# Anchor Server

The **Anchor Server** is the SDK that helps developers build and operate anchor services. It provides the server-side infrastructure to run an anchor that other users can discover and interact with.

### **Purpose**

The Anchor Server SDK provides:

* **HTTP server infrastructure** with built-in request routing
* **Request validation** and authentication
* **Signature verification** for client requests
* **Metadata publishing** for service discovery
* **Queue management** for async operations
* **Error handling** with standardized error responses

### **Who Uses It**

Anchor Servers are operated by:

* **Financial institutions** providing fiat on/off ramps
* **Liquidity providers** offering FX services
* **Bridge operators** enabling cross-chain transfers
* **KYC providers** offering identity verification
* **Payment processors** facilitating settlements

### **Advantages of the SDK**

Building an anchor from scratch requires handling many complex concerns:

* Secure authentication and signature verification
* Service metadata formatting and publishing
* Request/response validation
* Asynchronous operation management
* Error handling and status codes

The Anchor Server SDK handles all of this, letting you focus on your business logic. It provides:

1. **Standardized APIs**: All anchors implement the same interfaces, making integration easier for clients
2. **Security**: Built-in signature verification and authentication
3. **Reliability**: Queue management and retry logic for async operations
4. **Discoverability**: Automatic metadata publishing for the Resolver
5. **Compliance**: Structured patterns for KYC and regulatory requirements

### **Example: Running an FX Anchor Server**

{% @github-files/github-code-block url="<https://github.com/KeetaNetwork/keetanet-examples/blob/main/src/anchor/fx-server.ts>" %}


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