export default { async fetch(req) { const h={'Access-Control-Allow-Origin':'*', 'Access-Control-Allow-Headers':'*', 'Access-Control-Allow-Methods':'POST,OPTIONS'}; if(req.method==='OPTIONS')return new Response(null,{headers:h}); const r=await fetch('https://api.anthropic.com/v1/messages',{ method:'POST',headers:{'Content-Type':'application/json', 'x-api-key':req.headers.get('x-api-key'), 'anthropic-version':'2023-06-01'},body:req.body}); const d=await r.json(); return new Response(JSON.stringify(d),{headers:{...h, 'Content-Type':'application/json'}}); } }