Call ID: 019e272f-24c5-7000-bec1-7a493bdbdc93 Timestamp: Thu, 14 May 2026 10:50 AM central Expected result: outbound call would be placed and connected to the Assistant Actuall Result: Ended: Call.in progress.error providerfault outbound sip 503 service unavailable

Hi Jacob, Root Cause (one sentence) The

endCallPhrases

list contains

"thanks for calling"

, which is also present verbatim in the assistant's

firstMessage

, causing Vapi to detect the phrase from the assistant's own greeting and immediately end the call. ---- Fix Remove

"thanks for calling"

and

"thank you for calling"

from

endCallPhrases

— these are common business greeting phrases that will always conflict with inbound call openers. Use only unambiguous farewell phrases:

"endCallPhrases": ["goodbye", "take care", "have a good day"]

Alternatively, rewrite the

firstMessage

to avoid the conflicting phrase:

"Hi there! You've reached SharpTop Tree Service. How can I help you today?"

---- Query to verify (reproduce)

SELECT id, ended_reason, started_at, ended_at
FROM call
WHERE id = '019e1d8e-ab6d-7000-b424-558bcc8b42d8'
AND created_at >= now() - INTERVAL 7 DAY

Thank you for the info however when i look at the advanced secction of my assistant i don't see any end call phrases configured. I have manually added the end call phrases you have sugested and no impact was made on the error. also i don't have "thanks for calling" or "thank you for calling" in my first message. https://cdn.discordapp.com/attachments/1504518783018995713/1504537336740843602/image.png?ex=6a075916&is=6a060796&hm=356675390dc7911e4edb719495b2182b121f9fe5ad80cbbff28bb09f2af4dd1c&