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# Add item to surface

POST https://api.runtype.com/v1/products/{id}/surfaces/{surfaceId}/items
Content-Type: application/json

Add a capability item to a surface.

Reference: https://docs.runtype.com/api-reference/runtype-api/products/add-item-to-surface

## Authentication

- `Authorization` header (bearer token, required) — API key or Clerk session token

## Servers

- `https://api.runtype.com` (Production, default)
- `https://api.runtype-staging.com` (Staging)

## Request

### Path parameters

- `id` (string, required)
- `surfaceId` (string, required)

### Body (application/json)

This endpoint expects an object.

- `capabilityId` (string, required)
- `enabled` (boolean, optional)
- `endpointSlug` (string, optional)
- `exposedDescription` (string, optional)
- `exposedName` (string, optional)
- `isEntryPoint` (boolean, optional)
- `presentation` (V1ProductsIdSurfacesSurfaceIdItemsPostRequestBodyContentApplicationJsonSchemaPresentation, optional)

## Response

### 201

Surface item added

- `capabilityId` (string, required)
- `createdAt` (string, required)
- `displayOrder` (integer, required, nullable)
- `enabled` (boolean, required)
- `endpointSlug` (string, required, nullable)
- `exposedDescription` (string, required, nullable)
- `exposedName` (string, required, nullable)
- `id` (string, required)
- `isEntryPoint` (boolean, required)
- `surfaceId` (string, required)
- `warnings` (list of V1ProductsIdSurfacesSurfaceIdItemsPostResponsesContentApplicationJsonSchemaWarningsItems, optional) — Advisory findings about this binding. Present only when non-empty; never blocks the mutation.

## Errors

### 400 Bad Request Error

Validation error

- `error` (string, required)
- `code` (string, optional) — Stable error code. `insufficient_scope` marks an API key that lacks a scope this request needs.
- `details` (list of ErrorDetailsItems, optional)
- `requiredScopes` (list of string, optional) — On `insufficient_scope`: every API key scope this request needs.

### 401 Unauthorized Error

Unauthorized

- `error` (string, required)
- `code` (string, optional) — Stable error code. `insufficient_scope` marks an API key that lacks a scope this request needs.
- `details` (list of ErrorDetailsItems, optional)
- `requiredScopes` (list of string, optional) — On `insufficient_scope`: every API key scope this request needs.

### 403 Forbidden Error

Insufficient permissions

- `error` (string, required)
- `code` (string, optional) — Stable error code. `insufficient_scope` marks an API key that lacks a scope this request needs.
- `details` (list of ErrorDetailsItems, optional)
- `requiredScopes` (list of string, optional) — On `insufficient_scope`: every API key scope this request needs.

### 404 Not Found Error

Product, surface, or capability not found

- `error` (string, required)
- `code` (string, optional) — Stable error code. `insufficient_scope` marks an API key that lacks a scope this request needs.
- `details` (list of ErrorDetailsItems, optional)
- `requiredScopes` (list of string, optional) — On `insufficient_scope`: every API key scope this request needs.

### 409 Conflict Error

Capability already added to this surface

- `error` (string, required)
- `code` (string, optional) — Stable error code. `insufficient_scope` marks an API key that lacks a scope this request needs.
- `details` (list of ErrorDetailsItems, optional)
- `requiredScopes` (list of string, optional) — On `insufficient_scope`: every API key scope this request needs.

### 500 Internal Server Error

Internal server error

- `error` (string, required)
- `code` (string, optional) — Stable error code. `insufficient_scope` marks an API key that lacks a scope this request needs.
- `details` (list of ErrorDetailsItems, optional)
- `requiredScopes` (list of string, optional) — On `insufficient_scope`: every API key scope this request needs.

## Types

### V1ProductsIdSurfacesSurfaceIdItemsPostRequestBodyContentApplicationJsonSchemaPresentation

- `displayLabel` (string, required)
- `displayMode` (enum, required)
  - Allowed values: `chat`, `form`, `document`
- `route` (string, required)
- `displayIcon` (string, optional)
- `displayOrder` (integer, optional, default: 0)
- `formConfig` (V1ProductsIdSurfacesSurfaceIdItemsPostRequestBodyContentApplicationJsonSchemaPresentationFormConfig, optional)
- `isDefault` (boolean, optional, default: false)
- `visibility` (enum, optional, default: auth-only)
  - Allowed values: `public`, `auth-only`

### V1ProductsIdSurfacesSurfaceIdItemsPostResponsesContentApplicationJsonSchemaWarningsItems

- `code` (string, required) — Stable advisory code: `APPROVAL_UNANSWERABLE_ON_SURFACE` when an approval-gated agent is bound to a surface with no human to answer the prompt, or `APPROVAL_REPLY_CAPTURE_ON_SURFACE` when the pairing works but the decision is read from the reply the person texts back.
- `message` (string, required)
- `path` (string, required)
- `severity` (enum, required)
  - Allowed values: `warning`, `recommendation`
- `suggestedFix` (string, optional)

### ErrorDetailsItems

- `message` (string, required)
- `code` (string, optional) — Stable Runtype validation code (e.g. MISSING_REQUIRED_FIELD, INVALID_ENUM).
- `path` (string, optional) — Dotted JSON path to the offending field.
- `suggestion` (string, optional) — Actionable hint (allowed values, accepted range, …).

### V1ProductsIdSurfacesSurfaceIdItemsPostRequestBodyContentApplicationJsonSchemaPresentationFormConfig

- `inputSchemaOverrides` (map from string to any, optional)
- `submitButtonLabel` (string, optional)
- `successMessage` (string, optional)

## Examples

**Request**

```json
{
  "capabilityId": "prodcap_abc123",
  "exposedName": "answer-questions"
}
```

**Response**

```json
{
  "capabilityId": "string",
  "createdAt": "string",
  "displayOrder": 1,
  "enabled": true,
  "endpointSlug": "string",
  "exposedDescription": "string",
  "exposedName": "string",
  "id": "string",
  "isEntryPoint": true,
  "surfaceId": "string",
  "warnings": [
    {
      "code": "string",
      "message": "string",
      "path": "string",
      "severity": "warning",
      "suggestedFix": "string"
    }
  ]
}
```

**SDK Code**

```python Add Capability to Surface
import requests

url = "https://api.runtype.com/v1/products/id/surfaces/surfaceId/items"

payload = {
    "capabilityId": "prodcap_abc123",
    "exposedName": "answer-questions"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript Add Capability to Surface
const url = 'https://api.runtype.com/v1/products/id/surfaces/surfaceId/items';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"capabilityId":"prodcap_abc123","exposedName":"answer-questions"}'
};

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

```go Add Capability to Surface
package main

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

func main() {

	url := "https://api.runtype.com/v1/products/id/surfaces/surfaceId/items"

	payload := strings.NewReader("{\n  \"capabilityId\": \"prodcap_abc123\",\n  \"exposedName\": \"answer-questions\"\n}")

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

	req.Header.Add("Authorization", "Bearer <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 Add Capability to Surface
require 'uri'
require 'net/http'

url = URI("https://api.runtype.com/v1/products/id/surfaces/surfaceId/items")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"capabilityId\": \"prodcap_abc123\",\n  \"exposedName\": \"answer-questions\"\n}"

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

```java Add Capability to Surface
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.runtype.com/v1/products/id/surfaces/surfaceId/items")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"capabilityId\": \"prodcap_abc123\",\n  \"exposedName\": \"answer-questions\"\n}")
  .asString();
```

```php Add Capability to Surface
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.runtype.com/v1/products/id/surfaces/surfaceId/items', [
  'body' => '{
  "capabilityId": "prodcap_abc123",
  "exposedName": "answer-questions"
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp Add Capability to Surface
using RestSharp;

var client = new RestClient("https://api.runtype.com/v1/products/id/surfaces/surfaceId/items");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"capabilityId\": \"prodcap_abc123\",\n  \"exposedName\": \"answer-questions\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Add Capability to Surface
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [
  "capabilityId": "prodcap_abc123",
  "exposedName": "answer-questions"
] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.runtype.com/v1/products/id/surfaces/surfaceId/items")! 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()
```