APIs › Document & File Utilities › MIME Type Validation

MIME Type Validation

Checks whether a file's declared MIME type matches its actual content signature and flags mismatches.

POST /v1/files/mime-validate $0.003 per call

Specification

Endpoint

POST /v1/files/mime-validate

Price

$0.003 per call · tier micro_data

Payment

x402 on X Layer (chain 196) · settled in USDG or USDT0 · schemes exact, aggr_deferred

Data source

Local sandboxed processing of the uploaded file

Timeout

120 seconds

Max request

20 MB

Version

1.0.0

Calling it

The first call returns a 402 with the payment challenge. Retry with a signed authorisation in the X-PAYMENT header — see the payment guide for the exact shape.

curl -i -X POST "https://api.dana-edu.pp.ua/v1/files/mime-validate" \
  -H "content-type: application/json" \
  -d '{ ... }'

Response

Real output, captured by running this endpoint at build time — not written by hand. Volatile fields such as timestamps are elided. Captured 2026-07-30.

{
  "filename": "<varies per call>",
  "valid": true,
  "expected_mime": "application/pdf",
  "detected_mime": "application/pdf",
  "detected_label": "PDF document",
  "is_executable": false,
  "file_extension": "pdf",
  "extension_consistent": true,
  "size_bytes": 1764
}

Every response is wrapped in the same envelope: data plus warnings, sources, confidence, informational_only and a measured processing_ms. See the envelope reference.

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