Projeto 4 - API Pessoal Com Webhook

The workflow JSON

Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →

{
  "name": "Projeto 4 - API Pessoal com Webhook",
  "nodes": [
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "sentiment",
        "responseMode": "responseNode",
        "options": {}
      },
      "id": "a1b2c3d4-0001-0001-0001-000000000001",
      "name": "Webhook",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2,
      "position": [
        240,
        300
      ]
    },
    {
      "parameters": {
        "resource": "chat",
        "operation": "message",
        "modelId": {
          "__rl": true,
          "value": "gpt-4o-mini",
          "mode": "list",
          "cachedResultName": "gpt-4o-mini"
        },
        "messages": {
          "values": [
            {
              "content": "Voce e um analisador de sentimentos e extrator de palavras-chave. Analise o texto recebido e retorne SOMENTE um JSON valido (sem markdown, sem explicacoes) com este formato exato:\n{\n  \"sentimento\": \"positivo\" | \"negativo\" | \"neutro\",\n  \"confianca\": 0.00,\n  \"palavras_chave\": [\"palavra1\", \"palavra2\", \"palavra3\"]\n}\n\nRegras:\n- sentimento: exatamente uma das tres opcoes\n- confianca: numero de 0.00 a 1.00 indicando certeza da classificacao\n- palavras_chave: lista com 3 a 5 palavras mais relevantes do texto\n- Retorne APENAS o JSON, sem nenhum texto adicional"
            },
            {
              "role": "user",
              "content": "={{ $json.body.texto }}"
            }
          ]
        },
        "options": {
          "temperature": 0.2
        }
      },
      "id": "a1b2c3d4-0002-0002-0002-000000000002",
      "name": "OpenAI - Analisar Sentimento",
      "type": "@n8n/n8n-nodes-langchain.openAi",
      "typeVersion": 1.4,
      "position": [
        480,
        300
      ],
      "credentials": {
        "openAiApi": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "jsCode": "const resposta = $input.first().json.message.content;\n\nlet resultado;\ntry {\n  resultado = JSON.parse(resposta);\n} catch (e) {\n  const jsonMatch = resposta.match(/\\{[\\s\\S]*\\}/);\n  if (jsonMatch) {\n    resultado = JSON.parse(jsonMatch[0]);\n  } else {\n    throw new Error('OpenAI nao retornou JSON valido: ' + resposta);\n  }\n}\n\nconst sentimentosValidos = ['positivo', 'negativo', 'neutro'];\nif (!sentimentosValidos.includes(resultado.sentimento)) {\n  throw new Error('Sentimento invalido: ' + resultado.sentimento);\n}\n\nreturn {\n  sentimento: resultado.sentimento,\n  confianca: parseFloat(resultado.confianca.toFixed(2)),\n  palavras_chave: resultado.palavras_chave\n};"
      },
      "id": "a1b2c3d4-0003-0003-0003-000000000003",
      "name": "Formatar Resposta",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        720,
        300
      ]
    },
    {
      "parameters": {
        "respondWith": "json",
        "responseBody": "={{ JSON.stringify($json) }}",
        "options": {
          "responseCode": 200,
          "responseHeaders": {
            "entries": [
              {
                "name": "Content-Type",
                "value": "application/json"
              }
            ]
          }
        }
      },
      "id": "a1b2c3d4-0004-0004-0004-000000000004",
      "name": "Respond JSON",
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.1,
      "position": [
        960,
        300
      ]
    }
  ],
  "connections": {
    "Webhook": {
      "main": [
        [
          {
            "node": "OpenAI - Analisar Sentimento",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "OpenAI - Analisar Sentimento": {
      "main": [
        [
          {
            "node": "Formatar Resposta",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Formatar Resposta": {
      "main": [
        [
          {
            "node": "Respond JSON",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "active": false,
  "settings": {
    "executionOrder": "v1"
  },
  "versionId": "projeto4-v1"
}

Credentials you'll need

Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.

• openAiApi

About this workflow

Projeto 4 - API Pessoal com Webhook. Uses openAi. Webhook trigger; 4 nodes.

Source: https://github.com/NaiaraRodrigues-naih/kensei-n8n-automacao-semana5/blob/master/semana-05/04_api_sentimento.json — original creator credit. Request a take-down →

More AI & RAG workflows → · Browse all categories →

Related workflows

Workflows that share integrations, category, or trigger type with this one. All free to copy and import.