Dify APIの使い方完全ガイド：ワークフローをAPI化してアプリに組み込む方法

curl --location --request POST 'https://api.dify.ai/v1/chat-messages' \
--header 'Authorization: Bearer {YOUR_API_KEY}' \
--header 'Content-Type: application/json' \
--data-raw '{
  "inputs": {},
  "query": "こんにちは、今日のニュースを教えてください",
  "response_mode": "blocking",
  "conversation_id": "",
  "user": "user-001"
}'

curl --location --request POST 'https://api.dify.ai/v1/workflows/run' \
--header 'Authorization: Bearer {YOUR_API_KEY}' \
--header 'Content-Type: application/json' \
--data-raw '{
  "inputs": {
    "URL": "https://example.com/article",
    "count": 120
  },
  "response_mode": "blocking",
  "user": "user-001"
}'

import requests
import os

def run_dify_workflow(inputs: dict, user: str = "default-user"):
    api_key = os.environ.get("DIFY_API_KEY")
    base_url = os.environ.get("DIFY_BASE_URL", "https://api.dify.ai")
    url = f"{base_url}/v1/workflows/run"
    
    headers = {
        "Authorization": f"Bearer {api_key}",
        "Content-Type": "application/json"
    }
    
    payload = {
        "inputs": inputs,
        "response_mode": "blocking",
        "user": user
    }
    
    response = requests.post(url, headers=headers, json=payload)
    
    if response.status_code == 200:
        result = response.json()
        return result["data"]["outputs"]
    else:
        raise Exception(f"Error {response.status_code}: {response.text}")

# 使用例
outputs = run_dify_workflow(
    inputs={"topic": "AI活用事例", "language": "ja"},
    user="user-001"
)
print(outputs)

function runDifyWorkflow() {
  const API_KEY = PropertiesService.getScriptProperties()
    .getProperty("DIFY_API_KEY");
  
  const headers = {
    "Authorization": "Bearer " + API_KEY,
    "Content-Type": "application/json"
  };
  
  const payload = {
    "inputs": {
      "URL": "https://example.com/article",
      "count": 120
    },
    "response_mode": "blocking",
    "user": "gas-user"
  };
  
  const options = {
    "method": "post",
    "payload": JSON.stringify(payload),
    "headers": headers,
    "muteHttpExceptions": true
  };
  
  const response = UrlFetchApp.fetch(
    "https://api.dify.ai/v1/workflows/run",
    options
  );
  
  if (response.getResponseCode() === 200) {
    const result = JSON.parse(response.getContentText());
    Logger.log(result.data.outputs);
  } else {
    Logger.log("Error: " + response.getContentText());
  }
}