> Toden documentation. For the full index fetch /llms.txt. Every page is available as Markdown by appending .md to its URL. Identity verification uses /api/kyc, Risk Intelligence uses /api/v1; they are separate contracts with different error shapes. Never invent an endpoint, field or enum value: read the API reference page for the operation first.

# Record a device or session signal

POST https://sandbox-api.toden.co/api/identity/signals
Content-Type: application/json

Stores a device or session signal against a customer. The signal is stored only: it is not scored, raises no alert, fires no webhook and is not billed. The call is not idempotent, so each request stores a new signal.

**Error codes**

| `error` | Status | Meaning |
|---|---|---|
| `invalid_request` | 400 | The body failed validation. `details` carries the field-level breakdown. |
| `secret_key_required` | 403 | A publishable key was used. This API accepts secret keys only. |
| `environment_mismatch` | 403 | The key belongs to an environment this host does not serve. |
| `rate_limited` | 429 | The request rate limit for this key was reached. Retry after a short wait. |
| `rate_limit_store_unavailable` | 503 | Rate limiting is temporarily unavailable. Retry shortly. |

A missing or unknown key returns `401` with a plain sentence in `error` rather than a code.

Requires a secret (`sk_`) key. A publishable key receives `403 secret_key_required`.

Reference: https://docs.toden.co/api-reference/verification/events-and-signals/submit-signal

## Authentication

- `Authorization` header (bearer token, required) — Send the API key as a Bearer token. Each operation states whether a publishable key is enough or a secret key is required.

## Servers

- `https://sandbox-api.toden.co` (Sandbox, default)
- `https://api.toden.co` (Production)

## Request

### Body (application/json)

This endpoint expects a SignalRequest.

- `externalUserId` (string, required) — Your own reference for the customer the event belongs to.
- `type` (string, required) — A free-form name for the signal, such as `device`.
- `data` (map from string to any, optional) — Free-form details of the signal.

## Response

### 202

The signal was stored.

- `id` (string, required) — The identifier of the stored signal.

## Errors

### 400 Bad Request Error

The request body, query or path was invalid.

- `error` (string, required) — A stable machine-readable code such as `invalid_input`. Authentication failures (401) carry a short sentence here instead of a code.
- `message` (string, optional) — A human-readable explanation, safe to log. The wording may change.

### 401 Unauthorized Error

The Authorization header is missing, or the API key is unknown or revoked.

- `error` (string, required) — A stable machine-readable code such as `invalid_input`. Authentication failures (401) carry a short sentence here instead of a code.
- `message` (string, optional) — A human-readable explanation, safe to log. The wording may change.

### 403 Forbidden Error

The key may not call this endpoint, or the organisation may not use this feature.

- `error` (string, required) — A stable machine-readable code such as `invalid_input`. Authentication failures (401) carry a short sentence here instead of a code.
- `message` (string, optional) — A human-readable explanation, safe to log. The wording may change.

### 429 Too Many Requests Error

A rate limit was reached. Retry after a short wait.

- `error` (string, required) — A stable machine-readable code such as `invalid_input`. Authentication failures (401) carry a short sentence here instead of a code.
- `message` (string, optional) — A human-readable explanation, safe to log. The wording may change.

### 503 Service Unavailable Error

The service is temporarily unavailable.

- `error` (string, required) — A stable machine-readable code such as `invalid_input`. Authentication failures (401) carry a short sentence here instead of a code.
- `message` (string, optional) — A human-readable explanation, safe to log. The wording may change.

## Examples

**Request**

```json
{
  "externalUserId": "user_42",
  "type": "device",
  "data": {
    "deviceHash": "d41d8cd98f00b204",
    "ip": "203.0.113.10"
  }
}
```

**Response**

```json
{
  "id": "cm9x2k4m80005"
}
```

**SDK Code**

```python
import requests

url = "https://sandbox-api.toden.co/api/identity/signals"

payload = {
    "externalUserId": "user_42",
    "type": "device",
    "data": {
        "deviceHash": "d41d8cd98f00b204",
        "ip": "203.0.113.10"
    }
}
headers = {
    "Authorization": "Bearer <apiKey>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript
const url = 'https://sandbox-api.toden.co/api/identity/signals';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <apiKey>', 'Content-Type': 'application/json'},
  body: '{"externalUserId":"user_42","type":"device","data":{"deviceHash":"d41d8cd98f00b204","ip":"203.0.113.10"}}'
};

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://sandbox-api.toden.co/api/identity/signals"

	payload := strings.NewReader("{\n  \"externalUserId\": \"user_42\",\n  \"type\": \"device\",\n  \"data\": {\n    \"deviceHash\": \"d41d8cd98f00b204\",\n    \"ip\": \"203.0.113.10\"\n  }\n}")

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

	req.Header.Add("Authorization", "Bearer <apiKey>")
	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://sandbox-api.toden.co/api/identity/signals")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <apiKey>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"externalUserId\": \"user_42\",\n  \"type\": \"device\",\n  \"data\": {\n    \"deviceHash\": \"d41d8cd98f00b204\",\n    \"ip\": \"203.0.113.10\"\n  }\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://sandbox-api.toden.co/api/identity/signals")
  .header("Authorization", "Bearer <apiKey>")
  .header("Content-Type", "application/json")
  .body("{\n  \"externalUserId\": \"user_42\",\n  \"type\": \"device\",\n  \"data\": {\n    \"deviceHash\": \"d41d8cd98f00b204\",\n    \"ip\": \"203.0.113.10\"\n  }\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://sandbox-api.toden.co/api/identity/signals', [
  'body' => '{
  "externalUserId": "user_42",
  "type": "device",
  "data": {
    "deviceHash": "d41d8cd98f00b204",
    "ip": "203.0.113.10"
  }
}',
  'headers' => [
    'Authorization' => 'Bearer <apiKey>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://sandbox-api.toden.co/api/identity/signals");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <apiKey>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"externalUserId\": \"user_42\",\n  \"type\": \"device\",\n  \"data\": {\n    \"deviceHash\": \"d41d8cd98f00b204\",\n    \"ip\": \"203.0.113.10\"\n  }\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "Bearer <apiKey>",
  "Content-Type": "application/json"
]
let parameters = [
  "externalUserId": "user_42",
  "type": "device",
  "data": [
    "deviceHash": "d41d8cd98f00b204",
    "ip": "203.0.113.10"
  ]
] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://sandbox-api.toden.co/api/identity/signals")! 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()
```