curl --request POST \
  --url https://api.checkfu.com/v1/sessions/preview \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'checkfu-version: <checkfu-version>' \
  --data '
{
  "agent": "<string>",
  "environment_id": "<string>",
  "expected_resolution": "<string>",
  "initial_events": [
    {
      "type": "user.message",
      "content": [
        {
          "type": "text",
          "text": "<string>"
        }
      ]
    }
  ],
  "metadata": {},
  "resources": [
    {
      "authorization_token": "<string>",
      "type": "github_repository",
      "url": "<string>",
      "checkout": {
        "type": "branch",
        "name": "<string>"
      },
      "mount_path": "<string>"
    }
  ],
  "title": "<string>",
  "vault_ids": [
    "<string>"
  ],
  "acted_as": "<string>"
}
'

import requests

url = "https://api.checkfu.com/v1/sessions/preview"

payload = {
    "agent": "<string>",
    "environment_id": "<string>",
    "expected_resolution": "<string>",
    "initial_events": [
        {
            "type": "user.message",
            "content": [
                {
                    "type": "text",
                    "text": "<string>"
                }
            ]
        }
    ],
    "metadata": {},
    "resources": [
        {
            "authorization_token": "<string>",
            "type": "github_repository",
            "url": "<string>",
            "checkout": {
                "type": "branch",
                "name": "<string>"
            },
            "mount_path": "<string>"
        }
    ],
    "title": "<string>",
    "vault_ids": ["<string>"],
    "acted_as": "<string>"
}
headers = {
    "checkfu-version": "<checkfu-version>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'checkfu-version': '<checkfu-version>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    agent: '<string>',
    environment_id: '<string>',
    expected_resolution: '<string>',
    initial_events: [{type: 'user.message', content: [{type: 'text', text: '<string>'}]}],
    metadata: {},
    resources: [
      {
        authorization_token: '<string>',
        type: 'github_repository',
        url: '<string>',
        checkout: {type: 'branch', name: '<string>'},
        mount_path: '<string>'
      }
    ],
    title: '<string>',
    vault_ids: ['<string>'],
    acted_as: '<string>'
  })
};

fetch('https://api.checkfu.com/v1/sessions/preview', 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.checkfu.com/v1/sessions/preview",
  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([
    'agent' => '<string>',
    'environment_id' => '<string>',
    'expected_resolution' => '<string>',
    'initial_events' => [
        [
                'type' => 'user.message',
                'content' => [
                                [
                                                                'type' => 'text',
                                                                'text' => '<string>'
                                ]
                ]
        ]
    ],
    'metadata' => [
        
    ],
    'resources' => [
        [
                'authorization_token' => '<string>',
                'type' => 'github_repository',
                'url' => '<string>',
                'checkout' => [
                                'type' => 'branch',
                                'name' => '<string>'
                ],
                'mount_path' => '<string>'
        ]
    ],
    'title' => '<string>',
    'vault_ids' => [
        '<string>'
    ],
    'acted_as' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "checkfu-version: <checkfu-version>"
  ],
]);

$response = curl_exec($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.checkfu.com/v1/sessions/preview"

	payload := strings.NewReader("{\n  \"agent\": \"<string>\",\n  \"environment_id\": \"<string>\",\n  \"expected_resolution\": \"<string>\",\n  \"initial_events\": [\n    {\n      \"type\": \"user.message\",\n      \"content\": [\n        {\n          \"type\": \"text\",\n          \"text\": \"<string>\"\n        }\n      ]\n    }\n  ],\n  \"metadata\": {},\n  \"resources\": [\n    {\n      \"authorization_token\": \"<string>\",\n      \"type\": \"github_repository\",\n      \"url\": \"<string>\",\n      \"checkout\": {\n        \"type\": \"branch\",\n        \"name\": \"<string>\"\n      },\n      \"mount_path\": \"<string>\"\n    }\n  ],\n  \"title\": \"<string>\",\n  \"vault_ids\": [\n    \"<string>\"\n  ],\n  \"acted_as\": \"<string>\"\n}")

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

	req.Header.Add("checkfu-version", "<checkfu-version>")
	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(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.checkfu.com/v1/sessions/preview")
  .header("checkfu-version", "<checkfu-version>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"agent\": \"<string>\",\n  \"environment_id\": \"<string>\",\n  \"expected_resolution\": \"<string>\",\n  \"initial_events\": [\n    {\n      \"type\": \"user.message\",\n      \"content\": [\n        {\n          \"type\": \"text\",\n          \"text\": \"<string>\"\n        }\n      ]\n    }\n  ],\n  \"metadata\": {},\n  \"resources\": [\n    {\n      \"authorization_token\": \"<string>\",\n      \"type\": \"github_repository\",\n      \"url\": \"<string>\",\n      \"checkout\": {\n        \"type\": \"branch\",\n        \"name\": \"<string>\"\n      },\n      \"mount_path\": \"<string>\"\n    }\n  ],\n  \"title\": \"<string>\",\n  \"vault_ids\": [\n    \"<string>\"\n  ],\n  \"acted_as\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.checkfu.com/v1/sessions/preview")

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

request = Net::HTTP::Post.new(url)
request["checkfu-version"] = '<checkfu-version>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"agent\": \"<string>\",\n  \"environment_id\": \"<string>\",\n  \"expected_resolution\": \"<string>\",\n  \"initial_events\": [\n    {\n      \"type\": \"user.message\",\n      \"content\": [\n        {\n          \"type\": \"text\",\n          \"text\": \"<string>\"\n        }\n      ]\n    }\n  ],\n  \"metadata\": {},\n  \"resources\": [\n    {\n      \"authorization_token\": \"<string>\",\n      \"type\": \"github_repository\",\n      \"url\": \"<string>\",\n      \"checkout\": {\n        \"type\": \"branch\",\n        \"name\": \"<string>\"\n      },\n      \"mount_path\": \"<string>\"\n    }\n  ],\n  \"title\": \"<string>\",\n  \"vault_ids\": [\n    \"<string>\"\n  ],\n  \"acted_as\": \"<string>\"\n}"

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

{
  "type": "session_preview",
  "resolution_digest": "<string>",
  "agent": {
    "id": "<string>",
    "connection_bindings": [
      {
        "name": "<string>",
        "connection_id": "<string>",
        "provider": "<string>",
        "provider_package_digest": "<string>",
        "connection_revision_id": "<string>",
        "capability_snapshot_id": "<string>",
        "capability_snapshot_digest": "<string>",
        "tools": [
          {
            "name": "<string>",
            "digest": "<string>"
          }
        ]
      }
    ],
    "description": "<string>",
    "harness": "<string>",
    "mcp_servers": [
      {
        "type": "url",
        "name": "<string>",
        "url": "<string>"
      }
    ],
    "model": {
      "id": "<string>",
      "effort": {
        "type": "low"
      },
      "inference_geo": "global",
      "speed": "standard",
      "provider": "<string>",
      "model_credential_id": "<string>"
    },
    "name": "<string>",
    "skills": [
      {
        "type": "anthropic",
        "skill_id": "<string>",
        "version": "<string>"
      }
    ],
    "system": "<string>",
    "tools": [
      {
        "type": "agent_toolset_20260401",
        "configs": [
          {
            "name": "bash",
            "type": "bash",
            "enabled": true,
            "permission_policy": {
              "type": "auto"
            }
          }
        ],
        "default_config": {
          "enabled": true,
          "permission_policy": {
            "type": "auto"
          }
        }
      }
    ],
    "type": "agent",
    "version": 123,
    "skill_selection": {
      "type": "listed",
      "skills": [
        {
          "type": "anthropic",
          "skill_id": "<string>",
          "version": "<string>"
        }
      ]
    }
  },
  "environment": {
    "id": "<string>",
    "archived_at": "<string>",
    "config": {
      "type": "cloud",
      "networking": {
        "type": "unrestricted"
      },
      "packages": {
        "apt": [
          "<string>"
        ],
        "cargo": [
          "<string>"
        ],
        "gem": [
          "<string>"
        ],
        "go": [
          "<string>"
        ],
        "npm": [
          "<string>"
        ],
        "pip": [
          "<string>"
        ],
        "type": "packages"
      }
    },
    "created_at": "<string>",
    "description": "<string>",
    "metadata": {},
    "name": "<string>",
    "type": "environment",
    "updated_at": "<string>",
    "scope": "organization"
  },
  "resources": [
    {
      "authorization_token": "<string>",
      "type": "github_repository",
      "url": "<string>",
      "checkout": {
        "type": "branch",
        "name": "<string>"
      },
      "mount_path": "<string>"
    }
  ],
  "model_routing": {
    "routing_policy": "cheapest_sufficient",
    "eligible_candidates": [],
    "access_intents": [],
    "original_published_profile": {
      "id": "<string>",
      "version_id": "<string>",
      "version": 123,
      "content_sha256": "<string>"
    }
  }
}

{
  "error": {
    "type": "validation.malformed",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#validation-malformed"
  }
}

{
  "error": {
    "type": "auth.invalid_key",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#auth-invalid-key"
  }
}

{
  "error": {
    "type": "auth.disabled_tenancy",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#auth-disabled-tenancy"
  }
}

{
  "error": {
    "type": "validation.not_found",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#validation-not-found"
  }
}

{
  "error": {
    "type": "validation.conflict",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#validation-conflict"
  }
}

{
  "error": {
    "type": "runtime.harness_incompatible",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#runtime-harness-incompatible"
  }
}

{
  "error": {
    "type": "budget.exceeded",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#budget-exceeded"
  }
}

{
  "error": {
    "type": "runtime.internal",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#runtime-internal"
  }
}

{
  "error": {
    "type": "auth.authorization_unavailable",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#auth-authorization-unavailable"
  }
}