---
title: "Create or update external custom property values for organization repositories"
method: PATCH
path: "/orgs/{org}/properties/installations/values"
tags: ["orgs"]
---

# Create or update external custom property values for organization repositories

`PATCH /orgs/{org}/properties/installations/values`

Create new or update existing external custom property values for repositories in a batch that belong to an organization.
Each target repository will have its external custom property values updated to match the values provided in the request.

A maximum of 30 repositories can be updated in a single request.

Using a value of `null` for an external custom property will remove or 'unset' the property value from the repository.

To use this endpoint, the authenticated GitHub App must have the `organization_external_properties_for_repos:write` permission.

## Path parameters

- `org` string, required

## Request body

- object
  - `repository_names` string[], required — The names of repositories that the external custom property values will be applied to.
  - `properties` CustomPropertyValue[], required — List of external custom property names and associated values to apply to the repositories.
    - `property_name` string, required — The name of the property
    - `value` union, required — The value assigned to the property
      - string, nullable
      - string[]

## Response `204`

No Content when external custom property values are successfully created or updated

## Other responses

- `403` — Forbidden
- `404` — Resource not found
- `422` — Validation failed, or the endpoint has been spammed.

## Changes

> 74 revisions in range; 1 not diffed.

- **2026-09-30** (2022-11-28) `d316fc651e53` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/github/apis/rest/changes/orgs/:org/properties/installations/values/patch.md)

---

[API](https://skmtc.dev/github/apis/rest.md) · [All operations](https://skmtc.dev/github/apis/rest/llms.txt) · [OpenAPI document](https://skmtc.dev/github/apis/rest/revisions/0d2fa885d4a1?raw)