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AISkills402: Test Review — Can This Test Ever Fail?
x402
AISkills402: Test Review — Can This Test Ever Fail? is a paid API for AI agents from api.aiskills402.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-14).
Analyzes a pasted test, check script, smoke test, mutation script, or CI step and determines whether it can actually fail when the guarded code is broken, exposing vacuous or incomplete tests.
Price / call$0.03
Success—
StatusUnknown
How this service works
Test Review: Can This Test Ever Fail? — Reviews a pasted test, check script, smoke test, mutation script or CI step and says whether it can fail when the thing it guards is broken, so a green result is worth something. It finds a completeness guard that counts its own hard-coded list instead of the directory, a one-star glob that never enters subfolders, a mutation script that restores with git checkout and wipes the uncommitted fix under test, a null test that an empty string passes, a status …
Output
Returns a SKILL.md file containing a structured expert review of the submitted test or script, including a verdict on whether the test can ever fail when the guarded system is broken, specific failure patterns detected (e.g. hardcoded counts, shallow globs, null-passing empty strings, self-destructing git restores), and an explanation of what makes each flaw dangerous. Also includes a SHA256 hash of the file, settlement receipt with transaction hash, and a redownload URL/token for future retrieval.
Example use cases
Validate CI smoke test reliability
“Here's the smoke test step in my GitHub Actions workflow — can you check if it's actually capable of failing when the service is broken, or whether it'll just always pass and give me false confidence?”
Catch vacuous completeness check
“I have a script that checks whether all expected files exist, but I'm worried it might be counting from a hardcoded list instead of the actual directory — can you review it and tell me if a green result actually means all the files are there?”
Audit mutation test for self-destruction bug
“My mutation testing script uses git checkout to restore files after each mutation — can you review it and tell me if that means it's wiping my uncommitted fix under test and making results meaningless?”
Technical details
Endpoint
GEThttps://api.aiskills402.com/v1/skills/test-guard-review/file?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need expert-level analysis of whether a specific test, CI step, smoke test, or mutation script is genuinely capable of catching the defect it claims to guard — especially when you suspect the test may always pass regardless of code state. Prefer this over generic linting or static analysis tools when the concern is test validity and false confidence rather than syntax errors or style issues. It is particularly valuable for catching subtle failure modes like vacuous completeness guards, shallow glob patterns, null-passing assertions, and mutation scripts that destroy the very fix they are testing.
Side effects
- Payment not settled — x402 payment required before content is returned
- Invalid or missing HTTP method — only GET and HEAD are accepted
- Network timeout if upstream skill processing is slow
- Script too large or malformed — may return error if input exceeds limits
- Empty or missing input body — returns error if no test content is provided
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"file": {
"name": "SKILL.md",
"content": "<the SKILL.md file>",
"encoding": "utf-8"
},
"name": "Test Review: Can This Test Ever Fail?",
"skill": "test-guard-review",
"sha256": "<sha256 of SKILL.md>",
"receipt": {
"tx": "0x<settlement transaction>",
"settled": true
},
"version": "1.0.0",
"redownload": {
"url": "<api>/v1/purchases/<token>",
"token": "<64 hex chars>"
}
}
}Tags
x402
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