---
title: "Add file to a concept commercial rent contract"
slug: "preview-add-file-to-a-concept-commercial-rent-contract"
updated: 2025-11-07T20:01:42Z
published: 2026-02-10T12:51:19Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://www.bloxs.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Add file to a concept commercial rent contract

Post/api/v1/contracts/conceptcommercialrent/files

Uploads a file and links it to the concept commercial rent contract.

		
			

**Description**

Adds a file to a concept commercial rent contract.

**Use Case**

The Bloxs user wants to add a file to a concept commercial rent contract. For example, a floor plan.

**Request****fields**

The request contains the following field:

| Field | Description |
| --- | --- |
| externalIdentifier | The unique identifier within the system of the requesting party. This identifier is not generated by the Bloxs system. This field should contain the externalIdentifier of the estate agent to which the bank accounts belongs. |

		
		
SecurityHTTPType Bearer

Please enter a valid token

Query parametersexternalIdentifierstringRequired

The external API identifier of the model.

Body parameters<select class='api-response-data' aria-label='Media type'><option value='29bef35b-1170-4b04-91cb-330b2fb70451'>multipart/form-data</option>
<option value='423b7f77-139a-458c-9781-1c8db79c6bcc'>application/json</option>
</select>object  Filestring  (binary)    

object  Filestring  (binary)    

Responses200

The file was created

<select class='api-response-data' aria-label='Media type'><option value='bcbbc94f-283d-4440-bb05-b7a338309774'>application/json</option>
</select>integer  (int64)    

400

No file was uploaded

404

There was a problem attaching the file to the contract

<select class='api-response-data' aria-label='Media type'><option value='bc5cf29f-808a-437a-89ae-55be568a8b56'>application/json</option>
</select>Expand Allobject  typestring   | null  
titlestring   | null  
traceIdstring   | null  
statusinteger  (int32)    
errorsobject | null  property* Array of string  | null  additionalPropertiesstring