> ## Documentation Index
> Fetch the complete documentation index at: https://resend.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Retrieve Topic

> Retrieve a topic by its ID.

export const ResendParamField = ({children, body, path, ...props}) => {
  const [lang, setLang] = useState(() => {
    return localStorage.getItem('code') || '"Node.js"';
  });
  useEffect(() => {
    const onStorage = event => {
      const key = event.detail.key;
      if (key === 'code') {
        setLang(event.detail.value);
      }
    };
    document.addEventListener('mintlify-localstorage', onStorage);
    return () => {
      document.removeEventListener('mintlify-localstorage', onStorage);
    };
  }, []);
  const toCamelCase = str => typeof str === 'string' ? str.replace(/[_-](\w)/g, (_, c) => c.toUpperCase()) : str;
  const resolvedBody = useMemo(() => {
    const value = JSON.parse(lang);
    return value === 'Node.js' ? toCamelCase(body) : body;
  }, [body, lang]);
  const resolvedPath = useMemo(() => {
    const value = JSON.parse(lang);
    return value === 'Node.js' ? toCamelCase(path) : path;
  }, [path, lang]);
  return <ParamField body={resolvedBody} path={resolvedPath} {...props}>
      {children}
    </ParamField>;
};

## Path Parameters

<ResendParamField path="topic_id" type="string" required>
  The Topic ID.
</ResendParamField>

<RequestExample>
  ```ts Node.js theme={"theme":{"light":"github-light","dark":"vesper"}}
  import { Resend } from 'resend';

  const resend = new Resend('re_xxxxxxxxx');

  const { data, error } = await resend.topics.get(
    'b6d24b8e-af0b-4c3c-be0c-359bbd97381e',
  );
  ```

  ```php PHP theme={"theme":{"light":"github-light","dark":"vesper"}}
  $resend = Resend::client('re_xxxxxxxxx');

  $resend->topics->get('b6d24b8e-af0b-4c3c-be0c-359bbd97381e');
  ```

  ```python Python theme={"theme":{"light":"github-light","dark":"vesper"}}
  import resend

  resend.api_key = "re_xxxxxxxxx"

  resend.Topics.get("b6d24b8e-af0b-4c3c-be0c-359bbd97381e")
  ```

  ```ruby Ruby theme={"theme":{"light":"github-light","dark":"vesper"}}
  require "resend"

  Resend.api_key = "re_xxxxxxxxx"

  Resend::Topics.get("b6d24b8e-af0b-4c3c-be0c-359bbd97381e")
  ```

  ```go Go theme={"theme":{"light":"github-light","dark":"vesper"}}
  import (
  	"context"

  	"github.com/resend/resend-go/v3"
  )

  func main() {
  	client := resend.NewClient("re_xxxxxxxxx")

  	client.Topics.GetWithContext(
  		context.TODO(),
  		"b6d24b8e-af0b-4c3c-be0c-359bbd97381e",
  	)
  }
  ```

  ```rust Rust theme={"theme":{"light":"github-light","dark":"vesper"}}
  use resend_rs::{Resend, Result};

  #[tokio::main]
  async fn main() -> Result<()> {
    let resend = Resend::new("re_xxxxxxxxx");

    let _topic = resend
      .topics
      .get("b6d24b8e-af0b-4c3c-be0c-359bbd97381e")
      .await?;

    Ok(())
  }
  ```

  ```java Java theme={"theme":{"light":"github-light","dark":"vesper"}}
  import com.resend.*;

  public class Main {
    public static void main(String[] args) {
      Resend resend = new Resend("re_xxxxxxxxx");

      GetTopicResponseSuccess topic = resend.topics().get("b6d24b8e-af0b-4c3c-be0c-359bbd97381e");
    }
  }
  ```

  ```csharp .NET theme={"theme":{"light":"github-light","dark":"vesper"}}
  using Resend;

  IResend resend = ResendClient.Create( "re_xxxxxxxxx" ); // Or from DI

  var resp = await resend.TopicRetrieveAsync( new Guid( "b6d24b8e-af0b-4c3c-be0c-359bbd97381e" ) );
  Console.WriteLine( "Topic Id={0}", resp.Content.Id );
  ```

  ```bash cURL theme={"theme":{"light":"github-light","dark":"vesper"}}
  curl -X GET 'https://api.resend.com/topics/b6d24b8e-af0b-4c3c-be0c-359bbd97381e' \
       -H 'Authorization: Bearer re_xxxxxxxxx'
  ```

  ```bash CLI theme={"theme":{"light":"github-light","dark":"vesper"}}
  resend topics get b6d24b8e-af0b-4c3c-be0c-359bbd97381e
  ```
</RequestExample>

<ResponseExample>
  ```json Response theme={"theme":{"light":"github-light","dark":"vesper"}}
  {
    "object": "topic",
    "id": "b6d24b8e-af0b-4c3c-be0c-359bbd97381e",
    "name": "Weekly Newsletter",
    "description": "Weekly newsletter for our subscribers",
    "default_subscription": "opt_in",
    "visibility": "public",
    "created_at": "2026-04-08T00:11:13.110779+00:00"
  }
  ```
</ResponseExample>