aws/aws-lambda-dotnet

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Libraries, samples and tools to help .NET Core developers develop AWS Lambda functions.

Stars: 1.7k
Forks: 503
Open beginner issues: 2
Indexed issues: 69
Avg merge: 1d 18h
Merged PRs (30d): 21

Dominant language: C#
License: Apache-2.0
Last GitHub push: Sep 17, 2026
Latest indexed: Sep 14, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

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66 open issues indexed

[DurableExecution]: Return Pending when a checkpoint response has no CheckpointToken Open

feature-request

Difficulty 4/5 3-5 days Newbie friendliness 68/100

aws/aws-lambda-dotnet#2572 · 1 comment · Opened Sep 12, 2026
[DurableExecution]: Invalid checkpoint token misclassified as terminal; execution fails instead of invocation Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

aws/aws-lambda-dotnet#2571 · 1 comment · Opened Sep 12, 2026
Emit the ILogger category as a queryable top-level field in JSON log format Open

feature-request needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

aws/aws-lambda-dotnet#2551 · 1 comment · Opened Sep 1, 2026
[Durable Execution]: Support heterogeneous result types in Parallel operations Open

feature-request needs-review

Difficulty 5/5 Over a week Newbie friendliness 35/100

aws/aws-lambda-dotnet#2519 · Opened Aug 6, 2026
JSON log format pairs ILogger message template placeholders with state values by position, garbling ASP.NET Core hosting logs Open

bug investigating p2

Difficulty 3/5 1-2 days Newbie friendliness 70/100

aws/aws-lambda-dotnet#2468 · 2 comments · Opened Jul 8, 2026
Allow custom `JsonSerializerOptions` (and converters) in `JsonLogMessageFormatter` Open

feature-request p2 queued

Difficulty 5/5 Over a week Newbie friendliness 45/100

aws/aws-lambda-dotnet#2350 · 8 comments · Opened Apr 29, 2026
Amazon.Lambda.Core is not deterministic Open

feature-request module/lambda-client-lib p2 queued

Difficulty 3/5 1-2 days Newbie friendliness 48/100

aws/aws-lambda-dotnet#2181 · 2 comments · Opened Nov 7, 2025
Support IDisposable for Function Handlers Open

feature-request module/lambda-client-lib needs-investigation p2

Difficulty 4/5 3-5 days Newbie friendliness 35/100

aws/aws-lambda-dotnet#2159 · 2 comments · 1 reaction · Opened Oct 23, 2025
Support scopes with Amazon.Lambda.Logging.AspNetCore JSON logger Open

feature-request p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 35/100

aws/aws-lambda-dotnet#2122 · 1 reaction · Opened Aug 10, 2025
Amazon.Lambda.AspNetCoreServer.Hosting: Response size logging (middleware) doesn't work in Lambda, but works from CLI Open

bug p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 30/100

aws/aws-lambda-dotnet#2040 · 1 comment · Opened Apr 10, 2025
dotnet-lambda-test-tool-6.0.exe fails with BEX64 Application exception always when launced via Visual Studio, but does not when just ran independently. Open

bug module/lambda-test-tool needs-reproduction p2

aws/aws-lambda-dotnet#2029 · 5 comments · 1 assignee · Opened Apr 4, 2025
amazon.lambda.testtool-8.0 incorrectly compiled with CET enabled Open

bug module/lambda-test-tool p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 35/100

aws/aws-lambda-dotnet#2021 · 3 comments · Opened Mar 24, 2025
Amazon.Lambda.Annotations - Support suppressing serverless.template file creation Open

annotations feature-request p3 queued

Difficulty 3/5 1-2 days Newbie friendliness 45/100

aws/aws-lambda-dotnet#1983 · 2 comments · 1 reaction · Opened Feb 17, 2025
Cognito Authorizer passthrough to Authentication Middleware Open

feature-request m module/lambda-client-lib p2

Difficulty 5/5 Over a week Newbie friendliness 25/100

aws/aws-lambda-dotnet#1961 · 1 comment · Opened Jan 30, 2025
Requesting Generation of the OpenApi (Swagger) specification from Lambda Annotations Open

annotations feature-request p2 queued

Difficulty 5/5 Over a week Newbie friendliness 28/100

aws/aws-lambda-dotnet#1957 · 2 comments · Opened Jan 30, 2025
Method not found: 'Void System.Text.Json.Serialization.Metadata.JsonObjectInfoValues`1<MyLambda.MyDataTransferObject>.set_ConstructorAttributeProviderFactory(System.Func`1<System.Reflection.ICustomAttributeProvider>)' Open

bug module/lambda-client-lib p2

Difficulty 4/5 3-5 days Newbie friendliness 35/100

aws/aws-lambda-dotnet#1944 · 3 comments · Opened Jan 27, 2025
Amazon VPC Lattice support for WebAPI Open

feature-request m module/aspnetcore-support p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 50/100

aws/aws-lambda-dotnet#1943 · 2 comments · 1 reaction · Opened Jan 27, 2025
dotnet-lambda-test tool 6.0 doesn't support aws toolkit with Amazon Q Open

bug module/lambda-test-tool p2

aws/aws-lambda-dotnet#1935 · 5 comments · 1 assignee · Opened Jan 22, 2025
Lambda Generated Main Fails To Compile With Ambiguous Call Error Open

annotations bug investigating p2

Difficulty 4/5 3-5 days Newbie friendliness 45/100

aws/aws-lambda-dotnet#1907 · 2 comments · Opened Dec 16, 2024
AWS Lambda Annotation Functions never passes through middleware Open

annotations feature-request p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 35/100

aws/aws-lambda-dotnet#1875 · 4 comments · Opened Nov 18, 2024
CloudWatchEvents.ScheduledEvent cannot be used with EventBridge Scheduler Open

bug module/lambda-client-lib p2 service-api

Difficulty 4/5 3-5 days Newbie friendliness 35/100

aws/aws-lambda-dotnet#1864 · 7 comments · Opened Nov 8, 2024
AWS Lambda Tools for PowerShell: PackageScript & PackageProject parameter sets aren't documented clearly Open

doc-readme documentation module/lambda-client-lib p2 queued

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

aws/aws-lambda-dotnet#1821 · 1 comment · Opened Sep 25, 2024
Exceeded maximum allowed payload size Open

bug low-effort module/lambda-client-lib p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 42/100

aws/aws-lambda-dotnet#1815 · 4 comments · Opened Sep 20, 2024
Simplify reflection of classes generated by annotations framework Open

annotations feature-request p2

Difficulty 5/5 Over a week Newbie friendliness 25/100

aws/aws-lambda-dotnet#1760 · 6 comments · Opened Jun 14, 2024
Amazon.Lambda.Annotations: allow an alternate IServiceProvider implementation Open

annotations feature-request p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 38/100

aws/aws-lambda-dotnet#1729 · 5 comments · 1 reaction · Opened Apr 12, 2024
Ability to assign Lambda Layers on the function Open

annotations feature-request p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 35/100

aws/aws-lambda-dotnet#1721 · 1 comment · Opened Apr 9, 2024
Is there an ETA for Configure method with ILambdaInvokeBuilder? Open

annotations feature-request m p2 queued

Difficulty 5/5 Over a week Newbie friendliness 25/100

aws/aws-lambda-dotnet#1714 · 6 comments · 2 reactions · Opened Apr 3, 2024
Amazon.Lambda.Annotations with Terraform Open

annotations feature-request p2 queued

Difficulty 5/5 Over a week Newbie friendliness 20/100

aws/aws-lambda-dotnet#1704 · 1 comment · 1 reaction · Opened Mar 20, 2024
In Annotations Framework, is it possible to set up a custom domain for an HttpApi in your serverless.template? Open

annotations feature-request p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 28/100

aws/aws-lambda-dotnet#1703 · 1 comment · Opened Mar 20, 2024
Unable to use user defined types due to Convert.ChangeType Open

annotations bug p2 queued

Difficulty 3/5 1-2 days Newbie friendliness 45/100

aws/aws-lambda-dotnet#1686 · 2 comments · 3 reactions · Opened Feb 29, 2024
How to convert DynamoDBEvent images to DynamoDBv2.Document Open

bug module/lambda-client-lib p2

Difficulty 4/5 3-5 days Newbie friendliness 25/100

aws/aws-lambda-dotnet#1657 · 18 comments · 5 reactions · Opened Jan 17, 2024
Documented handler max length of 128 characters isn't supported Open

bug module/lambda-client-lib p2 queued service-api

Difficulty 3/5 1-2 days Newbie friendliness 45/100

aws/aws-lambda-dotnet#1642 · 5 comments · 1 reaction · Opened Dec 13, 2023
Lambda Annotations API Routing Open

annotations feature-request p2

aws/aws-lambda-dotnet#1616 · 2 comments · 6 reactions · 1 assignee · Opened Nov 16, 2023
AWS .NET Mock Lambda Test Tool should set AWS_LAMBDA_FUNCTION_VERSION environment variable Open

feature-request module/lambda-test-tool p2 queued xs

Difficulty 3/5 1-2 days Newbie friendliness 45/100

aws/aws-lambda-dotnet#1593 · 2 comments · Opened Oct 12, 2023
Lambda Test Tool: LambdaAnnotations | Proper use of HttpResults and [FromBody] attribute. Open

bug module/lambda-test-tool p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 35/100

aws/aws-lambda-dotnet#1576 · 1 comment · 1 reaction · Opened Sep 1, 2023
Update serialization support for Amazon.Lambda.CognitoEvents & Code Generated JsonSerlizationContext's Open

feature-request module/lambda-client-lib needs-investigation p2

aws/aws-lambda-dotnet#1567 · 5 comments · 1 assignee · Opened Aug 12, 2023
Use ILambdaContext.RemainingTime to create a valid CancellationToken for AspNetCoreServer Requests Open

feature-request module/aspnetcore-support p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 35/100

aws/aws-lambda-dotnet#1561 · 3 comments · Opened Aug 8, 2023
Lambda support for DynamoDb Kinesis Stream processing Open

feature-request module/lambda-client-lib p2 queued

Difficulty 5/5 Over a week Newbie friendliness 35/100

aws/aws-lambda-dotnet#1554 · 6 comments · 1 reaction · Opened Jul 30, 2023
Support extending Amazon.Lambda.AspNetCoreServer.Hosting handler Open

feature-request module/aspnetcore-support p1 queued

Difficulty 5/5 Over a week Newbie friendliness 35/100

aws/aws-lambda-dotnet#1551 · 5 comments · 3 reactions · Opened Jul 25, 2023
Lightweight version on Minimal API in Annotations - Single Handler for multiple Requests Open

annotations feature-request p2 queued

Difficulty 5/5 Over a week Newbie friendliness 25/100

aws/aws-lambda-dotnet#1544 · 1 comment · 2 reactions · Opened Jul 7, 2023
AWS Lambda in .net 6.0 create some files in temp storage when it fails with "Exceeded maximum allowed payload size" exception Open

bug module/lambda-client-lib needs-reproduction p2

Difficulty 4/5 3-5 days Newbie friendliness 38/100

aws/aws-lambda-dotnet#1540 · 20 comments · 2 reactions · Opened Jun 27, 2023
Lambda Annotations - make it easier to work with configured api gateways Open

feature-request module/lambda-client-lib p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 42/100

aws/aws-lambda-dotnet#1524 · 1 comment · Opened Jun 8, 2023
Unable to get FromQuery to work Open

annotations bug p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 35/100

aws/aws-lambda-dotnet#1509 · 1 comment · Opened May 9, 2023
Memory Stream of response body is empty while running on Lambda using middleware. Open

bug module/lambda-client-lib p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 38/100

aws/aws-lambda-dotnet#1457 · 2 comments · 4 reactions · Opened Mar 16, 2023
JsonSerializer.Deserialize<T> returns invalid object when called by TypeConverter within AWS Lambda Test Tool Open

bug module/lambda-test-tool p2 queued

Difficulty 3/5 1-2 days Newbie friendliness 35/100

aws/aws-lambda-dotnet#1453 · 3 comments · Opened Mar 13, 2023
Lambda annotations: able to use your own JsonSerializerOptions when parsing request and generating response Open

feature-request module/lambda-client-lib p2 queued

Difficulty 5/5 Over a week Newbie friendliness 25/100

aws/aws-lambda-dotnet#1446 · 2 comments · Opened Mar 2, 2023
When a dotnet lambda zip package contains more than 1 .deps file, the error printed is misleading Open

bug module/lambda-client-lib p2 queued

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

aws/aws-lambda-dotnet#1430 · 4 comments · 1 reaction · Opened Feb 10, 2023
Provide access to JsonSerializerContext via LambdaContext Open

feature-request module/lambda-client-lib needs-investigation p2 queued

Difficulty 5/5 Over a week Newbie friendliness 25/100

aws/aws-lambda-dotnet#1378 · 1 comment · Opened Dec 5, 2022
Give clear error about a malformed config or template.yaml when loading the Mock Lambda Test Tool Open

feature-request module/lambda-test-tool p2 queued

Difficulty 3/5 1-2 days Newbie friendliness 42/100

aws/aws-lambda-dotnet#1376 · 1 comment · Opened Dec 1, 2022
Duplicate response body when running on Lambda and manipulating response body stream in middleware Open

bug module/aspnetcore-support needs-investigation p2 queued

Difficulty 4/5 3-5 days Newbie friendliness 35/100

aws/aws-lambda-dotnet#1185 · 3 comments · 2 reactions · Opened May 20, 2022

aws/aws-lambda-dotnet

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