# Welcome

**Klink is a non-custodial Solana smart-wallet for AI agents.** It pairs an on-chain policy engine (caps, allowlists, expiry, deployed-fraction) with off-chain rich rules (URL allowlist, time-of-day windows) and treats Solana transaction history as the audit trail by default.

If you build agents that spend, this is the wallet between your agent and its money.

## Three actors, three blast radii

| Actor           | Holds                               | Authority                                                       | If credential leaks                                                                   |
| --------------- | ----------------------------------- | --------------------------------------------------------------- | ------------------------------------------------------------------------------------- |
| **Human owner** | Phantom keypair on-device           | Master, configures policy, funds wallet, can revoke any session | Total loss (same as any Solana wallet)                                                |
| **Backend**     | Session keypair (encrypted at rest) | Delegated, co-signs spend txs subject to on-chain policy        | Bounded by `daily_cap` × time-to-revoke; restricted by recipient + program allowlists |
| **Agent**       | Bearer API key                      | None on-chain, talks to the backend over HTTP                   | Zero direct on-chain risk                                                             |

The agent never crosses the trust boundary. The session keypair stays in the backend, never on the agent's machine. The owner key never leaves the human's device.

## What you'll find here

* [**Introduction**](/klink-docs/getting-started/what-is-klink.md): what Klink is, who it's for, why Solana
* [**Quickstart**](/klink-docs/getting-started/quickstart.md): sign in, create a vault, hand an agent a key, audit a spend
* [**Core Concepts**](/klink-docs/core-concepts/overview.md): Vault, Sessions, Policies, Budgets, Audit Trail, Yield
* [**Architecture**](/klink-docs/core-concepts/overview-1.md): the three-layer model with diagrams
* [**Developer Resources**](/klink-docs/developer-resources/sdk.md): SDK, CLI, and the agent skill
* [**Reference**](/klink-docs/reference/glossary.md): glossary, FAQ, security disclosures, roadmap

## Status

Klink is in **beta on Solana devnet**. The on-chain program enforces every policy described in these docs; the dashboard, HTTP API, and agent skill are live. The SDK and CLI are on the way, see [Roadmap](/klink-docs/reference/roadmap.md). For mainnet readiness, see [Risks & Disclosures](/klink-docs/reference/risks.md).


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://klink-4.gitbook.io/klink-docs/readme.md?ask=<question>
```

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The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.