diff --git a/src/main.rs b/src/main.rs
index 2958899..f1ef24e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,5 @@
 use std::{
+    env,
     fmt::Write,
     fs::{self, File},
     io::{self, BufRead, BufReader},
@@ -7,7 +8,7 @@ use std::{
 use clap::{Args, Parser, Subcommand};
 use color_eyre::eyre::{bail, ContextCompat, Result};
 use regex::Regex;
-use reqwest::Client;
+use reqwest::{header, Client};
 use serde::Deserialize;
 
 #[derive(Parser)]
@@ -84,7 +85,7 @@ fn parse_pr(pr: &str) -> Result<u32> {
     let re = Regex::new(r"^[0-9]*$")?;
     let re2 = Regex::new(r"^https://github.com/NixOS/nixpkgs/pull/([0-9]*)$")?;
     if let Some(caps) = re.captures(pr) {
-        Ok(caps[1].parse::<u32>()?)
+        Ok(caps[0].parse::<u32>()?)
     } else if let Some(caps) = re2.captures(pr) {
         Ok(caps[1].parse::<u32>()?)
     } else {
@@ -93,6 +94,7 @@ fn parse_pr(pr: &str) -> Result<u32> {
 }
 
 async fn get_pr(pr: u32, client: &Client) -> Result<PR> {
+    eprintln!("https://api.github.com/repos/nixos/nixpkgs/pulls/{}", pr);
     let request = client
         .get(format!(
             "https://api.github.com/repos/nixos/nixpkgs/pulls/{}",
@@ -103,8 +105,13 @@ async fn get_pr(pr: u32, client: &Client) -> Result<PR> {
     let v: PR = serde_json::from_str(&text)?;
     Ok(v)
 }
+
 async fn contains(branch: &str, pr: &PR, client: &Client) -> Result<bool> {
     if let Some(sha) = &pr.merge_commit_sha {
+        eprintln!(
+            "https://api.github.com/repos/nixos/nixpkgs/compare/{}...{}",
+            branch, sha
+        );
         let req = client
             .get(format!(
                 "https://api.github.com/repos/nixos/nixpkgs/compare/{}...{}",
@@ -148,7 +155,19 @@ fn get_local_nixp_rev() -> Result<String> {
 #[tokio::main]
 async fn main() -> Result<()> {
     let cli = Cli::parse();
-    let client = Client::builder().user_agent("nixp-meta tool").build()?;
+    let token = env::var("GH_TOKEN");
+    let client = Client::builder().user_agent("nixp-meta tool");
+    let mut headers = header::HeaderMap::new();
+    match token {
+        Ok(token) => {
+            // Consider marking security-sensitive headers with `set_sensitive`.
+            let mut auth_value = header::HeaderValue::from_str(&format!("token {}", token))?;
+            auth_value.set_sensitive(true);
+            headers.insert(header::AUTHORIZATION, auth_value);
+        }
+        Err(_) => eprintln!("Could not get GH_TOKEN, requests will be unauthorized"),
+    };
+    let client = client.default_headers(headers).build()?;
     match &cli.command {
         CliCommands::Track(opts) => {
             let pr = parse_pr(&opts.pr)?;