# Integrate ANS into dApp

The API service provided by [aleo-name-service-api](/developer-guide/ans-indexer.md). We recommend that developers run their own Indexer or use the API service deliver by [Obscura](https://docs.obscura.network/), but developers can use the official ANS Indexer service for development and testing during the development phase.

### Query the primary name of an address

Check if an address has set a primary domain name. A 404 response means it has not been configured.

```typescript
// Replace "aleo1s......abcdef" with the address you want to lookup.
const address = "aleo1s......abcdef";
const response = await fetch(`https://testnet-api.aleonames.id/primary_name/${address}`);
const { name } = await response.json();
```

### Convert ANS name to address

Check if a domain name has a corresponding address. A 404 response indicates that it has not been registered. If the returned address is not an Aleo address, it means the domain is privately registered and not publicly disclosed.

```typescript
// Replace "test.ans" with your ANS name. 
// For private name, the address will be "Private Registration".
const name = "test.ans";
const response = await fetch(`https://testnet-api.aleonames.id/address/${name}`);
const { address } = await response.json();
```

### Convert ANS name\_hash to Human-readable Name

Convert an ANS name\_hash to its human-readable name. A 404 response indicates that the name has not been registered. The returned data includes a `balance` field, which represents the ACs (Aleo Credits) received by this ANS without a set password. Users can withdraw these ACs as needed.

```typescript
// Replace "2161886410952211525886505790676792679800209349697935268316503861742165891860field" with your ANS name_hash. 
const name_hash = "2161886410952211525886505790676792679800209349697935268316503861742165891860field";
const response = await fetch(`https://testnet-api.aleonames.id/hash_to_name/${name_hash}`);
const { name, balance } = await response.json();
```

### Query resolver content

Query a domain name's configured resolver content. A 404 response indicates it has not been set up. If configured

```typescript
// Replace "test.ans" with your ANS name. replace category with category you want to lookup.
const name = "test.ans";
const category = "btc";
const response = await fetch(`https://testnet-api.aleonames.id/resolver?name=${name}&category=${category}`);
const { content } = await response.json();
```

#### Query avatar

The avatar falls under a resolver category. To retrieve a domain name's assigned avatar, specify `category="avatar"`. If an avatar has been set up, the 'content' will point to the avatar image hosted on IPFS.


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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.aleonames.id/developer-guide/integrate-ans-into-dapp.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.