---
title: "Update Application parameters"
method: PATCH
path: "/applications/{tenantName}/{appName}"
tags: ["Application Management"]
---

# Update Application parameters

`PATCH /applications/{tenantName}/{appName}`

Update an existing, deployed FAST Application with the supplied parameters. Existing parameter values from the deployed Application will be used as defaults for any missing parameter values.

## Request body

- object
  - `parameters` ParametersDefinition, required — Object must conform to specified template's schema.

## Response `202`

Template Job Submitted Successfully, check the provided Task ID to get the status of the deployment.

- FastApplicationResponse — The response message when performing Application operations.
  - `_links` LinksDefinition — An object containing link references.
    - `self` string — Self-link to endpoint
    - `task` string — Self-link to task endpoint
  - `code` integer, required
  - `requestId` integer
  - `message` object[], required
    - `id` string — The Task ID which can be used to query Task state.
    - `name` string — The name of the Template used.
    - `parameters` object — The parameters used to create/update the Application.

## Other responses

- `400` — AS3 errors (e.g., invalid schema) are forwarded as 400-level errors. See AS3 documentation for details.
- `500` — Internal error. A bug report should be filed.

## Changes

- **2025-10-20** `702ae6b27810` — 2 breaking, 2 warning, 2 info
  - the `code` response's property type changed from `integer` to no type, and format from `int32` to no format for status `400`
  - the `code` response's property type changed from `integer` to no type, and format from `int32` to no format for status `500`
  - added the new `400.00` enum value to the `code` response property for the response status `400`
  - added the new `500.00` enum value to the `code` response property for the response status `500`
  - …2 more
- **2022-09-26** `8a7a27296ff3` — 3 breaking, 1 warning, 2 info
  - the `code` response's property type changed from no type to `integer`, and format from no format to `int32` for status `400`
  - the `code` response's property type changed from no type to `integer`, and format from no format to `int32` for status `500`
  - removed the required property `errors` from the response with the `400` status
  - removed the optional property `error` from the response with the `500` status
  - …2 more

[Change history](https://skmtc.dev/f5networks/apis/f5-big-ip-application-services-templates-api/changes/applications/:tenantName/:appName/patch.md)

---

[API](https://skmtc.dev/f5networks/apis/f5-big-ip-application-services-templates-api.md) · [All operations](https://skmtc.dev/f5networks/apis/f5-big-ip-application-services-templates-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/f5networks/f5-big-ip-application-services-templates-api/revisions/69d12c15d1c7/schema)