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Anneal for Claude, ChatGPT and Gemini

Free · No account · Updated November 2026

Anneal runs a small public server your assistant can call for four lifting calculations: an estimated one rep max, barbell plate math, a warm-up ramp, and an explanation of the rule the app uses before it can suggest a deload. Add it once and ask in plain words.

The server address

https://anneal.fit/mcp

It speaks the Model Context Protocol (MCP) over HTTPS, with no sign-in. The same address works in every assistant below. Inputs are used for the answer and not stored.

Set it up

Claude

1. Open Claude on the web or desktop and go to Settings, then Connectors.
2. Choose Add custom connector.
3. Name it Anneal and paste https://anneal.fit/mcp as the URL. Leave authentication off.
4. Start a chat and ask a question from the list below. Connectors added on the web or desktop also work in the Claude mobile apps.

Anneal has been submitted to the Claude connector directory. Once the listing is live you can add it from the directory in one click instead of pasting the URL.

ChatGPT

1. Open Settings, then Connectors, then Advanced, and turn on Developer mode. Availability depends on your plan.
2. Back in Connectors choose Create.
3. Name it Anneal, paste https://anneal.fit/mcp as the server URL, and set authentication to none.
4. In a new chat, enable the Anneal connector from the tools menu and ask away.

Gemini

1. Open Gemini settings and find Connected apps.
2. Add a custom app or connector and paste https://anneal.fit/mcp.
3. Ask a question in a new chat. The menu names shift between releases; the setting to find is the one for custom apps.

What it can do

• Estimate one rep max. Give a set (weight, reps, and optionally reps in reserve) and get the Epley estimate in pounds and kilograms, plus the training load at every percentage from 95 down to 70.
• Plate math. Give a target weight and get the plates for each side of the bar. Tell it your bar weight and which plates you own and it works around a partial home-gym set, with the nearest loadable weights when the exact number is not possible.
• Warm-up ramp. Give a working weight and get one to five warm-up sets as the Anneal app would build them: barbell rungs on the plate grid, lighter rungs rounded to bigger plates, or snapped to a machine or dumbbell step if you give the increment.
• Explain the deload rule. Give the days since your first logged session and the sessions you have completed, and it explains the gate the app applies (21 days and 8 sessions), whether your numbers clear it, and which signals the app reads after that. It explains the rule; it does not tell you to deload.

Every answer ends with a link back to anneal.fit so you can find the app.

Things to ask

• What is my estimated max from 185 for 5?
• I benched 100 kg for 6 with 2 in reserve. What is that as a 1RM?
• How do I load 315 on the bar?
• I only have 45s, 25s and 10s at home. Closest I can get to 230?
• Build me three warm-up sets for a 225 squat.
• I have trained for 10 days and done 3 sessions. Why has Anneal not suggested a deload?

Privacy

The server has no accounts and keeps nothing. The weights, reps and session counts you send are used to compute the answer and are not stored or logged by Anneal. Cloudflare, which hosts anneal.fit, keeps its standard request logs, as described in the Privacy Policy. Your assistant's own data handling is covered by its provider's terms.

The calculators are general lifting arithmetic. They do not know your health history and are not medical advice.

Common questions

Do I need an Anneal account?

No. The server has no sign-in. Anyone can add it to their assistant and use the four calculators.

What happens to the numbers I type?

They are used for the answer and not stored. The server keeps no record of tool calls or their inputs. The only logging is Cloudflare's standard request log for anneal.fit, which the Privacy Policy already describes.

Does the deload tool tell me whether to deload?

No. It explains the rule the Anneal app applies and checks the first gate (21 days of history and 8 completed sessions) against the numbers you give. Whether to deload comes from a full training log, and from you.

Can it read my Anneal history?

Not yet. These four tools work on the numbers you give them in the chat. A signed-in version that reads your own log is being looked at.

Where can I report a problem?

Email [email protected].