XLSX/CSV to Markdown + JSON Converter

x402

XLSX/CSV to Markdown + JSON Converter is a paid API for AI agents from x402.freeq.one, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).

Converts an XLSX spreadsheet or CSV file (via URL or base64) into a Markdown table and a JSON array of row objects in a single call, covering all sheets.

Price / call$0.005

Seller volume →—

Success—

StatusUnknown

How this service works

XLSX/CSV to Markdown + JSON: Convert an XLSX spreadsheet or CSV to Markdown table AND a JSON array of row objects in one call. Provide a direct URL or base64-encoded file bytes. All sheets are included; multi-sheet workbooks are flattened in sheet order. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/xlsx_to_markdown.

Output

Returns a JSON object containing a Markdown-formatted table representation of the spreadsheet data and a JSON array of row objects (one per row across all sheets), optionally truncated to a specified character limit for the Markdown portion.

Example use cases

Feed spreadsheet data into an LLM pipeline

“I have a product catalog at https://example.com/products.xlsx — can you convert it into a Markdown table and a JSON array so I can pass it straight to my AI agent for analysis?”

Extract CSV rows as structured JSON

“Turn this CSV file from https://example.com/sales_q4.csv into a JSON array of row objects so I can query the data programmatically.”

Summarize multi-sheet workbook for review

“I have a multi-sheet Excel workbook at https://example.com/financials.xlsx — convert all the sheets into a Markdown table, but cap the markdown at 50000 characters so it doesn't overflow my context window.”

Technical details

Endpoint

POSThttps://x402.freeq.one/tools/xlsx_to_markdown?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need both a human-readable Markdown table AND structured JSON rows from an XLSX or CSV file in a single API call, especially for multi-sheet workbooks or when preparing spreadsheet data for LLM ingestion. Prefer it over manual parsing when the file is accessible via URL or can be base64-encoded.

Side effects

Invalid or inaccessible URL returns an error with HTTP status
Base64 payload exceeds 28MB limit causes rejection
Malformed or corrupt XLSX/CSV file results in parse error
max_length truncation only affects markdown output, not JSON rows — agents may be surprised JSON is untruncated
Multi-sheet workbooks are flattened in sheet order which may cause column name collisions

Input

Schema · Request body

Field	Type	Description
url	string	Direct URL to the XLSX or CSV file
file_b64	string	Base64-encoded XLSX/CSV bytes (alternative to url)
max_length	integer	Truncate the markdown output to N characters (JSON rows unaffected)

Output

Schema · Response

{
  "type": "json",
  "example": {
    "result": {}
  }
}

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