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Issue: 422 Error with RunnablePassthrough/RunnableParallel in LangServe, Works Fine Locally

Status: Open.

#835 In langchain-ai/langserve;

· Void-Creator-Deity opened on Nov 16, 2025

Security: Update FastAPI to address CVE-2025-62727 in Starlette

Status: Open.

#833 In langchain-ai/langserve;

· Cole Murray (ColeMurray) opened on Oct 30, 2025

RuntimeError: super(): __class__ cell not found

Status: Open.

#831 In langchain-ai/langserve;

· Sword40 opened on Oct 20, 2025

httpcore.ConnectError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed

Status: Open.

#827 In langchain-ai/langserve;

· jonathan-zi-wang opened on Sep 19, 2025

batch endpoint triggers PydanticUserError due to List[config] in dynamic model creation

Status: Open.

#815 In langchain-ai/langserve;

· S.Feng (k1dav) opened on May 19, 2025

how can I close the intermediate steps in langserve's playground?

Status: Open.

#812 In langchain-ai/langserve;

· cxp108 opened on Mar 25, 2025

how can i use local model

Status: Open.

#811 In langchain-ai/langserve;

· GXKIM opened on Mar 25, 2025

Streaming events from a tool-calling agent with /serve_events fails on_tool_end

Status: Open.

#810 In langchain-ai/langserve;

· Georgi Pavlov (g-pavlov) opened on Mar 24, 2025

Local LLM example with ollama

Status: Open.

#809 In langchain-ai/langserve;

· Catalin Dinuta (dinuta) opened on Mar 11, 2025

Playground displays blank page for ChatBedrock based chain with configurable_filed temperature

Status: Open.

#804 In langchain-ai/langserve;

· Borys Biletskyy (bbiletskyy) opened on Dec 19, 2024

bug in APIHandler _rename_pydantic_model

Status: Open.

#797 In langchain-ai/langserve;

· DHacky (Hacky-DH) opened on Dec 2, 2024

⚠️ Recommending LangGraph Platform for new projects

Status: Open.

#791 In langchain-ai/langserve;

· Eugene Yurtsev (eyurtsev) opened on Nov 18, 2024