PennyRail JSON Object Flattener

x402

PennyRail JSON Object Flattener is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Flattens a nested JSON object into a single-level key-value structure using dot-notation keys

Price / call$0.001

Seller volume →—

Success—

StatusUnknown

How this service works

Machine-readable settlement service

Output

A flat JSON object where all nested keys have been collapsed into top-level dot-notation string keys (e.g. 'user.address.city') mapped to their corresponding primitive values, with no remaining nested objects.

Example use cases

Flatten config before environment injection

“I have a deeply nested app config object like {"db":{"host":"localhost","port":5432},"cache":{"ttl":300}} — can you flatten it into dot-notation keys so I can inject each one as an environment variable?”

Normalize API response for spreadsheet export

“I got this nested JSON back from an API — {"order":{"id":"123","customer":{"name":"Bob","email":"bob@example.com"},"total":49.99}} — can you flatten it into a single-level object so I can map each field to a spreadsheet column?”

Prepare nested form data for database row

“Before I insert this user profile object into my flat database table, can you flatten it? It looks like {"profile":{"firstName":"Jane","preferences":{"theme":"dark","language":"en"}},"createdAt":"2024-01-01"}.”

Technical details

Endpoint

POSThttps://pennyrail.vercel.app/api/p/nano/json.flatten--flatten-object

When to prefer

Choose this endpoint when you need a quick, pay-per-call flattening of a single nested JSON object without managing your own transformation logic. It is ideal for lightweight agent workflows that occasionally need to normalize JSON structure before storage, export, or environment injection, and where spinning up a local utility function is impractical. Prefer alternatives if you need recursive array unrolling, custom delimiter support, or batch processing of many objects at once.

Side effects

Missing or empty 'input' field returns a validation error
Non-object value for 'input' (e.g. array or string) may return an error or unexpected output
Payment failure via x402 protocol results in 402 status and no transformation
Circular references in input object may cause processing errors
Extremely large or deeply nested objects may time out or exceed payload limits

Input

Schema · Request body

Field	Type	Description
inputrequired	object

Output

Schema · Response

{
  "type": "object",
  "additionalProperties": true
}

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Example use cases

Flatten config before environment injection

Normalize API response for spreadsheet export

Prepare nested form data for database row

Technical details

Endpoint

POSThttps://pennyrail.vercel.app/api/p/nano/json.flatten--flatten-object

When to prefer

Side effects

Missing or empty 'input' field returns a validation error
Non-object value for 'input' (e.g. array or string) may return an error or unexpected output
Payment failure via x402 protocol results in 402 status and no transformation
Circular references in input object may cause processing errors
Extremely large or deeply nested objects may time out or exceed payload limits

Input

Schema · Request body

Field	Type	Description
inputrequired	object

Output

Schema · Response

{
  "type": "object",
  "additionalProperties": true
}