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JSON Flatten
x402
JSON Flatten is a paid API for AI agents from x402.agentindex.world, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).
Flattens a nested JSON object into a single-level dictionary with dot-separated (or custom separator) keys
Price / call$0.001
Success—
StatusUnknown
How this service works
Flatten a nested JSON document into single-level dotted-path keys.
Output
Returns a flattened object where all nested keys are collapsed into a single level, with each key being the full path from root to leaf joined by the specified separator (default '.'), and array indices represented numerically. Example: {"a": {"c": [2,3]}} becomes {"a.c.0": 2, "a.c.1": 3}.
Example use cases
Normalize API response for CSV export
“I got this deeply nested JSON back from an API — can you flatten it into a single-level key-value structure using dot notation so I can drop it into a spreadsheet? Here's the JSON: {"user": {"name": "Alice", "address": {"city": "NYC", "zip": "10001"}}}”
Flatten config file for environment variables
“Take this nested config object and flatten it for me using underscores as the separator so I can use it as environment variable names: {"db": {"host": "localhost", "port": 5432}, "app": {"debug": true}}”
Prepare nested data for flat key-value store
“I need to store this nested JSON in a flat key-value store. Can you flatten it using dot notation? {"metrics": {"cpu": {"usage": 0.85, "cores": 8}, "memory": {"used": 4096, "total": 16384}}}”
Technical details
Endpoint
GEThttps://x402.agentindex.world/json/flatten?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pay-per-call utility to flatten nested JSON without setting up any local libraries or infrastructure. Ideal for agents that occasionally need to normalize JSON as part of a larger workflow, especially when already operating in the x402/USDC micropayment ecosystem on Base. Good for one-off transformations where installing a flattening library is overkill.
Side effects
- Missing or non-object 'data' parameter may return an error or empty result
- Circular references in the input JSON may cause infinite loops or errors
- Very deeply nested structures may hit processing limits
- Invalid JSON input that cannot be parsed will return an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | — | |
| separator | string |
Output
Schema · Response
{
"type": "json",
"example": {
"flattened": {
"a.b": 1,
"a.c.0": 2,
"a.c.1": 3
}
}
}Tags
x402
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