Intermittent QuotaCheckError.INVALID_TOKEN_HEADER / C# API / UserListService

[rob...@straightlineprocessing.com]

I'm using the C# API, application is in development hitting a test ad account.I'm receiving an INVALID_TOKEN_HEADER error on some requests, but the same request works about 30% of the time. I'm only seeing this with the UserListService, other requests with the same credentials are working consistently. Request log is below if anyone can help. Thanks.

Request
-------

POST /api/adwords/rm/v201802/AdwordsUserListService
Authorization: REDACTED
Accept-Encoding: gzip, deflate
TimeStamp: Tue, 10 Apr 2018 01:19:54 GMT


<?xml version="1.0" encoding="utf-16"?>
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
  <s:Header>
    <RequestHeader xmlns="https://adwords.google.com/api/adwords/rm/v201802">
      <clientCustomerId>8764919315</clientCustomerId>
      <developerToken>REDACTED</developerToken>
      <userAgent>unknown (AwApi-DotNet/23.2.0, Common-Dotnet/9.0.0, .NET CLR/4.0.30319.42000, Logging, OAuthApplicationFlow, SelectorBuilder, SelectorField, gzip)</userAgent>
    </RequestHeader>
  </s:Header>
  <s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <get xmlns="https://adwords.google.com/api/adwords/rm/v201802">
      <serviceSelector>
        <fields xmlns="https://adwords.google.com/api/adwords/cm/v201802">Id</fields>
        <fields xmlns="https://adwords.google.com/api/adwords/cm/v201802">Name</fields>
        <fields xmlns="https://adwords.google.com/api/adwords/cm/v201802">Description</fields>
        <fields xmlns="https://adwords.google.com/api/adwords/cm/v201802">Status</fields>
        <fields xmlns="https://adwords.google.com/api/adwords/cm/v201802">IntegrationCode</fields>
        <fields xmlns="https://adwords.google.com/api/adwords/cm/v201802">MembershipLifeSpan</fields>
        <fields xmlns="https://adwords.google.com/api/adwords/cm/v201802">Size</fields>
        <fields xmlns="https://adwords.google.com/api/adwords/cm/v201802">ListType</fields>
        <fields xmlns="https://adwords.google.com/api/adwords/cm/v201802">IsEligibleForDisplay</fields>
        <fields xmlns="https://adwords.google.com/api/adwords/cm/v201802">IsEligibleForSearch</fields>
        <paging xmlns="https://adwords.google.com/api/adwords/cm/v201802">
          <startIndex>0</startIndex>
          <numberResults>500</numberResults>
        </paging>
      </serviceSelector>
    </get>
  </s:Body>
</s:Envelope>

Response
--------

Content-Encoding:
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
Alt-Svc: hq=":443"; ma=2592000; quic=51303432; quic=51303431; quic=51303339; quic=51303335,quic=":443"; ma=2592000; v="42,41,39,35"
Transfer-Encoding: chunked
Cache-Control: private, max-age=0
Content-Type: text/xml; charset=UTF-8
Date: Tue, 10 Apr 2018 05:19:54 GMT
Expires: Tue, 10 Apr 2018 05:19:54 GMT
Server: GSE
TimeStamp: Tue, 10 Apr 2018 01:19:54 GMT


<?xml version="1.0" encoding="utf-16"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Header>
    <ns2:ResponseHeader xmlns:ns2="https://adwords.google.com/api/adwords/rm/v201802" xmlns="https://adwords.google.com/api/adwords/cm/v201802">
      <requestId>00056977ac3698080a813e1bdf097343</requestId>
      <serviceName>AdwordsUserListService</serviceName>
      <methodName>get</methodName>
      <operations>1</operations>
      <responseTime>43</responseTime>
    </ns2:ResponseHeader>
  </soap:Header>
  <soap:Body>
    <soap:Fault>
      <faultcode>soap:Client</faultcode>
      <faultstring>[QuotaCheckError.INVALID_TOKEN_HEADER @ ]</faultstring>
      <detail>
        <ns2:ApiExceptionFault xmlns="https://adwords.google.com/api/adwords/cm/v201802" xmlns:ns2="https://adwords.google.com/api/adwords/rm/v201802">
          <message>[QuotaCheckError.INVALID_TOKEN_HEADER @ ]</message>
          <ApplicationException.Type>ApiException</ApplicationException.Type>
          <errors xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="QuotaCheckError">
            <fieldPath></fieldPath>
            <trigger></trigger>
            <errorString>QuotaCheckError.INVALID_TOKEN_HEADER</errorString>
            <ApiError.Type>QuotaCheckError</ApiError.Type>
            <reason>INVALID_TOKEN_HEADER</reason>
          </errors>
        </ns2:ApiExceptionFault>
      </detail>
    </soap:Fault>
  </soap:Body>
</soap:Envelope>

[Bharani Cherukuri (AdWords API Team)]

Hi Robert, 

Our team is currently investigating the issue. I will keep you posted if I have any new updates to share. 

Thanks,

Bharani, AdWords API Team

[Bharani Cherukuri (AdWords API Team)]

Hello,

The issue has been resolved. Could you please try again and let us know if this still persists.

Best,

Bharani, AdWords API Team