> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://docs.agentmail.to/llms.txt.

# Attach Human

POST https://api.agentmail.to/v0/agent/human
Content-Type: application/json

Attach a human to an unverified agent organization. A 6-digit OTP is sent to the human's email, which you then submit to the verify endpoint.

Use it after signing up without a `human_email`. Once the human is attached, the organization can send email to that human only, and verification lifts the remaining restrictions. For up to 5 minutes after attaching, sends to the human can still be rejected with a `429` daily send limit error while the API key's cached limits catch up. Wait and retry.

Calling it again with the same `human_email` does not rotate the API key. It resends the OTP if it was never delivered, or issues a new one if it expired. While the current OTP is still valid, calling it again keeps that OTP and its attempt count. If all 10 attempts are used up, wait until the OTP expires, 24 hours after it was issued, then call it again for a new one.

Calling it with a different `human_email` replaces the attached human and sends the new human an OTP. An organization can replace its human at most 2 times.

Only available until the organization is verified.

**CLI:**
```bash
agentmail agent attach-human --human-email user@example.com
```

Reference: https://docs.agentmail.to/api-reference/agent/attach-human

## Authentication

- `Authorization` header (bearer token, required) — Bearer authentication of the form `Bearer <token>`, where token is your auth token.

## Servers

- `https://api.agentmail.to` (prod, default)
- `https://x402.api.agentmail.to` (prod-x402)
- `https://mpp.api.agentmail.to` (prod-mpp)
- `https://api.agentmail.eu` (eu-prod)

## Request

### Body (application/json)

This endpoint expects an AgentAttachHumanRequest.

- `human_email` (string, required) — Email address of the human who owns the agent. A 6-digit OTP will be sent to this address.

## Response

### 200

- `human_email` (string, required) — Email address of the attached human.
- `instructions` (string, required) — Next steps for the agent, in plain text.

## Errors

### 400 Validation Error

- `name` (string, required) — Name of error.
- `errors` (any, required) — Validation errors. Each entry has a path and a message identifying the invalid field.
- `code` (string, optional) — Stable, machine-readable error code in snake_case (for example, not_found or missing_permission). Branch on this rather than the message text.
- `message` (string, optional) — Error message.
- `fix` (string, optional) — The concrete next action that resolves the error.
- `docs` (string, optional) — Link to the error reference entry for this code.

### 409 Conflict Error

- `name` (string, required) — Name of error.
- `message` (string, required) — Error message.
- `code` (string, optional) — Stable, machine-readable error code in snake_case (for example, not_found or missing_permission). Branch on this rather than the message text.
- `fix` (string, optional) — The concrete next action that resolves the error.
- `docs` (string, optional) — Link to the error reference entry for this code.

## Examples

**Request**

```json
{
  "human_email": "human_email"
}
```

**Response**

```json
{
  "human_email": "human_email",
  "instructions": "instructions"
}
```

**SDK Code**

```python
import requests

url = "https://api.agentmail.to/v0/agent/human"

payload = { "human_email": "human_email" }
headers = {
    "Authorization": "Bearer <api_key>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript
const url = 'https://api.agentmail.to/v0/agent/human';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <api_key>', 'Content-Type': 'application/json'},
  body: '{"human_email":"human_email"}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

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

func main() {

	url := "https://api.agentmail.to/v0/agent/human"

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

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

	req.Header.Add("Authorization", "Bearer <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(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.agentmail.to/v0/agent/human")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <api_key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"human_email\": \"human_email\"\n}"

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

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.agentmail.to/v0/agent/human")
  .header("Authorization", "Bearer <api_key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"human_email\": \"human_email\"\n}")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.agentmail.to/v0/agent/human', [
  'body' => '{
  "human_email": "human_email"
}',
  'headers' => [
    'Authorization' => 'Bearer <api_key>',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://api.agentmail.to/v0/agent/human");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <api_key>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"human_email\": \"human_email\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "Bearer <api_key>",
  "Content-Type": "application/json"
]
let parameters = ["human_email": "human_email"] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.agentmail.to/v0/agent/human")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```