---
title: "Retrieve a mapping of volume IDs to entity (class instance) IDs."
method: POST
path: "http://localhost:8000/{project_id}/volumes/entities/"
tags: ["volumes"]
---

# Retrieve a mapping of volume IDs to entity (class instance) IDs.

`POST http://localhost:8000/{project_id}/volumes/entities/`

Retrieve a mapping of volume IDs to entity (class instance) IDs.

## Path parameters

- `project_id` string, required

## Query parameters

- `volume_ids` string

## Response `201`

Created

---

[API](https://skmtc.net/catmaid/apis/catmaid-api.md) · [All operations](https://skmtc.net/catmaid/apis/catmaid-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/catmaid/catmaid-api/versions/adc1c7c5eefe/schema)