---
title: "Start Kernel"
method: POST
path: "/v1/kernel/kernels/start"
tags: ["kernel"]
---

# Start Kernel

`POST /v1/kernel/kernels/start`

Accept a start_kernel request and return an operation_id immediately.

The get_user_filesystem dependency chains: OAuth session/internal JWT → user → filesystem.
The user's filesystem path is injected into the body before forwarding
to the upstream gateway, which bind-mounts it into the Singularity container.

If the kernel is already running, emits ``kernel_alive`` and returns
immediately — mirroring the local backend's behaviour and avoiding a
misleading "Kernel starting…" / "Kernel started ✓" toast cycle.

Poll GET /operations/{operation_id} for the result.

## Response `200`

Successful Response

- unknown

---

[API](https://skmtc.net/quadrillion/apis/quadrillion-cloud-api.md) · [All operations](https://skmtc.net/quadrillion/apis/quadrillion-cloud-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/quadrillion/quadrillion-cloud-api/revisions/ee473d0e84e0/schema)