Find working email via sequential SMTP pattern probing (x402-paid, $0.010 USDC)
curl --request POST \
--url https://api.example.com/api/x402/v1/email/find \
--header 'Content-Type: application/json' \
--data '
{
"candidates": [
{}
],
"first_name": "<string>",
"last_name": "<string>",
"domain": "<string>"
}
'import requests
url = "https://api.example.com/api/x402/v1/email/find"
payload = {
"candidates": [{}],
"first_name": "<string>",
"last_name": "<string>",
"domain": "<string>"
}
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({
candidates: [{}],
first_name: '<string>',
last_name: '<string>',
domain: '<string>'
})
};
fetch('https://api.example.com/api/x402/v1/email/find', 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.example.com/api/x402/v1/email/find",
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([
'candidates' => [
[
]
],
'first_name' => '<string>',
'last_name' => '<string>',
'domain' => '<string>'
]),
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.example.com/api/x402/v1/email/find"
payload := strings.NewReader("{\n \"candidates\": [\n {}\n ],\n \"first_name\": \"<string>\",\n \"last_name\": \"<string>\",\n \"domain\": \"<string>\"\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.example.com/api/x402/v1/email/find")
.header("Content-Type", "application/json")
.body("{\n \"candidates\": [\n {}\n ],\n \"first_name\": \"<string>\",\n \"last_name\": \"<string>\",\n \"domain\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.example.com/api/x402/v1/email/find")
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 \"candidates\": [\n {}\n ],\n \"first_name\": \"<string>\",\n \"last_name\": \"<string>\",\n \"domain\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"found": true,
"backend": "<string>",
"email": "<string>",
"pattern": "<string>",
"result": "<string>",
"is_catch_all": true
}{
"detail": {
"error": "ERR_EMAIL_FIND_CATCH_ALL",
"is_catch_all": true
}
}x402
Find working email via sequential SMTP pattern probing (x402-paid, $0.010 USDC)
SYNC inline SMTP find. No ARQ. No user context. Idempotent per candidate list.
Caller either pre-computes candidates or passes first/last/domain and we
generate them. Returns the first pattern that SMTP-validates, or
found=false if none did.
POST
/
api
/
x402
/
v1
/
email
/
find
Find working email via sequential SMTP pattern probing (x402-paid, $0.010 USDC)
curl --request POST \
--url https://api.example.com/api/x402/v1/email/find \
--header 'Content-Type: application/json' \
--data '
{
"candidates": [
{}
],
"first_name": "<string>",
"last_name": "<string>",
"domain": "<string>"
}
'import requests
url = "https://api.example.com/api/x402/v1/email/find"
payload = {
"candidates": [{}],
"first_name": "<string>",
"last_name": "<string>",
"domain": "<string>"
}
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({
candidates: [{}],
first_name: '<string>',
last_name: '<string>',
domain: '<string>'
})
};
fetch('https://api.example.com/api/x402/v1/email/find', 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.example.com/api/x402/v1/email/find",
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([
'candidates' => [
[
]
],
'first_name' => '<string>',
'last_name' => '<string>',
'domain' => '<string>'
]),
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.example.com/api/x402/v1/email/find"
payload := strings.NewReader("{\n \"candidates\": [\n {}\n ],\n \"first_name\": \"<string>\",\n \"last_name\": \"<string>\",\n \"domain\": \"<string>\"\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.example.com/api/x402/v1/email/find")
.header("Content-Type", "application/json")
.body("{\n \"candidates\": [\n {}\n ],\n \"first_name\": \"<string>\",\n \"last_name\": \"<string>\",\n \"domain\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.example.com/api/x402/v1/email/find")
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 \"candidates\": [\n {}\n ],\n \"first_name\": \"<string>\",\n \"last_name\": \"<string>\",\n \"domain\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"found": true,
"backend": "<string>",
"email": "<string>",
"pattern": "<string>",
"result": "<string>",
"is_catch_all": true
}{
"detail": {
"error": "ERR_EMAIL_FIND_CATCH_ALL",
"is_catch_all": true
}
}Body
application/json
Request body for POST /api/x402/v1/email/find.
Agents either pass pre-computed candidates or pass first_name +
last_name + domain and we generate canonical candidate patterns.
⌘I