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

# Sly Documentation

> The agentic economy platform — stablecoin payments, agent wallets, and multi-protocol commerce for AI agents.

Sly is the payments platform for AI agents. Agents transact with merchants, each other, and humans using real money — stablecoins, card networks, and fiat rails — under formal identity, spending, and governance controls.

## What you can build

<CardGroup cols={2}>
  <Card title="Agent-driven payments" icon="robot" href="/agents/overview">
    Let AI agents pay merchants, subscribe to services, and settle invoices under policy-bound wallets and KYA verification tiers.
  </Card>

  <Card title="Multi-protocol commerce" icon="network-wired" href="/protocols/overview">
    One SDK, eight protocols: UCP, ACP, AP2, x402, MPP, A2A, MCP, and Cards. Pick the one that fits your integration partner.
  </Card>

  <Card title="Money streaming" icon="water" href="/guides/start-money-stream">
    Per-second payment flows with configurable buffers, runways, and programmable termination.
  </Card>

  <Card title="Stablecoin payouts" icon="coins" href="/guides/cross-border-transfer">
    Cross-border transfers in seconds with live FX quoting, auditable settlement, and on-chain receipts.
  </Card>
</CardGroup>

## Two paths to your first integration

<CardGroup cols={2}>
  <Card title="Guided wizard (recommended)" icon="wand-magic-sparkles" href="/onboarding/overview">
    Pick a use-case template — API monetization, e-commerce, agent commerce, or recurring payments. The wizard walks you through every step and hands you working credentials in 10-15 minutes.
  </Card>

  <Card title="5-minute API quickstart" icon="bolt" href="/get-started/quickstart">
    Raw cURL or Node SDK. Best if you've integrated payments before and want to understand the primitives first.
  </Card>
</CardGroup>

## Or start from scratch

<Steps>
  <Step title="Apply for beta access">
    [app.getsly.ai/auth/signup](https://app.getsly.ai/auth/signup) — Sly is currently invitation-only. Approval in 1-3 business days.
  </Step>

  <Step title="Complete signup with your invite code">
    Choose email + password or Google/GitHub SSO.
  </Step>

  <Step title="Pick your onboarding path">
    Guided wizard or raw API — [see the onboarding overview](/onboarding/overview).
  </Step>

  <Step title="Ship">
    Move to [live](/get-started/environments) when you're ready. Swap `pk_test_` for `pk_live_` — same API, real money.
  </Step>
</Steps>

## Built for agents

Sly is agent-first from the ground up. Every core capability has a corresponding MCP tool, A2A skill, and Ed25519-authenticated session interface, so autonomous agents can transact without human-readable credentials ever touching the wire.

* **[KYA tiers](/agents/kya-tiers)** — formal verification levels (0–3) with graduated spending limits
* **[Wallet policies](/agents/wallet-policies)** — per-agent spending rules, kill-switch, and approval workflows
* **[Ed25519 auth](/agents/ed25519-keypair-auth)** — short-lived session tokens issued via challenge-response
* **[MCP catalog](/agents/mcp-tool-catalog)** — drop-in Claude Desktop integration
* **[A2A marketplace](/agents/a2a-agent-card)** — agents discover each other's skills and transact peer-to-peer
* **[llms.txt + llms-full.txt](/agents/llms-txt)** — agent-readable docs, regenerated on every deploy

## Looking for something specific?

<CardGroup cols={3}>
  <Card title="API Reference" icon="code" href="/api-reference">
    Full REST reference for every endpoint.
  </Card>

  <Card title="SDKs" icon="cube" href="/sdks/overview">
    Node.js SDK, CLI, and MCP server.
  </Card>

  <Card title="Webhooks" icon="webhook" href="/webhooks/overview">
    Event catalog, signing, and replay.
  </Card>

  <Card title="Recipes" icon="code-branch" href="/recipes/overview">
    Copy-paste solutions — transfers, refunds, agents, protocols, webhooks.
  </Card>

  <Card title="Architecture patterns" icon="diagram-project" href="/architecture/overview">
    Reference shapes — event-driven, queue-backed workers, state machines.
  </Card>

  <Card title="Migrating from elsewhere?" icon="right-left" href="/migration/overview">
    Compose Sly with existing Stripe / Circle / card-network integrations.
  </Card>
</CardGroup>