AWS Bedrock Guardrails

AWS Bedrock Guardrails provide content filtering, PII detection, topic restrictions, and word filters. You must create the guardrail policies in the AWS console and then apply them to LLM route that you want to protect. When a request or response violates a guardrail policy, the agentgateway proxy blocks the interaction and returns an error.

AWS Bedrock Guardrails are model-agnostic and can be applied to any Large Language Model (LLM), whether it is hosted on AWS Bedrock, another cloud provider (like Google or Azure), or on-premises.

Before you begin

1. Set up an agentgateway proxy.
2. Set up access to the OpenAI LLM provider.

Set up AWS Bedrock guardrails

1. Create a guardrail in the AWS console or via the AWS CLI.

2. Retrieve your guardrail identifier and version. For more information, see the AWS documentation.

   aws bedrock list-guardrails --region <aws-region>

   Example output:

   {
    "guardrails": [
        {
            "id": "a1aaaa11aa1a",
            "arn": "arn:aws:bedrock:us-west-2:11111111111:guardrail/a1aaaa11aa1a",
            "status": "READY",
            "name": "my-guardrail",
            "description": "Testing agentgateway bedrock guardrail integration ",
            "version": "DRAFT",
            "createdAt": "2026-02-09T17:59:29+00:00",
            "updatedAt": "2026-02-09T18:01:29.567223+00:00"
        }
    ]
   }
   

3. Create a Kubernetes secret with your AWS credentials. Make sure that you have permission to invoke the Bedrock Guardrails API.

   kubectl create secret generic aws-secret \
     -n agentgateway-system \
     --from-literal=accessKey="$AWS_ACCESS_KEY_ID" \
     --from-literal=secretKey="$AWS_SECRET_ACCESS_KEY" \
     --from-literal=sessionToken="$AWS_SESSION_TOKEN" \
     --type=Opaque \
     --dry-run=client -o yaml | kubectl apply -f -

4. Configure the prompt guard. Add the ID, version, and region of your guardrail.

   kubectl apply -f - <<EOF
   apiVersion: agentgateway.dev/v1alpha1
   kind: AgentgatewayPolicy
   metadata:
     name: openai-prompt-guard
     namespace: agentgateway-system
   spec:
     targetRefs:
     - group: gateway.networking.k8s.io
       kind: HTTPRoute
       name: openai
     backend:
       ai:
         promptGuard:
           request:
           - bedrockGuardrails:
               identifier: <guardrail-ID>
               version: "<version>" 
               region: <region>>
               policies:
                 auth:
                   aws: 
                     secretRef:
                       name: aws-secret
           response:
           - bedrockGuardrails:
               identifier: <guardrail-ID>
               version: "<version>" 
               region: <region>>
               policies:
                 auth:
                   aws: 
                     secretRef:
                       name: aws-secret
   EOF
   ℹ️

   The aws: {} configuration uses the default AWS credential chain (IAM role, environment variables, or instance profile). For authentication details, see the AWS authentication documentation.

5. Test the guardrail. The following commands assume that you set up your guardrail to block requests that contain email information.

   OpenAI v1/chat/completions Custom route

   Cloud Provider LoadBalancer:

   curl "$INGRESS_GW_ADDRESS/v1/chat/completions" -H content-type:application/json  -d '{
    "model": "",
    "messages": [
      {
        "role": "user",
        "content": "My email is test@solo.io"
      }
    ]
   }' | jq

   Localhost:

   curl "localhost:8080/v1/chat/completions" -H content-type:application/json  -d '{
    "model": "",
    "messages": [
      {
        "role": "user",
        "content": "My email is test@solo.io"
      }
    ]
   }' | jq

   Cloud Provider LoadBalancer:

   curl "$INGRESS_GW_ADDRESS/openai" -H content-type:application/json  -d '{
    "model": "",
    "messages": [
      {
        "role": "user",
        "content": "My email is test@solo.io"
      }
    ]
   }' | jq

   Localhost:

   curl "localhost:8080/openai" -H content-type:application/json  -d '{
    "model": "",
    "messages": [
      {
        "role": "user",
        "content": "My email is test@solo.io"
      }
    ]
   }' | jq

   Example output:

   The request was rejected due to inappropriate content
   

Cleanup

kubectl delete AgentgatewayPolicy openai-prompt-guard -n agentgateway-system 
kubectl delete secret aws-secret -n agentgateway-system