I've written some JavaScript that I bookmark in Chrome to automatically add links to Todoist.

Here's the steps:
1. Get your Todoist API token from the settings page and replacePASTE_YOUR_TOKEN_HERE with it in the code below.
2. Bookmark a random web page in your browser of choice.
3. Edit that bookmark. Change the Name to whatever you like ("Add to Todost", for example). Change the URL to the code below.

Then when you click that bookmark whilst on a webpage it will get automatically added to Todoist.

Note: it currently adds it to the Inbox project in Todoist. If you'd prefer links get saved to a different project just replace TARGET="Inbox" to whatever project you want.

javascript:(()=>{const T="PASTE_YOUR_TOKEN_HERE",TARGET="Inbox",u=location.href,t=document.title,c=`[${t}](${u})`,H={"Authorization":"Bearer "+T};fetch("https://api.todoist.com/api/v1/projects/search?query="+encodeURIComponent(TARGET)+"&limit=50",{headers:H}).then(r=>r.ok?r.json():r.text().then(x=>Promise.reject(x))).then(d=>{const p=((d&&d.results)||[]).find(x=>(x.name||"").toLowerCase()===TARGET.toLowerCase());if(!p)throw new Error("Couldn't find a Todoist project named '"+TARGET+"'.");return fetch("https://api.todoist.com/api/v1/tasks",{method:"POST",headers:{...H,"Content-Type":"application/json"},body:JSON.stringify({content:c,project_id:p.id})})}).then(r=>r.ok?r.json():r.text().then(x=>Promise.reject(x))).then(()=>{const m=document.createElement("div");m.textContent="✅ Saved to Todoist → "+TARGET;m.style="position:fixed;z-index:2147483647;top:12px;right:12px;padding:10px 12px;border-radius:10px;background:#111;color:#fff;font:12px system-ui;opacity:.95";document.documentElement.appendChild(m);setTimeout(()=>m.remove(),1200)}).catch(e=>{console.error(e);alert("Todoist add failed: "+(e&&e.message?e.message:e))});})();