curl --request POST \
  --url https://api.lemlist.com/api/campaigns/{campaignId}/steps/{stepId}/skip-for-leads \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "leads": [
    "lea_A1B2C3D4E5F6G7H8I",
    "jane@example.com",
    "ghost@example.com"
  ]
}
'

import requests

url = "https://api.lemlist.com/api/campaigns/{campaignId}/steps/{stepId}/skip-for-leads"

payload = { "leads": ["lea_A1B2C3D4E5F6G7H8I", "jane@example.com", "ghost@example.com"] }
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({leads: ['lea_A1B2C3D4E5F6G7H8I', 'jane@example.com', 'ghost@example.com']})
};

fetch('https://api.lemlist.com/api/campaigns/{campaignId}/steps/{stepId}/skip-for-leads', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

require 'uri'
require 'net/http'

url = URI("https://api.lemlist.com/api/campaigns/{campaignId}/steps/{stepId}/skip-for-leads")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Basic <encoded-value>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"leads\": [\n    \"lea_A1B2C3D4E5F6G7H8I\",\n    \"jane@example.com\",\n    \"ghost@example.com\"\n  ]\n}"

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

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.lemlist.com/api/campaigns/{campaignId}/steps/{stepId}/skip-for-leads",
  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([
    'leads' => [
        'lea_A1B2C3D4E5F6G7H8I',
        'jane@example.com',
        'ghost@example.com'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Basic <encoded-value>",
    "Content-Type: application/json"
  ],
]);

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

curl_close($curl);

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

{
  "total": 3,
  "skipped": 2,
  "alreadySkipped": 0,
  "notFound": [
    "ghost@example.com"
  ],
  "results": [
    {
      "lead": "lea_A1B2C3D4E5F6G7H8I",
      "status": "skipped"
    },
    {
      "lead": "jane@example.com",
      "status": "skipped"
    },
    {
      "lead": "ghost@example.com",
      "status": "not_found"
    }
  ]
}

{
  "error": "At most 100 leads per call",
  "code": "STEP_SKIP_TOO_MANY_LEADS"
}

The authentication you supplied is incorrect

{
  "error": "Step not found in this campaign",
  "code": "STEP_SKIP_STEP_NOT_FOUND"
}

{
  "error": "A condition step cannot be skipped",
  "code": "STEP_SKIP_STEP_IS_CONDITION"
}