Health & fitness
Trainerize
Clients, programs, check-ins and messages for your Trainerize business.
14 endpoints
Your AI agent reviews weekly check-ins, nudges clients who missed one and onboards new clients with their plan. Sign in to Kahunas once in your own Cloud Browser. No API, no zaps.
5 tools Read and write
Kahunas has no MCP server, no ChatGPT or Claude app and no public API docs. Its Zapier app polls check-ins and packages and has one action, create client (checked 9 Nov 2026). Cotlet runs 5 Kahunas tools hosted, over MCP for agents and REST for scripts, in your own coach login.
| What you need | Kahunas API | Zapier app | Cotlet |
|---|---|---|---|
| Read check-ins | No docs | Polling | Yes |
| Add clients | No docs | Yes | Yes, after your OK |
| Plans and messages | No docs | No | Yes, after your OK |
| Ask in ChatGPT or Claude | No | No | Yes |
| Setup | None possible | Zaps to build | Sign in once |
Checked 8 Nov 2026. Sources: Kahunas on Zapier · Kahunas pricing · Kahunas web app
Once, in a browser we host for you.
One address in its settings.
It drafts the work, you OK what customers get.
We never keep your Kahunas password, and nothing a client sees changes until you approve it. Who can see your session
Sign in to Kahunas in a Cloud Browser. Create a Cotlet account, open Kahunas in its Cloud Browser, sign in with your coach login and press Enable for agents.
Add the Cotlet address. Enter https://cotlet.dev/mcp/v1 as the MCP server or connector URL in your agent.
Let the agent in. Chat apps open a Cotlet sign-in page. Editors, n8n and scripts send an API key made in the console.
Kahunas shares the address https://cotlet.dev/mcp/v1 with every other app you enable, so one connector covers them all. Turned Kahunas on after connecting? Refresh the connector and the 5 tools appear.
Settings > Connectors > Add custom connector
URL: https://cotlet.dev/mcp/v1/connect
Claude Code:
claude mcp add --transport http cotlet \
https://cotlet.dev/mcp/v1 \
--header "Authorization: Bearer $COTLET_API_KEY" Settings > Apps & Connectors > Create
MCP server URL: https://cotlet.dev/mcp/v1/connect
Authentication: OAuth // ~/.cursor/mcp.json
{
"mcpServers": {
"cotlet": {
"url": "https://cotlet.dev/mcp/v1",
"headers": { "Authorization": "Bearer ${env:COTLET_API_KEY}" }
}
}
} # ~/.codex/config.toml
[mcp_servers.cotlet]
url = "https://cotlet.dev/mcp/v1"
bearer_token_env_var = "COTLET_API_KEY" MCP Client Tool (inside an AI Agent)
Transport: HTTP Streamable
URL: https://cotlet.dev/mcp/v1
Auth: Bearer, <your key>
Tool: kahunas_read Make: MCP Client > Call a tool
Zapier: MCP Client by Zapier > Run Tool
Server URL: https://cotlet.dev/mcp/v1
Token: <your key>
Tool: kahunas_write Reading clients and check-ins runs at once.
Returns clients with ID, package, next check-in date and whether the last one is missing.
MCP callkahunas_read → list_clients
REST endpointGET https://cotlet.dev/api/v1/kahunas/clients
| Name | Type | Description |
|---|---|---|
| query string | string | Name or email. |
| missed_checkin boolean | boolean | Only clients who missed their last check-in. |
| page integer | integer | Page number. Default: 1. |
{
"clients": [
{
"client_id": "K-30121",
"name": "Sam Rivera",
"package": "12-week transformation",
"next_checkin": "2026-11-11",
"missed_last": false
}
],
"page": 1
} Returns check-ins with client, date, weight and other metrics, and the answers to your form.
MCP callkahunas_read → list_checkins
REST endpointGET https://cotlet.dev/api/v1/kahunas/checkins
| Name | Type | Description |
|---|---|---|
| date_from string required | string | ISO date. |
| date_to string | string | ISO date. |
{
"date_from": "2026-11-03",
"date_to": "2026-11-09"
} {
"checkins": [
{
"client": "Jess Taylor",
"date": "2026-11-08",
"weight_kg": 64.1,
"answers": [
{
"q": "Energy 1-10",
"a": "5"
},
{
"q": "Adherence %",
"a": "70"
}
]
}
]
} Anything a client sees in their app waits for your OK.
Creates the client on the package with start date and check-in schedule; Kahunas sends the app invite. By default you confirm each call; you can switch that off for this tool.
MCP callkahunas_write → add_client
REST endpointPOST https://cotlet.dev/api/v1/kahunas/clients
| Name | Type | Description |
|---|---|---|
| name string required | string | Full name. |
| email string required | string | Email for the invite. |
| package string required | string | Package name. |
| start string | string | ISO start date. |
{
"name": "Jane Doe",
"email": "jane@example.com",
"package": "package"
} {
"client_id": "K-30188",
"name": "Maya Ortiz",
"package": "12-week transformation",
"status": "Invited"
} Puts the plan on the client; they see it in their app. By default you confirm each call; you can switch that off for this tool.
MCP callkahunas_write → assign_workout_plan
REST endpointPOST https://cotlet.dev/api/v1/kahunas/clients/{client_id}/workout-plan/assign
| Name | Type | Description |
|---|---|---|
| client_id string required | string | Client ID from list_clients. |
| plan string required | string | Plan name from your library. |
| type string | string | workout or nutrition. Default: workout. |
{
"client_id": "client_8c41d2",
"plan": "plan"
} {
"client_id": "K-30188",
"plan": "Upper/Lower 4-day",
"type": "workout"
} Posts the message in the client's Kahunas chat. By default you confirm each call; you can switch that off for this tool.
MCP callkahunas_write → send_message
REST endpointPOST https://cotlet.dev/api/v1/kahunas/clients/{client_id}/messages
| Name | Type | Description |
|---|---|---|
| client_id string required | string | Client ID from list_clients. |
| text string required | string | Message. |
{
"client_id": "client_8c41d2",
"text": "text"
} {
"client_id": "K-30121",
"sent": true
} Your signed-in Kahunas profile, AES-256-GCM encrypted, in Finland. No password.
The 5 Kahunas tools, never the session cookie.
What your coach login sees: clients, check-ins, plans, chat.
Payments, labs, wearables data, communities, deletes.
You sign in again yourself, in the same Cloud Browser.
Disable for agents, reset the browser, or change your Kahunas password.
Cotlet never types your password: you sign in yourself, and the agent only uses the session. Our site scores A+ on Qualys SSL Labs, securityheaders.com and Mozilla Observatory (live results).
When Kahunas moves a button or renames a section, we fix the tool and your agent calls it the same way. status.cotlet.dev checks the site, console and API every 3 minutes.
| Action | Undo |
|---|---|
| Add a client | Yes, pause or remove them; the invite stays sent |
| Assign a plan | Yes, swap it |
| Send a message | No, the client has read it |
3 of 5 tools ask first: add_client, assign_workout_plan, send_message. You can turn the wait off per tool once you trust a routine.
{
"name": "list_checkins",
"arguments": {
"date_from": "2026-11-03",
"date_to": "2026-11-09"
}
} curl "https://cotlet.dev/api/v1/kahunas/checkins?date_from=2026-11-03&date_to=2026-11-09" \
-H "Authorization: Bearer $COTLET_API_KEY" {
"checkins": [
{
"client": "Jess Taylor",
"date": "2026-11-08",
"weight_kg": 64.1,
"answers": [
{
"q": "Energy 1-10",
"a": "5"
},
{
"q": "Adherence %",
"a": "70"
}
]
}
]
} A cron job or n8n flow can call the same tools over REST at /api/v1/kahunas with the same key and price, in JSON. Failed calls are free. Each tool row above shows its REST path.
About $11 a monthfor an online coach with about 60 clients, 1,980 credits. Your Kahunas plan stays as it is.
| Job | Calls | Credits |
|---|---|---|
| Weekly check-in review | 1 × 4 | 40 |
| Missed check-in nudges | 7 × 4 | 280 |
| Client onboarded | 2 × 8 | 160 |
| Cloud Browser, 30 days | 1,500 | |
| Total | 1,980 |
Kahunas publishes no usage counts, so the month is our example. Dollars at the $29 pack rate.
| Credits | Price, one time | Calls at 10 credits | Per 1,000 credits |
|---|---|---|---|
| 5,000 | $29 | 500 | $5.80 |
| 15,000 | $79 | 1,500 | $5.27 |
| 32,000 | $149 | 3,200 | $4.66 |
| 60,000 | $249 | 6,000 | $4.15 |
Only successful calls use credits; failed calls and timeouts cost nothing. At a balance of 0 calls pause, never a surprise charge. Authenticate with the Authorization: Bearer header.
| Option | What it does | Where it stops |
|---|---|---|
| Zapier app | Check-ins and packages out, new clients in. | Polling; no plans or messages. |
| Kahunas automations | Automatic messages and tasks inside Kahunas. | Fixed rules; nothing you can ask. |
| By hand | Every check-in in Kahunas, one client at a time. | Your Sunday evening. |
If you only need new sales to create clients, the Zapier app does that. To review, nudge and onboard from ChatGPT or Claude this week, Cotlet works in the Kahunas account you already have.
Take Group sp. z o.o. runs Cotlet. It is a software company registered in Poland, EU (VAT PL6342984273), in business since 2019, led by its founders Bart Krawczyk (Co-founder, CTO) and Jake Slugocki (Co-founder, SEO, sales and marketing). Questions about the Kahunas tools go to contact@cotlet.dev.
Sign up free at https://cotlet.dev, open Kahunas under Integrations in the console and sign in to Kahunas in its Cloud Browser. The trial starts with your first app and asks for no card.
Sign up at cotlet.dev, log in to Kahunas once in its Cloud Browser and add Cotlet to ChatGPT or Claude, following the steps in your console. No API key is needed. ChatGPT and Claude then work in your Kahunas account through Cotlet, in their phone apps too.
With Cotlet, ChatGPT, Claude and other AI agents handle jobs like these in Kahunas: review the week's check-ins; chase missed check-ins; onboard a client. You ask in plain words, and anything that reaches other people waits for your OK first.
No. Kahunas has no ChatGPT or Claude connector of its own and Kahunas has no official MCP server (checked 9 Nov 2026). Cotlet is an independent one that works in ChatGPT, Claude, Cursor and any MCP client, on your signed-in account.
Yes, with Cotlet. ChatGPT reads the week's check-ins and sums them up, flagging low adherence or energy.
Yes, with Cotlet. ChatGPT drafts nudges for clients who missed a check-in and sends them in the Kahunas chat after your OK.
Yes, with Cotlet. ChatGPT adds the client to a package and assigns their plan, after your OK.
Only in how it is called. Both carry the same 5 tools, inputs, answers, API key and price. Agents use MCP; scripts and HTTP steps use REST.
No. Cotlet is independent and not affiliated with Kahunas.
Free 7-day trial with 2,000 credits, no card needed.
May we use Google Analytics to see which pages help people? It sets cookies only if you accept. No ads, and we never sell data. Cookie policy