JSON to CSV

Turn a JSON array of objects into CSV, with the delimiter you choose.

Pay by wallet (x402) json-to-csv

Example

Example answer

{
  "csv": "age,city,name\n30,Stockholm,Alice\n25,Oslo,Bob",
  "columns": [
    "age",
    "city",
    "name"
  ],
  "row_count": 2,
  "column_count": 3
}

Inputs

Field	Type	Required	What it is
`data`	array	Yes	Array of objects to convert
`delimiter`	string	No	Column delimiter (default: comma)

Output fields

How reliably each field appears in a successful answer.

Field	Type	Appears
`csv`	string	Always (present in every successful answer)
`columns`	array	Always (present in every successful answer)
`row_count`	integer	Always (present in every successful answer)
`column_count`	integer	Always (present in every successful answer)

How to call it

The same tool through each route. MCP clients reach it through Strale’s server at https://api.strale.io/mcp; the call below is what the agent sends.

# Needs an API key. max_price_cents caps what this call may cost.
curl -X POST https://api.strale.io/v1/do \
  -H "Authorization: Bearer $STRALE_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "capability_slug": "json-to-csv",
    "inputs": {
      "data": [
        {
          "age": 30,
          "city": "Stockholm",
          "name": "Alice"
        },
        {
          "age": 25,
          "city": "Oslo",
          "name": "Bob"
        }
      ]
    },
    "max_price_cents": 2
  }'

{
  "tool": "strale_execute",
  "arguments": {
    "slug": "json-to-csv",
    "inputs": {
      "data": [
        {
          "age": 30,
          "city": "Stockholm",
          "name": "Alice"
        },
        {
          "age": 25,
          "city": "Oslo",
          "name": "Bob"
        }
      ]
    },
    "max_price_cents": 2
  }
}

import { Strale } from "straleio";

const strale = new Strale({ apiKey: process.env.STRALE_API_KEY! });
const result = await strale.do({
  capability_slug: "json-to-csv",
  inputs: {
    "data": [
      {
        "age": 30,
        "city": "Stockholm",
        "name": "Alice"
      },
      {
        "age": 25,
        "city": "Oslo",
        "name": "Bob"
      }
    ]
  },
  max_price_cents: 2,
});

import os
from straleio import Strale, DoRequest

strale = Strale(api_key=os.environ["STRALE_API_KEY"])
result = strale.do(DoRequest(
    capability_slug="json-to-csv",
    inputs={
        "data": [
            {
                "age": 30,
                "city": "Stockholm",
                "name": "Alice",
            },
            {
                "age": 25,
                "city": "Oslo",
                "name": "Bob",
            },
        ],
    },
    max_price_cents=2,
))

# No account. The first request answers 402 with the price in USDC;
# an x402 client pays it from your wallet and repeats the request.
curl -i -X POST https://api.strale.io/x402/v2/json-to-csv \
  -H 'Content-Type: application/json' \
  -d '{
    "data": [
      {
        "age": 30,
        "city": "Stockholm",
        "name": "Alice"
      },
      {
        "age": 25,
        "city": "Oslo",
        "name": "Bob"
      }
    ]
  }'

Limitations

Nested objects can produce very wide CSV files
Best with flat or shallow JSON arrays — deeply nested objects are flattened with dot notation which may produce wide CSVs
What to do instead: Use flatten-json first with a controlled depth parameter to preview the flattened structure before converting