Hi,
Thank you for contacting the Google Ads API support team.
I understand you are encountering the INVALID_VALUE error which indicates that
the field's value is invalid. It seems that with additional parameters like
maxCpcBidMicros combined with the maximizeConversionsBiddingStrategy will cause
the endpoint not returning a forecast.
Please refer to the below request body I tested with by removing the additional
parameters, which can get the successful forecast:
{
"forecastPeriod": {
"startDate": "2025-07-22",
"endDate": "2025-08-20"
},
"campaign": {
"languageConstants": [
"languageConstants/1002"
],
"geoModifiers": [
{
"geoTargetConstant": "geoTargetConstants/2250"
}
],
"keywordPlanNetwork": "GOOGLE_SEARCH",
"biddingStrategy": {
"maximizeConversionsBiddingStrategy": {
"dailyTargetSpendMicros": 5000000
}
},
"adGroups": [
{
"biddableKeywords": [
{
"keyword": {
"matchType": "BROAD",
"text": "test1"
}
}
]
},
{
"biddableKeywords": [
{
"keyword": {
"matchType": "PHRASE",
"text": "test2"
}
}
]
},
{
"biddableKeywords": [
{
"keyword": {
"matchType": "EXACT",
"text": "test3"
}
}
],
"negativeKeywords": [
{
"matchType": "BROAD",
"text": "test4"
}
]
}
]
}
}
Is maximize_conversions_bidding_strategy not supported by
GenerateKeywordForecastMetrics?
The maximize_conversions_bidding_strategy field is supported in the
GenerateKeywordForecastMetrics method. But
maximize_conversions_bidding_strategy combined with maxCpcBidMicros is not
supported.
Is there a specific combination of fields or requirements that I may have
missed?
No, you haven't missed any fields but you added additional fields like
maxCpcBidMicros which causes the APi to return an error.
Or does this method only support manual_cpc?
No, the GenerateKeywordForecastMetrics method supports manual_CPC,
maximize_conversions_bidding_strategy and also maximize_clicks_bidding_strategy.
Thanks,
Google Ads API Team
Feedback
How was our support today?
[2025-07-21 14:03:14Z GMT] This message is in relation to case
"ref:!00D1U01174p.!500Ht01swDn0:ref" (ADR-00319582)
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