Discover / file-formats.x402tookit.com

File Format Inspector

■ Challenge detected

Compare a file name's extension with its real type from the first bytes; flags executables disguised as documents or images.

Listed price
$0.02
Challenge detected
1 of the last check
Median response
311 ms
Last checked
21 Oct, 00:26 UTC
In our index since
21 Oct 2026

Endpoint

curl -i https://file-formats.x402tookit.com/extension-vs-content
# 402 Payment Required: pay with an x402 client (USDC on Arbitrum),
# then send the same request again with the payment attached.
9 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://file-formats.x402tookit.com

  • GET/jpeg-infoNo price listedRead a JPEG's width, height, components and baseline/progressive mode by walking its markers; flags JFIF and Exif.
  • GET/gif-headerNo price listedRead a GIF's version, width, height and global colour table size from its first 13 bytes.
  • GET/zip-entryNo price listedParse a ZIP's first entry header: name, method, sizes, CRC, encryption, and zip-slip path or executable-name risks.
  • GET/png-headerNo price listedRead a PNG's width, height, bit depth, colour type and interlace from its first 33 bytes, and verify the IHDR CRC.
  • GET/gzip-headerNo price listedParse a gzip header: method, flags, modification time, original file name, OS and compression hint.
  • GET/pdf-headerNo price listedRead a PDF's version and header position from its first bytes; flags junk before %PDF- and an invalid version.
  • GET/extension-vs-contentNo price listedCompare a file name's extension with its real type from the first bytes; flags executables disguised as documents or images.
  • GET/magic-bytesNo price listedIdentify a file type from the first bytes (hex): PNG, JPEG, PDF, ZIP, ELF, EXE, MP4, SQLite and 40+ more signatures.
  • GET/webp-infoNo price listedRead a WebP's width, height, lossy/lossless/extended format, alpha and animation flags from its first 30 bytes.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 9 of 9 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/file-formats.x402tookit.com

Recent checks

21 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.21 Oct 2026
All 1 checks
When (UTC)ResultHTTPResponse
21 Oct, 00:26 UTCChallenge detected402311ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 21 Oct, 00:26 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for File Format Inspector?

Its listed price is $0.02.

What payment terms does File Format Inspector advertise?

The listing advertises x402, Arbitrum, Base, Polygon, Solana and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is File Format Inspector listed?

In x402 Bazaar. Superstables first indexed it on 21 Oct 2026.

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