使用CoinGecko和ExchangeRate-API创建BTC-ETH价格和美元汇率API

• •HTTP Webhook 端点（n8n 会自动生成）
• •可能需要目标 API 的认证凭证

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      "webhookId": "9cb6d3c6-0ff2-4ff4-a992-4b8ebc27de72",
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      "id": "53645dd6-4117-4e41-b958-5d3bfc022f6a",
      "name": "Get Fiat Exchange Rates",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
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      "parameters": {
        "url": "https://api.exchangerate-api.com/v4/latest/USD",
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    {
      "id": "9d0c77d1-67bc-4030-93d2-75ca981bb504",
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      "position": [
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      "parameters": {
        "url": "https://api.coingecko.com/api/v3/simple/price?ids=bitcoin,ethereum&vs_currencies=usd&include_24hr_change=true",
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        "jsCode": "let fx,cg;for(const it of $input.all()){ if(it.json?.rates) fx=it.json; if(it.json?.bitcoin) cg=it.json; }\nconst payload={\n  btc:{ price: cg?.bitcoin?.usd ?? null, change_24h: cg?.bitcoin?.usd_24h_change ?? null },\n  eth:{ price: cg?.ethereum?.usd ?? null, change_24h: cg?.ethereum?.usd_24h_change ?? null },\n  usd_eur: fx?.rates?.EUR ?? null,\n  usd_ngn: fx?.rates?.NGN ?? null,\n  ts: new Date().toISOString()\n};\nreturn [{json: payload}];"
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        "content": "## 🌐 Crypto + FX Micro-API (Webhook JSON)\n\n**What it does:**  \nExposes a lightweight **GET** endpoint that returns **BTC/ETH price + 24h %** and **USD→EUR / USD→NGN** in clean JSON.\n\n**Route:**  \n`/webhook/crypto-fx` (use n8n’s Test or Production URL)\n\n**Flow:**  \n**Webhook (GET)** → ExchangeRate-API → CoinGecko → **Merge** → **Code (build JSON)** → **Respond**\n\n**Example Response:**  \n```json\n{\n  \"btc\": { \"price\": 112417, \"change_24h\": 1.22 },\n  \"eth\": { \"price\": 4334.57, \"change_24h\": 1.33 },\n  \"usd_eur\": 0.854,\n  \"usd_ngn\": 1524.54,\n  \"ts\": \"2025-09-08T08:00:00.000Z\"\n}\n"
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            "node": "Get Fiat Exchange Rates",
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