC lookup successful",
"timestamp": "2024-05-07T05:38:14.059Z",
"data": [
{
"classification_id": 2,
"delisting_status": null,
"company_type_name": null,
"nature_of_business_name": null,
"id": 300075,
"active": true,
"business_commencement_date": null,
"registration_approved": true,
"approved_name": "NOMO MICROFINANCE BANK LIMITED",
"head_office_address": ", ",
"objectives": "",
"registration_date": "1993-08-10T00:00:00.000+00:00",
"classification": "company",
"branch_address": "",
"email": "",
"rc_number": "200004",
"city": "IKEJA LGA",
"lga": "",
"address": "LEKKI PHASE 1",
"state": "LAGOS"
}
]
}
Company ID
The response contains the message "CAC lookup successful" along with an array of objects representing the CAC information for the company. The "id" returned in the response is the ID of the company in the CAC database and will be used in other endpoints like the Shareholder Details endpoint and the Persons with Significant Control endpoint etc.
Classification
The "classification" field in the response indicates the type of business entity.
company: This indicates that the entity is registered as a company. This is commonly associated with corporations.
business: This indicates that the entity is registered as a business name. This is commonly associated with sole proprietorships e.g market traders, artisans.
IT: This indicates that the entity is registered as an Incorporated Trustee. This is commonly associated with NGOs and other non-profit organizations.
Persons with Significant Control
To retrieve the Persons with Significant Control details a business or company, send a GET request to the following endpoint:
Request
GET https://api.withmono.com/v3/lookup/cac/company/{id}/psc
Request Path Parameter
id(required): Provide the ID returned from the business lookup response.
Include this parameter in the URL path to specify the ID of the business or company for which you want to check persons with significant control details
cURL Sample Request
Request
curl -X GET \
-H "mono-sec-key: YOUR_MONO_SECRET_KEY" \
"https://api.withmono.com/v3/lookup/cac/company/{id}/psc"
Successful Response
If the request is successful, you will receive a response with the following data:
Request
{
"status": "successful",
"message": "CAC lookup successful",
"timestamp": "2025-08-29T12:34:56.789Z",
"data": [
{
"id": 58392011,
"surname": "OLAMIDE",
"firstname": "CHIBUZOR",
"other_name": "CIROMA",
"email": "chibuzor.olamide@example.com",
"business_email": "samuel@neem.com",
"gender": "MALE",
"former_name": null,
"city": "VICTORIA ISLAND",
"occupation": "Investor",
"corporation_name": null,
"rc_number": null,
"state": "LAGOS",
"lga": "Eti-Osa",
"form_type": "National ID",
"identity_number": "NIN123456789",
"num_shares_alloted": 250000,
"type_of_shares": "PREFERENCE",
"date_of_birth": "1988-11-02T00:00:00.000+00:00",
"status": "ACTIVE",
"date_of_appointment": "2023-07-15T09:20:30.000+00:00",
"nationality": "NIGERIA",
"address": "24 Adeola Odeku Street, Victoria Island, Lagos",
"business_address": "25, ADEMOLA BUHARI CRESCENT, WUSE 2, ABUJA, FCT, NIGERIA",
"postcode": "101241",
"street_number": "24",
"affiliates_residential_address": "24 Adeola Odeku Street, Victoria Island, Lagos",
"affiliates_psc_information": 91234,
"affiliate_type_fk": {
"id": 7543,
"name": "PSC",
"description": "PERSONS WITH SIGNIFICANT CONTROL"
},
"country_fk": {
"id": 1,
"name": "NIGERIA",
"code": "NGA"
},
"is_chairman": false
}
]
}
The response contains an array of objects containing all persons with significant control details associated with the business or company.
Lookup a Secretary
To lookup the company secretary, send a GET request to the following endpoint:
Request
GET https://api.withmono.com/v3/lookup/cac/company/{id}/secretary
Request Path Parameter
id(required): Provide the ID returned from the business lookup response.
Include this parameter in the URL path to specify the ID of the business or company for which you want to lookup the secretary details
cURL Sample Request
Request
curl -X GET \
-H "mono-sec-key: YOUR_MONO_SECRET_KEY" \
"https://api.withmono.com/v3/lookup/cac/company/{id}/secretary"
Successful Response
If the secretary lookup request is successful, you will receive the following response:
Request
{
"status": "successful",
"message": "CAC lookup successful",
"timestamp": "2024-02-16T07:45:34.130Z",
"data": [
{
"id": 19667380,
"surname": "NOMO",
"firstname": "SAMUEL",
"other_name": "OLAMIDE",
"email": "samuel@neem.com",
"business_email": "samuel@neem.com",
"phone_number": "09042658500",
"gender": "FEMALE",
"former_nationality": "",
"age": 0,
"city": "LAGOS",
"occupation": "",
"former_name": "",
"corporation_name": "NOMO TECHNOLOGIES TECHNOLOGIES",
"rc_number": "1343485",
"corporation_company": null,
"state": "LAGOS",
"pobox": null,
"accreditationnumber": "",
"is_lawyer": null,
"last_visit": 0,
"form_type": "International Passport",
"is_presenter": null,
"is_chairman": false,
"num_shares_alloted": null,
"type_of_shares": "",
"date_of_birth": null,
"status": "ACTIVE",
"date_of_termination": "2021-04-21T23:00:00.000+00:00",
"date_of_appointment": "2021-04-21T23:00:00.000+00:00",
"date_of_change_of_address": null,
"former_address": null,
"former_postal": null,
"former_surname": "",
"former_first_name": "",
"former_other_name": "",
"date_of_status_change": null,
"identity_number": "C08923468",
"identity_issue_state": null,
"other_directorship_details": null,
"portal_user_fk": null,
"affiliates_fk": null,
"process_type_fk": {
"id": 6564,
"name": "COMPANY_REGISTRATION",
"description": "Company Registration",
"amount": 1,
"type": null,
"product_id": "5252348309",
"bank_code": "29230"
},
"company": null,
"same_person_as_fk": null,
"nature_of_app_or_discharge": null,
"is_designated": null,
"end_of_appointment": null,
"appointed_by": null,
"date_of_deed_of_discharge": null,
"date_of_resolution": null,
"country_fk": {
"id": 1,
"name": "NIGERIA",
"code": "NIGERIA"
},
"country_of_residence": null,
"is_carried_over_from_name_avai": null,
"lga": null,
"corporation_registration_date": null,
"is_company_deleted": null,
"government_organisation_name": null,
"foreign_organisation_name": null,
"company_street_address": null,
"company_state": null,
"company_city": null,
"is_corporate": null,
"county_of_incorporation_fk": null,
"nationality": "NIGERIA",
"address": " NUMBER 13, VICTORIA ESTATES, LEKKI ",
"business_address": "25, ADEMOLA BUHARI CRESCENT, WUSE 2, ABUJA, FCT, NIGERIA",
"postcode": "",
"street_number": "",
"affiliates_residential_address": 345689,
"affiliates_psc_information": 12347380,
"legal_owners_of_interests": [],
"legal_owners_of_voting_rights": [],
"stock_exchange_soes": [],
"approved_for_notice_of_psc": null,
"company_address2": "",
"full_address2": "NUMBER 13, VICTORIA ESTATES, LEKKI ",
"affiliate_type_fk": {
"id": 5678,
"name": "SECRETARY_COMPANY",
"description": "SECRETARY_COMPANY"
}
}
]
}
The response contains details about the secretary(s) associated with the business or company.
Lookup the Directors
To lookup the directors of a business or company, send a GET request to the following endpoint:
Request
GET https://api.withmono.com/v3/lookup/cac/company/{id}/directors
Request Path Parameter
id(required): Provide the ID returned from the business lookup response.
Include this parameter in the URL path to specify the ID of the business or company for which you want to lookup the directors
cURL Sample Request
Request
curl -X GET \
-H "mono-sec-key: YOUR_MONO_SECRET_KEY" \
"https://api.withmono.com/v3/lookup/cac/company/{id}/directors"
Successful Response
If the directors lookup request is successful, you will receive the following response:
Request
{
"status": "successful",
"message": "CAC lookup successful",
"timestamp": "2024-02-14T13:42:07.629Z",
"data": [
{
"id": 6706910,
"surname": "SAMUEL",
"firstname": "OLAMIDE",
"other_name": "NOMO",
"email": "",
"business_email": "samuel@neem.com",
"phone_number": "",
"gender": "MALE",
"former_nationality": "",
"age": 56,
"city": "",
"occupation": "",
"former_name": "",
"corporation_name": "",
"rc_number": "",
"corporation_company": null,
"state": "LAGOS",
"pobox": null,
"accreditationnumber": "",
"is_lawyer": null,
"last_visit": 0,
"form_type": "International Passport",
"is_presenter": null,
"is_chairman": null,
"num_shares_alloted": 1,
"type_of_shares": "ORDINARY",
"date_of_birth": "1995-05-05T23:00:00.000+00:00",
"status": "ACTIVE",
"date_of_termination": null,
"date_of_appointment": null,
"date_of_change_of_address": null,
"former_address": null,
"former_postal": null,
"former_surname": "",
"former_first_name": "",
"former_other_name": "",
"date_of_status_change": null,
"identity_number": "A0345456618",
"identity_issue_state": null,
"other_directorship_details": "",
"portal_user_fk": null,
"affiliates_fk": null,
"process_type_fk": {
"id": 6564,
"name": "COMPANY_REGISTRATION",
"description": "Company Registration",
"amount": 1,
"type": null,
"product_id": "511111119",
"bank_code": "25670"
},
"company": null,
"same_person_as_fk": null,
"nature_of_app_or_discharge": null,
"is_designated": null,
"end_of_appointment": null,
"appointed_by": null,
"date_of_deed_of_discharge": null,
"date_of_resolution": null,
"country_fk": {
"id": 1,
"name": "NIGERIA",
"code": "NIGERIA"
},
"country_of_residence": null,
"is_carried_over_from_name_avai": null,
"lga": null,
"corporation_registration_date": null,
"is_company_deleted": null,
"government_organisation_name": null,
"foreign_organisation_name": null,
"company_street_address": null,
"company_state": null,
"company_city": null,
"is_corporate": null,
"county_of_incorporation_fk": null,
"nationality": null,
"address": "40, BUHARI CRESCENT GRA",
"business_address": "25, ADEMOLA BUHARI CRESCENT, WUSE 2, ABUJA, FCT, NIGERIA",
"postcode": "",
"street_number": "",
"affiliates_residential_address": null,
"affiliates_psc_information": 67364910,
"legal_owners_of_interests": [],
"legal_owners_of_voting_rights": [],
"stock_exchange_soes": [],
"approved_for_notice_of_psc": null,
"company_address2": "",
"full_address2": "39, KOLA AMODU CRESCENT MAGODA GRA, LAGOS",
"affiliate_type_fk": {
"id": 7516,
"name": "SHAREHOLDER",
"description": "SHAREHOLDER"
}
}
]
}
The response contains an array of objects detailing all directors associated with the business or company.
Lookup the full company profile
The company's profile combines information from a company search, shareholder details, and director information. You can access it by sending a GET request to the following endpoint
Request
GET https://api.withmono.com/v3/lookup/cac/profile/{rcnumber}
Request Path Parameter
rcnumber(required): Specify the RC number of the company you want to look up.
Include this parameter in the path string to indicate the RC number of the company you wish to retrieve information about.
cURL Sample Request
Request
curl -X GET \
-H "mono-sec-key: YOUR_MONO_SECRET_KEY" \
"https://api.withmono.com/v3/lookup/cac/profile/{rcnumber}"
Successful Response
If the profile lookup request is successful, you will receive the following response:
Request
{
"status": "successful",
"message": "CAC lookup successful",
"timestamp": "2025-09-18T08:49:00.542Z",
"data": {
"approved_name": "ELITE SYNERGY VENTURES",
"nature_of_business_name": null,
"registration_date": "2021-10-26T07:13:37.772Z",
"rc_number": "3333333",
"id": 7648693,
"classification": "BUSINESS_NAME",
"classification_id": 1,
"active": true,
"registration_approved": null,
"delisting_status": null,
"company_type_name": null,
"branch_address": null,
"business_commencement_date": null,
"head_office_address": null,
"objectives": null,
"city": null,
"lga": null,
"email": null,
"address": null,
"state": null,
"business_email": "samuel@neem.com",
"business_address": "25, ADEMOLA BUHARI CRESCENT, WUSE 2, ABUJA, FCT, NIGERIA",
"directors": [
{
"id": null,
"surname": "ADEKUNLE",
"firstname": "MUSA",
"other_name": "EBUKA",
"email": "info.eliteventures@gmail.com",
"gender": "MALE",
"former_name": null,
"city": null,
"occupation": null,
"rc_number": null,
"state": null,
"lga": null,
"form_type": null,
"identity_number": null,
"num_shares_alloted": null,
"type_of_shares": null,
"date_of_birth": "1985-05-15T00:00:00.000Z",
"status": "ACTIVE",
"date_of_appointment": "2021-10-26T00:00:00.000Z",
"nationality": "NIGERIA",
"address": "25, ADEMOLA BUHARI CRESCENT, WUSE 2, ABUJA, FCT, NIGERIA",
"postcode": null,
"street_number": null,
"affiliates_residential_address": "25, ADEMOLA AJAIYE CRESCENT, WUSE 2, ABUJA, FCT, NIGERIA",
"affiliates_psc_information": null,
"affiliate_type_fk": null,
"country_fk": null,
"is_chairman": null
}
],
"shareholders": [
{
"id": null,
"surname": "ADEKUNLE",
"firstname": "MUSA",
"other_name": "EBUKA",
"email": "info.eliteventures@gmail.com",
"gender": "MALE",
"former_name": null,
"city": null,
"occupation": null,
"rc_number": null,
"state": null,
"lga": null,
"form_type": null,
"identity_number": null,
"num_shares_alloted": null,
"type_of_shares": null,
"date_of_birth": "1985-05-15T00:00:00.000Z",
"status": "ACTIVE",
"date_of_appointment": "2021-10-26T00:00:00.000Z",
"nationality": "NIGERIA",
"address": "25, ADEMOLA BUHARI CRESCENT, WUSE 2, ABUJA, FCT, NIGERIA",
"postcode": null,
"street_number": null,
"affiliates_residential_address": "25, ADEMOLA BUHARI CRESCENT, WUSE 2, ABUJA, FCT, NIGERIA",
"affiliates_psc_information": null,
"affiliate_type_fk": null,
"country_fk": null,
"is_chairman": null
}
]
}
}
The response contains a comprehensive company profile, which combines the details from the shareholders, PSC, secretary, and directors endpoints.