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

# Guides overview

> The steps to implement Agentcard in your product — from connecting your first user to a live agent with a card.

These guides walk you through implementing Agentcard, step by step. There are
two ways to put a card in your users' agents' hands:

<CardGroup cols={2}>
  <Card title="Card attachment" icon="credit-card">
    The user attaches a card they already have. No wallet to fund — the agent
    spends on the user's own card, within the limits they set.
  </Card>

  <Card title="Card creation" icon="wand-magic-sparkles">
    Issue brand-new virtual cards funded from a wallet, with per-card limits
    and single- or multi-use behavior.
  </Card>
</CardGroup>

## Recommended flow

The fastest way to production is **card attachment**: the user connects, brings
their own card, and your agent can spend — no wallet funding, no deposits to
wait on. Implement it in three steps:

<Steps>
  <Step title="User authentication">
    Connect the user to Agentcard from inside your own app. You build the
    screens; we send the one-time code and hand back the user's token.

    Follow the [user authentication guide](/companies/api/user-authentication).
  </Step>

  <Step title="Card attachment">
    The user attaches their own Visa card for their agent to spend with — no
    KYC, no wallet funding.

    Follow the [card attachment guide](/companies/guides/attach-card).
  </Step>

  <Step title="MCP integration">
    Plug the Agentcard MCP server into your agent so it can see and use the
    card.

    See [MCP server](/companies/guides/mcp-server).
  </Step>
</Steps>

## API basics

Every guide calls the same API: one base URL (`https://api.agentcard.sh`), a
platform access token in the `Authorization` header, and a single error
envelope everywhere. The [API reference](/companies/api/reference) covers all
of it, endpoint by endpoint, with a live playground.