I have an automation that, as its final step, is supposed to schedule an appointment via Google Calendar, but it’s not working correctly. The AI agent asks when it wants the appointment, but it schedules it for October, and when it schedules for right now, it doesn’t respect the 30-minute duration; instead, it schedules it for a full hour. It also doesn’t include the specified title, and on top of that, I have to send it another message after I’ve already sent the appointment confirmation just to get it to respond. I’ve been stuck in a loop for hours.
I’ve attached the JSON file in case anyone can help.
Describe the problem/error/question
What is the error message (if any)?
Please share your workflow
name "Evolution API Whatsapp Chatbot for Jordi Fluency Leads CALENDAR DEF (PRUEBAS)"
nodes
0
parameters
httpMethod "POST"
path "whatsapp"
options {}
type "n8n-nodes-base.webhook"
typeVersion 2.1
position
0 -2416
1 64
id "fd108c05-8d9a-413d-9190-b552d60a2fcd"
name "Webhook"
webhookId "5f5a8b82-e018-480a-a88d-972ee080e6f8"
1
parameters
method "POST"
url "http://srv1267323.hstgr.cloud:8080/message/sendText/inmobiliaria"
sendHeaders true
headerParameters
parameters
0
name "apikey"
value "cwffZbOX02vrDZB4kBc8BQXhCdMlcD4D"
sendBody true
specifyBody "json"
jsonBody `={\n "number": "{{ $('Webhook').item.json.body.data.key.remoteJid.replace('@s.whatsapp.net', '') }}",\n "text": "{{ $('AI Agent').item.json.output }}",\n "linkPreview": false\n}`
options {}
type "n8n-nodes-base.httpRequest"
typeVersion 4.3
position
0 -944
1 96
id "e565afe9-8d25-46c8-aa20-1b6bbc61f50d"
name "HTTP Request"
2
parameters
rules
values
0
conditions
options {…}
conditions […]
combinator "and"
renameOutput true
outputKey "Text"
1
conditions
options {…}
conditions […]
combinator "and"
renameOutput true
outputKey "Text With Link"
2
conditions
options {…}
conditions […]
combinator "and"
renameOutput true
outputKey "Audio"
3
conditions
options {…}
conditions […]
combinator "and"
renameOutput true
outputKey "Image"
options {}
type "n8n-nodes-base.switch"
typeVersion 3.4
position
0 -2016
1 48
id "dac7bc13-d685-43ae-b1ff-165df73c8244"
name "Switch"
3
parameters
method "POST"
url "http://srv1267323.hstgr.cloud:8080/chat/getBase64FromMediaMessage/inmobiliaria"
sendHeaders true
headerParameters
parameters
0
name "apikey"
value "cwffZbOX02vrDZB4kBc8BQXhCdMlcD4D"
sendBody true
specifyBody "json"
jsonBody '={{\n {\n "message": $json.body.data,\n "convertToMp4": false\n }\n}}'
options {}
type "n8n-nodes-base.httpRequest"
typeVersion 4.3
position
0 -1728
1 -144
id "57f92dca-d79c-4dd1-9a76-f07fd8d4bb46"
name "Download Audio"
4
parameters
operation "toBinary"
sourceProperty "base64"
options
fileName "voice_note.ogg"
type "n8n-nodes-base.convertToFile"
typeVersion 1.1
position
0 -1536
1 -144
id "61261ba5-c5c2-4b78-a020-61a565206540"
name "Convert to File"
5
parameters
resource "audio"
operation "transcribe"
options {}
type "@n8n/n8n-nodes-langchain.openAi"
typeVersion 2.1
position
0 -1344
1 -144
id "e84064b0-5f2d-4b14-ad53-a5897d2f4c28"
name "Transcribe a recording"
credentials
openAiApi
id "ayMsi7sUQnOVm40G"
name "OpenAi account"
6
parameters
promptType "define"
text "FECHA ACTUAL DEL SISTEMA: {{ $now.toFormat('yyyy-MM-dd HH:mm') }} (Hoy es domingo 8 de Febrero de 2026). Mensaje del usuario: {{ $json.mensaje }}"
options
systemMessage `### ROLE\nEres el Asistente de Inmobiliaria Mora. Tu tono es profesional, breve y directo.\n\n### CONTEXTO TEMPORAL\n- Hoy es: {{ $now.toFormat('cccc, dd LLLL yyyy') }}.\n- ESTAMOS EN FEBRERO DE 2026. Ignora cualquier mensaje antiguo sobre "octubre".\n\n### OBJETIVO\n1. Cualifica (Hipoteca, Tipo, Zona, Presupuesto) uno a uno.\n2. Al tener los 4, pide fecha y hora.\n3. CUANDO TE DEN FECHA Y HORA:\n - USA la herramienta Google Calendar inmediatamente.\n - Start Time: La fecha/hora del usuario.\n - End Time: 30 minutos exactos después del inicio.\n - Summary: "Visita Inmobiliaria - Lead"\n - MUY IMPORTANTE: n8n espera que des una respuesta final después de usar la herramienta. Una vez agendado, DEBES generar un mensaje de texto confirmando: "¡Perfecto! Cita confirmada para el [DIA] a las [HORA]. ¡Nos vemos!". \n\n### RESTRICCIONES\n- No digas que "no tienes acceso" o "no puedes ver disponibilidad". Simplemente agenda.\n- No pidas confirmación para agendar, hazlo directamente cuando te den la hora.`
type "@n8n/n8n-nodes-langchain.agent"
typeVersion 3.1
position
0 -1456
1 96
id "12d1917d-93c7-4a51-919d-78a25d7d4c60"
name "AI Agent"
7
parameters
model
__rl true
value "gpt-4o-mini"
mode "list"
cachedResultName "gpt-4o-mini"
builtInTools {}
options {}
type "@n8n/n8n-nodes-langchain.lmChatOpenAi"
typeVersion 1.3
position
0 -1456
1 272
id "f4998898-9fc9-48db-a0f0-82065e40cec0"
name "OpenAI Chat Model"
credentials
openAiApi
id "ayMsi7sUQnOVm40G"
name "OpenAi account"
8
parameters
sessionIdType "customKey"
sessionKey "={{ $('Webhook').item.json.body.data.key.remoteJid }}_v2"
contextWindowLength 10
type "@n8n/n8n-nodes-langchain.memoryBufferWindow"
typeVersion 1.3
position
0 -1296
1 384
id "a5b2a1f5-fcc3-4903-8e68-ce004a5f9125"
name "Simple Memory"
9
parameters
modelId
__rl true
value "gpt-4o-mini"
mode "list"
cachedResultName "GPT-4O-MINI"
responses
values
0
type "image"
imageType "base64"
1
content "Describe this real estate image in 1 sentence. Is it a room, a house, or a document?"
builtInTools {}
options {}
type "@n8n/n8n-nodes-langchain.openAi"
typeVersion 2.1
position
0 -1568
1 448
id "0ffd8a73-c30c-45a3-959a-43619ff8dd3a"
name "Message a model"
credentials
openAiApi
id "ayMsi7sUQnOVm40G"
name "OpenAi account"
10
parameters
jsCode "// 1. Get the raw image data (Base64) from the Webhook\nconst base64 = items[0].json.body.data.message.base64 || items[0].json.body.base64;\n\n// 2. Create the file package for OpenAI\nreturn [\n {\n json: { success: true },\n binary: {\n data: {\n data: base64,\n mimeType: 'image/jpeg',\n fileExtension: 'jpg',\n fileName: 'house.jpg'\n }\n }\n }\n];"
type "n8n-nodes-base.code"
typeVersion 2
position
0 -1808
1 448
id "659ce590-db35-4dba-8029-b4df2044159e"
name "Code in JavaScript"
11
parameters
jsCode `const data = $input.item.json;\n\n// 1. IMAGE RESULT (Check all possible output names)\n// It usually comes in 'response', 'output', or 'content'\nconst imageText = data.response || data.output || data.content || (data.message ? data.message.content : null);\n\n// 2. AUDIO RESULT (Transcription)\nconst audioText = data.text;\n\n// 3. WHATSAPP TEXT (Standard & Links)\n// We use ?. to safely dig into the nested structure without crashing\nconst waText = data.body?.data?.message?.conversation || data.body?.data?.message?.extendedTextMessage?.text;\n\n// OUTPUT: Create one single "chatInput" for the AI Agent\nreturn {\n chatInput: imageText || audioText || waText || "User sent a file without text"\n};`
type "n8n-nodes-base.code"
typeVersion 2
position
0 -1696
1 96
id "89962125-10e5-4101-80bd-c02141c502fa"
name "Code in JavaScript1"
12
parameters
descriptionType "manual"
toolDescription "Create an event in Google Calendar. \nUse this tool to schedule a meeting. You must provide a start time, end time, and a summary (name of the client)."
calendar
__rl true
value "[email protected]"
mode "list"
cachedResultName "[email protected]"
start "="
end "="
additionalFields
summary "="
type "n8n-nodes-base.googleCalendarTool"
typeVersion 1.3
position
0 -1152
1 384
id "47636df4-a806-4834-ae6f-7912ebfe37c1"
name "Create an event in Google Calendar"
credentials
googleCalendarOAuth2Api
id "gf1PReFlu0pAZftJ"
name "Google Calendar account"
13
parameters
conditions
options
caseSensitive true
leftValue ""
typeValidation "strict"
version 3
conditions
0
id "c0aefbd9-a206-476d-aa3a-07736751aded"
leftValue "={{ $json.body.data.key.fromMe }}"
rightValue true
operator
type "boolean"
operation "equals"
combinator "and"
options {}
type "n8n-nodes-base.if"
typeVersion 2.3
position
0 -2240
1 64
id "4e503726-c7fa-458d-a657-a77fa798614a"
name "If"
pinData {}
connections
Webhook
main
0
0
node "If"
type "main"
index 0
Switch
main
0
0
node "Code in JavaScript1"
type "main"
index 0
1
0
node "Code in JavaScript1"
type "main"
index 0
2
0
node "Download Audio"
type "main"
index 0
3
0
node "Code in JavaScript"
type "main"
index 0
Download Audio
main
0
0
node "Convert to File"
type "main"
index 0
Convert to File
main
0
0
node "Transcribe a recording"
type "main"
index 0
Transcribe a recording
main
0
0
node "Code in JavaScript1"
type "main"
index 0
OpenAI Chat Model
ai_languageModel
0
0
node "AI Agent"
type "ai_languageModel"
index 0
Simple Memory
ai_memory
0
0
node "AI Agent"
type "ai_memory"
index 0
AI Agent
main
0
0
node "HTTP Request"
type "main"
index 0
Message a model
main
0
0
node "Code in JavaScript1"
type "main"
index 0
Code in JavaScript
main
0
0
node "Message a model"
type "main"
index 0
Code in JavaScript1
main
0
0
node "AI Agent"
type "main"
index 0
Create an event in Google Calendar
ai_tool
0
0
node "AI Agent"
type "ai_tool"
index 0
If
main
0 []
1
0
node "Switch"
type "main"
index 0
active false
settings
executionOrder "v1"
availableInMCP false
versionId "e4e74e94-ca5a-45c2-82ab-7bfdf91de9ee"
meta
instanceId "7631c1cf1a7fa8301b8f630136749c6d300c03b970dc38b63e74eaa94cdb615c"
id "XQMa7llRd-IueFT54bW6N"
tags []
Share the output returned by the last node
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