Skip to content
HTML/CSS to ImageDocs

Report a bug, request a feature, or suggest an improvement to the HCTI team through the API or your MCP assistant.

For bug reports, describe what you tried, what you expected, and what happened. Include steps to reproduce the issue and any related request, image, or template IDs.

POSThttps://hcti.io/v1/feedback

Send a JSON body with Content-Type: application/json. You can submit anonymously or use HTTP Basic authentication to link feedback to your organization. Any valid API key can submit feedback.

Name Type Required Description
message String Yes Describe your feedback in at least 20 characters, excluding surrounding whitespace. Maximum 10,000 characters, including whitespace.
subject String No Short summary, up to 255 characters. Surrounding whitespace is trimmed; blank subjects are ignored.
callback_url String No Public HTTP or HTTPS URL where HCTI can send a response. Maximum 2,048 characters.

A callback URL must include its scheme and host, resolve only to public IP addresses, and contain no embedded credentials or URL fragment. Omit callback_url when you do not need a response. Callback responses have no guaranteed delivery or response time.

Remove credentials from your report and get approval before sharing someone else’s private content, including customer HTML.

Submit a bug report:

Terminal window
curl --request POST 'https://hcti.io/v1/feedback' \
--header 'Content-Type: application/json' \
--data '{
"subject": "PDF content is clipped",
"message": "The bottom of page 2 is clipped when I render my HTML as PDF. I expected the full page to appear. To reproduce, render the same HTML with format set to pdf, then png. The PNG includes all the content."
}'

To link the report to your organization, add --user "$HCTI_API_ID:$HCTI_API_KEY" with your API credentials set in those environment variables.

200 OK returns a confirmation and the feedback ID:

{
"message": "Feedback received. Thank you!",
"id": "<feedback-id>"
}

Use the returned id to reference your feedback.

Invalid input returns 400 Bad Request with the message Invalid feedback. Check validationErrors for the fields to fix. Invalid API credentials return 401 Unauthorized.

The feedback:write rate limit allows 2 submissions per minute:

  • Your organization shares this limit across all API keys and MCP connections.
  • Anonymous API submissions share a limit per IP address.

If the API returns 429 Too Many Requests, wait the number of seconds in Retry-After, or 60 seconds if the header is absent. See rate limits.

Ask your connected assistant to send feedback to HCTI. The submit_feedback tool is available to every authenticated MCP connection.

The tool accepts message, subject, and callback_url as arguments:

{
"subject": "PDF content is clipped",
"message": "The bottom of page 2 is clipped when I render my HTML as PDF. I expected the full page to appear. To reproduce, render the same HTML with format set to pdf, then png. The PNG includes all the content."
}

Successful submissions return:

{
"item": {
"message": "Feedback received. Thank you!",
"id": "<feedback-id>"
},
"success": true
}

Use success to check the result and item.id to reference your feedback. If the tool reports a rate-limit error, wait 60 seconds before retrying.

Assistants should get your approval before sending feedback on their own and share the confirmation and feedback ID after submitting.

Need help?

Talk to a human. Email support@htmlcsstoimage.com and we’ll help you get started.