> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.clossir.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.clossir.com/_mcp/server.

# Getting Started

GETTING STARTED

Clossir is omni-chain infrastructure for issuing and administering tokenized real-world assets.
This section gets you from zero to your first API call in under five minutes, then builds the
mental model you need to go deeper.

## Where to start

#### [Quickstart](/getting-started/quickstart)

Install the SDK, authenticate, and make your first call in under 5 minutes.

#### [Concepts](/getting-started/concepts)

Orgs, attestations, policies, assets, and webhooks — the building blocks.

#### [Authentication](/getting-started/authentication)

Org-scoped API keys, permission scopes, and error handling.

#### [Guides](/guides/onboard-org)

Step-by-step guides: onboard an org, attest users, define policies, deploy assets, and set up webhooks.

## How the API works

Every Clossir API call follows two patterns:

* **Commands** (`POST → 202 Accepted`) — accepted and processed asynchronously. Poll the
  corresponding `GET` endpoint for the resulting state.
* **Reads** (`GET → 200 OK`) — synchronous queries against the current state.

All requests authenticate with an **org-scoped API key** passed in the `Authorization` header.
Each key carries a set of permission scopes that limit what it can access.

## Next steps

Once you've completed the quickstart, explore the [Products](/products/overview) to understand
Identity, Compliance, Asset Issuance, and Lending — or jump to the
[API Reference](/api/overview) for the full operation catalog.