Cross-link an entity to a peer entity

curl --request POST \
  --url https://backend.branch.flowengineering.com/project/{projectId}/entities/{entityId}/crosslinks \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --header 'customer: <customer>' \
  --data '
{
  "crosslinkId": "<string>",
  "branchId": "<string>"
}
'

import requests

url = "https://backend.branch.flowengineering.com/project/{projectId}/entities/{entityId}/crosslinks"

payload = {
    "crosslinkId": "<string>",
    "branchId": "<string>"
}
headers = {
    "customer": "<customer>",
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {
    customer: '<customer>',
    'X-API-Key': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({crosslinkId: '<string>', branchId: '<string>'})
};

fetch('https://backend.branch.flowengineering.com/project/{projectId}/entities/{entityId}/crosslinks', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "crosslinks": [
    "<string>"
  ],
  "entityId": "<string>"
}