> ## Documentation Index
> Fetch the complete documentation index at: https://docs.serialized.trade/llms.txt
> Use this file to discover all available pages before exploring further.

# Errors

> Machine-readable error contract

Every error is:

```json theme={null}
{
  "error": {
    "code": "INVALID_PARAM",
    "message": "Human-readable detail",
    "details": "optional"
  }
}
```

| Code               | HTTP |
| ------------------ | ---- |
| `INVALID_CHAIN`    | 400  |
| `INVALID_PARAM`    | 400  |
| `UNAUTHORIZED`     | 401  |
| `NOT_FOUND`        | 404  |
| `RATE_LIMITED`     | 429  |
| `UPSTREAM_ERROR`   | 502  |
| `UPSTREAM_TIMEOUT` | 504  |
| `INTERNAL`         | 500  |