langflow-ai/langflow · error · HTTPException

No deployment adapter registered for provider_key '{adapter_

Error message

No deployment adapter registered for provider_key '{adapter_key}'.

What it means

Error "No deployment adapter registered for provider_key '{adapter_key}'." thrown in langflow-ai/langflow.

Source

Thrown at src/backend/base/langflow/api/v1/mappers/deployments/helpers.py:450

) -> DeploymentServiceProtocol:
    try:
        adapter_key = require_non_empty(
            provider_key,
            "Deployment provider account has no provider_key configured.",
        )
    except ValueError as exc:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=str(exc),
        ) from exc

    try:
        deployment_adapter = get_deployment_adapter(adapter_key)
    except Exception as exc:
        logger.exception("Failed to resolve deployment adapter for key '%s': %s", adapter_key, exc)
        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail=str(exc)) from exc
    if deployment_adapter is None:
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail=f"No deployment adapter registered for provider_key '{adapter_key}'.",
        )
    return deployment_adapter


async def get_deployment_row_or_404(
    *,
    deployment_id: UUID,
    user_id: UUID,
    db: DbSession,
) -> Deployment:
    # ``get_deployment_db`` is share-aware when an authorization plugin is
    # registered and ``LANGFLOW_AUTHZ_ENABLED`` is on; otherwise it stays
    # owner-scoped. Routes still call ``ensure_deployment_permission`` after
    # this to authorize the actor against the resolved deployment.
    deployment_row = await get_deployment_db(db, user_id=user_id, deployment_id=deployment_id)
    if deployment_row is None:

View on GitHub (pinned to 976ec789d2)

Solutions

1. Use a supported provider_key, or register an adapter for this provider.

When it happens

Trigger: Occurs when no deployment adapter is registered for the account's provider_key.

Common situations: See trigger scenarios.

AI-assisted analysis of langflow-ai/langflow@976ec789d2 (2026-08-14). Data as JSON: /api/errors/8f76ddd1e04a5c75. Report an issue: GitHub.