## Documentation Index

Fetch the complete documentation index at: [/llms.txt](https://docs.neynar.com/llms.txt)

Use this file to discover all available pages before exploring further.

This tutorial uses the [Neynar Rust SDK](https://github.com/neynarxyz/rust-sdk)

This SDK is in **beta** and may change in the future. Please let us know if you encounter any issues or have suggestions for improvement.

## Prerequisites

- Install [Rust](https://www.rust-lang.org/tools/install) (using [rustup](https://rustup.rs/))
- Get your Neynar API key from [neynar.com](/content/site-root.html)

## Project Setup

**Initialize Project Directory**

Shell

```
cargo new get-started-with-neynar-sdk
cd get-started-with-neynar-sdk
```

**Add Neynar SDK as a dependency**

Shell

```
cargo add --git https://github.com/neynarxyz/rust-sdk api
```

## Implementation: Look up a user by their verified address

Replace the contents of `src/main.rs` with the following code:

src/main.rs

```
  use neynar_sdk::apis::configuration as api_config;
  use neynar_sdk::apis::configuration::Configuration as ApiConfig;
  use neynar_sdk::apis::user_api::{
      FetchBulkUsersByEthOrSolAddressParams, fetch_bulk_users_by_eth_or_sol_address,
  };
  use neynar_sdk::models::BulkUserAddressType::VerifiedAddress;
  use reqwest::Client;

#[tokio::main]
async fn main() -> {
  let configuration = ApiConfig {
      base_path: "https://api.neynar.com/v2".to_string(),
      client: Client::builder().connection_verbose(true).build().unwrap(),
      user_agent: Some("rust-sdk-demo".to_string()),
      api_key: Some(api_config::ApiKey {
          prefix: None,
          key: "NEYNAR_API_DOCS".to_string(),
      }),
      basic_auth: None,
      bearer_access_token: None,
      oauth_access_token: None,
  };

let addresses = "0xBFc7CAE0Fad9B346270Ae8fde24827D2D779eF07".to_string();
  let params = FetchBulkUsersByEthOrSolAddressParams {
      addresses,
      address_types: Some(vec![VerifiedAddress]),
      viewer_fid: None,
      x_neynar_experimental: None,
  };

let result = fetch_bulk_users_by_eth_or_sol_address(&configuration, params).await;

match result {
      Ok(response) => {
          println!("Users: {:?}", response.additional_properties);
      }
      Err(err) => {
          eprintln!("Failed to fetch users: {:?}", err);
          panic!("User fetch failed");
      }
  }
}
```

## Running the project

Shell

```
cargo run
```

## Result

You should see a response similar to this (formatted for readability):

Shell

```
Users [{
    fid: 20603,
    username: "topocount.eth",
    display_name: "Topocount",
    // ...other fields...
}]
```

## Congratulations! You successfully set up the [Neynar Rust SDK](https://github.com/neynarxyz/rust-sdk) and used it to look up a user by their address!

### Ready to start building?

Get your subscription at [neynar.com](/content/site-root.html) and reach out to us on [Slack](/content/slack/index.html) with any questions!