X Reply Copilot – AI Reply & Comment Assistant for X/Twitter

X Reply Copilot helps you write better replies and comments on X (Twitter) in seconds. Tap AI next to any post → get 3 context-aware draft replies → Fill or Copy → edit → send yourself. WHO IT'S FOR • Creators and founders who reply on X daily • People who want higher-quality AI comments without generic fluff • Bilingual users who need Chinese and English reply drafts KEY FEATURES • AI reply assistant for X / Twitter posts and threads • AI comment drafts grounded in post text and thread context • Tone chips: add value, ask, agree, soft pushback, professional, casual • Reply language: Auto / Chinese / English • Fill into the composer or copy to clipboard • Optional “your voice” samples so drafts match how you write • Draggable floating panel; dock to screen edge • Interface: English or 中文 (switch anytime) • Bring your own API key (OpenAI, DeepSeek, OpenRouter, Kimi for Coding, Anthropic — chat completions, Anthropic Messages, and OpenAI Responses formats) HOW IT WORKS 1. Install and set your API Key in the popup 2. Open x.com or twitter.com 3. Click the AI button on a post 4. Choose tone & language → Generate 3 drafts 5. Fill or copy, review, then post WHY NOT “AUTO REPLY” X Reply Copilot is a writing copilot—not a bot farm. Drafts are suggestions only. You stay in control of what goes live. PRIVACY & CONTROL • API key stays in your browser storage (BYOK) • Only the post context you choose is sent to your configured model API • No automatic posting, likes, or follows Pro (coming soon): hosted credits without your own key, stronger models, and richer media context.