Use Meso in Claude or ChatGPT
Connect your Meso account and talk to your training: ask what today's session is, compare what you lifted with what was prescribed, or log a session by typing or dictating it. The assistant works from your real Meso data; your program still lives in Meso.
Connector address
You also find it, with a copy button, in the Meso app under Profile → Use Meso in Claude or ChatGPT.
Before you start
You need a Meso account. Start free.
Claude
- Open Settings → Connectors → Add custom connector.
- Paste the connector address and add it.
- Claude opens Meso's sign-in. Sign in with your Meso account and approve the connection.
ChatGPT
- Turn on developer mode, then open Settings → Apps & Connectors → Create.
- Paste the connector address as the connector URL.
- Sign in to Meso when ChatGPT asks, and approve the connection.
What the connection can do
| Tool | What it does |
|---|---|
get_program | Reads your current cycle and phase, and each training day's exercises with prescribed sets, reps, RPE target and rest. Read-only. |
list_sets | Reads your recently logged sets, session by session. |
log_set, batch_log_sets | Logs completed sets to your program — one set, or a whole session from a text or voice summary. |
When you log a whole session, the assistant can ask Meso's four readiness questions (sleep, soreness, fatigue, stress). A poor or severe day then stays out of your progression, the same as an adjusted session in the app. It only sends answers you gave.
Not yet: swapping exercises, changing equipment, or rebuilding your program from a chat. Make those changes in the Meso app.
Access and privacy
- The assistant acts as you: every call runs under your own sign-in, so it can read and log only your data. Meso holds no key that reaches anyone else's.
- Access is all or nothing: a connected assistant can use every tool above.
- What you say in the chat is handled by Claude or ChatGPT under their terms; Meso receives only the tool calls.
- Meso's privacy notice covers connected assistants.
Revoke access
In the Meso app, go to Profile → Use Meso in Claude or ChatGPT → Connected assistants and choose Revoke. That ends the assistant's sign-in; to use Meso there again you'd connect it again. You can also remove the connector in Claude or ChatGPT.
For agents
The member endpoint uses OAuth 2.1; its protected-resource metadata is at https://meso.fitness/.well-known/oauth-protected-resource/member/mcp. The public product server https://meso.fitness/mcp needs no sign-in and answers questions about Meso's methodology, pricing and availability. Details for developers are in the developer portal.
Scope
Meso is for resistance-training programming. It doesn't give nutrition, cardio-endurance, injury or medical advice; for sharp or worsening pain, see a professional.