zio/zio-http

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A next-generation Scala framework for building scalable, correct, and efficient HTTP clients and servers

Stars: 876
Forks: 493
Open beginner issues: 0
Indexed issues: 44
Avg merge: 13h 6m
Merged PRs (30d): 39

Dominant language: Scala
License: Apache-2.0
Last GitHub push: Sep 19, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue help wanted

Beginner friendly Everything

Open All

44 open issues indexed

Processing StreamingForm causes OutOfMemoryError Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 58/100

zio/zio-http#4283 · Opened Sep 2, 2026
Submit the sitemap and validate structured data in Search Console Open

maintenance

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

zio/zio-http#4264 · 1 comment · Opened Aug 21, 2026
Is it intended that request handlers inherit the runtime flags of the fiber that built the Server layer? Open

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

zio/zio-http#4240 · Opened Jul 31, 2026
TestChannel.send never fails, even after the channel has been shut down Open

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

zio/zio-http#4222 · Opened Jul 22, 2026
Middleware.requestLogging (and defect responses in general) silently drop unrecovered defects — no log line at all Open

Difficulty 4/5 3-5 days Newbie friendliness 62/100

zio/zio-http#4221 · 1 comment · 1 reaction · Opened Jul 22, 2026
Allow users to supply their own error handler to `Middleware.serveDirectory` Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 52/100

zio/zio-http#4205 · Opened Jul 11, 2026
[gen] endpoints with inline response body are missing `zio.schema._` import Open

bug

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

zio/zio-http#4198 · Opened Jul 8, 2026
[gen] endpoint header params are always generated with string codec and do not emit optionality Open

bug

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

zio/zio-http#4197 · 1 comment · Opened Jul 8, 2026
[gen] optional endpoint query params are not generated as optional Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 72/100

zio/zio-http#4196 · 1 comment · Opened Jul 8, 2026
RequestStreaming.Enabled: connection stops reading when a response is written without consuming the request body — next keep-alive request is silently dropped Open

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

zio/zio-http#4193 · 1 comment · 1 reaction · Opened Jul 6, 2026
ZSTD support Open

enhancement

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

zio/zio-http#4184 · Opened Jun 24, 2026
Server.install + Client.default across .provide scope boundaries throws PrematureChannelClosureException after 53s (regression in 3.9.0) Open

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

zio/zio-http#4105 · 2 comments · Opened Apr 26, 2026
Nesting doesn't work for Endpoint API-generated routes Open

bug

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

zio/zio-http#4085 · Opened Apr 11, 2026
Restrict Premature Documentation Open

documentation good first issue maintenance

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

zio/zio-http#3869 · 2 comments · Opened Dec 19, 2025
EndpointGen: Support adding custom imports and custom types Open

enhancement

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

zio/zio-http#3867 · Opened Dec 16, 2025
Support OpenAPI endpoint summary in addition to description Open

4.x enhancement

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

zio/zio-http#3862 · 1 comment · Opened Dec 15, 2025
Support TOON Open

enhancement

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

zio/zio-http#3795 · 1 reaction · Opened Nov 14, 2025
Replace jwt-scala Open

enhancement

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

zio/zio-http#3689 · 1 comment · 3 reactions · Opened Sep 11, 2025
Remove java Charset from the public API Open

enhancement

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

zio/zio-http#3650 · Opened Aug 22, 2025
Dynamic select Endpoints Open

♾️ Endpoint enhancement

Difficulty 5/5 Over a week Newbie friendliness 10/100

zio/zio-http#3638 · Opened Aug 18, 2025
Avoid dependency on netty-pkitesting Open

maintenance

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

zio/zio-http#3634 · 2 comments · 1 reaction · Opened Aug 18, 2025
Nonce and Realm are Required for Digest Authentication Open

Breaking Change

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

zio/zio-http#3607 · 1 comment · Opened Aug 5, 2025
Ensure method signatures are minimal Open

enhancement

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

zio/zio-http#3593 · 1 comment · Opened Jul 24, 2025
Is there an ability to replace zio-json by circe or another json library? Open

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

zio/zio-http#3579 · 2 comments · Opened Jul 7, 2025
implicitly support same encoders as decoders for `PathCodec` and `SegmentCodec` Open

enhancement

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

zio/zio-http#3544 · 3 comments · Opened Jun 8, 2025
Allow setting format and validations in open-api spec for all properties of type string Open

enhancement

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

zio/zio-http#3488 · 1 comment · Opened May 11, 2025
Config should be provided to codec in a dynamic way Open

Breaking Change

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

zio/zio-http#3476 · 2 reactions · Opened May 1, 2025
New Netty Driver for HTTP/3 support Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 30/100

zio/zio-http#3475 · 2 reactions · Opened Apr 30, 2025
Play like dev mode Open

enhancement

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

zio/zio-http#3474 · 1 comment · 3 reactions · Opened Apr 30, 2025
Support HTTP/2 via new netty driver Open

enhancement

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

zio/zio-http#3473 · 1 comment · 3 reactions · Opened Apr 30, 2025
WebSocket Client: `WebSocketApp` runs in its own fiber, but should it? Open

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

zio/zio-http#3465 · 1 comment · Opened Apr 22, 2025
WebSocket text frame impl is broken Open

bug

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

zio/zio-http#3342 · 1 comment · Opened Feb 19, 2025
How to implement full duplex protocol using websocket? Open

bug

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

zio/zio-http#3248 · Opened Dec 11, 2024
HandlerAspect and Routes Env does not compose properly on Scala 2 Open

bug

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

zio/zio-http#3231 · 1 reaction · Opened Dec 3, 2024
CLI generated from HttpCliApp.fromEndpoints() is not working Open

bug help wanted

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

zio/zio-http#3226 · 1 comment · Opened Nov 30, 2024
Add config value to log `Throwable` and `Cause` to `ErrorResponseConfig` Open

enhancement

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

zio/zio-http#3177 · 1 comment · Opened Sep 26, 2024
ClassCassException when using HandlerAspect and Path parameters. Open

bug

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

zio/zio-http#3141 · 23 comments · Opened Sep 16, 2024
Pass metadata when using HttpCodec.binaryStream Open

enhancement

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

zio/zio-http#3135 · 7 comments · 1 reaction · Opened Sep 12, 2024
[discussion] make generated JsonCodec re-usable in other code Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 30/100

zio/zio-http#3070 · 24 comments · 1 reaction · Opened Aug 30, 2024
Netty pipeline errors cannot be observed by middleware Open

enhancement

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

zio/zio-http#2725 · 6 comments · 1 reaction · Opened Mar 12, 2024
OpenAPI extension Open

enhancement

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

zio/zio-http#2572 · 7 comments · Opened Dec 28, 2023
Scala Native support Open

enhancement

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

zio/zio-http#2526 · 2 comments · 2 reactions · Opened Nov 18, 2023
Extract Client to a dedicated artifact Open

client maintenance

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

zio/zio-http#1928 · 2 comments · 1 reaction · Opened Jan 11, 2023
Support Graal Native Image Open

information maintenance

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

zio/zio-http#20 · 18 comments · 2 reactions · Opened Mar 12, 2021

zio/zio-http

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