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

# Reach the API

[Sign up for the Ground Dashboard](https://portal.groundtech.co/signup) to create an
organization and issue an API key. Self-serve production access supports up to two
Portfolio Wallets and \$100 in cumulative withdrawals.
[Contact Ground](https://www.groundtech.co/contact) for full production access.

| Environment | Base URL |
| - | - |
| Sandbox | `https://sandbox.groundtech.co` |
| Production | `https://production.groundtech.co` |

```bash theme={"theme":{"light":"github-light","dark":"github-dark"}}
export GROUND_API_KEY="<your-api-key>"

curl "https://sandbox.groundtech.co/v2/wallets" \
  -H "Authorization: Bearer $GROUND_API_KEY"
```

Build against sandbox, then swap the base URL. The endpoint structure is identical, but
sandbox uses explicit testnet chain keys such as `ethereum_sepolia` and may expose a
smaller yield-source catalog than production.

[API Conventions](https://docs.groundtech.co/docs/portfolio-wallets/api-conventions.md) covers authentication,
pagination, idempotency, rate limits, and error handling.


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