---
title: "Request the delta-signature for a given package. Used to optimize file upload."
method: GET
path: "/packages/{packageId}/{version}/delta-signature"
tags: ["Packages"]
---

# Request the delta-signature for a given package. Used to optimize file upload.

`GET /packages/{packageId}/{version}/delta-signature`

## Request

- Base URL: `https://demo.octopus.app/api`
- URL: `https://demo.octopus.app/api/packages/{packageId}/{version}/delta-signature`
- Auth: one of:
  - API key in header `X-Octopus-ApiKey`
  - API key in query parameter `ApiKey`
  - API key in header `X-NuGet-ApiKey`

## Path parameters

- `packageId` string, required
- `version` string, required

## Response `200`

Returns the delta-signature for a given package. Used to optimize file upload.

- PackageSignatureResource
  - `BaseVersion` string
  - `Signature` string, byte

## Other responses

- `400`: Bad request. Either the payload was not structurally valid or business rules did not permit the operation.
- `404`: Not found. One or more of the entities involved in the operation was not found.

---

[API](https://skmtc.dev/octopus/apis/octopus-server-api.md) - [All operations](https://skmtc.dev/octopus/apis/octopus-server-api/llms.txt) - [OpenAPI document](https://skmtc.dev/octopus/apis/octopus-server-api/revisions/fe937c07da34?raw)