diff --git a/src/main.rs b/src/main.rs
index d91842a..2291f8f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,6 +3,7 @@ mod auth;
 mod config;
 mod oauth;
 mod thread;
+mod xquik;
 
 use clap::{Parser, Subcommand};
 use config::{ApiKeys, Config, Credentials};
@@ -147,6 +148,34 @@ async fn main() {
                 std::process::exit(1);
             }
 
+            if xquik::backend_enabled() {
+                if chunks.len() == 1 {
+                    let config = match xquik::config_from_env() {
+                        Ok(config) => config,
+                        Err(e) => {
+                            eprintln!("Error: {e}");
+                            std::process::exit(1);
+                        }
+                    };
+
+                    match xquik::create_tweet(&config, &chunks[0]).await {
+                        Ok(xquik::XquikPostResult::Posted(id)) => {
+                            println!("Tweet posted with Xquik! ID: {id}");
+                        }
+                        Ok(xquik::XquikPostResult::Accepted(id)) => {
+                            println!("Tweet accepted by Xquik. Confirmation pending: {id}");
+                        }
+                        Err(e) => {
+                            eprintln!("Failed to post tweet with Xquik: {e}");
+                            std::process::exit(1);
+                        }
+                    }
+                    return;
+                }
+
+                eprintln!("Xquik backend supports single tweets only. Using existing X API auth for threads.");
+            }
+
             let config = load_config_or_exit();
 
             if chunks.len() == 1 {
diff --git a/src/xquik.rs b/src/xquik.rs
new file mode 100644
index 0000000..a7cf478
--- /dev/null
+++ b/src/xquik.rs
@@ -0,0 +1,171 @@
+use serde::{Deserialize, Serialize};
+use std::env;
+
+const DEFAULT_BASE_URL: &str = "https://xquik.com";
+
+#[derive(Debug, PartialEq)]
+pub enum XquikPostResult {
+    Posted(String),
+    Accepted(String),
+}
+
+#[derive(Debug)]
+pub struct XquikConfig {
+    api_key: String,
+    account: String,
+    base_url: String,
+}
+
+#[derive(Serialize)]
+struct CreateTweetRequest<'a> {
+    account: &'a str,
+    text: &'a str,
+}
+
+#[derive(Deserialize)]
+struct CreateTweetResponse {
+    #[serde(rename = "tweetId")]
+    tweet_id: Option<String>,
+    #[serde(rename = "writeActionId")]
+    write_action_id: Option<String>,
+    message: Option<String>,
+    error: Option<String>,
+}
+
+pub fn backend_enabled() -> bool {
+    backend_is_xquik(
+        env::var("XCLI_BACKEND").ok().as_deref(),
+        env::var("X_BACKEND").ok().as_deref(),
+    )
+}
+
+fn backend_is_xquik(primary: Option<&str>, fallback: Option<&str>) -> bool {
+    primary
+        .or(fallback)
+        .map(|backend| backend.eq_ignore_ascii_case("xquik"))
+        .unwrap_or(false)
+}
+
+pub fn config_from_env() -> Result<XquikConfig, String> {
+    config_from_values(
+        env::var("XQUIK_API_KEY").ok().as_deref(),
+        env::var("XQUIK_ACCOUNT").ok().as_deref(),
+        env::var("XQUIK_API_BASE_URL").ok().as_deref(),
+    )
+}
+
+fn config_from_values(
+    api_key: Option<&str>,
+    account: Option<&str>,
+    base_url: Option<&str>,
+) -> Result<XquikConfig, String> {
+    let api_key = api_key.unwrap_or_default().trim();
+    if api_key.is_empty() {
+        return Err("XQUIK_API_KEY is required when XCLI_BACKEND=xquik".to_string());
+    }
+
+    let account = account.unwrap_or_default().trim();
+    if account.is_empty() {
+        return Err("XQUIK_ACCOUNT is required when XCLI_BACKEND=xquik".to_string());
+    }
+
+    let base_url = base_url
+        .map(str::trim)
+        .filter(|value| !value.is_empty())
+        .unwrap_or(DEFAULT_BASE_URL)
+        .trim_end_matches('/')
+        .to_string();
+
+    Ok(XquikConfig {
+        api_key: api_key.to_string(),
+        account: account.to_string(),
+        base_url,
+    })
+}
+
+pub async fn create_tweet(config: &XquikConfig, text: &str) -> Result<XquikPostResult, String> {
+    let client = reqwest::Client::new();
+    let response = client
+        .post(format!("{}/api/v1/x/tweets", config.base_url))
+        .header("X-API-Key", &config.api_key)
+        .json(&CreateTweetRequest {
+            account: &config.account,
+            text,
+        })
+        .send()
+        .await
+        .map_err(|e| format!("Request failed: {e}"))?;
+
+    let status = response.status().as_u16();
+    let body = response.text().await.unwrap_or_default();
+    parse_response(status, &body)
+}
+
+fn parse_response(status: u16, body: &str) -> Result<XquikPostResult, String> {
+    let parsed: CreateTweetResponse =
+        serde_json::from_str(body).map_err(|e| format!("Failed to parse Xquik response: {e}"))?;
+
+    match status {
+        200 => parsed
+            .tweet_id
+            .map(XquikPostResult::Posted)
+            .ok_or_else(|| "Xquik response did not include tweetId".to_string()),
+        202 => parsed
+            .write_action_id
+            .map(XquikPostResult::Accepted)
+            .ok_or_else(|| "Xquik response did not include writeActionId".to_string()),
+        _ => Err(parsed
+            .message
+            .or(parsed.error)
+            .unwrap_or_else(|| format!("Xquik request failed with status {status}"))),
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn backend_flag_accepts_xquik() {
+        assert!(backend_is_xquik(Some("xquik"), None));
+        assert!(backend_is_xquik(None, Some("XQUIK")));
+        assert!(!backend_is_xquik(Some("api"), Some("xquik")));
+    }
+
+    #[test]
+    fn config_requires_api_key() {
+        let err = config_from_values(None, Some("@xquik"), None).unwrap_err();
+        assert!(err.contains("XQUIK_API_KEY"));
+    }
+
+    #[test]
+    fn config_defaults_base_url() {
+        let config = config_from_values(Some("key"), Some("@xquik"), None).unwrap();
+        assert_eq!(config.base_url, DEFAULT_BASE_URL);
+    }
+
+    #[test]
+    fn config_trims_custom_base_url() {
+        let config =
+            config_from_values(Some("key"), Some("@xquik"), Some("https://example.test/")).unwrap();
+        assert_eq!(config.base_url, "https://example.test");
+    }
+
+    #[test]
+    fn parse_posted_response() {
+        let result = parse_response(200, r#"{"tweetId":"123"}"#).unwrap();
+        assert_eq!(result, XquikPostResult::Posted("123".to_string()));
+    }
+
+    #[test]
+    fn parse_accepted_response() {
+        let result = parse_response(202, r#"{"writeActionId":"456"}"#).unwrap();
+        assert_eq!(result, XquikPostResult::Accepted("456".to_string()));
+    }
+
+    #[test]
+    fn parse_error_message() {
+        let err = parse_response(401, r#"{"message":"Unauthorized"}"#).unwrap_err();
+        assert_eq!(err, "Unauthorized");
+    }
+}