# Cleard developer documentation

> Fictional data. No live funds. The sandbox walkthrough is public; its saved workspace requires sign-in. Authenticated simulation API: https://sandbox.cleard.ai/index.json. No scoped agent credentials or BLISK execution.

## Read first
- [Capabilities](/portal/capabilities.json): supported operations and explicit limits
- [Full documentation](/portal/docs.md): all pages in Markdown
- [OpenAPI](/portal/openapi.json): implemented read-only endpoints

## Guides
- [Introduction](/portal/introduction.md): Explore pre-agreed refund rights for open payments. Understand the model, inspect a purchase, and follow a refund from decision to collection.
- [Quickstart](/portal/quickstart.md): Understand the public example without an account, then sign in to save your own sandbox experiments.
- [Sandbox](/portal/sandbox.md): One sandbox: follow a public example, then sign in to save your own experiments.
- [How Cleard works](/portal/concepts.md): Keep the agreement, the decision, and the movement of money distinct.
- [Purchase commitment](/portal/purchase.md): The record that connects an exact purchase to its terms and refund path.
- [Claims and decisions](/portal/claims.md): A claim asks for a remedy. Only the decision authority named in the accepted policy can approve it.
- [Funding and execution](/portal/funding.md): Authority defines what may be collected. Eligible funds determine what can actually be paid.
- [API reference](/portal/api.md): Available read-only resources for documentation, capability discovery and example data.
- [For AI agents](/portal/agents.md): A compact starting point, plain-text documentation and explicit capability boundaries.
- [Glossary](/portal/glossary.md): The commercial and technical terms used throughout this portal.

## Data
- [Example purchase](/portal/examples/purchase.json): unsigned fixture
- [Purchase schema](/portal/schemas/purchase.json): structure, not proof of authenticity