langchain-ai/langgraph · error · HostBackendError

POST /v2/deployments succeeded but response missing a valid

Error message

POST /v2/deployments succeeded but response missing a valid 'id'

What it means

Error "POST /v2/deployments succeeded but response missing a valid 'id'" thrown in langchain-ai/langgraph.

Source

Thrown at libs/cli/langgraph_cli/deploy.py:654

    *,
    name: str,
    deployment_type: str,
    source: str,
    config_rel: str | None = None,
    secrets: list[dict[str, str]] | None = None,
) -> tuple[str, int]:
    """Create a deployment and return its ID and next step number."""
    _log_deploy_step(step, f"Creating deployment '{name}'")
    created = client.create_deployment(
        name=name,
        deployment_type=deployment_type,
        source=source,
        config_path=config_rel,
        secrets=secrets,
    )
    created_id = created.get("id") if isinstance(created, dict) else None
    if not isinstance(created_id, str) or not created_id:
        raise HostBackendError(
            "POST /v2/deployments succeeded but response missing a valid 'id'"
        )
    _get_emitter().info(f"Deployment ID: {created_id}", deployment_id=created_id)
    return created_id, step + 1


def _smith_dashboard_base_url(host_url: str | None) -> str:
    """Derive the LangSmith dashboard base URL from the API host URL."""
    from urllib.parse import urlparse

    if not host_url:
        return "https://smith.langchain.com"
    parsed = urlparse(host_url)
    hostname = parsed.hostname or ""
    if hostname in ("localhost", "127.0.0.1"):
        return host_url.rstrip("/")

    api_host_suffix = "api.host.langchain.com"

View on GitHub (pinned to 38031739e5)

When it happens

Trigger: Thrown at libs/cli/langgraph_cli/deploy.py:654 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of langchain-ai/langgraph@38031739e5 (2026-08-26). Data as JSON: /api/errors/f98e6e97b2ae871c. Report an issue: GitHub.