AI-Powered Email Writer API

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": "AI Email Writer API",
  "description": null,
  "active": true,
  "isArchived": false,
  "nodes": [
    {
      "parameters": {
        "path": "ai-email-api",
        "responseMode": "responseNode",
        "httpMethod": "POST",
        "options": {
          "responseHeaders": {
            "entries": [
              {
                "name": "Access-Control-Allow-Origin",
                "value": "*"
              },
              {
                "name": "Access-Control-Allow-Headers",
                "value": "Content-Type"
              }
            ]
          }
        }
      },
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2,
      "position": [
        200,
        300
      ],
      "id": "webhook-node",
      "name": "Webhook"
    },
    {
      "parameters": {
        "promptType": "define",
        "text": "=Write an email with the following parameters:\n- Type: {{ $json.body.type || \"professional\" }}\n- Tone: {{ $json.body.tone || \"friendly\" }}\n- Context: {{ $json.body.context || \"general inquiry\" }}\n- Recipient: {{ $json.body.recipient || \"someone\" }}",
        "options": {
          "systemMessage": "You are a professional email writer. You will receive a JSON object with email parameters and must write a complete, well-formatted email.\n\nBased on the input:\n- Email type: The kind of email (professional, casual, follow-up, cold-outreach, thank-you, etc.)\n- Tone: The desired tone (friendly, formal, persuasive, apologetic, etc.)\n- Context: What the email is about\n- Recipient: Who the email is for\n\nWrite a complete email with Subject line and Body. Format it clearly.\nReturn ONLY the email content, nothing else. Start with \"Subject:\" then a blank line then the body."
        }
      },
      "type": "@n8n/n8n-nodes-langchain.agent",
      "typeVersion": 2.2,
      "position": [
        500,
        300
      ],
      "id": "ai-agent-node",
      "name": "AI Agent"
    },
    {
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "gpt-4.1-mini"
        },
        "options": {}
      },
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "typeVersion": 1.2,
      "position": [
        500,
        500
      ],
      "id": "openai-model-node",
      "name": "OpenAI Chat Model",
      "credentials": {
        "openAiApi": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "respondWith": "json",
        "responseBody": "={{ JSON.stringify({ \"email\": $json.output }) }}",
        "options": {
          "responseHeaders": {
            "entries": [
              {
                "name": "Access-Control-Allow-Origin",
                "value": "*"
              },
              {
                "name": "Access-Control-Allow-Headers",
                "value": "Content-Type"
              },
              {
                "name": "Content-Type",
                "value": "application/json"
              }
            ]
          }
        }
      },
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.1,
      "position": [
        800,
        300
      ],
      "id": "respond-node",
      "name": "Respond to Webhook"
    }
  ],
  "connections": {
    "Webhook": {
      "main": [
        [
          {
            "node": "AI Agent",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "OpenAI Chat Model": {
      "ai_languageModel": [
        [
          {
            "node": "AI Agent",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "AI Agent": {
      "main": [
        [
          {
            "node": "Respond to Webhook",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {
    "executionOrder": "v1",
    "callerPolicy": "workflowsFromSameOwner",
    "availableInMCP": false
  },
  "staticData": null,
  "meta": null,
  "activeVersionId": "c1c105bf-a623-4ce2-afcd-a392ddfac24e",
  "versionCounter": 14,
  "triggerCount": 1,
  "shared": [
    {
      "updatedAt": "2026-03-01T23:54:04.135Z",
      "createdAt": "2026-03-01T23:54:04.135Z",
      "role": "workflow:owner",
      "workflowId": "UPQAuic77yXaqmWG",
      "projectId": "jISBlT19NO0fn5mT",
      "project": {
        "updatedAt": "2025-11-19T23:58:51.301Z",
        "createdAt": "2025-11-19T23:57:07.759Z",
        "id": "jISBlT19NO0fn5mT",
        "name": "Armani Cunningham <hamstudios101@gmail.com>",
        "type": "personal",
        "icon": null,
        "description": null,
        "creatorId": "a8e49b89-e536-45ff-8330-fab9f0943ab1"
      }
    }
  ],
  "tags": [],
  "activeVersion": {
    "updatedAt": "2026-03-02T01:03:30.800Z",
    "createdAt": "2026-03-02T01:03:30.800Z",
    "versionId": "c1c105bf-a623-4ce2-afcd-a392ddfac24e",
    "workflowId": "UPQAuic77yXaqmWG",
    "nodes": [
      {
        "parameters": {
          "path": "ai-email-api",
          "responseMode": "responseNode",
          "httpMethod": "POST",
          "options": {
            "responseHeaders": {
              "entries": [
                {
                  "name": "Access-Control-Allow-Origin",
                  "value": "*"
                },
                {
                  "name": "Access-Control-Allow-Headers",
                  "value": "Content-Type"
                }
              ]
            }
          }
        },
        "type": "n8n-nodes-base.webhook",
        "typeVersion": 2,
        "position": [
          200,
          300
        ],
        "id": "webhook-node",
        "name": "Webhook",
        "webhookId": "ai-email-api-wh"
      },
      {
        "parameters": {
          "promptType": "define",
          "text": "=Write an email with the following parameters:\n- Type: {{ $json.body.type || \"professional\" }}\n- Tone: {{ $json.body.tone || \"friendly\" }}\n- Context: {{ $json.body.context || \"general inquiry\" }}\n- Recipient: {{ $json.body.recipient || \"someone\" }}",
          "options": {
            "systemMessage": "You are a professional email writer. You will receive a JSON object with email parameters and must write a complete, well-formatted email.\n\nBased on the input:\n- Email type: The kind of email (professional, casual, follow-up, cold-outreach, thank-you, etc.)\n- Tone: The desired tone (friendly, formal, persuasive, apologetic, etc.)\n- Context: What the email is about\n- Recipient: Who the email is for\n\nWrite a complete email with Subject line and Body. Format it clearly.\nReturn ONLY the email content, nothing else. Start with \"Subject:\" then a blank line then the body."
          }
        },
        "type": "@n8n/n8n-nodes-langchain.agent",
        "typeVersion": 2.2,
        "position": [
          500,
          300
        ],
        "id": "ai-agent-node",
        "name": "AI Agent"
      },
      {
        "parameters": {
          "model": {
            "__rl": true,
            "mode": "list",
            "value": "gpt-4.1-mini"
          },
          "options": {}
        },
        "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
        "typeVersion": 1.2,
        "position": [
          500,
          500
        ],
        "id": "openai-model-node",
        "name": "OpenAI Chat Model",
        "credentials": {
          "openAiApi": {
            "id": "xVvmBQ0k0B49oB4q",
            "name": "n8n free OpenAI API credits"
          }
        }
      },
      {
        "parameters": {
          "respondWith": "json",
          "responseBody": "={{ JSON.stringify({ \"email\": $json.output }) }}",
          "options": {
            "responseHeaders": {
              "entries": [
                {
                  "name": "Access-Control-Allow-Origin",
                  "value": "*"
                },
                {
                  "name": "Access-Control-Allow-Headers",
                  "value": "Content-Type"
                },
                {
                  "name": "Content-Type",
                  "value": "application/json"
                }
              ]
            }
          }
        },
        "type": "n8n-nodes-base.respondToWebhook",
        "typeVersion": 1.1,
        "position": [
          800,
          300
        ],
        "id": "respond-node",
        "name": "Respond to Webhook"
      }
    ],
    "connections": {
      "Webhook": {
        "main": [
          [
            {
              "node": "AI Agent",
              "type": "main",
              "index": 0
            }
          ]
        ]
      },
      "OpenAI Chat Model": {
        "ai_languageModel": [
          [
            {
              "node": "AI Agent",
              "type": "ai_languageModel",
              "index": 0
            }
          ]
        ]
      },
      "AI Agent": {
        "main": [
          [
            {
              "node": "Respond to Webhook",
              "type": "main",
              "index": 0
            }
          ]
        ]
      }
    },
    "authors": "Armani Cunningham",
    "name": null,
    "description": null,
    "autosaved": false,
    "workflowPublishHistory": [
      {
        "createdAt": "2026-03-02T01:03:31.461Z",
        "id": 341,
        "workflowId": "UPQAuic77yXaqmWG",
        "versionId": "c1c105bf-a623-4ce2-afcd-a392ddfac24e",
        "event": "activated",
        "userId": "a8e49b89-e536-45ff-8330-fab9f0943ab1"
      }
    ]
  }
}

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

AI Email Writer API. Uses agent, lmChatOpenAi. Webhook trigger; 4 nodes.

Source: https://github.com/mhmdmnsor292003-arch/free-ai-tools/blob/main/workflows/ai-email-writer-api.json — original creator credit. Request a take-down →

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