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

> ## Agent Instructions
> When building application code, use `@naturalpay/sdk` for TypeScript or `naturalpay` for Python.
> When operating Natural directly for a user, use the payments MCP at `https://mcp.natural.com`.
> When searching Natural documentation, use the docs MCP at `https://docs.natural.com/mcp`.
> Use the Natural CLI for terminal and CI automation.
> Use REST only for unsupported languages or when the user explicitly requests raw HTTP.
> Start integration development and testing in the sandbox. Do not use production unless the user explicitly requests it.
> For sandbox requests that require `customerPartyId`, list customers first. Reuse only the intended fixture; otherwise create a customer.
> REST and SDK amounts use integer minor units. Payments MCP amounts use decimal strings with a required currency code.

# Sandbox beta

> Test your integration without moving real money

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<p className="changelog-rail" data-date="2026-08-25" data-path="/changelog/sandbox-beta">
  August 25, 2026
</p>

<img src="https://mintcdn.com/natural-b3c9dd77/46nigEZB8sVMtjts/assets/heroes/changelog-sandbox-hero.jpg?fit=max&auto=format&n=46nigEZB8sVMtjts&q=85&s=92eb71f9dfea782d7ace43a1b6a54b42" alt="The Natural dashboard in sandbox mode" width="2400" height="1280" className="hero-image" noZoom data-path="assets/heroes/changelog-sandbox-hero.jpg" />

The Natural sandbox is now in beta and available to all users. It's a complete Natural environment that works like production, so you can build and test your integration end to end without moving real money.

* **No separate onboarding.** Flip the Sandbox toggle in the dashboard to get sandbox keys, and your organization carries over automatically.
* **Money moves instantly.** Transfers and payments settle as soon as you make them.
* **Simulate the other side of every flow.** Accepting a [pending invitation](/api-reference/simulations/accept-customer-invitation) verifies the test customer. Simulation endpoints also let you decline an invitation, fulfill or decline a payment request, complete a payment claim held for an off-platform recipient, and link a test bank account.
* **[Fixtures](/api-reference/sandbox/fixtures) included.** Every sandbox organization gets a set of synthetic counterparties with reserved identifiers, so you always have someone to pay and request.
* **Works everywhere Natural does.** The full sandbox is available from the API, MCP, the SDKs, and the CLI. Keys carry their environment in the prefix and never work anywhere else.

Get started in the [sandbox overview](/api-reference/sandbox/overview).

<div className="changelog-pager">
  <a className="changelog-pager__link changelog-pager__link--prev" href="/changelog/webhook-replay">
    <span className="changelog-pager__title">Webhook event replay</span>
  </a>
</div>