> For the complete documentation index, see [llms.txt](https://city-protocol.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://city-protocol.gitbook.io/docs/neofinance-as-a-service/overview.md).

# Overview

Neofinance-as-a-Service (NaaS) is the comprehensive infrastructure that allows any project, founder, or community to spin up neobanking features without building the underlying financial stack from scratch.

Before City Protocol, integrating these features was **complex, high-cost, and uncertain.** A project would have to connect individually to yield providers, swap routers, vault architectures, and lending market providers.

> **City Protocol's NaaS offering transforms this paradigm.** 

We provide a simple, modular, and low-cost integration layer. By connecting to City Protocol's SDK/API, projects instantly gain access to our entire ecosystem of mature, industry-leading platforms across all core verticals.

***

### First Steps

Ready to integrate NaaS into your product? Just follow these simple steps and start building in minutes.

{% stepper %}
{% step %}

#### **Install the SDK**

Add the `@cityprotocol/core` package to your project along with `viem`:

```llvm
bun add @cityprotocol/core viem
```

{% endstep %}

{% step %}

#### **Configure Your Vault**

Use the `createVault` method via the YieldVaultFactory to define your vault's name, symbol, and underlying asset. Configure fee rates (management, performance, entry/exit) and choose whether to enable cooldown mechanics or whitelist controls based on your use case.
{% endstep %}

{% step %}

#### **Connect and Go**

Instantiate a `CityClient` with your Viem wallet client, and you're ready to execute deposits, redemptions, and read vault state. Pair it with `CityPortfolioClient` for subgraph queries to power transaction history, vault discovery, and TVL charts.
{% endstep %}
{% endstepper %}