swagger-api/swagger-codegen

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swagger-codegen contains a template-driven engine to generate documentation, API clients and server stubs in different languages by parsing your OpenAPI / Swagger definition.

Stars: 17.8k
Forks: 6k
Open beginner issues: 1
Indexed issues: 3.1k

Dominant language: Mustache
License: Apache-2.0
Last GitHub push: Aug 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

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3,072 issues indexed so far

[Bug]: Client serialization does not preserve the API's expected JSON property names and enum representation Open

Bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

swagger-api/swagger-codegen#12764 · Opened Sep 11, 2026
[C#] Properties are escaped with _, which causes deserialization to fail Open

Bug

Difficulty 3/5 1-2 days Newbie friendliness 56/100

swagger-api/swagger-codegen#12757 · Opened Jul 31, 2026
Possible issue: "url" query/path parameter shadows the url module import in typescript-fetch generator Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

swagger-api/swagger-codegen#12755 · Opened Jul 24, 2026
[Bug]: the C# client library generator does not use the 'sourceFolder' option when generate the test project code. Open

Bug

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

swagger-api/swagger-codegen#12751 · Opened Jun 8, 2026
Slow generation: HandlebarTemplateEngine rebuilds Handlebars and reparses templates on every render Open

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

swagger-api/swagger-codegen#12745 · Opened May 22, 2026
[BUG] Cannot parse OpenAPI 3.1 specs using $dynamicRef / $dynamicAnchor (blocked by swagger-parser) Open

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

swagger-api/swagger-codegen#12731 · Opened May 12, 2026
v3.0.78 release tag applied to master (2.x) branch instead of 3.0.0 branch Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

swagger-api/swagger-codegen#12697 · Opened Apr 2, 2026
[Bug]:Codegen in 3.0.78 fails with JsonParseException: Unrecognized token 'openapi': Open

Bug

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

swagger-api/swagger-codegen#12689 · 4 comments · 2 reactions · Opened Feb 27, 2026
[Question]: java25 support or build-error Open

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

swagger-api/swagger-codegen#12688 · Opened Feb 23, 2026
[Question]: Use existing java pojos located in different packages Open

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

swagger-api/swagger-codegen#12687 · Opened Feb 23, 2026
[Question]: swagger-codegen-maven-plugin jakarta.annotation and booleanGetterPrefix Open

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

swagger-api/swagger-codegen#12681 · Opened Feb 4, 2026
[Bug]: String and Boolean and Int properties are being turned into Objects in OpenAPI 3.1.0 Open

Bug

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

swagger-api/swagger-codegen#12666 · 2 comments · 1 reaction · Opened Jan 14, 2026
[Bug]: @EqualsAndHaschode without callsuper Open

Bug

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

swagger-api/swagger-codegen#12665 · Opened Jan 14, 2026
[Bug]: Critical security vulnerability introduced by jersey-client 3.0.10 Open

Bug

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

swagger-api/swagger-codegen#12664 · Opened Jan 12, 2026
[PYTHON] Duplicate method definitions generated when requestBody has multiple content types (F811) Open

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

swagger-api/swagger-codegen#12662 · Opened Jan 2, 2026
gradle-swagger-generator-plugin is archived Open

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

swagger-api/swagger-codegen#12655 · Opened Dec 3, 2025
[Bug]: Cannot target java LocalDateTime via type mappings Open

Bug

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

swagger-api/swagger-codegen#12650 · Opened Nov 11, 2025
[Bug]: Fix Generating Object class attribute when having embedded allOf schema Open

Bug

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

swagger-api/swagger-codegen#12635 · 1 comment · Opened Oct 14, 2025
[CDN]: Support Subresource integrity Open

Feature

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

swagger-api/swagger-codegen#12590 · Opened Jul 29, 2025
Support OpenAPI 3.1.0 Specification in Swagger Codegen Open

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

swagger-api/swagger-codegen#12560 · 1 comment · 11 reactions · Opened Jun 23, 2025
Can't load config class with name rust Open

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

swagger-api/swagger-codegen#12554 · Opened Jun 10, 2025
Model Example Values Not Displayed, Only Data Types Visible Open

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

swagger-api/swagger-codegen#12548 · Opened May 23, 2025
use explicit path Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

swagger-api/swagger-codegen#12543 · 1 reaction · Opened May 14, 2025
`containerDefaultToNull` behavior Open

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

swagger-api/swagger-codegen#12542 · 1 comment · Opened May 12, 2025
python-flask model incorrect for multi-level $ref Open

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

swagger-api/swagger-codegen#12541 · Opened May 1, 2025
[C#] Nullable type generated for required integer property in model Open

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

swagger-api/swagger-codegen#12540 · Opened Apr 18, 2025
Swift generation: Conforming enums to the CaseIterable protocol Open

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

swagger-api/swagger-codegen#12539 · Opened Apr 17, 2025
[CSHARP] Duplicate constructor parameters in generated models from Swagger JSON Open

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

swagger-api/swagger-codegen#12538 · Opened Apr 16, 2025
Program does not compiles on Ubuntu correctly? Open

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

swagger-api/swagger-codegen#12537 · Opened Apr 13, 2025
mcp server codegen support Open

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

swagger-api/swagger-codegen#12536 · 4 comments · 2 reactions · Opened Apr 10, 2025
[Python] fix docstring to comply with PEP 287 Open

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

swagger-api/swagger-codegen#12532 · Opened Mar 20, 2025
[CSHARP] Duplicate headers causing exception Open

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

swagger-api/swagger-codegen#12529 · 2 comments · 2 reactions · Opened Mar 4, 2025
Unwanted "result" Value in @RequestMapping `produces` Attribute Generated by OpenAPI Generator Open

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

swagger-api/swagger-codegen#12527 · Opened Mar 4, 2025
[JAVA] [Feign] Add support for Feign 13 Open

Difficulty 2/5 1-3 hours Newbie friendliness 38/100

swagger-api/swagger-codegen#12524 · 1 comment · Opened Feb 21, 2025
V3 fails to create concrete implementations of "Any-Interface" in Java Open

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

swagger-api/swagger-codegen#12520 · 1 comment · Opened Feb 6, 2025
Date format in the description Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

swagger-api/swagger-codegen#12519 · 1 comment · Opened Feb 5, 2025
Incorrect Import Statement for Resource Class in Generated Code with Swagger Codegen v3.0.46 Open

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

swagger-api/swagger-codegen#12516 · Opened Jan 12, 2025
Swagger generation issue with @JsonInclude(JsonInclude.Include.NON_NULL) Open

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

swagger-api/swagger-codegen#12515 · Opened Jan 10, 2025
[OPENAPI] [swagger-codegen-maven-plugin] Parameters and responses are copied to components/parameters and components/responses, but not referenced to Open

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

swagger-api/swagger-codegen#12511 · 1 reaction · Opened Jan 6, 2025
[CSHARP] int64 being converted to long correctly but given a float default so won't compile Open

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

swagger-api/swagger-codegen#12506 · Opened Dec 19, 2024
[Python] Code generator doesn't preserve original case for variables Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

swagger-api/swagger-codegen#12505 · Opened Dec 19, 2024
[JAVA] 3.0.65 java stub generates method with no return value for get endpoints if $ref is used Open

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

swagger-api/swagger-codegen#12504 · Opened Dec 18, 2024
php-symfony doesn't set return model in doc-comment Open

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

swagger-api/swagger-codegen#12498 · Opened Dec 4, 2024
[JAVA]null value in unit test case code Open

Feature List: API clients Feature: Codegen pull-request-welcome

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

swagger-api/swagger-codegen#12494 · 3 comments · Opened Nov 26, 2024
Python generator ignores case Open

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

swagger-api/swagger-codegen#12492 · Opened Nov 19, 2024
[JavaJaxRS] Vendor Extensions Not Accessed in model.mustache Open

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

swagger-api/swagger-codegen#12486 · Opened Oct 31, 2024
Use AWS STS regional endpoint instead of AWS Global Endpoint by default Open

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

swagger-api/swagger-codegen#12475 · Opened Oct 15, 2024
[JAVA] No validator could be found for constraint '@Size` on enum type Open

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

swagger-api/swagger-codegen#12472 · Opened Oct 7, 2024
[JAVA] Enum field with default generated incorrectly Open

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

swagger-api/swagger-codegen#12469 · Opened Sep 19, 2024
Conversion from v2 to v3 incorrectly changes additionalProperties: {} into additionalProperties: type: object Open

P3 pull-request-welcome Swagger-Parser

Difficulty 3/5 1-2 days Newbie friendliness 52/100

swagger-api/swagger-codegen#12468 · 2 comments · 3 reactions · Opened Sep 15, 2024

swagger-api/swagger-codegen

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