Avantio MCP server for ChatGPT, Claude and any AI agent: list bookings, get booking, read calendar, update rates, send guest message and list tasks in your own Avantio account. Cotlet works in the account through your Cloud Browser, a real Chrome where you sign in to Avantio yourself; Cotlet does not store your password and you need no Avantio API key. About the official Avantio API: Avantio has official APIs, a PMS API, a Web API and an Accounting API, and no official MCP server (checked 31 Oct 2026). The API is closed: documentation comes on request, and Avantio tests each connection with its technical team before it goes live. Setup and FAQ: https://cotlet.dev/integrations/avantio-api-mcp-server
Scored across 32 tools
The 21 cotlet_browser_* primitives are well-differentiated (click vs press, type vs fill_form vs select, read vs find vs screenshot), but the six avantio_* tools all perform the same act—return step-by-step UI instructions—and cotlet_app_guide explicitly duplicates those same six Avantio actions, so an agent cannot easily tell which of two near-identical paths to take. cotlet_browser_open vs navigate vs tabs(new) also overlap at the edges.
Clear, stable prefixes (avantio_*, cotlet_browser_*, cotlet_*) with snake_case verb_noun forms used throughout the action tools (get_booking, update_rates, browser_fill_form, upload_file). Minor deviations only: cotlet_apps and cotlet_whoami/balance are bare nouns without a verb, but they remain predictable and readable.
32 tools exceeds the comfortable range, though the 21 browser primitives each map to a distinct interaction and earn their place. The six avantio_* wrappers are near-identical boilerplate that inflate the count without adding capability, pushing the set over the line.
Browser automation coverage is strong (navigate, click, type, fill, select, drag, scroll, screenshot, evaluate, download, upload, wait, tabs), giving no real dead ends for UI work. However, the Avantio surface is only six read/light-action guides—no create or cancel booking, no property or owner management, no invoices/reporting—so the stated PMS domain is only partially covered.
Get booking in the user's own Avantio account from ChatGPT, Claude or any AI agent. Returns how to do it in Avantio step by step (screens, buttons, fields) and opens nothing by itself; then do it with the cotlet_browser_* tools in the user's Avantio Cloud Browser. Avantio's official API: Avantio has official APIs, a PMS API, a Web API and an Accounting API, and no official MCP server (checked 31 Oct 2026).
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
List bookings in the user's own Avantio account from ChatGPT, Claude or any AI agent. Returns how to do it in Avantio step by step (screens, buttons, fields) and opens nothing by itself; then do it with the cotlet_browser_* tools in the user's Avantio Cloud Browser. Avantio's official API: Avantio has official APIs, a PMS API, a Web API and an Accounting API, and no official MCP server (checked 31 Oct 2026).
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
List tasks in the user's own Avantio account from ChatGPT, Claude or any AI agent. Returns how to do it in Avantio step by step (screens, buttons, fields) and opens nothing by itself; then do it with the cotlet_browser_* tools in the user's Avantio Cloud Browser. Avantio's official API: Avantio has official APIs, a PMS API, a Web API and an Accounting API, and no official MCP server (checked 31 Oct 2026).
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
Read calendar in the user's own Avantio account from ChatGPT, Claude or any AI agent. Returns how to do it in Avantio step by step (screens, buttons, fields) and opens nothing by itself; then do it with the cotlet_browser_* tools in the user's Avantio Cloud Browser. Avantio's official API: Avantio has official APIs, a PMS API, a Web API and an Accounting API, and no official MCP server (checked 31 Oct 2026).
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
Send guest message in the user's own Avantio account from ChatGPT, Claude or any AI agent. Returns how to do it in Avantio step by step (screens, buttons, fields) and opens nothing by itself; then do it with the cotlet_browser_* tools in the user's Avantio Cloud Browser. Avantio's official API: Avantio has official APIs, a PMS API, a Web API and an Accounting API, and no official MCP server (checked 31 Oct 2026).
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
Update rates in the user's own Avantio account from ChatGPT, Claude or any AI agent. Returns how to do it in Avantio step by step (screens, buttons, fields) and opens nothing by itself; then do it with the cotlet_browser_* tools in the user's Avantio Cloud Browser. Avantio's official API: Avantio has official APIs, a PMS API, a Web API and an Accounting API, and no official MCP server (checked 31 Oct 2026).
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
How to work in an app by clicking in the user's Cloud Browser with Cotlet's browser tools: which browser to use for this workspace and the sign-in link, the method step by step, the app's screens, menus and actions, notes, and the app's dedicated tools when Cotlet has them. Call it before the first browser step in an app. Works for any web app; one outside Cotlet's catalog gets the general method. Free, no browser session. For Avantio it covers these actions: List bookings, Get booking, Read calendar, Update rates, Send guest message, List tasks.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | The app's name or Cotlet slug. Default: Avantio. | |
| task | No | What the user wants done in the app, in their words. |
The apps of the user's workspace and whether each works now: the app account in the user's Cloud Browser (connected, signed out, signed in but not connected), and the one step the user has to take, with the console link. Free. Needs the user's Cotlet API key or sign-in.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Only this app, e.g. skool. |
The user's current credit balance. Free. Needs the user's Cotlet API key or sign-in.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
Clicks element element, or point x, y of the screenshot; double double-clicks, button: right right-clicks. Answers the page after it: the elements and text in view, with the same numbers. Says when nothing changed. A link that would open a new tab opens in this one. Buttons that pay or buy, and sign-in and account pages, are refused.
| Name | Required | Description | Default |
|---|---|---|---|
| x | No | Instead of `element`: pixels from the left of the screenshot. | |
| y | No | With `x`: pixels from the top of the screenshot. | |
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| button | No | right opens the page's own context menu. Default: left. | |
| dialog | No | How to answer a native dialog (confirm, prompt, 'leave this page?') this step opens: accept presses OK, dismiss presses Cancel. Default: OK for an alert, Cancel for every other dialog. | |
| double | No | Double-click. | |
| element | No | The element's number from the last read or step answer. | |
| dialog_text | No | Text for a prompt dialog this step opens; implies accept. |
Ends the browser session when the task is done: the browser keeps its cookies and sleeps, and the per-minute charge stops. Answers the session's minutes and credits.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. |
Gets the file that clicking element (a download link or button) or opening url starts: answers its name, type, size and a link valid 15 minutes; CSV, JSON and other text files also as text.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| url | No | A public http or https address, e.g. https://example.com. | |
| element | No | The element's number from the last read or step answer. |
Drags from one element or point to another: a card between columns, a piece on a board, a slider's handle. Answers the page after it: the elements and text in view, with the same numbers.
| Name | Required | Description | Default |
|---|---|---|---|
| to | Yes | An element number, or x and y of the screenshot. | |
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| from | Yes | An element number, or x and y of the screenshot. | |
| dialog | No | How to answer a native dialog (confirm, prompt, 'leave this page?') this step opens: accept presses OK, dismiss presses Cancel. Default: OK for an alert, Cancel for every other dialog. | |
| dialog_text | No | Text for a prompt dialog this step opens; implies accept. |
Runs a JavaScript function body on the page and answers what it returns, as JSON. Use it to extract data the page holds (a table, a list, attributes); act with the other tools. It cannot send requests, click, submit, or read cookies or storage; a filled field's value reads [hidden by Cotlet]. Example: return [...document.querySelectorAll('h2')].map(h => h.innerText)
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| script | Yes | A function body that returns. |
Fills several fields in one step: text fields take text, drop-downs an option's label, checkboxes, radios and switches true or false. Stops at the first field that fails and names those filled. Does not send the form: click its button after. Answers the page after it: the elements and text in view, with the same numbers.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| dialog | No | How to answer a native dialog (confirm, prompt, 'leave this page?') this step opens: accept presses OK, dismiss presses Cancel. Default: OK for an alert, Cancel for every other dialog. | |
| fields | Yes | The fields in the order a person fills them. | |
| dialog_text | No | Text for a prompt dialog this step opens; implies accept. |
Finds text on the whole current page, frames included: the elements whose label holds it, with their numbers, and each line of text that holds it. Use it instead of reading or scrolling a long page for one thing.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| kind | No | Only elements of this kind. Default: any. | |
| text | Yes | Words to look for, any case. |
Rests the pointer on an element or a point, to open a hover menu, a tooltip or a preview. Answers the page after it: the elements and text in view, with the same numbers.
| Name | Required | Description | Default |
|---|---|---|---|
| x | No | Instead of `element`: pixels from the left of the screenshot. | |
| y | No | With `x`: pixels from the top of the screenshot. | |
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| element | No | The element's number from the last read or step answer. |
Starts the user's Cloud Browser (a real Chrome on Cotlet, where the user is signed in to their sites) and opens url. Call it first. The URL goes to the site's open tab, else to a new tab, so the user's own tabs stay. Answers the page after it: the elements and text in view, with the same numbers. In Avantio it serves these actions: List bookings, Get booking, Read calendar, Update rates, Send guest message, List tasks.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| url | No | A public http or https address, e.g. https://example.com. |
Presses a key on the focused element: Enter to send, Tab to the next field, Escape to close a pop-up, arrows in a list or slider, or one character (a site's shortcut). Answers the page after it: the elements and text in view, with the same numbers.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| key | Yes | One of Enter, Tab, Shift+Tab, Escape, Backspace, Delete, Space, ArrowDown, ArrowUp, ArrowLeft, ArrowRight, PageDown, PageUp, Home, End, or one character such as a or 5. | |
| dialog | No | How to answer a native dialog (confirm, prompt, 'leave this page?') this step opens: accept presses OK, dismiss presses Cancel. Default: OK for an alert, Cancel for every other dialog. | |
| repeat | No | Times to press it. Default 1. | |
| dialog_text | No | Text for a prompt dialog this step opens; implies accept. |
The whole current page: its text (up to 20,000 characters) and a numbered list of its links, buttons, fields and other controls, open dialogs first. Use it on a new page or when a step's answer is not enough; element reads only inside one element (a dialog, a form, a list). Never returns field values, cookies or storage.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| element | No | Read only inside this element. |
A JPEG of the visible part of the page. Use it for boards, canvases, maps, charts and layout that the text does not show, then click or drag by x, y of the image.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. |
Scrolls with the mouse wheel: down or up by screens, to top or bottom, until element is in view, or inside a panel or list (inside). Content that loads on scroll appears. Answers the page after it: the elements and text in view, with the same numbers.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| inside | No | Scroll inside this element, not the page. | |
| element | No | Scroll until this element is in view. | |
| screens | No | Viewport heights, for down and up. Default: 0.8. | |
| direction | No | Default: down. |
Chooses option (its label as listed, or its value) in drop-down element. For a home-made drop-down, click it, then click the option. Answers the page after it: the elements and text in view, with the same numbers.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| dialog | No | How to answer a native dialog (confirm, prompt, 'leave this page?') this step opens: accept presses OK, dismiss presses Cancel. Default: OK for an alert, Cancel for every other dialog. | |
| option | Yes | The option. | |
| element | Yes | The element's number from the last read or step answer. | |
| dialog_text | No | Text for a prompt dialog this step opens; implies accept. |
The tabs of the user's web browser, where they keep their signed-in sites open. list (default) answers each tab's id, URL and title and which is shown; switch with tab shows that tab, and every later step acts on it; new with url opens a tab (at most 8); close with tab closes it. Work in the tab of the site the task is about and close only the tabs you opened.
| Name | Required | Description | Default |
|---|---|---|---|
| tab | No | A tab's id from list, for switch and close. | |
| url | No | For new: the public http or https address the tab opens. | |
| action | No | What to do. Default: list. |
Types text into field element, replacing what it held; submit presses Enter after it. For several fields use fill_form. Without element the text goes where the focus is, as a person types after clicking: for spreadsheet cells and editors that read does not number (Google Sheets, Docs), click the place first; there a tab in text presses Tab and a line break Enter, so one call fills a table. Answers the page after it: the elements and text in view, with the same numbers. Password, card and one-time code fields are refused: the user types them.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| text | Yes | The text to type. | |
| dialog | No | How to answer a native dialog (confirm, prompt, 'leave this page?') this step opens: accept presses OK, dismiss presses Cancel. Default: OK for an alert, Cancel for every other dialog. | |
| slowly | No | Key by key, for a search or address field whose suggestions do not appear. | |
| submit | No | Press Enter after typing, e.g. to search. | |
| element | No | The field's number from the last read. Leave it out to type where the focus is. | |
| dialog_text | No | Text for a prompt dialog this step opens; implies accept. |
Puts files into file field or upload button element: each file is {"url": "https://..."} or {"file_id": "..."} of a file uploaded to Cotlet; up to 10 files, 20 MB each. Answers the page after it: the elements and text in view, with the same numbers.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| files | Yes | The files. | |
| element | Yes | The element's number from the last read or step answer. |
Waits until text shows on the page (at most seconds, default 5, up to 20), or just seconds: for results that load slowly. Says whether the text appeared. Answers the page after it: the elements and text in view, with the same numbers.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote. | |
| text | No | Text to wait for. | |
| seconds | No | At most. |
Status of an earlier Cotlet call, by its call_id: pending (waits for the owner's approval in the Cotlet console), approved, running, success, rejected, expired, blocked or failed. For a call that answered with status pending or running.
| Name | Required | Description | Default |
|---|---|---|---|
| call_id | Yes | call_id from the earlier call |
Sends a report to the Cotlet team: a tool that failed or returned wrong data, an error you could not get past, or a step the browser could not do, with the page, the step and what you saw. A missing dedicated tool is not a problem to report: do the task in the browser. A feature the user asks for goes as feature_request. A report promises nothing: tell the user it was sent, never that something will be built or fixed, or when. The report carries the error text and call_id when there is one, never passwords or tokens. Needs the user's Cotlet API key or sign-in.
| Name | Required | Description | Default |
|---|---|---|---|
| app | No | App slug the report is about, e.g. 'skool', or for a site in the web browser its host, e.g. 'app.example.com'. | |
| kind | Yes | bug: a tool did the wrong thing or returned wrong data. error: a call failed or returned an error you could not get past. feature_request: something new the user asked for. missing_feature: a step the task needed that you tried and could not do, in the browser or with a tool. other: anything else. | |
| tool | No | Tool or endpoint name, e.g. 'skool_list_members'. | |
| title | Yes | One line, e.g. 'skool_list_members stops after 50 members'. | |
| client | No | Agent or tool sending this, e.g. 'Claude Code'. | |
| call_id | No | call_id of the call that went wrong, if any. | |
| description | Yes | What the user asked for, what you tried, what you expected and what happened, with the error text if there was one. No passwords, tokens or other secrets. |
Returns a one-time upload_url and a file_id for a local file (an image for a post, an attachment). The file is sent to upload_url with an HTTP PUT; an argument that takes a file accepts {"file_id": "..."}. Up to 25 MB, the URL works once. Free. Needs the user's Cotlet API key or sign-in.
| Name | Required | Description | Default |
|---|---|---|---|
| name | No | File name, e.g. photo.jpg. | |
| content_type | No | MIME type, e.g. image/jpeg. |
The Cotlet account this connection acts as: email, workspace, access status, the API key or OAuth client in use with its scope, the apps the workspace may call and its credit balance. Free. Needs the user's Cotlet API key or sign-in.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
avantio_get_bookingavantio_list_bookingsavantio_list_tasksavantio_read_calendaravantio_send_guest_messageavantio_update_ratescotlet_app_guidecotlet_appscotlet_balancecotlet_browser_clickcotlet_browser_closecotlet_browser_downloadcotlet_browser_dragcotlet_browser_evaluatecotlet_browser_fill_formcotlet_browser_findcotlet_browser_hovercotlet_browser_navigatecotlet_browser_opencotlet_browser_presscotlet_browser_readcotlet_browser_screenshotcotlet_browser_scrollcotlet_browser_selectcotlet_browser_tabscotlet_browser_typecotlet_browser_uploadcotlet_browser_waitcotlet_get_callcotlet_report_issuecotlet_upload_filecotlet_whoamiHostfully MCP server for ChatGPT, Claude and any AI agent: list reservations, get reservation, accept booking request, send guest message, read Central Calendar and list properties in your own Hostfully account. Cotlet works in the account through your Cloud Browser, a real Chrome where you sign in to Hostfully yourself; Cotlet does not store your password and you need no Hostfully API key. About the official Hostfully API: Hostfully has an official REST API, the Open API v3, and no official MCP server (checked 31 Oct 2026). It is a paid add-on: you email api@hostfully.com with your use case, test in a sandbox, and only then get production access. Setup and FAQ: https://cotlet.dev/integrations/hostfully-api-mcp-server
Little Hotelier MCP server for ChatGPT, Claude and any AI agent: list bookings, update rates, update availability, create booking, message guest and get occupancy report in your own Little Hotelier account. Cotlet works in the account through your Cloud Browser, a real Chrome where you sign in to Little Hotelier yourself; Cotlet does not store your password and you need no Little Hotelier API key. About the official Little Hotelier API: Little Hotelier has no API for its own customers (checked 11 Oct 2026). SiteMinder APIs need a partnership agreement with SiteMinder's Ecosystem team and are listed for PMS, channel, app and booking-engine vendors, so a property cannot get a key to read its reservations or change rates from a script. Setup and FAQ: https://cotlet.dev/integrations/little-hotelier-api-mcp-server
SiteMinder MCP server for ChatGPT, Claude and any AI agent: update rates, close dates, list reservations, update inventory and get channel performance in your own SiteMinder account. Cotlet works in the account through your Cloud Browser, a real Chrome where you sign in to SiteMinder yourself; Cotlet does not store your password and you need no SiteMinder API key. About the official SiteMinder API: SiteMinder has APIs, but the ones that change rates, availability and restrictions or deliver reservations are for technology partners who sign a partnership agreement and certify each API (checked 11 Oct 2026). A hotel can generate its own key only for the read-only Direct Booking API. Setup and FAQ: https://cotlet.dev/integrations/siteminder-api-mcp-server
Rent Manager MCP server for ChatGPT, Claude and any AI agent: post charge, create work order, message tenant and list tenants in your own Rent Manager account. Cotlet works in the account through your Cloud Browser, a real Chrome where you sign in to Rent Manager yourself; Cotlet does not store your password and you need no Rent Manager API key. About the official Rent Manager API: Rent Manager has an API that reads and writes your database, but it is not self-serve (checked 11 Oct 2026). Its public pages offer no key signup: access goes through the Integrations Partner Program or an API support request, and a developer then builds the connector. Setup and FAQ: https://cotlet.dev/integrations/rent-manager-api-mcp-server
Add one secure layer between your agents and this server.
