API Gateway - Execution failed: Resource forbidden due to invalid API Key

Question

API gateway is returning:
```
< HTTP/2 403 
< date: Sun, 07 Jul 2024 02:51:24 GMT
< content-type: application/json
< content-length: 24
< x-amzn-requestid:
< x-amzn-errortype: BadRequestException
< x-amz-apigw-id:=
< 
* Connection #0 to host example.execute-api.ap-southeast-2.amazonaws.com left intact
{"message": "Forbidden"}%
```
when api key required is configured for a method.

In CloudWatch logs a single entry that says "Execution failed: Resource forbidden due to invalid API Key"

Things that have been checked in the web console:
 - key added to a usage plan
 - usage plan assigned to stage
 - api key is correct
 - request is being sent with "X-Api-Key"
 - key is correct
 - stage is deployed
 - method is correct
 - no other authroizer enabled

Michaela · Accepted Answer

The API Gateway console doesn't seem to correctly handle the REST apis. If you perform the following the CLI
```
aws apigateway get-api-keys shows
```
you'll see that the keys are missing configuration for `stageKeys`
```
"stageKeys": []
```

You can set this using the CLI
```
aws apigateway update-api-key --api-key {KEY_ID} --patch-operations op='add',path='/stages',value='{API_GATEWAY_ID}/{STAGE}'
```

The change will take up to 5 minutes to apply (usually shorter)

diopol · Answer

Make sure your API gateway account is migrated to use the `UsagePlans` feature.

In our case, the AWS console was unaware of it and just assumed it was enabled. But it wasn't.

To check your account supports usage plans, execute

```
> aws apigateway get-account
```

Check for `features`, it should include `UsagePlans` item.

If it's not there, execute

```
> aws apigateway update-account --patch-operations op='add',path='/features',value='UsagePlans'
```

This will also create default usage plans, and you may need some cleanup because duplicated usage plans are not allowed.

Pursual · Answer

AWS is such crap. There is always some BS thing like this that is completely obscured in the console and wastes hours of dev's lives.

API Gateway - Execution failed: Resource forbidden due to invalid API Key

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