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MoMo API Sand Box Q&A

MoMo API Sand Box Q&A

Share sandbox questions and get support from the community

92 Topics
208 Replies

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92 Topics

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Newest first

widberNew Member

asked in MoMo API Sand Box Q&A

Getting 200 response when creating Api User.

I believe I an following the instructions correctly. POST https://sandbox.momodeveloper.mtn.com/v1_0/apiuser HTTP/1.1X-Reference-Id: f9b22c29-eaeb-4423-9a29-960ece987648Content-Type: application/jsonCache-Control: no-cacheOcp-Apim-Subscription-Key: ••••••••••••••••••••••••••••••••{ providerCallbackHost: "string"}The X-Reference-Id is a UUID from online generator.Ocp-Apim-Subscription-Key is from mu Collection product.The result:HTTP/1.1 200 OKcache-control: no-cachecontent-length: 247content-type: text/html; charset=utf-8pragma: no-cachevary: Originx-content-type-options: nosniffx-frame-options: SAMEORIGINx-xss-protection: 1; mode=block<html><head><title>Request Rejected</title></head><body>The requested URL was rejected. Please consult with your administrator. Your support ID is: 11597720049319855937 <a href='javascript:history.back();'>[Go Back]</a></body&gt

263

4 days ago

mamta_kumavatNew Member

asked in 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-S

190

11 days ago

menziNew Member

asked in MoMo API Sand Box Q&A

Create user request

Please assist, I am getting this error from the andbox

211

11 days ago

devsmsNew Member

asked in MoMo API Sand Box Q&A

Sandbox RequestToPay | 400 Bad Request Error

These are the steps I follow, I have created a collection product and I have my primary and secondary subscription keys.First step was to create an API user when was successful Second step, i created an API key for the API user which was successful. Third step, I created an access token for the user under the collections product subscription. Fourth step, I initiated the requestToPay request but it keeps failing with a 400 Bad Request. Is this an issue currently with the system (going by the error, it is not) or is it specific t

851

12 days ago

ranihaddadNew Member

asked in MoMo API Sand Box Q&A

Unable to Generate API User – Invalid Subscription Key Error

I hope you are doing well. I need assistance with an issue I am encountering while trying to generate an API user in sandbox environment.I have followed all the steps outlined in the documentation: Signup For An Account – Completed Subscribe To Our Products – Completed (subscribed to Collection Widget) Manage Your Subscriptions – Subscription is active, and I have received both the primary and secondary keys Generate API User and API Key – This step is failing To generate the API user, I am using the following endpoint:POST https://sandbox.momodeveloper.mtn.com/v1_0/apiuserHeaders sent:{ "X-Reference-Id": "<uuid-v4>", "Ocp-Apim-Subscription-Key": "<Subscription-Primary-Key>", "Content-Type": "application/json"

401

12 days ago

kpatchaviNew Member

asked in MoMo API Sand Box Q&A

Request to pay dont send callback

Hi everyone,I’m having some trouble with the MTN MoMo API, specifically with the requestToPay endpoint.When I send a requestToPay, I get an HTTP 200 response, but the body looks like this: HTTP/1.1 200 OK cache-control: no-cache content-length: 247 content-type: text/html; charset=utf-8 pragma: no-cache vary: Origin x-content-type-options: nosniff x-frame-options: SAMEORIGIN x-xss-protection: 1; mode=block <html> <head><title>Request Rejected</title></head> <body> The requested URL was rejected. Please consult with your administrator. Your support ID is: 11597720049318046811 <a href='javascript:history.back();'>[Go Back]</a> </body> </html> The problem is that no callback is ever sent, even though I receive this 200 response.Has anyone experienced this before or knows what might b

170

13 days ago

MatteoNew Member

asked in MoMo API Sand Box Q&A

Can I get 2 different users to pay each other on my app with this api?

I have a mobile application in which people can buy products/services from other users.Is it possible for the sellers, when they signup, to link their mobile money account with this API, so that when the buyers go to buy a product from the seller, they can pay - either with just mobile money too or other payment methods ( I am not sure how that works with this API) - directly too the sellers mobile money account.Also how would this work with different currencies / countries?Thank you MoMo community!

270

1 month ago

wkangongNew Member

asked in MoMo API Sand Box Q&A

bad request remittance transfer

I am getting remittance transfer bad request error message. my request body is this. any wrong?{ "amount": "600", "currency": "EUR", "externalId": "00004335", "payee": { "partyIdType": "MSISDN", "partyId": "56733123450" }, "payerMessage": "MoMo Market Payment", "payeeNote": "MoMo Market Payment"}

1 month ago

edwin.niwahaNew Member

asked in MoMo API Sand Box Q&A

sandbox error

https://momodeveloper.mtn.com/sandbox/Hello MoMo community,I get the below error message on trying to access the sandboxOops, something went wrong

180

1 month ago

nanayawActive

asked in MoMo API Sand Box Q&A

Access token not included in the response(Response 200)

The documentation is very conclusive but the last step in the process was not yielding me what I wanted and I found a video on youtube which used the reference id (uuid) as a username and the api key as the password. As shown in this image https://postimg.cc/87S93Mrk . There was no token. Please I need to clarify the contents of the last request. I don’t want to say the documentation is wrong but the difference is the video used basic auth in the authorization and followed it as I described earlierResponse ```{ "providerCallbackHost": "string", "targetEnviron

221

2 months ago

wkangongNew Member

asked in MoMo API Sand Box Q&A

StatusCode: 500, ReasonPhrase: 'Server Error'

{StatusCode: 500, ReasonPhrase: 'Server Error', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:{ X-XSS-Protection: 1; mode=block Request-Context: appId=cid-v1:e996501c-e721-4ac1-97ff-dc6887b85e8c Date: Wed, 24 Sep 2025 18:39:51 GMT Content-Length: 0}} what is the fixed

263

2 months ago

bhavinNew Member

asked in MoMo API Sand Box Q&A

Unable to obtain a new access token.

i have got error in laravel “Unable to obtain a new access token.”in sendbox

130

3 months ago

oforismlNew Member

asked in MoMo API Sand Box Q&A

Open API Post request Failure: Sandbox Environment

I am consuming the MTN Open API and most of the endpoints worked except for some specific endpoints which I would enlist below;Kindly note that the response I receive from these are all BAD REQUEST so kindly help me out in determining what is the issue; Request to Pay: POST https://sandbox.momodeveloper.mtn.com/collection/v1_0/requesttopayHeaders: X-Target-Environment X-Callback-Url X-Reference-Id Ocp-Apim-Subscription-Key Authorization Request Body: {"amount": "2.0","currency": "GH","externalId": "7916d515-ab40-4bba-bb67-b68bfb13b94c","payer": {"partyIdType": "MSISDN","partyId": "23354****414"},"payerMessage":

14011

4 months ago

DrRamazzottiActive

asked in MoMo API Sand Box Q&A

Sandbox Callback

Hi @all,I configured a user and api key. The call works (requesttopay), but the callback is not executed.I added the host dev.domain.com.xyHeader param for callback is “http://dev.domain.com.xy/webhook/mtnmomo”.No callback.Creating another user with callback domain “domain.com” it works…Any issues with “uncommon” domainnames?

480

4 months ago

DnlcodessNew Member

asked in MoMo API Sand Box Q&A

HELP!!! I’m unable to create an API USER

I tried creating an api user in the postman by sending a post request on postman to this link https://sandbox.momodeveloper.mtn.com/v1_0/apiuser. The post request contained in my header X-Referene-Id(a random uuid generated by a uuid generator), Ocp—Apim-Subscription-Key(which is the primary key gotten after subsrcibing to a product, in my case I subsricbed to the collection widget producr) and Content-type(whose value was application/json). After doing all of this and sending the post request, I am getting a status code of 401 “saying Access Denied due to invalid subscription key. Make sure to provide a valid key for an active subscription”. I have confirmed multiple times that I use the primary key and i even tried out the secondary key but same thing, I have tried to open another account to subscribe to a new product, yet still the same thing. I will sincerely a

1154

5 months ago

mutangizi ronaldNew Member

asked in MoMo API Sand Box Q&A

am failing to create the access token

i dont know when i try to create the access token in the sandbox i get 401 response invalid client .any one help me

1433

5 months ago

wkangongNew Member

asked in MoMo API Sand Box Q&A

Phone Support

we are working on a time sensitive important project and encountering login failure while trying to obtain an access token using basic authentication

401

5 months ago

kmdfmsNew Member

asked in MoMo API Sand Box Q&A

apiuser

I successfully created it using/v1/0/apiuser/v1/0我使用/v1/0/apiuser/v1/0成功创建了它I successfully created it using/v1/0/apiuser/v1/0 apiuser, but using/V1_0/apiuser/{X-Reference Id} does not return any data for apiUser. Which API do I need to use to obtain apiUser? I can successfully obtain apiKey through/v1.0/apiuser/{X-Reference Id}/apikey

361

7 months ago

TeccoNew Member

asked in MoMo API Sand Box Q&A

what is the collection widget about

I have been looking through the documentation and can’t find much information about the collection widget product. All I could find is that it enables a developer or partner to integrate a MoMoPay checkout button to accept Mobile Money payments on your e-commerce site. but what differentiates it from the othe collections product and how can we implement it in the sand box.

1454

8 months ago

csmitNew Member

asked in MoMo API Sand Box Q&A

Sandbox access token invalid token_type?

Hi!When I do a POST to the CreateAccessToken endpoint I get a response where the token_type has a value set to "access_token" instead of something like "Bearer". I’m expecting the token_type to be Bearer since the Transfer endpoint documentation states that the Authorization header should be the “Bearer Authentication Token generated using CreateAccessToken API Call”.Am I missing something?Any help/advice would be greatly appreciated!

360

8 months ago

BoanergesNew Member

asked in MoMo API Sand Box Q&A

Can't create user in sanbox environment getting subscription key invalid, but it is valid.

I am trying to creacte an api user in the sandbox environment, I can verify that I am doing everything correctly however I am getting “Access denied due to invalid subscription key. Make sure to provide a valid key for an active subscription.” . I have tried using the primary and secondary keys, none are working for me. I have gone through most of the issues mentioned and the solution people justed nothing seems to be working for me. As a reference this is the request I am making,curl --location 'https://sandbox.momodeveloper.mtn.com/v1_0/apiuser' \--header 'Ocp-Apim-Subscription-Key: b93400415bde4c96b06c57e698789cda' \--header 'X-Reference-Id: 8b1a5696-9c43-41c6-a884-d11e0f5bfe17' \--header 'Content-Type: application/json' \--data '{ "providerCallbackHost": "https://webhook.site/b6b6cb4c-e9fa-42b8-96a8-b82e25859b85"}'

782

9 months ago

RichouNew Member

asked in MoMo API Sand Box Q&A

check user balance and send money

Hello, i m using momo for wallet base . The wallet is not momo wallet but the user can request to send money in her momo to another account. We need to check balance and transfert the Money from one account to another . How can i achieved that ? thanks

470

9 months ago

gnakoNew Member

asked in MoMo API Sand Box Q&A

[dev sandbox] Invalid subscription key for the Collection Widget | Receive mobile money payments on your website through a USSD or QR code

Hi there,It seems that you have some issues with the generated subscription keys for this Collection Widget. Can you please help me get a proper key that I can use. Neither the primary nor the secondary keys are working.

1335

10 months ago

ddanneelsNew Member

asked in MoMo API Sand Box Q&A

sandbox gives me 400 Bad Request on refund

Hello,I am trying to call disbursement/v1_0/refund on the sandbox but I always get http 400 - Bad Request.Is this method working on the sandbox ? I’ve also tried from your documentation website. Here is the syntax used : POST https://sandbox.momodeveloper.mtn.com/disbursement/v1_0/refund HTTP/1.1Authorization: ...X-Reference-Id: 0a63a755-355f-409c-a94d-a42818dea651X-Target-Environment: sandboxContent-Type: application/jsonCache-Control: no-cacheOcp-Apim-Subscription-Key: 539f8a1f05d94b17a4e53cbe90219f15{ "amount": "7500.9", "currency": "EUR", "externalId": "2B58A65F38C5EA0EE06323671FAC0695", "referenceIdToRefund": "579530f0-68d5-4886-b352-bdec7f816c9f"} HTTP/1.1 400 Bad Requestcontent-length: 0date: Fri, 10 Jan 2025 13:38:44 GMTvary: Originx-xss-protection: 1; mode=block

641

10 months ago

krishna.rathiNew Member

asked in MoMo API Sand Box Q&A

Subscription keys

Hello sir/madam,I have subscripted Collection Widget product but both key is not working. please help.

270

11 months ago