curl --request POST \
  --url https://api.daimo.com/v1/sessions/{sessionId}/paymentMethods \
  --header 'Content-Type: application/json' \
  --data '
{
  "clientSecret": "d7a8f3b2e1c94a6db8f0e2a7c3d5b9f1",
  "paymentMethod": {
    "type": "evm"
  }
}
'

import requests

url = "https://api.daimo.com/v1/sessions/{sessionId}/paymentMethods"

payload = {
    "clientSecret": "d7a8f3b2e1c94a6db8f0e2a7c3d5b9f1",
    "paymentMethod": { "type": "evm" }
}
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({clientSecret: 'd7a8f3b2e1c94a6db8f0e2a7c3d5b9f1', paymentMethod: {type: 'evm'}})
};

fetch('https://api.daimo.com/v1/sessions/{sessionId}/paymentMethods', 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://api.daimo.com/v1/sessions/{sessionId}/paymentMethods",
  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([
    'clientSecret' => 'd7a8f3b2e1c94a6db8f0e2a7c3d5b9f1',
    'paymentMethod' => [
        'type' => 'evm'
    ]
  ]),
  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://api.daimo.com/v1/sessions/{sessionId}/paymentMethods"

	payload := strings.NewReader("{\n  \"clientSecret\": \"d7a8f3b2e1c94a6db8f0e2a7c3d5b9f1\",\n  \"paymentMethod\": {\n    \"type\": \"evm\"\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://api.daimo.com/v1/sessions/{sessionId}/paymentMethods")
  .header("Content-Type", "application/json")
  .body("{\n  \"clientSecret\": \"d7a8f3b2e1c94a6db8f0e2a7c3d5b9f1\",\n  \"paymentMethod\": {\n    \"type\": \"evm\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.daimo.com/v1/sessions/{sessionId}/paymentMethods")

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  \"clientSecret\": \"d7a8f3b2e1c94a6db8f0e2a7c3d5b9f1\",\n  \"paymentMethod\": {\n    \"type\": \"evm\"\n  }\n}"

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

{
  "session": {
    "sessionId": "a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4",
    "status": "waiting_payment",
    "destination": {
      "type": "evm",
      "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
      "chainId": 8453,
      "chainName": "Base",
      "tokenAddress": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "tokenSymbol": "USDC",
      "amountUnits": "10.00"
    },
    "display": {
      "title": "Deposit to Acme",
      "verb": "Deposit"
    },
    "paymentMethod": {
      "type": "evm",
      "receiverAddress": "0x1234567890abcdef1234567890abcdef12345678",
      "createdAt": 1700000000
    },
    "createdAt": 1700000000,
    "expiresAt": 1700003600
  }
}

{
  "error": {
    "type": "validation_error",
    "code": "invalid_parameter",
    "message": "invalid session create request",
    "param": "body"
  }
}

{
  "error": {
    "type": "validation_error",
    "code": "invalid_parameter",
    "message": "invalid session create request",
    "param": "body"
  }
}

{
  "error": {
    "type": "validation_error",
    "code": "invalid_parameter",
    "message": "invalid session create request",
    "param": "body"
  }
}