> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://documentation.sayari.com/api/api-reference/attributes/post-attribute/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://documentation.sayari.com/_mcp/server.

# Post Attribute

POST https://api.sayari.com/v1/attribute
Content-Type: application/json

Adds a new attribute to an entity in the project

Reference: https://documentation.sayari.com/api/api-reference/attributes/post-attribute

## Authentication

- OAuth2 — send the obtained token as `Authorization: Bearer <token>`

## Servers

- `https://api.sayari.com` (Production, default)
- `https://api.internal.sayari.com` (Dev)
- `https://api.uk.sayari.com` (Production_UK)

## Request

### Body (application/json)

This endpoint expects an AddAttribute.

- `entity` (string, required) — entity ID
- `type` (string, required) — type of additional information
- `value` (any, required) — value of additional information in JSON format
- `date` (string, optional) — as of date of the attribute
- `from_date` (string, optional) — start date of the attribute
- `to_date` (string, optional) — end date of the attribute

## Response

### 200

- `data` (AttributeResponseData, required)

## Errors

### 400 Bad Request

- `any`

### 401 Unauthorized

- `any`

### 405 Method Not Allowed

- `status` (integer, required)
- `message` (list of string, required)
- `success` (boolean, required)

### 429 Rate Limit Exceeded

- `any`

### 500 Internal Server Error

- `any`

### 502 Bad Gateway

- `any`

### 520 Connection Error

- `any`

## Types

### AttributeResponseData

- `value` (any, required)
- `properties` (list of AttributeProperties, required)

### AttributeProperties

- `editable` (boolean, required)
- `record_count` (integer, required)
- `id` (string, required)

## Examples

**Request**

```json
{
  "entity": "zq04axX2dLn9tE6W6Q8Qhg",
  "type": "address",
  "value": {
    "street1": "1600 Pennsylvania Avenue NW",
    "city": "Washington DC",
    "state": "Washington DC",
    "postalCode": "20500",
    "country": "US"
  },
  "date": "2024-02-15",
  "from_date": "2024-01-01",
  "to_date": "2024-04-30"
}
```

**Response**

```json
{
  "data": {
    "value": {
      "street1": "1600 Pennsylvania Avenue NW",
      "city": "Washington DC",
      "state": "Washington DC",
      "postalCode": "20500",
      "country": "US"
    },
    "properties": [
      {
        "editable": true,
        "record_count": 0,
        "id": "enEwNGF4WDJkTG45dEU2VzZROFFoZ3xhZGRyZXNzfDBwbEVCMHxVNzhzN21yOUVFTThIZ3pwREM3UDFB"
      }
    ]
  }
}
```

**SDK Code**

```python
import requests

url = "https://api.sayari.com/v1/attribute"

payload = {
    "entity": "zq04axX2dLn9tE6W6Q8Qhg",
    "type": "address",
    "value": {
        "street1": "1600 Pennsylvania Avenue NW",
        "city": "Washington DC",
        "state": "Washington DC",
        "postalCode": "20500",
        "country": "US"
    },
    "date": "2024-02-15",
    "from_date": "2024-01-01",
    "to_date": "2024-04-30"
}
headers = {
    "Authorization": "<token>.",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```typescript
import { SayariClient } from "sayari";

const sayari = new SayariClient({ clientId: "YOUR_CLIENT_ID", clientSecret: "YOUR_CLIENT_SECRET" });
await sayari.attributes.postAttribute({
    entity: "zq04axX2dLn9tE6W6Q8Qhg",
    type: "address",
    value: {
        "street1": "1600 Pennsylvania Avenue NW",
        "city": "Washington DC",
        "state": "Washington DC",
        "postalCode": "20500",
        "country": "US"
    },
    toDate: "2024-04-30",
    fromDate: "2024-01-01",
    date: "2024-02-15"
});

```

```go
package main

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

func main() {

	url := "https://api.sayari.com/v1/attribute"

	payload := strings.NewReader("{\n  \"entity\": \"zq04axX2dLn9tE6W6Q8Qhg\",\n  \"type\": \"address\",\n  \"value\": {\n    \"street1\": \"1600 Pennsylvania Avenue NW\",\n    \"city\": \"Washington DC\",\n    \"state\": \"Washington DC\",\n    \"postalCode\": \"20500\",\n    \"country\": \"US\"\n  },\n  \"date\": \"2024-02-15\",\n  \"from_date\": \"2024-01-01\",\n  \"to_date\": \"2024-04-30\"\n}")

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

	req.Header.Add("Authorization", "<token>.")
	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.sayari.com/v1/attribute")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<token>.'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"entity\": \"zq04axX2dLn9tE6W6Q8Qhg\",\n  \"type\": \"address\",\n  \"value\": {\n    \"street1\": \"1600 Pennsylvania Avenue NW\",\n    \"city\": \"Washington DC\",\n    \"state\": \"Washington DC\",\n    \"postalCode\": \"20500\",\n    \"country\": \"US\"\n  },\n  \"date\": \"2024-02-15\",\n  \"from_date\": \"2024-01-01\",\n  \"to_date\": \"2024-04-30\"\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.sayari.com/v1/attribute")
  .header("Authorization", "<token>.")
  .header("Content-Type", "application/json")
  .body("{\n  \"entity\": \"zq04axX2dLn9tE6W6Q8Qhg\",\n  \"type\": \"address\",\n  \"value\": {\n    \"street1\": \"1600 Pennsylvania Avenue NW\",\n    \"city\": \"Washington DC\",\n    \"state\": \"Washington DC\",\n    \"postalCode\": \"20500\",\n    \"country\": \"US\"\n  },\n  \"date\": \"2024-02-15\",\n  \"from_date\": \"2024-01-01\",\n  \"to_date\": \"2024-04-30\"\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.sayari.com/v1/attribute', [
  'body' => '{
  "entity": "zq04axX2dLn9tE6W6Q8Qhg",
  "type": "address",
  "value": {
    "street1": "1600 Pennsylvania Avenue NW",
    "city": "Washington DC",
    "state": "Washington DC",
    "postalCode": "20500",
    "country": "US"
  },
  "date": "2024-02-15",
  "from_date": "2024-01-01",
  "to_date": "2024-04-30"
}',
  'headers' => [
    'Authorization' => '<token>.',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://api.sayari.com/v1/attribute");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "<token>.");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"entity\": \"zq04axX2dLn9tE6W6Q8Qhg\",\n  \"type\": \"address\",\n  \"value\": {\n    \"street1\": \"1600 Pennsylvania Avenue NW\",\n    \"city\": \"Washington DC\",\n    \"state\": \"Washington DC\",\n    \"postalCode\": \"20500\",\n    \"country\": \"US\"\n  },\n  \"date\": \"2024-02-15\",\n  \"from_date\": \"2024-01-01\",\n  \"to_date\": \"2024-04-30\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "<token>.",
  "Content-Type": "application/json"
]
let parameters = [
  "entity": "zq04axX2dLn9tE6W6Q8Qhg",
  "type": "address",
  "value": [
    "street1": "1600 Pennsylvania Avenue NW",
    "city": "Washington DC",
    "state": "Washington DC",
    "postalCode": "20500",
    "country": "US"
  ],
  "date": "2024-02-15",
  "from_date": "2024-01-01",
  "to_date": "2024-04-30"
] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.sayari.com/v1/attribute")! 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()
```