curl --request POST \
  --url https://builder.prod.bedrock.ostium.io/v1/onboard \
  --header 'Content-Type: application/json' \
  --data '
{
  "chainId": 42161,
  "partner": "0x1111111111111111111111111111111111111111",
  "delegation": {
    "delegate": "0x2222222222222222222222222222222222222222",
    "nonce": "0",
    "expiry": "1800000000",
    "signature": "0xabcd"
  },
  "permit": {
    "value": "1000000000000",
    "nonce": "0",
    "deadline": "1800000000",
    "signature": "0xabcd"
  }
}
'

import requests

url = "https://builder.prod.bedrock.ostium.io/v1/onboard"

payload = {
    "chainId": 42161,
    "partner": "0x1111111111111111111111111111111111111111",
    "delegation": {
        "delegate": "0x2222222222222222222222222222222222222222",
        "nonce": "0",
        "expiry": "1800000000",
        "signature": "0xabcd"
    },
    "permit": {
        "value": "1000000000000",
        "nonce": "0",
        "deadline": "1800000000",
        "signature": "0xabcd"
    }
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    chainId: 42161,
    partner: '0x1111111111111111111111111111111111111111',
    delegation: {
      delegate: '0x2222222222222222222222222222222222222222',
      nonce: '0',
      expiry: '1800000000',
      signature: '0xabcd'
    },
    permit: {
      value: '1000000000000',
      nonce: '0',
      deadline: '1800000000',
      signature: '0xabcd'
    }
  })
};

fetch('https://builder.prod.bedrock.ostium.io/v1/onboard', 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://builder.prod.bedrock.ostium.io/v1/onboard",
  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([
    'chainId' => 42161,
    'partner' => '0x1111111111111111111111111111111111111111',
    'delegation' => [
        'delegate' => '0x2222222222222222222222222222222222222222',
        'nonce' => '0',
        'expiry' => '1800000000',
        'signature' => '0xabcd'
    ],
    'permit' => [
        'value' => '1000000000000',
        'nonce' => '0',
        'deadline' => '1800000000',
        'signature' => '0xabcd'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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://builder.prod.bedrock.ostium.io/v1/onboard"

	payload := strings.NewReader("{\n  \"chainId\": 42161,\n  \"partner\": \"0x1111111111111111111111111111111111111111\",\n  \"delegation\": {\n    \"delegate\": \"0x2222222222222222222222222222222222222222\",\n    \"nonce\": \"0\",\n    \"expiry\": \"1800000000\",\n    \"signature\": \"0xabcd\"\n  },\n  \"permit\": {\n    \"value\": \"1000000000000\",\n    \"nonce\": \"0\",\n    \"deadline\": \"1800000000\",\n    \"signature\": \"0xabcd\"\n  }\n}")

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

	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://builder.prod.bedrock.ostium.io/v1/onboard")
  .header("Content-Type", "application/json")
  .body("{\n  \"chainId\": 42161,\n  \"partner\": \"0x1111111111111111111111111111111111111111\",\n  \"delegation\": {\n    \"delegate\": \"0x2222222222222222222222222222222222222222\",\n    \"nonce\": \"0\",\n    \"expiry\": \"1800000000\",\n    \"signature\": \"0xabcd\"\n  },\n  \"permit\": {\n    \"value\": \"1000000000000\",\n    \"nonce\": \"0\",\n    \"deadline\": \"1800000000\",\n    \"signature\": \"0xabcd\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://builder.prod.bedrock.ostium.io/v1/onboard")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"chainId\": 42161,\n  \"partner\": \"0x1111111111111111111111111111111111111111\",\n  \"delegation\": {\n    \"delegate\": \"0x2222222222222222222222222222222222222222\",\n    \"nonce\": \"0\",\n    \"expiry\": \"1800000000\",\n    \"signature\": \"0xabcd\"\n  },\n  \"permit\": {\n    \"value\": \"1000000000000\",\n    \"nonce\": \"0\",\n    \"deadline\": \"1800000000\",\n    \"signature\": \"0xabcd\"\n  }\n}"

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

{
  "status": "confirmed",
  "userOpHash": "0xaaaa",
  "transactionHash": "0xbbbb",
  "state": {
    "onboarded": true,
    "missing": [],
    "delegate": "0x2222222222222222222222222222222222222222",
    "allowance": "115792089237316195423570985008687907853269984665640564039457584007913129639935"
  }
}

{
  "error": "Bad Request",
  "message": "Validation failed",
  "issues": []
}

{
  "error": "Unauthorized",
  "message": "permit signature does not match the partner address"
}

{
  "error": "Forbidden",
  "message": "address is not a permitted partner"
}

{
  "error": "Payload Too Large",
  "message": "request entity too large"
}

{
  "error": "Too Many Requests",
  "message": "Rate limit exceeded. Try again in 7s."
}

{
  "error": "Internal Server Error",
  "message": "Internal Server Error"
}