BerriAI/litellm · error · ValueError

Vector store file list is not supported for {custom_llm_prov

Error message

Vector store file list is not supported for {custom_llm_provider}

What it means

Provider-support check when listing vector store files: no provider config exists for the resolved custom_llm_provider, so the list operation has no backend implementation to dispatch to.

Source

Thrown at litellm/vector_store_files/main.py:265

    **kwargs,
) -> VectorStoreFileListResponse | Coroutine[Any, Any, VectorStoreFileListResponse]:
    local_vars: Final = locals()
    try:
        litellm_logging_obj: Final[LiteLLMLoggingObj] = kwargs.get("litellm_logging_obj")
        litellm_call_id: Final[str | None] = kwargs.get("litellm_call_id")
        _is_async: Final = kwargs.pop("alist", False) is True

        custom_llm_provider = _ensure_provider(custom_llm_provider)

        _prepare_registry_credentials(vector_store_id=vector_store_id, kwargs=kwargs)

        litellm_params: Final = GenericLiteLLMParams(vector_store_id=vector_store_id, **kwargs)

        provider_config: Final = ProviderConfigManager.get_provider_vector_store_files_config(
            provider=LlmProviders(custom_llm_provider)
        )
        if provider_config is None:
            raise ValueError(f"Vector store file list is not supported for {custom_llm_provider}")

        local_vars.update(kwargs)
        list_query: VectorStoreFileListQueryParams = VectorStoreFileRequestUtils.get_list_query_params(local_vars)

        litellm_logging_obj.update_from_kwargs(
            kwargs=kwargs,
            model=None,
            optional_params={"vector_store_id": vector_store_id, **list_query},
            litellm_params={
                "vector_store_id": vector_store_id,
                "litellm_call_id": litellm_call_id,
                **litellm_params.model_dump(exclude_none=True),
            },
            custom_llm_provider=custom_llm_provider,
        )

        response: Final = base_llm_http_handler.vector_store_file_list_handler(
            vector_store_id=vector_store_id,

View on GitHub (pinned to 77b7c6c40c)

Solutions

1. Use a provider that supports listing vector store files, or implement it in a custom provider wrapper for {custom_llm_provider}.

When it happens

Trigger: Thrown at litellm/vector_store_files/main.py:265 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of BerriAI/litellm@77b7c6c40c (2026-08-18). Data as JSON: /api/errors/9becb44dc07c715c. Report an issue: GitHub.