---
title: "Earliest free start time on a channel"
method: GET
path: "/projects/{project_id}/planned_measurements/next_available"
tags: ["Planned Measurements"]
---

# Earliest free start time on a channel

`GET /projects/{project_id}/planned_measurements/next_available`

Return the earliest start time a channel is free for ``duration_seconds``.

``next_available_start`` is ``null`` when the channel is occupied by a
running measurement with no known end time.

## Path parameters

- `project_id` string, required

## Query parameters

- `channel_id` string, required
- `duration_seconds` integer, required

## Response `200`

Successful Response

- unknown

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/ionworks/apis/fastapi.md) · [All operations](https://skmtc.dev/ionworks/apis/fastapi/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/ionworks/fastapi/revisions/7337a3cbdaf2/schema)