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HTTP status: 400 · Title: “Validation failed”

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When it fires

The request body failed Zod schema parse. One or more fields are missing, malformed, or out of range.

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Why it happens

  • Required field is missing or null.
  • Field has the wrong type (e.g., amount sent as a number instead of a string — we use string for arbitrary-precision USDC amounts).
  • Field violates a constraint (UUID format, enum value, min/max length).
  • An unknown extra field was sent — we accept extras (.passthrough()) so this is rarely the cause; if it is, you’ll see it called out in detail.

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How to fix

  • The detail field carries the path of the first offending field (e.g., body.outcomeIndex must be a non-negative integer).
  • Cross-reference with the OpenAPI spec at https://api.kash.bot/v1/openapi.json — every endpoint’s request body is fully typed there.
  • If you’re using the TS SDK, you’d have caught this client-side via KashValidationError before the request went out.

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Example

{
  "type": "https://docs.kash.bot/developer-docs/api-errors/VALIDATION_FAILED",
  "title": "Validation failed",
  "status": 400,
  "code": "VALIDATION_FAILED",
  "detail": "body.amount must be a string matching ^[0-9]+(\\.[0-9]+)?$",
  "instance": "/v1/trades",
  "requestId": "01HX-..."
}