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

# Slate API

> Trading infrastructure API for brokers running on Slate.

The Slate API gives brokers programmatic access to every platform feature —
orders, accounts, instruments, transactions, real-time market data, and
complete broker back-office operations.

## Base URL

```
https://api.{your-broker-domain}
```

Every broker runs on their own subdomain. Replace `{your-broker-domain}` with
the domain issued during onboarding.

## Authentication

All authenticated requests require a Bearer token in the `Authorization` header:

```
Authorization: Bearer <access_token>
```

Tokens are obtained via the login endpoints documented under
[Authentication](/authentication).

## Rate Limits

| Bucket                  | Limit                        |
| ----------------------- | ---------------------------- |
| Authenticated endpoints | 300 requests / minute / user |
| Registration endpoint   | 600 requests / minute / IP   |

Responses include standard `X-RateLimit-*` headers when a limit applies.

## Errors

The API uses conventional HTTP status codes. Error responses are JSON:

```json theme={null}
{
  "detail": "Human-readable message",
  "error": "machine_readable_code"
}
```

| Code  | Meaning                                                 |
| ----- | ------------------------------------------------------- |
| `400` | Validation failed — see `detail`                        |
| `401` | Missing or invalid credentials                          |
| `403` | Credentials valid but insufficient scope                |
| `404` | Resource not found                                      |
| `409` | Conflict — typically a duplicate or state mismatch      |
| `429` | Rate limit exceeded                                     |
| `5xx` | Platform error — safe to retry with exponential backoff |

## Versioning

The API is versioned through its hostname. Breaking changes ship on a new
subdomain; non-breaking additions roll out in place and are announced in the
changelog.

## Next

* [Authentication](/authentication) — obtain and refresh access tokens
* [API Reference](/api-reference) — the full endpoint catalog