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

# SDK compatibility

> Pin the Praxa SDK package, OpenAPI fingerprint, Node.js runtime, ESM mode, and Gateway wire contract.

The current documented SDK line is <code>@praxa/sdk\@0.3.0</code>.

## Requirements

* Node.js 20 or newer
* ESM or a build system that can consume ESM packages
* HTTPS Gateway origin for mission calls
* Short-lived delegated OAuth token with the exact operation scopes

## Startup assertion

```typescript theme={null}
import {
  PRAXA_CONTRACT_VERSION,
  PRAXA_OPENAPI_VERSION,
  PRAXA_OPENAPI_SHA256,
} from "@praxa/sdk";

if (PRAXA_CONTRACT_VERSION !== "aura-integration-gateway-v8.1") {
  throw new Error("Unsupported Praxa Gateway contract");
}

console.log({
  openapi: PRAXA_OPENAPI_VERSION,
  sha256: PRAXA_OPENAPI_SHA256,
});
```

Praxa-named exports do not rename the stable Aura-compatible wire contract.
See the shared [Version compatibility](/releases/compatibility) and
[Migration guide](/releases/migration-guide) before changing a pinned package.