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3 contributions to Voice AI Academy
My Vapi agent answers BEFORE the webhook response arrives from N8N
Hi everyone, Iโ€™m facing a blocking issue with a tool call + webhook flow and I hope someone can point me in the right direction. The problem is: My Vapi agent answers BEFORE the webhook response arrives from N8N, even though the tool is correctly triggered. Here is the sequence: The tool (Check_Availability) is triggered normally. N8N receives the toolCallId and starts processing the workflow. Before N8N finishes and sends back the JSON response, the agent already replies on its own with something generic like โ€œThe time is availableโ€ or simply continues the conversation. When N8N finally returns the correct JSON, Vapi logs show "result": "Success" instead of the actual message I returned. Here is the JSON I send back from the webhook: { "results": [ { "toolCallId": "call_7IAFqr0iUuzRxhoom52Qdiq5b", "result": "The requested time at 9 AM is not available, but 10 AM or 11 AM on the same day are available." } ] } โ€ข Using โ€œRespond With: JSONโ€ โ€ข No newlines โ€ข toolCallId is correct โ€ข Webhook returns instantly when tested manually โ€ข But during real calls, Vapi replies before receiving the webhook result My question is: Why is the agent not waiting for the webhook response, and how can I force Vapi to wait for the tool result before answering? Any idea what might cause this? Thanks a lot to anyone who can help!
My Vapi agent answers BEFORE the webhook response arrives from N8N
0 likes โ€ข Dec '25
Hello Mohammad, I just had something similar with make.com and vapi, fortunately i was able to figure it out. Can you share the complete code and workflow? or rather we jump on a call?
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Hey everyone, Andrew here an AI Governance Strategist. Happy being here, looking to connect with those passionate at unusual AI use-cases๐ŸŒ
0 likes โ€ข Oct '25
Hello Andrew, Nice to meet you. Are you a citizen of UG (your names)?
Quick intro
Hello Everyone Iโ€™m Ivan Driwale - decided to niche down to conversational agents and voice ai. this is my first post and Iโ€™m happy to be part of this bunch
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Ivan Driwale
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@ivan-driwale-5676
Data scienctist | ML Engineer | Data Analyst | Business Analyst

Active 1d ago
Joined Oct 17, 2025