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JSON to TypeScript Interface Converter
x402
JSON to TypeScript Interface Converter is a paid API for AI agents from api.strale.io, paid per call via x402, $0.054001/call, status unknown (last checked 2026-10-13).
Converts a JSON object or string into TypeScript interfaces, handling nested objects, arrays, optional fields, date strings, and UUIDs.
Price / call$0.054001
Success—
StatusUnknown
How this service works
Convert JSON to TypeScript interfaces. Handles nested objects, arrays, optional fields. Detects date strings and UUIDs. Algorithmic.
Output
Returns TypeScript interface declarations for the provided JSON, with nested object types, arrays typed appropriately, optional fields marked with '?', date strings inferred as Date types, and UUIDs noted. If 'export' is requested, interfaces are prefixed with the export keyword. The root interface uses the supplied root_name or a default name.
Example use cases
Example prompt
“Can you convert this JSON into TypeScript interfaces for me: {"user":{"id":"550e8400-e29b-41d4-a716-446655440000","name":"Alice","createdAt":"2024-01-15T10:00:00Z","address":{"city":"Berlin","zip":"10115"}}} — name the root interface 'User' and include export keywords.”
Technical details
Endpoint
GEThttps://api.strale.io/x402/json-to-typescript?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, algorithmic TypeScript interface generation from a JSON payload without sending data to an LLM. It is ideal for typed API client generation, auto-documenting REST response shapes, or scaffolding TypeScript models from sample data. Prefer it over LLM-based approaches when consistency, speed, and determinism matter.
Side effects
- Invalid or malformed JSON input returns an error
- Missing required 'json' query parameter returns a 400-level error
- Extremely deeply nested or circular JSON structures may produce incomplete output
- Non-JSON string passed as input fails to parse
Input
{
"json": "{\"user\":{\"id\":\"550e8400-e29b-41d4-a716-446655440000\",\"name\":\"Alice\",\"createdAt\":\"2024-01-15T10:00:00Z\",\"address\":{\"city\":\"Berlin\",\"zip\":\"10115\"}}}",
"export": true,
"root_name": "User"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"_meta": {
"payment": {
"method": "x402",
"price_usd": 0.054000000000000006,
"settlement_id": "0x22d86d6bc7fa3cd4144e78e10aca0a3a4c8b6580640bd19398f5218c62b14d37"
},
"capability": "json-to-typescript",
"latency_ms": 0,
"provenance": {
"source": "algorithmic",
"fetched_at": "2026-06-16T01:24:45.622Z"
}
},
"root_type": "User",
"typescript": "export interface User {\n user: UserUser;\n}\n\nexport interface UserUser {\n id: string;\n name: string;\n createdAt: string /* ISO date */;\n address: UserUserAddress;\n}\n\nexport interface UserUserAddress {\n city: string;\n zip: string;\n}",
"interface_count": 3
}Tags
x402
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