Get Nid from AssetTree

This is a free API to help you retrieve the Nid (assetCid) from AssetTree file. It requires either a fileURL or input nid or a file object along with a valid Capture Token for authorization. If you do not already have a Capture Token yet, please follow the instruction provided to create one.
API Endpoint:
Cost: 0 NUM (free to use)
Method: POST
This is a free API to help you retrieve the Nid of any file.
This API requires a valid token for Authorization. The token should be passed in the headers of the request using the following format: "Authorization: token YOUR_CAPTURE_TOKEN"
Authorization: token $YOUR_CAPTURE_TOKEN (required)
Content-Type: application/json
Request Body (required):
fileURL (string) // URL of your AssetTree file or
file (object) // uploading AssetTree file directly or
nid (string) // input Nid of your AssetTree file
One of the three above must be provided
Example 1 (direct file upload):
curl -F "file=@/tmp/my_asset_tree.json" \
-H "Authorization: token YOUR_CAPTURE_TOKEN" \
Example 2 (upload via URL)
curl -X POST "" \
-H "Content-Type: application/json" \
-H "Authorization: token YOUR_CAPTURE_TOKEN" \
-d '{
"fileURL": AssetTree_URL
"nid": string // assetCid found in the AssetTree
200: Cid/Nid retrieved successfully
400: Bad request
401: Unauthorized
403: Forbidden
500: Internal Server Error
In this example, you would replace YOUR_CAPTURE_TOKEN with your actual Capture token and /tmp/my_asset_tree.json or AssetTree_URL with the actual file on your filesystem. More examples can be found below:
import requests
url = ""
headers = {
"Content-Type": "application/json",
"Authorization": "token YOUR_CAPTURE_TOKEN"
data = {
"nid": "bafkreihzcudbwkb4vlnhsyfr545mrnswvpwojvmrqt4ej56zdnx43s4dym"
response =, headers=headers, json=data)
const request = require("request");
const url = "";
const headers = {
"Content-Type": "application/json",
"Authorization": "token YOUR_CAPTURE_TOKEN"
const data = {
"fileURL": FILE_URL,
"version": 1
json: data
function(error, response, body) {