FAQ

Authentication

1. What credentials do I need once I have subscribed to a product?

• Subscription Key - received upon subscription to a product. It is used for authenticating the number of API calls. For information about subscription keys, refer to point 2
• API User and API Key for bearer Oauth 2.0 token. In the sandbox they are self-generated from the APIs. In production these are generated from the partner portal (part of onboarding)

2. What is a subscription Key?

• This Key is used to authenticate and limit the number of calls that can be made
• The subscription key is assigned to the Ocp-Apim-Subscription-Key parameter of the header
• The Subscription Key can be found in your user profile
• Developers - can use either the Primary Key or Secondary Key for every product they subscribe to allow access to the API
• A developer cannot access or utilize any of the respective APIs without a Subscription Key
• Different subscription keys can be used for different product APIs; please check in your user profile

3. What is the API User and API Key for Oauth 2.0?

• The API User and API Key are used together with your subscription key to grant access to the -wallet system and is applicable to a specific country
• The API User and API Key are generated using respective APIs in the sandbox
• API user and Key are wholly managed by the merchant through Partner Portal for PRODUCTION setups
• Merchants can generate/revoke/refresh API Keys through the Partner Portal
• For Sandbox API User and Key is generated using an API

4. How do I generate an Oauth 2.0 token?

• You require an API User and API Key in format APIUSER: APIKey e16510xx-7282-4a39-xx8b-da054889a33a:xx1894d23a8d4xxdadaf62f39dae99xx
• Convert the concatenation of APIUser: APIKey into Base64 format
• Use the Base64 format to generate the authorization token, the result will look similar to this string ZTE2NTEwY2xtNzI4Mi00YTx5LTg5OGItZGEwNTQ4ODlhMzNhOjg1MTg5NGQyM2E4ZDQxMW RhZGFmNxJmMzlkYWU5OcY4

5. How do I create, provision and manage the API user and API key?

• Please review Sandbox provisioning process under API Sandbox
• The API User and API Key are used to grant access to the wallet system applicable to a specific country
• API user and Key are wholly managed by the merchant through Partner Portal in production
• Developers can generate or revoke API Keys through the Partner Portal in production

6. How do I generate a UUID for my transactions?

• This ID is used, for example, validating the status of the request. 'Universal Unique ID' for the transaction generated using UUID version 4
• Example of Version 4 UUID: - ca58fd96-2478-4624-b663-bdacd5f914ca

Callback

7. I am not getting any callbacks. How do I verify or configure my callback URL?

Check that you have

• Registered a ProviderCallbackHost when creating your API User
• You have specified a callback URL in the Request
• The Callback URL MUST belong to the same domain as the ProvideCallbackHost. Subdomains are not allowed.

Example:

• If you have specified your ProviderCallbackHost as mycallback.com then the callback URL shall be specified as https://mycallback.com/
• Using https://subdomain.mycallback.com/ as callback URL will not work
• Callbacks in the sandbox are set by setting the callback host when creating an API user, if my callback URL for traffic is https://testsite.test.com:1313/api/callback, the callback host is testsite.test.com and the callback host is what is set with the user, but the call back URL is used in every request where a callback is expected
• In the production environment, the callback is set in the merchant portal and instructions are sent as part of the onboarding documentation

Setting up a Callback URL

• Transfer and RequestToPay APIs are Asynchronous in MTN MoMo API Platform
• When a merchant system sends a POST of either /transfer, or /requesttopay APIs, the Gateway validates the request and then responds with '202 Accepted'
• The transaction is then queued for processing.
• Once processed, a callback with the final result of the transaction is sent to the merchant system
• In order to receive the callback for your transactions, please consider the following:

  a) On Sandbox

  • Register your callback host by specifying the domain as providerCallbackHost when creating your API Keys. On production this will be done via the Account Portal
  • Specify the callback URL in each of your /requesttopay or /tranfer POST
  • Use http and not https on sandbox
  • Allow PUT & POST on your callback listener host

  b) On Production

  • After Go-live you will be provided a link to log on to your Accounts Portal
  • You will be required to register you callback host on the portal when creating your API keys as shown below
  • Only https is allowed on production
  • Allow PUT & POST on your callback listener host



• The Wallet Platform will only send the callback once. There is no retry on the callback if the Partner system does not respond. A merchant system can, in cases where a callback was not received , poll for the transaction status as described in the GET method

Error Code

Transfer is used for transferring money from the provider account to a customer.

8. What are the common error codes you may expect?

• The error codes are categorized as follows (Common Error Codes, Preapproval Error Codes, RequestToPay Error Codes, Transfer Error Codes and Validate Account Holder Error Codes)
• The API User and API Key are used to grant access to the wallet system applicable to a specific country
• More information on error codes can be found under the documentation section

Support

9. How do I get support and join the developer community?

• Select the 'contact support' button
• Select a country from the drop-down list
• Choose WhatsApp and join the developer group - start chatting
• Or connect via Skype

On-Boarding

10. What steps do I need to follow go live?

• Select the 'Go-Live' option on portal
• Select Operating country from predefined list to take products Live in that Operating country
• Choose a Package and Product set
• Provide KYC Information for business owner and business details
• Download, complete and submit KYC documents as well as signed contract
• Submit documents through the Sandbox Portal for Vetting and Approval
• Access to the partner portal granted for you to create the API User and API Key

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