---
title: "Reload Extension Bundle"
method: POST
path: "/api/v1/extensions/{extension_id}/bundles/{bundle_name}/reload"
tags: ["Extensions"]
---

# Reload Extension Bundle

`POST /api/v1/extensions/{extension_id}/bundles/{bundle_name}/reload`

Trigger an atomic-swap reload for a single Bundle.

Returns the typed :class:`~lfx.extension.reload.ReloadResult` body on
success.  Per the typed-error contract, structural failures
(broken bundle, missing source path, name mismatch) surface as
``422 Unprocessable Entity`` with the first typed error in the body
so clients can surface fix hints inline; the full ``ReloadResult``
payload (with all errors and warnings) is returned via the FastAPI
``detail`` envelope.  Concurrency-control collisions surface as
``409 Conflict`` (``reload-in-progress``).  Non-2xx is the wire
contract for every error path -- the body still carries the typed
error so the client renders the same fix-hint envelope.

## Path parameters

- `extension_id` string, required
- `bundle_name` string, required

## Response `200`

Successful Response

- object

## Other responses

- `422` — Validation Error

## Changes

- **2026-06-08** `a5c4fa6a88f7` — 1 info
  - endpoint added
- **2025-10-16** `9bd3e81318d7` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/langflow-ai/apis/langflow/changes/api/v1/extensions/:extension_id/bundles/:bundle_name/reload/post.md)

---

[API](https://skmtc.dev/langflow-ai/apis/langflow.md) · [All operations](https://skmtc.dev/langflow-ai/apis/langflow/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/langflow-ai/langflow/revisions/088c1fc24528/schema)