curl --request POST \
  --url https://app.fliqr.ai/api/pipelines/{pipeline_id}/opportunities/{opportunity_id} \
  --header 'Content-Type: application/json' \
  --header 'X-ACCESS-TOKEN: <api-key>' \
  --data '
{
  "title": "This is a test opportunity",
  "description": "...",
  "stage_id": 12334,
  "value": 300,
  "status": "open",
  "priority": "low",
  "assigned_admins": [
    55446563
  ],
  "custom_fields": [
    {
      "id": 1234,
      "value": "Any data"
    },
    {
      "name": "Age",
      "value": 30
    }
  ]
}
'

const options = {
  method: 'POST',
  headers: {'X-ACCESS-TOKEN': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    title: 'This is a test opportunity',
    description: '...',
    stage_id: 12334,
    value: 300,
    status: 'open',
    priority: 'low',
    assigned_admins: [55446563],
    custom_fields: [{id: 1234, value: 'Any data'}, {name: 'Age', value: 30}]
  })
};

fetch('https://app.fliqr.ai/api/pipelines/{pipeline_id}/opportunities/{opportunity_id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://app.fliqr.ai/api/pipelines/{pipeline_id}/opportunities/{opportunity_id}"

payload = {
    "title": "This is a test opportunity",
    "description": "...",
    "stage_id": 12334,
    "value": 300,
    "status": "open",
    "priority": "low",
    "assigned_admins": [55446563],
    "custom_fields": [
        {
            "id": 1234,
            "value": "Any data"
        },
        {
            "name": "Age",
            "value": 30
        }
    ]
}
headers = {
    "X-ACCESS-TOKEN": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "success": true
}