curl --request POST \
  --url https://api.siftstack.com/api/v1/calculated-channels:validate-expression \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "expression": {
    "expression": "<string>",
    "channelReferences": {},
    "expressionChannelReferences": [
      {
        "channelReference": "<string>",
        "channelId": "<string>"
      }
    ],
    "functionDependencies": [
      {
        "userDefinedFunctionVersionId": "<string>"
      }
    ]
  },
  "mode": "EXPRESSION_MODE_UNSPECIFIED"
}
'

import requests

url = "https://api.siftstack.com/api/v1/calculated-channels:validate-expression"

payload = {
    "expression": {
        "expression": "<string>",
        "channelReferences": {},
        "expressionChannelReferences": [
            {
                "channelReference": "<string>",
                "channelId": "<string>"
            }
        ],
        "functionDependencies": [{ "userDefinedFunctionVersionId": "<string>" }]
    },
    "mode": "EXPRESSION_MODE_UNSPECIFIED"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

package main

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

func main() {

	url := "https://api.siftstack.com/api/v1/calculated-channels:validate-expression"

	payload := strings.NewReader("{\n  \"expression\": {\n    \"expression\": \"<string>\",\n    \"channelReferences\": {},\n    \"expressionChannelReferences\": [\n      {\n        \"channelReference\": \"<string>\",\n        \"channelId\": \"<string>\"\n      }\n    ],\n    \"functionDependencies\": [\n      {\n        \"userDefinedFunctionVersionId\": \"<string>\"\n      }\n    ]\n  },\n  \"mode\": \"EXPRESSION_MODE_UNSPECIFIED\"\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(string(body))

}

{
  "error": {
    "errorMessage": "<string>"
  },
  "success": {
    "dataType": "CHANNEL_DATA_TYPE_UNSPECIFIED"
  }
}

{
  "code": 123,
  "message": "<string>",
  "details": [
    {
      "@type": "<string>"
    }
  ]
}