Decode Playground

The Decode Playground runs Atlas decoding in your browser. No API key and no sign-in.

What it is for

• Developers validating RPC event JSON or XDR before wiring production code
• Explorer users checking why an event is decoded or raw

What it is not

• Deploying or invoking Soroban contracts (use Stellar Lab or your CLI)
• Uploading WASM or publishing schemas (use the Schema Registry and CLI)

How to use

1. Open /playground (full-screen editor, testnet only for now).
2. Select the emitting contract ID from the registry list.
3. Paste payload as JSON (topicsJson / valueJson) or XDR (topics_xdr / value_xdr).
4. Click Decode (or ⌘/Ctrl+Enter).

The Naralabs web app calls Atlas on your behalf; you never paste an nl_api_ key into the playground.

From the explorer

On an event detail page, use Try in Playground to prefill contract ID and payload (XDR when available).

Related

• Decode API: programmatic decode with your own API key
• Decoding & schemas