# FAQ

### 1. What is the SPACE ID Web3 Name API?

The Web3 Name API is a free HTTP API that helps developers integrate Web3 domains to their apps, efficiently and securely. The API provides:

* Domain resolution: convert Web3 Domains into crypto addresses.
* Reverse resolution: retrieve the primary Web3 Domain uniquely linked to the crypto address.

### 2. How do I access the API?

You can access the API simply by sending requests to the endpoint URLs (as stated below) using the HTTP method GET.

### 3. How do I resolve a domain to an address using the API?

Send a GET request: 

`https://nameapi.space.id/getAddress?domain=spaceid.bnb`

Response: { "address": "0xb5932a6B7d50A966AEC6C74C97385412Fb497540"}

### 4. How do I reverse resolve an address to a domain?

Send a GET request:

`https://nameapi.space.id/getName?chainid=56&address=0xb5932a6B7d50A966AEC6C74C97385412Fb497540`

Response: {"name": "spaceid.bnb"}

### 5. What is the SPACE ID Web3 Name SDK, and what's the difference between SDK and API?

The SDK is a JavaScript/TypeScript library designed for client-side and backend integrations, allowing developers to directly query on-chain domain records inside their apps instead of handling API calls.

Conversely, the API is a RESTful service that enables developers to access SPACE ID’s domain name resolution via HTTP requests, making it ideal for server-side applications and large-scale integrations.

### 6. How do I install the SDK and resolve domain names?

Developers can install the Web3 Name SDK via:

`npm install @web3-name-sdk/core viem@^1.20` 

And check the complete SDK documents here:

<https://docs.space.id/developer-guide/web3-name-api-and-sdk/web3-name-sdk><br>

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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://docs.space.id/developer-guide/web3-name-api-and-sdk/faq.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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.