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High performance airtime/data topup API for Nigerian networks Airtel, Glo, 9Mobile and MTN

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Cowrie Integrated Systems Airtime API

High performance airtime/data topup API and network agnostic logical PINs for Nigerian networks Airtel, Glo, 9Mobile and MTN

Cowrie Integrated Systems Limited is an NCC licensed Value Added Service provider of telecommunication products and services. Our Airtime REST API enables developers and service providers to dispense airtime/data plans/logical PINs from their applications. Send a request to [email protected] to signup for an account.

This repository documents the Airtime REST API and contains bindings for the following languages/platforms

To start using the API immeadiately, download the code samples for your chosen platform. The remainder of this document provides the specification for the API and describes how it is implemented.

API Structure

The airtime API is based on a HTTP/REST architecture. API clients issue HTTP GET requests with parameters specified in the query string. API responses use standard HTTP response codes with messages encoded in JSON format.

API Security

Security for the API is enforced through a combination of SSL and HMAC256 signatures. API requests are only accepted over HTTPS.

Request Authentication

API client requests are authenticated and authorized using a supplied ClientId and ClientKey. For every request, the API client must include the ClientId and sign the request using the ClientKey.

Computing the Signature

The algorithm used to compute the signature is described as follows

  1. Generate a nonce (it can be any unique string)
  2. Concatenate the nonce and the query string including the question mark "?" {nonce}?net={net}&msisdn={msisdn}&amount={amount}&channel={channel}&xref={xref}
  3. Convert the base64 encoded ClientKey to bytes
  4. Instantiate a SHA256 object from the ClientKey bytes
  5. Compute the SHA256 hash of the concatenated nonce and query string. The result yields the signature. Convert the signature to base64 format
  6. Apply the ClientId, Signature and Nonce as HTTP headers

API Methods

Name Description
Balance Get airtime account balance and discount
Credit Credit an amount airtime to a phone number on network
Data Credit a data plan to a phone number on network
Check Get the details of an airtime transaction using a unique identifier
AllocateSingle Allocate a single voucher worth an amount

Balance Request

Request URL
https://api.cowriesys.com/airtime/Balance

Request Headers 
ClientId: [email protected] 
Signature: TAP2kgjhhodYUcawFIwsn2GSxjoyVvWWQDZMhHuMFFM= 
Nonce: 20151110202513869

Balance Response

A successful request will return the following JSON encoded response

HTTP 200 OK

{
    balance: 100000,
    discount: 4
}

Credit Request

Request URL
https://api.cowriesys.com/airtime/Credit?net=AIR&msisdn=2348124661601&amount=100&xref=7734c7da7687442

Request Headers 
ClientId: [email protected] 
Signature: TAP2kgjhhodYUcawFIwsn2GSxjoyVvWWQDZMhHuMFFM= 
Nonce: 20151110202513869

Credit Response

A successful request will return the following JSON encoded response

HTTP 200 OK

{
    id: "1253CBF19F431784E610",
    xref: "7734c7da7687442",
    message: "OK"
}

Data Request

Request URL
https://api.cowriesys.com/data/Credit?net=AIR&msisdn=2348124661601&amount=100&xref=7734c7da7687442

Request Headers 
ClientId: [email protected] 
Signature: TAP2kgjhhodYUcawFIwsn2GSxjoyVvWWQDZMhHuMFFM= 
Nonce: 20151110202513869

Data Response

A successful request will return the following JSON encoded response

HTTP 200 OK

{
    id: "1253CBF19F431784E610",
    net: "AIR",
    msisdn: "2348124661601",  
    amount: 100,  
    xref: "7734c7da7687442"
}

Network Codes

The net request parameter for the Credit and Data API methods should be set according to this table

Network Code
Airtel AIR
Glo GLO
MTN MTN
9Mobile ETI

Data Plans

The following data plans are available

Airtel

Value Size Validity
100 30MB 1 day
200 100MB 3 days
500 750MB 2 weeks
1,000 1.5GB 1 month
2,000 3.5GB 1 month
2,500 5GB 1 month
3,500 7GB 1 month
4,000 9GB 1 month
5,000 10GB 1 month
8,000 16GB 1 month
10,000 22GB 1 month
15,000 30GB 2 months
36,000 50GB 6 months
70,000 100GB 1 year
136,000 200GB 1 year

Glo

Value Size Validity
100 70MB 1 day
200 200MB 5 days
500 1.6GB 10 days
1,000 3.2GB 1 month
2,000 7.5GB 1 month
2,500 10GB 1 month
3,000 12GB 1 month
4,000 16GB 1 month
5,000 24GB 1 month
8,000 32GB 1 month
10,000 46GB 1 month
15,000 60GB 1 month
18,000 90GB 1 month

MTN

Value Size Validity
100 10MB 1 day
200 500MB 1 day
500 750MB 1 week
1,000 1GB 1 month
2000 5GB 1 month
5,000 10GB 1 month
10,000 22GB 1 month

9Mobile

Value Size Validity
200 150MB 1 week
1,000 1GB 1 month
1,200 1.5GB 1 month
2,000 2.5GB 1 month
3,000 4GB 1 month
8,000 11.5GB 1 month
10,000 15GB 1 month
18,000 27.5GB 1 month
27,500 30GB 3 months
55,500 60GB 6 months
84,992 100GB 6 months
110,000 120GB 1 year

Check Request

Request URL
https://api.cowriesys.com/airtime/Check?reference=7734c7da7687442

Request Headers 
ClientId: [email protected] 
Signature: TAP2kgjhhodYUcawFIwsn2GSxjoyVvWWQDZMhHuMFFM= 
Nonce: 20151110202513869

Check Response

A successful request will return the following JSON encoded response

HTTP 200 OK

{
    id: "1253CBF19F431784E610",
    net: "AIR",
    msisdn: "2348124661601",  
    amount: 100,  
    xref: "7734c7da7687442",
    status: "OK"
}

AllocateSingle Pin Request

Request URL
https://api.cowriesys.com/pin/AllocateSingle?unit=110&type=AIRTIME&message=HappyNewYear&xref=20180101215933289

AllocateSingle Pin Response

{
    "serial": "97054",
    "pin": "101436786399",
    "unit": 110,
    "fee": 0,
    "type": "AIRTIME",
    "xref": "20180101215933289",
    "message": "HappyNewYear"
}

Response Error Codes

A failed request will result in one of the following HTTP response error codes.

HTTP Code HTTP Status Description
400 Bad Request Signature does not match or one or more query parameters is incorrect
402 Payment Required Insufficient balance, client account requires payment
403 Forbidden One or more required headers are missing
404 Not Found Network and/or MSISDN are incorrect
409 Conflict Nonce has been used before
500 Server Error The server encountered an error

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