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Unanswered questions

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mamta_kumavatNew Member
 MoMo API Sand Box Q&A
SandBox and Production Mode doubt

I’m getting invalid subscription key invalid while testing it in sandbox mode while testing it with live url it give resource not found.Below is for sandbox Mode.URL :: https://sandbox.momodeveloper.mtn.com/v1_0/apiuser headers :: {Authorization: Basic ZmY5NTZkMGYtODYwOC00NmZhLWIzMzEtZjRkNDhmNzAwZTNiOm51bGw=, X-Reference-Id: ff956d0f-8608-46fa-b331-f4d48f700e3b, Ocp-Apim-Subscription-Key: 84dbf7a8a0e44923988a0dd621169ec6, Content-Type: application/json} MtnMomo :: body :: {providerCallbackHost: https://dulu.cm/success} [log]MtnMomo :: apiuserAPI :: 401 :: { "statusCode": 401, "message": "Access denied due to invalid subscription key. Make sure to provide a valid key for an active subscription." }Below is for live testing URL :: https://proxy.momoapi.mtn.com/v1_0/apiuser headers :: {X-Reference-Id: 6e1fcdda-0cb1-4a85-8af6-8e3e6ff31942, Ocp-Apim-Subscription-Key: 0144c9f7b7774f4b8108cc4b243561b6, Content-Type: application/json}body :: {providerCallbackHost: https://dulu.cm/success}apiuse

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mazuneNew Member
 MoMo API Sand Box Q&A
Multi-tenant restaurant POS: can Nimbus collect on behalf of restaurants and auto-settle to each merchant?

I am building a platform that helps multiple businesses accept mobile money payments and automatically reconcile successful payments inside the system.I would like guidance on the best and officially supported setup for this model.My main concern is around how collections should work when one platform serves many merchant clients. If the integration is created under the platform account, does that mean funds are received into the platform’s collections account first, or can each client business receive its funds directly?We would prefer a setup where the platform does not have to hold or manage client funds if possible.I would also like to understand:whether each merchant needs its own setup or credentials whether there is any supported third-party, platform, or aggregator model whether it is possible to collect funds and immediately forward them to the merchant automatically whether extra charges apply in that kind of flow what the recommended approach is for this type of use caseAny

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rezamaNew Member
 Testimonies
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munyeshyakaHelpful
 MoMo Rwanda Developers
Follow-up on Go Live Request Submission – https://kcoders.org [subdomains such as: https://cvbuilder.kcoders.org, https://landval.kcoders.org, etc] (Submitted 05/03/2026)

Dear MTN MoMo Developer Support Team,I am writing to follow up on my Go Live request for the https://kcoders.org [subdomains such as: https://cvbuilder.kcoders.org, https://landval.kcoders.org, etc] and Management System, which I submitted via the MoMo Developer portal on 05/03/2026 at 13:48:47. I have not yet received any response or update regarding the status of my application.Could you kindly provide an update on the review process or let me know if any additional information is required from my side?For reference:App Name: https://kcoders.org [subdomains such as: https://cvbuilder.kcoders.org, https://landval.kcoders.org, etc] and Management SystemRegistered Email: munyeshyaka@hotmail.comSubmission Date/Time: 05/03/2026, 13:48:47Thank you for your assistance. I look forward to your response.Best regards,Jean René MUNYESHYAKAMob: +250788620201

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IshimwejayNew Member
 MoMo Rwanda Developers
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BigMoshNew Member
 MoMo API Production Q&A
Preapproval Renew and ValidityTime (Ghana)

Hi Team,I am currently developing a recurring payment solution using the MoMo API (Ghana environment) and would like to clarify the expected behavior for pre-approval mandates to ensure a smooth user experience.1. Renewing Active Mandates:If an MSISDN already has an active pre-approval mandate, what happens if a second POST /preapproval request is sent to that same number before the current one expires?Does the new request overwrite the existing one and reset the validityTime? Does it return a PREAPPROVAL_EXIST_PENDING error even if the previous mandate is already in a SUCCESSFUL state? Is there a recommended way to "extend" a mandate without requiring the customer to perform a fresh approval?2. Maximum validityTime Constraints:Regarding the validityTime parameter in the POST /preapproval payload:What is the maximum allowable value (in seconds) for this field in the Ghana Production environment? Are there platform or regulatory caps (e.g., 365 days) that would cause a validation error

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othkimweriNew Member
 MoMo Uganda Developers
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lukwatajohnNew Member
 MoMo API Sand Box Q&A
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