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Get Started Free →jeremylongshore/klingai-common-errors
Diagnose and fix common Kling AI API errors.
Passed 20 of 22 test cases with the skill, and 18 of 22 without it.
2 fixed18 passed either way2 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 2 test cases the skill fixed. Same model, same prompt, with and without the skill.
My API calls to Kling AI return an HTTP status of 200, but the payload's task status is marked as failed. Can you provide a reference guide detailing task-level error messages—such as mask dimension mismatches, low image quality, or generation timeouts—and their fixes, along with an ordered diagnostic checklist to troubleshoot failed video generations?
| Checked | Without skill | With skill |
|---|---|---|
| Specifies that source images for video generation must have a minimum resolution of 300x300 pixels. | Passed | Passed |
| Specifies that mask dimensions must match source image dimensions exactly. | Passed | Passed |
| Specifies that the duration parameter must be provided as a string ("5" or "10") rather than an integer. | Missed | Passed |
| States that image_tail, dynamic_masks, and camera_control are mutually exclusive features. | Missed | Passed |
The instructions your model reads when the skill loads.
Complete error reference for the Kling AI API. Covers HTTP status codes, task-level failures, JWT issues, and generation-specific problems with tested solutions.
| Code | Error | Cause | Solution |
|---|---|---|---|
400 | Bad Request | Invalid parameters, malformed JSON | Validate all required fields; check model_name is valid |
401 | Unauthorized | Invalid/expired JWT token | Regenerate JWT; verify AK/SK; check exp claim |
402 | Payment Required | Insufficient credits | Top up API resource pack or subscription |
403 | Forbidden | Content policy violation or API disabled | Review prompt against content policy; enable API access |
404 | Not Found | Invalid task_id or wrong endpoint | Verify task_id; check endpoint path spelling |
429 | Too Many Requests | Rate limit exceeded | Implement exponential backoff (see pattern below) |
500 | Internal Server Error | Kling platform issue | Retry after 30s; if persistent, check status page |
502 | Bad Gateway | Upstream service unavailable | Retry with backoff; typically transient |
503 | Service Unavailable | System maintenance | Wait and retry; check announcements |
When HTTP returns 200 but task_status is "failed":
task_status_msg | Cause | Solution |
|---|---|---|
| Content policy violation | Prompt contains restricted content | Remove violent, adult, or copyrighted references |
| Image quality too low | Source image is blurry or too small | Use image >= 300x300px, clear and sharp |
| Prompt too complex | Too many scene elements | Simplify to 1-2 subjects, clear action |
| Generation timeout | Internal processing exceeded limit | Retry; reduce duration from 10s to 5s |
| Invalid image format | Unsupported file type | Use JPG, PNG, or WebP |
| Mask dimension mismatch | Mask size differs from source | Ensure mask matches source image dimensions exactly |
401 on every request# WRONG — missing headers parameter
token = jwt.encode(payload, sk, algorithm="HS256")
test cases passed, vs 18 / 22 without
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