---
title: "GET /udl/starcatalog/queryhelp"
method: GET
path: "/udl/starcatalog/queryhelp"
tags: ["Star Catalog"]
---

# GET /udl/starcatalog/queryhelp

`GET /udl/starcatalog/queryhelp`

## Request

- Base URL: `https://unifieddatalibrary.com`
- URL: `https://unifieddatalibrary.com/udl/starcatalog/queryhelp`
- Auth: none declared

Service operation to provide detailed information on available dynamic query parameters for a particular data type.

## Response `200`

OK

- ServiceDescriptor
  - `name` string
  - `uri` string
  - `historySupported` boolean
  - `aodrSupported` boolean
  - `restSupported` boolean
  - `sortSupported` boolean
  - `description` string
  - `classificationMarking` string
  - `parameters` ParamDescriptor[]
    - `name` string
    - `type` string
    - `classificationMarking` string
    - `description` string
    - `unitOfMeasure` string
    - `format` string
    - `required` boolean
    - `derived` boolean
    - `elemMatch` boolean
    - `utcDate` boolean
    - `restTupleSupported` boolean
    - `histTupleSupported` boolean
    - `restQuerySupported` boolean
    - `histQuerySupported` boolean
  - `requiredRoles` string[]
  - `typeName` string

## Other responses

- `400`: Bad Request
- `401`: User Unauthorized
- `403`: User Is Not Authorized
- `405`: Method Not Allowed
- `406`: MediaType Not Accepted by Request Headers
- `429`: Rate of Requests Exceeds Allowed Limit
- `500`: Internal Server Error

## Changes

> 12 revisions in range; 1 could not be searched.

- **2025-05-29** `4e1cbc17e814`: 1 info
  - added the media type `application/json` for the response with the status `200`
- **2025-04-16** `75f764c843a9`: 2 info
  - api operation id `queryhelp_130` removed and replaced with ``
  - the endpoint scheme security `BasicAuth` was removed from the API

[Operation history](https://skmtc.dev/bluestaq/apis/unified-data-library-services-api/changes/udl/starcatalog/queryhelp/get.md)

---

[API](https://skmtc.dev/bluestaq/apis/unified-data-library-services-api.md) - [All operations](https://skmtc.dev/bluestaq/apis/unified-data-library-services-api/llms.txt) - [OpenAPI document](https://skmtc.dev/bluestaq/apis/unified-data-library-services-api/revisions/bd17bc53681e?raw)