# The Reps Log > A workout log that lives inside Claude or ChatGPT. People say what they did in the gym ("3x10 goblet squat at 20") and it's logged through MCP tools. There is no app. It can also write a training plan and tell you what's next each session. The Reps Log is an MCP server. Everything happens in the person's own chatbot: the chatbot calls the tools, and each logging tool replies in one line, like "Logged 14.goblet-squat.1-3 - 3x10 @ 20kg." ## Connect - MCP server (streamable HTTP, OAuth 2.1 with dynamic client registration): https://www.therepslog.com/mcp - Signing in makes the account: email, then a code we send. There is no separate sign-up. - Claude (any plan, including Free): Customize > Connectors > + > Add custom connector, paste the URL, Add, sign in. Then switch it on in a chat under + > Connectors. Step by step: https://www.therepslog.com/connect/claude/ - ChatGPT (paid plans, web only): Settings > Security and login > Developer mode on, then Plugins > +, paste the URL, authentication OAuth, Create, sign in. In a chat, @-mention it. Step by step: https://www.therepslog.com/connect/chatgpt/ - For a client that can't sign in with OAuth: sign up at https://www.therepslog.com/signup/ for a private link that works on its own. Anyone with that link can log to the account, so it stays private. ## What it does - Logs sets, stretches and cardio: reps, weight, time, distance, stretch reach and RPE, in the units the person uses (kg or lb, cm or in, km, m or mi). Only what was said is recorded. - Fixes, skips and adds exercises mid-workout. Every set has a readable ID, like 14.goblet-squat.3, that never changes. - Writes a training plan, says what's next each session, and compares each finished workout against the plan. - Remembers history and personal bests, and summarises a week or a month. - Exports everything as JSON and Markdown, sent by email as download links. Export always works, paid or not. ## Pricing - Free for six months. No card. - Each friend who signs up and trains on three different days adds a month, up to six more. - A personal trainer's code gives twelve months free. - Then $10 a year. - Free accounts can log anything from the last 60 days; logging older history needs the paid tier. ## Links - [Sign up](https://www.therepslog.com/signup/) - [Log your workout with Claude](https://www.therepslog.com/connect/claude/) - [Log your workout with ChatGPT](https://www.therepslog.com/connect/chatgpt/) - [Privacy](https://www.therepslog.com/privacy/) - Contact: hello@therepslog.com