curl --request POST \
  --url https://www.dench.com/api/v1/email/campaigns/{campaignId}/recipients \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "recipients": [
    {
      "email": "ada@lovelace.dev",
      "displayName": "Ada Lovelace",
      "personalization": {
        "firstName": "Ada",
        "company": "Lovelace Labs"
      }
    }
  ]
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    recipients: [
      {
        email: 'ada@lovelace.dev',
        displayName: 'Ada Lovelace',
        personalization: {firstName: 'Ada', company: 'Lovelace Labs'}
      }
    ]
  })
};

fetch('https://www.dench.com/api/v1/email/campaigns/{campaignId}/recipients', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://www.dench.com/api/v1/email/campaigns/{campaignId}/recipients"

payload = { "recipients": [
        {
            "email": "ada@lovelace.dev",
            "displayName": "Ada Lovelace",
            "personalization": {
                "firstName": "Ada",
                "company": "Lovelace Labs"
            }
        }
    ] }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "added": 47,
  "duplicates": 2,
  "suppressed": 1,
  "invalid": 0,
  "totalRecipients": 120
}

{
  "error": {
    "message": "<string>",
    "type": "<string>",
    "code": "<string>",
    "details": "<unknown>"
  }
}

{
  "error": {
    "message": "<string>",
    "type": "<string>",
    "code": "<string>",
    "details": "<unknown>"
  }
}

{
  "error": {
    "message": "<string>",
    "type": "<string>",
    "code": "<string>",
    "details": "<unknown>"
  }
}

{
  "error": {
    "message": "<string>",
    "type": "<string>",
    "code": "<string>",
    "details": "<unknown>"
  }
}