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What the WSO2-to-AWS integration actually does
In this model, WSO2 API Manager remains the place where you design, publish, and manage the API, while AWS API Gateway provides the runtime gateway that receives client requests. WSO2 sends a WSO2-created REST API to a configured AWS federated gateway environment.
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This is a federated deployment, not a promise that every existing WSO2 gateway policy, backend integration, identity configuration, transformation, throttle, log setting, or operational dependency will transfer unchanged. Inventory and test those items in AWS before treating the deployment as a production migration.
Compatibility and important boundaries
- WSO2 states that deployment to AWS API Gateway is supported from API Manager 4.5.0.
- The documented connector supports REST APIs only. The procedure does not establish equivalent support for WebSocket, GraphQL, or other API types.
- The deployment guide is written for API Manager 4.6.0. Check the documentation for the exact API Manager version installed, particularly when using a release older than 4.5.0.
- AWS API Gateway still has its own deployment, stage, authorization, integration, logging, and operational behavior. Validate the resulting AWS configuration rather than assuming WSO2 settings are a complete representation of it.
Prerequisites before you start
AWS IAM identity and permissions
Create a dedicated IAM identity for the connector and generate the required access credentials. Do not use AWS root credentials. Grant only the permissions needed for the API Gateway operations, integrations, stages, and related resources your workflow actually uses. Review the policy as the deployment design changes.
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WSO2 administration access
You need access to the WSO2 API Manager Admin Portal so you can create a gateway environment and configure its AWS connection details.
Key-management and authentication design
The documented setup includes registering a third-party key manager. Select a key manager that matches how your clients obtain and present tokens, then verify that its issuer, audience, signing keys, and token-validation behavior align with the AWS authorization configuration.
Backend integration
Define the API’s backend before deployment. WSO2’s example includes an AWS Lambda function and execution role, but Lambda is an example integration, not a universal requirement. An API using another supported backend must be configured and tested for that backend instead.
Step-by-step deployment procedure
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Create least-privilege AWS credentials
In AWS IAM, create the connector identity and access keys required by your WSO2 environment. Record the credentials securely; do not place them in source code or share them through tickets or chat. Confirm that the identity can perform the API Gateway and integration operations required by your design.
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Register AWS API Gateway in WSO2
Open the WSO2 Admin Portal and create a gateway environment with type AWS. Enter the AWS configuration and credential details requested by the connector. Save the environment and verify that it is available as a deployment target.
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Configure the key manager
Register the third-party key manager in WSO2 and configure the token details required by your API. Test token issuance and validation independently where possible, because a successful registration does not prove that an AWS request will be authorized.
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Create or design the REST API
Use WSO2 API Manager to create the API, define its resources and methods, and configure the backend. If the backend is AWS Lambda, configure the function and its execution role according to AWS requirements. For another backend, verify network reachability, credentials, timeouts, and response mapping before deployment.
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Apply AWS OAuth2 security
Apply the AWS OAuth2 policy at the API or resource level. WSO2 states that a resource-level policy takes precedence when both API-level and resource-level policies are configured. Do not leave the policy unset: WSO2 warns that omitting it deploys the API without security. After deployment, make an authorized request and an intentionally unauthorized request to confirm the expected behavior.
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Deploy through the AWS gateway environment
Choose the configured AWS gateway environment as the deployment target and deploy the API from WSO2. Check the deployment result in both WSO2 and AWS, including resources, methods, integrations, authorizers, and resource policies.
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Publish the API if consumers need portal discovery
WSO2’s workflow can publish the API to the Developer Portal. The guide notes that subscriptions are not required for APIs deployed to AWS API Gateway; authentication and authorization still need to be configured correctly.
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Create or select an AWS stage
AWS REST APIs must be associated with a deployment and a stage before clients can call them. Use stages for environments such as development, testing, and production, and set the stage variables or canary configuration required by your release process.
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Run smoke tests
Call the stage’s invocation URL with a valid token, then test invalid or missing credentials, each important method, backend error handling, throttling expectations, and logging. Confirm that the request reaches the intended backend and that sensitive data is not exposed in logs.
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Stages and redeployment: the AWS behavior to plan for
AWS describes a REST API deployment as a snapshot associated with a stage. Creating or editing a resource, method, integration, authorizer, resource policy, or related API setting can require a new deployment before the change is live. Treat deployment and smoke testing as explicit release steps; do not assume that saving an edit in WSO2 automatically changes the running AWS endpoint.
Use separate stages for lifecycle environments and document which WSO2 release maps to each stage. AWS also supports canary deployments, which can provide a controlled way to expose a new deployment to a subset of traffic when that fits your change-management process.
Federated deployment versus discovering an existing AWS API
These two WSO2 capabilities move in opposite directions and should not be treated as equivalent migration paths.
| Question | Deploy from WSO2 to AWS | Discover AWS into WSO2 |
|---|---|---|
| Where does the API originate? | It is created or managed in WSO2 and deployed outward. | It already exists in AWS API Gateway and is brought into the WSO2 control plane. |
| Primary lifecycle owner | WSO2 coordinates design and federated deployment; AWS runs the gateway. | The existing AWS API remains the starting point, with WSO2 providing management and discovery. |
| Documented API type | REST APIs only. | The discovery documentation describes importing APIs already deployed in AWS; confirm supported types for your installed version. |
| Security setup | Requires AWS credentials, an AWS gateway environment, a key manager, and an AWS OAuth2 policy when security is required. | Existing AWS authorization and configuration must be assessed as part of bringing the API under WSO2 management. |
| Runtime readiness | AWS deployment must be associated with a stage before clients can call it. | The existing AWS deployment and stage remain relevant; importing metadata does not remove AWS release requirements. |
Migration checks that prevent false confidence
- Routes and methods: Compare every WSO2 resource with the deployed AWS resource and method list.
- Backends: Verify integration type, credentials, network access, timeouts, error mapping, and response transformations.
- Authorization: Test the configured OAuth2 policy, token validation, authorizers, resource policies, and failure responses.
- Traffic controls: Recheck throttling, quotas, usage plans, and any limits that were enforced in WSO2.
- Observability: Confirm execution logging, access logging, metrics, correlation identifiers, and retention settings in AWS.
- Stages: Ensure the intended deployment snapshot is associated with the correct stage and invocation URL.
- Operational ownership: Assign responsibility for redeployments, rollback, credentials rotation, incident response, and stage promotion.
Troubleshooting common failures
The AWS environment is unavailable in WSO2
Check that the gateway environment was created with type AWS, that all required connection fields are present, and that the configured IAM identity has the necessary permissions. Rotate or replace credentials if they are expired, disabled, or stored incorrectly.
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The API deploys but requests are unauthenticated
Inspect the API- and resource-level security settings. A missing AWS OAuth2 policy can result in an unsecured deployment. If both levels are configured, verify the resource-level policy because it takes precedence.
AWS returns a route or stage error
Confirm that the API was deployed in AWS and that the deployment is associated with the stage named in the client URL. If resources or methods changed after the last deployment, create and associate a fresh deployment.
The backend does not respond as expected
Compare the AWS integration with the WSO2 design, including Lambda permissions or other backend credentials, network paths, request mapping, timeout limits, and error responses. A successful WSO2 deployment operation does not guarantee backend runtime success.
Bottom line
For API Manager 4.5.0 and later, WSO2 provides a documented federated path for deploying WSO2-created REST APIs to AWS API Gateway. Configure IAM credentials, an AWS gateway environment, a key manager, and explicit AWS OAuth2 security; then deploy to AWS and associate the result with a stage. Plan for version-specific behavior, validate every integration and policy in AWS, and redeploy when API resources change.
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