Twilio · api · fg-0083
People who text your Twilio number get a reply that says 'Accepted'
Sender gets a reply containing Accepted or another raw response body
Verified 2026-10-14 · Confirmed by 0 builders · Trust 50/100
Cause
Twilio treats the incoming-message webhook's response as TwiML. A webhook that answers with plain text, such as a workflow tool's default Accepted, sends that text back to the sender.
Fix
Respond to the webhook at once with an empty TwiML document and do the processing after that.
Apply
HTTP 200, Content-Type: text/xml, body: <?xml version="1.0" encoding="UTF-8"?><Response></Response>
Affects: Twilio Programmable Messaging webhooks, October 2026
Have your agent know this before it fails
claude mcp add --transport http footgun https://getfootgun.com/api/mcp