Add a milestone to a project

curl --request POST \
  --url https://slog.ai/projects/{id}/milestones \
  --header 'Content-Type: application/json' \
  --header 'slog-api-key: <api-key>' \
  --data '
{
  "milestoneId": "mile_01jqmile0001"
}
'

import requests

url = "https://slog.ai/projects/{id}/milestones"

payload = { "milestoneId": "mile_01jqmile0001" }
headers = {
    "slog-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'slog-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({milestoneId: 'mile_01jqmile0001'})
};

fetch('https://slog.ai/projects/{id}/milestones', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://slog.ai/projects/{id}/milestones",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'milestoneId' => 'mile_01jqmile0001'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "slog-api-key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://slog.ai/projects/{id}/milestones"

	payload := strings.NewReader("{\n  \"milestoneId\": \"mile_01jqmile0001\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("slog-api-key", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://slog.ai/projects/{id}/milestones")
  .header("slog-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"milestoneId\": \"mile_01jqmile0001\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://slog.ai/projects/{id}/milestones")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["slog-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"milestoneId\": \"mile_01jqmile0001\"\n}"

response = http.request(request)
puts response.read_body

{
  "milestone": {
    "id": "mile_01jqmile0001",
    "reference": "ENG-M1",
    "name": "Beta Launch",
    "description": "First public beta release.",
    "startDate": "2026-05-01",
    "dueDate": "2026-07-01",
    "labels": [
      {
        "id": "label_01jqlabel001",
        "name": "bug",
        "color": "#EF4444"
      }
    ],
    "createdAt": "2026-04-01T08:00:00.000Z",
    "updatedAt": "2026-05-01T10:00:00.000Z"
  }
}

{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "Authentication required"
  }
}

{
  "error": {
    "code": "FORBIDDEN",
    "message": "Requires ADMIN or OWNER role"
  }
}