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AWS appsync: Fix Lambda API documentation URL in resolver reference

Service: appsync · 2026-08-19 · Documentation low

File: appsync/latest/devguide/resolver-mapping-template-reference-lambda.md

Summary

Corrected a broken hyperlink to Lambda's Invoke API documentation.

Security assessment

The change fixes a documentation URL without altering security-related content or addressing vulnerabilities.

Evidence

-The Lambda data source allows you to define two invocation types: `RequestResponse` and `Event`. The invocation types are synonymous with the invocation types defined in the [Lambda API](https://docs.aws.amazon.com//lambda/latest/api/API_Invoke.html). The `RequestResponse` invocation type lets AWS AppSync call your Lambda function synchronously to wait for a response. The `Event` invocation allows you to invoke your Lambda function asynchronously. For more information on how Lambda handles `Event` invocation type requests, see [Asynchronous invocation](https://docs.aws.amazon.com/lambda/latest/dg/invocation-async.html). The `invocationType` field is optional. If this field is not included in the request, AWS AppSync will default to the `RequestResponse` invocation type.

Diff

diff --git a/appsync/latest/devguide/resolver-mapping-template-reference-lambda.md b/appsync/latest/devguide/resolver-mapping-template-reference-lambda.md
index 72ea1ff64..97cfaca7d 100644
--- a//appsync/latest/devguide/resolver-mapping-template-reference-lambda.md
+++ b//appsync/latest/devguide/resolver-mapping-template-reference-lambda.md
@@ -178 +178 @@ The `payload` field is a container used to pass any well-formed JSON to the Lamb
-The Lambda data source allows you to define two invocation types: `RequestResponse` and `Event`. The invocation types are synonymous with the invocation types defined in the [Lambda API](https://docs.aws.amazon.com//lambda/latest/api/API_Invoke.html). The `RequestResponse` invocation type lets AWS AppSync call your Lambda function synchronously to wait for a response. The `Event` invocation allows you to invoke your Lambda function asynchronously. For more information on how Lambda handles `Event` invocation type requests, see [Asynchronous invocation](https://docs.aws.amazon.com/lambda/latest/dg/invocation-async.html). The `invocationType` field is optional. If this field is not included in the request, AWS AppSync will default to the `RequestResponse` invocation type.
+The Lambda data source allows you to define two invocation types: `RequestResponse` and `Event`. The invocation types are synonymous with the invocation types defined in the [Lambda API](https://docs.aws.amazon.com/lambda/latest/api/API_Invoke.html). The `RequestResponse` invocation type lets AWS AppSync call your Lambda function synchronously to wait for a response. The `Event` invocation allows you to invoke your Lambda function asynchronously. For more information on how Lambda handles `Event` invocation type requests, see [Asynchronous invocation](https://docs.aws.amazon.com/lambda/latest/dg/invocation-async.html). The `invocationType` field is optional. If this field is not included in the request, AWS AppSync will default to the `RequestResponse` invocation type.