APIs › Document & File Utilities › CSV to XLSX

CSV to XLSX

Converts CSV to a formatted XLSX workbook with typed columns, a frozen header row and auto-fitted widths.

POST /v1/convert/csv-to-xlsx $0.02 per call

Specification

Endpoint

POST /v1/convert/csv-to-xlsx

Price

$0.02 per call · tier advanced_analysis

Payment

x402 on X Layer (chain 196) · settled in USDG or USDT0 · scheme exact

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/convert/csv-to-xlsx" \
  -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.

{
  "sheet_name": "Data",
  "row_count": 5,
  "column_count": 1,
  "detected_encoding": "ascii",
  "detected_delimiter": ",",
  "detected_types": {
    "A": "text"
  },
  "header_frozen": true,
  "reproducible": "document properties are pinned, so identical input produces byte-identical output",
  "output_size_bytes": 5086,
  "output_filename": "<varies per call>",
  "output_base64": "<base64 payload elided from the published example>"
}

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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