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ZIP Entry Header Inspector
x402
ZIP Entry Header Inspector is a paid API for AI agents from file-formats.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).
Parses the first entry header of a ZIP file from hex bytes, extracting name, compression method, sizes, CRC32, encryption status, and detecting zip-slip path or executable-name risks.
Price / call$0.02
Success—
StatusUnknown
How this service works
Parse a ZIP's first entry header: name, method, sizes, CRC, encryption, and zip-slip path or executable-name risks.
Output
Returns a structured object including the entry's file name, compression method name and code, compressed and uncompressed sizes, CRC32 checksum, encryption status, general-purpose bit flags, last-modified timestamp, UTF-8 name flag, data descriptor flag, version needed, name and extra field lengths, whether the name is complete, any detected path risks (zip-slip traversal), executable-name risks, an overall verdict and summary, and a list of any checks that could not be performed given the bytes provided.
Example use cases
Security scan before ZIP extraction
“I'm about to unzip a file a user uploaded to our server. Can you check the first entry's header bytes — here's the hex: 504b03040a00000008006f5b4e52b1f9f82032000000280000000c0000007465737466696c652e74787474657374 — and tell me if there are any zip-slip path traversal risks or suspicious executable names I should worry about?”
Verify ZIP compression method for compatibility
“I need to know which compression method the first file in this ZIP uses — is it stored (0), deflated (8), or something else? Here's the raw header in hex: 504b03040a0000000000a2a34e5200000000000000000000000009000000746573742e747874”
Check if uploaded ZIP entry is encrypted
“Someone submitted a ZIP archive and I want to know if the first entry inside is password-protected before I try to process it. Here's the first 300 bytes in hex: 504b0304140001080800 — is it encrypted and what's the file name?”
Technical details
Endpoint
GEThttps://file-formats.x402tookit.com/zip-entry?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to quickly inspect the first entry of a ZIP archive for security risks (zip-slip, hidden executables, encryption) or metadata (compression method, sizes, CRC32) without fully downloading or extracting the archive. It is ideal for pre-flight security screening of user-uploaded ZIPs, for validating ZIP structure before processing, or for forensic analysis of suspicious archives. Prefer this over generic file-type detectors when you specifically need ZIP entry-level metadata and risk assessment.
Side effects
- Insufficient hex bytes provided — header fields can't be fully parsed if fewer than the local file header length + name length are supplied
- Invalid or non-hex input causes a parsing error
- Hex string doesn't begin with ZIP local file header signature (PK\x03\x04), resulting in an error or degraded result
- Truncated name field — if hex is too short to include full file name, nameComplete will be false and some risk checks may be skipped
- Non-ZIP file bytes submitted — service may return error or degraded flag
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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