curl --request POST \
  --url https://app.thinnest.ai/api/v1/phone-numbers \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "number": "918041234567"
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({number: '918041234567'})
};

fetch('https://app.thinnest.ai/api/v1/phone-numbers', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://app.thinnest.ai/api/v1/phone-numbers"

payload = { "number": "918041234567" }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "number": "918041234567",
  "label": null,
  "source": "rented",
  "agent": null,
  "since": "2026-10-06T10:30:05.442Z",
  "provider": null,
  "callingAgent": null
}

{
  "error": "`number` is required — one from GET /phone-numbers/available."
}

{
  "error": "Send a valid API key as `Authorization: Bearer <key>`."
}

{
  "error": "Top up first — a number is charged for its first month as soon as you take it."
}

{
  "error": "Phone numbers need a paid plan. Switch to pay-as-you-go — there is no monthly fee — and top up, because a number is charged every month."
}

{
  "error": "Your business details are still being checked. This usually takes a few minutes."
}

{
  "error": "Over 240 requests a minute. Slow down and retry."
}

{
  "error": "We could not finish setting that number up, so it was handed back. Try again, or pick another."
}