Re: Walmart Marketplace API

How do you tell what port you're using in HTTPAPI?

On Thu, Sep 18, 2025 at 2:36 PM Greg Wilburn <
[email protected]> wrote:

> So I am still struggling here... I am able to connect to this API and
> receive an Access Token using Postman.  However, I cannot seem to connect
> successfully from a simple RPG pgm using HTTPAPI (something I use all the
> time).
>
> I've even compared the HTTP request in Postman to the HTTPAPI debug file.
> I even compared the Base64 encoded "Authorization" in Notepad++.
>
> Differences:
> 1. Postman has a "cookie"
> 2. Headers are in a different order
>
> Any ideas?  I'm at a complete loss.
>
> Postman HTTP (successful):
> POST /v3/token HTTP/1.1
> Host: marketplace.walmartapis.com
> WM_SVC.NAME: Walmart Marketplace
> Accept: application/json
> User-Agent: http-api/1.43
> Content-Type: application/x-www-form-urlencoded
> Authorization: Basic YTJlZTE.....
> Cookie: ak_bmsc=.......p4aGV/sU=~1
> Content-Length: 29
>
> grant_type=client_credentials
>
>
> HTTPAPI (unsuccessful):
> POST /v3/token HTTP/1.1
> Host: marketplace.walmartapis.com
> User-Agent: http-api/1.43
> Content-Type: application/x-www-form-urlencoded
> Content-Length: 29
> Authorization: Basic YTJlZTE...
> WM_SVC.NAME: Walmart Marketplace
> Accept: application/json
>
> senddoc(): entered
> grant_type=client_credentials
> recvresp(): entered
> SetError() #44: CommTCP_read: Socket has been shut down.
> recvresp(): end with err
> http_close(): entered
>
>
>
>
> -----Original Message-----
> From: RPG400-L <[email protected]> On Behalf Of Greg
> Wilburn
> Sent: Tuesday, September 16, 2025 8:31 AM
> To: RPG programming on IBM i <[email protected]>
> Subject: RE: Walmart Marketplace API
>
> Sure...
>
> The clientId and clientSecret are set above this code.  I am trying to get
> an Access Token.
>
>
>     rc = http_setauth(HTTP_AUTH_BASIC :clientID  :clientSecret);
>
> // Get an Access Token
>     http_debug(*on :FLDR + '/' + inCom + '/http_debug.txt');
>
>     URL = 'https://marketplace.walmartapis.com/v3/token';
>     method = 'POST';
>     form = WebForm_open();
>     WebForm_setVar(form :'grant_type' :'client_credentials');
>     body = WebForm_getData(form);
>     WebForm_close(form);
>
>     Response = FLDR + '/' + inCom + '/token_response.json';
>
>     Exec Sql set :uuid = generate_uuid();
>     Ifs_WriteToFile(logFd:'UUID: ' + uuId);
>     headerVars.partnerId = '10001667921';
>     headerVars.uniqueId = uuId;
>     headerVars.serviceName = 'Walmart Marketplace';
>     headerVars.acceptType = 'application/json';
>
>     rc = http_xproc( HTTP_POINT_ADDL_HEADER
>                    : %paddr(addHttpHeaders)
>                    : %addr(headerVars));
>
>     rc = http_req( method
>                  : URL
>                  : response
>                  : *omit
>                  : *omit
>                  : body
>                  : 'application/x-www-form-urlencoded');
>
>
>
> -----Original Message-----
> From: RPG400-L <[email protected]> On Behalf Of Jon
> Paris
> Sent: Monday, September 15, 2025 6:43 PM
> To: RPG programming on the IBM i (AS/400 and iSeries) <
> [email protected]>
> Subject: Re: Walmart Marketplace API
>
> Wanna share a code snippet so we can see what you are requesting.  I
> played with this API a while back and had no issues.  Nothing special that
> I can recall.
>
>
> Jon Paris
> [email protected]
>
>
>
> > On Sep 15, 2025, at 5:02 PM, Greg Wilburn <
> [email protected]> wrote:
> >
> > Just wondering if anyone has implemented this?
> >
> > Having issues just getting a token using HTTPAPI... the debug log shows
> an "unknown protocol" error.  I'm not sure that I've noticed that before.
> >
> > Any insight would be appreciated.
> >
> > SetError() #49: SSL_protocol: Unknown protocol 5000
> > Protocol Used:
> > http_persist_req(POST) entered.
> > http_long_ParseURL(): entered
> > http_long_ParseURL(): entered
> > do_oper(POST): entered
> > There are 0 cookies in the cache
> > POST /v3/token HTTP/1.1
> > Host: marketplace.walmartapis.com
> > User-Agent: http-api/1.43
> > Content-Type: application/x-www-form-urlencoded
> > Content-Length: 29
> > Authorization: Basic  - DELETED -
> > WM_PARTNER.ID: 10001667921
> > WM_QOS.CORRELATION_ID: 82B37F6E-C4A5-4675-AA4B-AC14A2CD33B7
> > WM_SVC.NAME: Walmart Marketplace
> > Accept: application/json
> >
> > senddoc(): entered
> > grant_type=client_credentials
> > recvresp(): entered
> > SetError() #44: CommTCP_read: Socket has been shut down.
> > recvresp(): end with err
> > http_close(): entered
> > [Logo]<https://www.totalbizfulfillment.com/>    Greg Wilburn
> > Director of IT
> > 301.895.3792 ext. 1231
> > 301.895.3895 direct
> > [email protected]<mailto:[email protected]
> >
> > 1 Corporate Dr
> > Grantsville, MD 21536
> > www.totalbizfulfillment.com<http://www.totalbizfulfillment.com>
> > --
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>
> Greg Wilburn
> Director of IT
> 301.895.3792 ext. 1231
> --
> This is the RPG programming on IBM i (RPG400-L) mailing list
> To post a message email: [email protected]
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>
>
>
> Greg Wilburn
> Director of IT
> 301.895.3792 ext. 1231
> --
> This is the RPG programming on IBM i (RPG400-L) mailing list
> To post a message email: [email protected]
> To subscribe, unsubscribe, or change list options,
> visit: https://lists.midrange.com/mailman/listinfo/rpg400-l
> or email: [email protected]
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