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StableDesign Reply to Comment
x402
StableDesign Reply to Comment is a paid API for AI agents from stabledesign.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Post a reply to a comment on a Canva design via the StableDesign API, paid per call with USDC micropayments.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call Canva design API via MPP micropayments. Create, list, export designs and upload assets.
Output
Returns a reply object confirming the comment reply was posted, including the reply ID, timestamp, parent comment ID, and reply body text within the design's comment thread.
Example use cases
Auto-reply to design review feedback
“Go through all open comments on my Canva design 'Q4 Campaign Banner' and reply to any that mention font changes with 'Thanks for the note — font has been updated to match brand guidelines!' using the StableDesign API.”
Acknowledge collaborator annotations automatically
“Someone left a comment on my StableDesign project asking if the logo placement is final — reply to that comment with 'Yes, the logo position is locked in and approved by the brand team.' and handle the micropayment automatically.”
Close out resolved design threads
“Reply to all comments marked as resolved on my shared StableDesign presentation with 'This has been addressed — feel free to reopen if you have further feedback!' so collaborators know their input was acted on.”
Technical details
Endpoint
POSThttps://stabledesign.vercel.app/api/comments/reply?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically reply to an existing comment on a Canva design managed through StableDesign, especially in agentic workflows where design review feedback must be acknowledged or responded to automatically with pay-per-call micropayment billing via x402.
Side effects
- Comment ID not found — returns 404 with error indicating invalid or missing comment
- Design not accessible — returns 403 if the authenticated user lacks permission to comment
- Invalid reply body — returns 400 if reply text is empty or malformed
- Payment failure — returns 402 if the x402 USDC micropayment is not fulfilled or insufficient
- Rate limit exceeded — returns 429 if too many calls made in a short window
- Canva backend unavailable — returns 502/503 if the underlying Canva API is down
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| message | string | |
| design_id | string | |
| thread_id | string |
Tags
x402
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Zero review prompt (fires after every successful call)
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