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grist.tools CSV to JSON Converter
x402
grist.tools CSV to JSON Converter is a paid API for AI agents from grist.tools, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).
Converts a CSV or TSV file (fetched from a URL) into a JSON array of objects or arrays, with configurable headers, delimiters, and row limits.
Price / call$0.005
Success—
StatusUnknown
How this service works
One endpoint does one thing, always the same way, for a fraction of a cent. Payment is verified before the handler runs and settled only after it succeeds, so a rejected or failed call is never a charged call.
Output
A JSON object containing a 'rows' array (of objects when header=true, or arrays of strings when header=false), a 'truncated' boolean indicating whether the result was capped by max_rows, and detected or specified delimiter metadata. Each object uses trimmed header names as keys, with blank or duplicate names normalized automatically.
Example use cases
Ingest analytics export for pipeline
“I just exported our analytics report as a CSV at https://analytics.example.com/export.csv — can you convert it to JSON with the first row as headers so I can feed it into our data pipeline? Cap it at 1000 rows.”
Preview pipe-delimited vendor feed
“I have a pipe-delimited vendor product feed at https://vendor.example.com/products.txt — convert just the first 50 rows to JSON using | as the delimiter with the first row as headers so I can check the structure.”
Parse headerless sensor log
“Convert the raw sensor log at https://iot.example.com/readings.csv to JSON without using the first row as headers — I want each row returned as a plain array of strings.”
Technical details
Endpoint
POSThttps://grist.tools/v1/csv-to-json?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a simple, pay-per-call CSV/TSV-to-JSON conversion from a publicly accessible URL, without standing up your own parser or managing file uploads. It is ideal for one-off or infrequent conversions where a $0.005 per-call model is economical, and when strict UTF-8 enforcement and automatic delimiter detection are desirable. Prefer alternatives if you need to process private files requiring authentication, handle non-UTF-8 encodings, or convert very large files exceeding the row budget frequently.
Side effects
- 415 Unsupported Media Type — unsupported or invalid charset declaration or NUL bytes in the file
- 422 Unprocessable Entity — malformed UTF-8 encoding in the CSV body
- 422 csv_extra_fields — a data row has more fields than the header when header=true
- Payment rejected or timed out — call is not charged if payment verification fails
- URL unreachable or returns non-200 — fetch of the remote CSV URL fails
- Empty or whitespace-only file — no rows returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| urlrequired | string | UTF-8 CSV/TSV URL. Missing charset means UTF-8; only utf-8 and utf8 declarations are accepted (case-insensitive, optionally quoted). Unsupported or invalid declarations and NUL bytes return 415; malformed UTF-8 returns 422. A UTF-8 BOM is accepted. Encoding is checked across the whole body. |
| header | boolean | Use the first nonempty record as object keys. Names are trimmed; blank names become column_<position>. Names are made unique left to right using the next unused _2, _3 suffix, including collisions with literal suffixed names. Special names remain data keys. Short rows pad with empty strings; extra fields return 422 csv_extra_fields. With false, preserve actual row widths as string arrays. |
| max_rows | integer | Maximum returned nonempty data rows. One additional nonempty record sets truncated; its width is budgeted but not checked against the header. A truncated success does not validate the entire CSV structure. |
| delimiter | string | A single field delimiter character such as "," or a tab; omitted, it is auto-detected from the first rows among comma, tab, pipe, semicolon and the ASCII record and unit separators, and a line break, quote or BOM given here falls back to a comma. |
Tags
x402
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