# Partiful by Cotlet (remote · cotlet.dev)

Invites, guest lists and text blasts for your events.

- Trust score: 69/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-24

## Components

- remote · `cotlet.dev`: 69/100 (this document), [markdown](https://verifymcp.io/servers/dev-cotlet-partiful/mcp-v1-partiful.md), [page](https://verifymcp.io/servers/dev-cotlet-partiful/mcp-v1-partiful)
- remote · `cotlet.dev`: 40/100, [markdown](https://verifymcp.io/servers/dev-cotlet-partiful/mcp-v1-partiful-connect.md), [page](https://verifymcp.io/servers/dev-cotlet-partiful/mcp-v1-partiful-connect)
- pypi · `partiful-api-mcp`: 64/100, [markdown](https://verifymcp.io/servers/dev-cotlet-partiful/partiful-api-mcp.md), [page](https://verifymcp.io/servers/dev-cotlet-partiful/partiful-api-mcp)

## Channel facts

- Endpoint: `https://cotlet.dev/mcp/v1/partiful`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.2`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-24.

- **Endpoint Security**: 66/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation check failed: no authorisation is required to call this server, and it exposes a tool marked destructive (cotlet_browser_click).
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC is configured correctly; the domain's records validate against the full chain to the root.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 80/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 4844 tokens (~151/item across 32 items; 31 tools + 1 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability check failed: schema churn in the 1 day we've observed: 3 tool removals, 0 breaking changes, 0 auth/transport breaks, 0 additions.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - All 2 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.
  - An AI judge read all 33 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the Partiful by Cotlet MCP server?

Partiful by Cotlet is a hosted endpoint at https://cotlet.dev/mcp/v1/partiful, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http dev-cotlet-partiful 'https://cotlet.dev/mcp/v1/partiful'
```

### Cursor

```json
{
  "mcpServers": {
    "dev-cotlet-partiful": {
      "url": "https://cotlet.dev/mcp/v1/partiful"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "dev-cotlet-partiful": {
      "type": "http",
      "url": "https://cotlet.dev/mcp/v1/partiful"
    }
  }
}
```

### Codex

```toml
[mcp_servers.dev-cotlet-partiful]
url = "https://cotlet.dev/mcp/v1/partiful"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "dev-cotlet-partiful": {
      "type": "remote",
      "url": "https://cotlet.dev/mcp/v1/partiful",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add dev-cotlet-partiful --url 'https://cotlet.dev/mcp/v1/partiful' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  dev-cotlet-partiful:
    url: "https://cotlet.dev/mcp/v1/partiful"
```

### Netclaw

```json
{
  "McpServers": {
    "dev-cotlet-partiful": {
      "Transport": "http",
      "Url": "https://cotlet.dev/mcp/v1/partiful"
    }
  }
}
```

### Vellum

```bash
assistant mcp add dev-cotlet-partiful -t streamable-http -u 'https://cotlet.dev/mcp/v1/partiful'
```

### Other

```json
{
  "mcpServers": {
    "dev-cotlet-partiful": {
      "type": "http",
      "url": "https://cotlet.dev/mcp/v1/partiful"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-24 (score 69, 0)

- [security regression] Stability: unverified → fail
- [security regression] A breaking change shipped without a version bump: still 0.1.0
- [security regression] Tool “cotlet_balance” was removed
- [security regression] Tool “cotlet_browser_connect” was removed
- [security regression] Tool “cotlet_browser_sessions” was removed
- [security] The server rewrote its instructions, which are the text every model session reads
- [security] Tool “approve_guests” rewrote its description, which is the text the model reads
- [security] Tool “cancel_event” rewrote its description, which is the text the model reads
- [security] Tool “check_in_guests” rewrote its description, which is the text the model reads
- [security] Tool “cotlet_browser_click” rewrote its description, which is the text the model reads
- [security] Tool “cotlet_browser_close” rewrote its description, which is the text the model reads
- [security] Tool “cotlet_browser_navigate” rewrote its description, which is the text the model reads
- [security] Tool “cotlet_browser_open” rewrote its description, which is the text the model reads
- [security] Tool “cotlet_browser_press” rewrote its description, which is the text the model reads
- [security] Tool “cotlet_browser_read” rewrote its description, which is the text the model reads
- [security] Tool “cotlet_browser_screenshot” rewrote its description, which is the text the model reads
- [security] Tool “cotlet_browser_scroll” rewrote its description, which is the text the model reads
- [security] Tool “cotlet_browser_select” rewrote its description, which is the text the model reads
- [security] Tool “cotlet_browser_type” rewrote its description, which is the text the model reads
- [security] Tool “cotlet_browser_upload” rewrote its description, which is the text the model reads
- [security] Tool “delete_event” rewrote its description, which is the text the model reads
- [security] Tool “duplicate_event” rewrote its description, which is the text the model reads
- [security] Tool “export_guest_list” rewrote its description, which is the text the model reads
- [security] Tool “get_event” rewrote its description, which is the text the model reads
- [security] Tool “invite_guests” rewrote its description, which is the text the model reads
- [security] Tool “list_events” rewrote its description, which is the text the model reads
- [security] Tool “list_guests” rewrote its description, which is the text the model reads
- [security] Tool “list_past_guests” rewrote its description, which is the text the model reads
- [security] Tool “send_text_blast” rewrote its description, which is the text the model reads
- [security] Tool “update_event” rewrote its description, which is the text the model reads
- [security] Tool “create_event” rewrote its description, which is the text the model reads
- [functional regression] Schema quality: 110 → 151
- [functional improvement] Stability: unverified → 0.03

### 2026-10-23 (score 69)

First indexed and scored.

## MCP tools (31)

### `cotlet_whoami` (~63 tokens)

Cotlet: who am I

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.

### `cotlet_apps` (~89 tokens)

Cotlet: apps I can use

The apps of the user's workspace and whether each works now: access granted or requested, the app account in the user's Cloud Browser (connected, signed out, not enabled for agents), and the one step the user has to take, with the console link. Free. Needs the user's Cotlet API key or sign-in.

Input parameters:

- `app` (string): Only this app, e.g. skool.

### `cotlet_request_apps` (~102 tokens)

Cotlet: request access to apps

Requests access to apps for the user's workspace, as Request access in the console: a live app is granted at once, any other goes to the Cotlet team, who answer within 72 hours. Takes app slugs as listed at https://cotlet.dev/api/v1/apps. Free. Needs the user's Cotlet API key or sign-in.

Input parameters:

- `apps` (array, required): App slugs, e.g. ["skool", "substack"].

### `cotlet_get_call` (~76 tokens)

Cotlet: check a call

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.

Input parameters:

- `call_id` (string, required): call_id from the earlier call

### `cotlet_upload_file` (~115 tokens)

Cotlet: upload a file for a tool

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.

Input parameters:

- `content_type` (string): MIME type, e.g. image/jpeg.
- `name` (string): File name, e.g. photo.jpg.

### `cotlet_report_issue` (~276 tokens)

Cotlet: report a bug or a missing feature

Sends a report straight to the Cotlet team: a tool that failed or returned wrong data, an error you could not get past, or a tool, field or app the task needed and Cotlet lacks. 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.

Input parameters:

- `app`: App slug the report is about, e.g. 'skool'.
- `call_id`: call_id of the call that went wrong, if any.
- `client`: Agent or tool sending this, e.g. 'Claude Code'.
- `description` (string, required): What you tried, what you expected and what happened, with the error text if there was one. No passwords, tokens or other secrets.
- `kind` (string, required): 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 wants. missing_feature: an app is her…
- `title` (string, required): One line, e.g. 'skool_list_members stops after 50 members'.
- `tool`: Tool or endpoint name, e.g. 'skool_list_members'.

### `cotlet_browser_open` (~128 tokens)

Open the browser

Wakes the user's Partiful Cloud Browser, a real Chrome hosted on Cotlet and signed in to Partiful as the user. Use it for what the Partiful tools do not cover. Opens `url` when given and returns the page's URL and title. The user watches every step live. Every started minute of the session costs credits; it ends when closed or 3 minutes after the last call in the browser.

Input parameters:

- `url` (string): A public http or https address, e.g. https://example.com. In an app's browser, a page of that app.

### `cotlet_browser_navigate` (~99 tokens)

Go to a page

Opens a public http or https address in the user's Partiful Cloud Browser and returns the URL and title it ended on. Only Partiful pages open. Every started minute of the session costs credits; it ends when closed or 3 minutes after the last call in the browser.

Input parameters:

- `url` (string, required): A public http or https address, e.g. https://example.com. In an app's browser, a page of that app.

### `cotlet_browser_read` (~98 tokens)

Read the page

Returns the current page of the user's Partiful Cloud Browser: its readable text, up to 20,000 characters, and a numbered list of its links, buttons and fields. Field values, cookies and storage are never returned. On a page longer than that, both start near where it is scrolled to. Every started minute of the session costs credits; it ends when closed or 3 minutes after the last call in the browser.

### `cotlet_browser_screenshot` (~76 tokens)

See the page

Returns a JPEG image of the visible part of the current page in the user's Partiful Cloud Browser, with its URL and title: boards, canvases and layouts that the page text does not show. Every started minute of the session costs credits; it ends when closed or 3 minutes after the last call in the browser.

### `cotlet_browser_scroll` (~176 tokens)

Scroll the page

Scrolls the current page in the user's Partiful Cloud Browser with the mouse wheel, as a person does: down or up by `screens` viewport heights (default 0.8), to the top or the bottom, or until element `element` is in view. Content that loads on scroll appears, and the next read lists it. Returns the URL, title and scroll position (at_top, at_bottom). Every started minute of the session costs credits; it ends when closed or 3 minutes after the last call in the browser.

Input parameters:

- `direction` (string): Where to scroll. Default: down.
- `element` (integer): Scroll until this element of the element list is in view.
- `screens` (number): How far, in viewport heights, for down and up. Default: 0.8.

### `cotlet_browser_click` (~120 tokens)

Click on the page

Clicks a link, button or other element of the current page in the user's Partiful Cloud Browser, by its number in the page's element list, and returns the URL and title after the click. It acts as the user on that site. Buttons that pay or buy and buttons on account or sign-in pages are refused. Every started minute of the session costs credits; it ends when closed or 3 minutes after the last call in the browser.

Input parameters:

- `element` (integer, required): The element's number in the element list of the current page.

### `cotlet_browser_type` (~149 tokens)

Type on the page

Types text into a field of the current page in the user's Partiful Cloud Browser, by the field's number in the page's element list, and with `submit` presses Enter. Returns the URL and title after it. Password, card and one-time code fields and sign-in pages are refused: the user fills those in themselves. Every started minute of the session costs credits; it ends when closed or 3 minutes after the last call in the browser.

Input parameters:

- `element` (integer, required): The element's number in the element list of the current page.
- `submit` (boolean): Press Enter after typing, e.g. to search.
- `text` (string, required): The text to type.

### `cotlet_browser_select` (~123 tokens)

Choose from a list

Chooses an option of a drop-down list on the current page in the user's Partiful Cloud Browser, by the list's number in the element list and the option's label as read lists it (or its value). Returns the URL and title after it. Card fields and account pages are refused. Every started minute of the session costs credits; it ends when closed or 3 minutes after the last call in the browser.

Input parameters:

- `element` (integer, required): The element's number in the element list of the current page.
- `option` (string, required): The option.

### `cotlet_browser_press` (~109 tokens)

Press a key

Presses one key on the current page in the user's Partiful Cloud Browser, on the element that has focus: Tab to the next field, Enter to send, Escape to close a dialog or pop-up, arrows to move through a suggestion list. Returns the URL and title after it. Enter on account pages is refused. Every started minute of the session costs credits; it ends when closed or 3 minutes after the last call in the browser.

Input parameters:

- `key` (string, required): The key.

### `cotlet_browser_upload` (~152 tokens)

Upload a file

Puts files into a file field of the current page in the user's Partiful Cloud Browser, or into the file picker that an upload button opens, by its number in the element list. A file is given as {"url": "https://..."} for a file online or {"file_id": "..."} for one uploaded to Cotlet first; up to 10 files, 20 MB each. Returns the URL and title after it. Every started minute of the session costs credits; it ends when closed or 3 minutes after the last call in the browser.

Input parameters:

- `element` (integer, required): The element's number in the element list of the current page.
- `files` (array, required): The files.

### `cotlet_browser_close` (~45 tokens)

Close the browser

Ends the session in the user's Partiful Cloud Browser: the browser keeps its cookies, goes to sleep and the per-minute charge stops. Returns the session's minutes and credits.

### `export_guest_list` (~177 tokens)

Export guest list

The guest list as CSV, the same file as the Export CSV button. Returns the file the host's Export CSV button downloads, for the chosen RSVP statuses. Columns are Partiful's: Name, Status, Checked in, Check-in Time, RSVP date, then one column per Guest Questionnaire question. Status is Partiful's label, for example Approved on a Guest Approval event. The file text comes back in csv, not as a link, with rows (guests in the file) and a suggested filename. The file has no guest ids, emails or phone numbers; for guest ids use list_guests. Hosts only.

Input parameters:

- `event_id` (string, required): event_id from list_events.
- `statuses` (array): RSVP statuses to include: going, maybe, cant_go, invited, waitlist, pending. Default: all.

### `get_event` (~99 tokens)

Get event

Full event: title, description, start and end, location, RSVP deadline, guest limit, Guest Approval and waitlist settings, link. Returns one event as its page shows it to the host, with guests per RSVP status and the Guest Questionnaire questions. Times are in the event's time zone. Works for any event the account can open; the write tools need an event it hosts.

Input parameters:

- `event_id` (string, required): event_id from list_events.

### `list_events` (~136 tokens)

List events

Events you host, with date, status and guest counts. Returns the events this account hosts or cohosts, as the Hosting tab of the home page lists them: start and end in the event's time zone, active or canceled, and guests per RSVP status. Events you were only invited to are left out. Upcoming come soonest first, past most recent first. Use event_id in the other tools.

Input parameters:

- `cursor` (string): next_cursor from the previous call.
- `limit` (integer): 1 to 50. Default: 20.
- `when` (string): upcoming, past or all. Default: upcoming.

### `list_guests` (~182 tokens)

List guests

Guests of an event with RSVP status, check-in and Guest Questionnaire answers. Returns the guest list the host sees, oldest RSVP first: name, RSVP status, party size with plus-one names, check-in, RSVP note and questionnaire answers. Hosts only. going includes guests approved on a Guest Approval event. guest_id goes to approve_guests and check_in_guests; total counts the guests that match the filters.

Input parameters:

- `checked_in` (boolean): Only guests who are checked in (true) or not (false).
- `cursor` (string): next_cursor from the previous call.
- `event_id` (string, required): event_id from list_events.
- `limit` (integer): 1 to 200. Default: 100.
- `status` (string): all, going, maybe, cant_go, invited, waitlist or pending. Default: all.

### `list_past_guests` (~189 tokens)

List past guests

People you can invite: your past guests and mutuals. Returns the people Partiful offers on an event's Invite screen: past guests of your events and mutuals from events you went to, with how many events you shared. Give not_on_event_id to leave out people already on that event; there is no filter by one past event. query matches part of the name. user_id goes to invite_guests. A new account has nobody yet, and shared_events or last_shared_event stay 0 or null when Partiful leaves them out.

Input parameters:

- `cursor` (string): next_cursor from the previous call.
- `limit` (integer): 1 to 200. Default: 50.
- `not_on_event_id` (string): Leave out people already on this event (event_id), as its Invite list does.
- `query` (string): Only names containing this text.

### `approve_guests` (~158 tokens)

Approve guests

Approve pending guests on a Guest Approval event. Moves the given pending guests, or all of them, to Approved, as Approve on the host's guest list does. Partiful tells each approved guest by text or email. Ids that are not pending are refused before the call waits for your approval. Returns how many were approved and how many still wait. Hosts only. By default you confirm each call; you can switch that off for this tool. Waits for the owner's approval.

Input parameters:

- `all` (boolean): Approve everyone who is pending instead. Default: false.
- `event_id` (string, required): event_id from list_events.
- `guest_ids` (array): Pending guest_id values from list_guests (status pending).

### `cancel_event` (~160 tokens)

Cancel event

Cancel an event. Partiful notifies the guests. Cancels the event as Cancel event on its page does: the page stays up marked canceled. By default Partiful texts the guests on the list with your message, so this reaches real people; notify_guests false cancels without telling anyone. An event that is already canceled is refused. It cannot be undone here. Hosts only. By default you confirm each call; you can switch that off for this tool. Waits for the owner's approval.

Input parameters:

- `event_id` (string, required): event_id from list_events.
- `message` (string): Note to guests sent with the cancellation.
- `notify_guests` (boolean): Let Partiful tell the guests that the event is canceled. Default: true.

### `check_in_guests` (~124 tokens)

Check in guests

Mark guests as checked in at the door, or undo it. Checks the given guests in, as the host's check-in list does, or takes the check-in back with undo. Guests get no message. Ids that are not on the guest list are refused. Returns how many guests changed and how many are checked in now. Hosts only.

Input parameters:

- `event_id` (string, required): event_id from list_events.
- `guest_ids` (array, required): guest_id values from list_guests.
- `undo` (boolean): Remove the check-in instead. Default: false.

### `create_event` (~344 tokens)

Create event

New event page. Nobody is invited until you call invite_guests. Creates and publishes an event page hosted by this account, as Create on partiful.com does, with Partiful's default theme. It is private (only people with the link) unless visibility is public. Nobody is invited or texted; share url or call invite_guests. Times without an offset are read in timezone. Guest Approval and a guest limit exclude each other, so a call with both is refused. Returns the new event.

Input parameters:

- `description` (string): Event details shown on the page.
- `end_at` (string): End, ISO 8601. Optional; must be after start_at.
- `guest_approval` (boolean): Guests ask to join and you approve them (Guest Approval). Clears max_guests.
- `location` (string): Address, place name or link.
- `max_guests` (integer|null): Guest limit; RSVPs over it go to the waitlist. null removes the limit.
- `questions` (array): Guest Questionnaire, short-answer questions asked at RSVP. An empty list turns it off.
- `rsvp_deadline` (string): Last moment guests can RSVP, ISO 8601.
- `start_at` (string, required): Start, ISO 8601. Without an offset it is read in the event's time zone.
- `timezone` (string): IANA zone the event is shown in, e.g. America/New_York. Default: the browser's zone.
- `title` (string, required): Event title.
- `visibility` (string): private: only people with the link (default). public: anyone on or off Partiful.

### `delete_event` (~112 tokens)

Delete event

Delete an event you host for everyone, with its guest list. Deletes the event as Delete event in its settings does: the page, guest list, photos and messages are gone for everyone and cannot be restored. Guests who RSVPd may be told by Partiful. To keep the page and tell guests, use cancel_event. Hosts only. By default you confirm each call; you can switch that off for this tool. Waits for the owner's approval.

Input parameters:

- `event_id` (string, required): event_id from list_events.

### `duplicate_event` (~149 tokens)

Duplicate event

Copy an event with its settings to a new date. The copy has no guests yet. Makes a copy as Duplicate on the event page does: title, description, location, theme, questionnaire and RSVP settings, no guests and no messages. The copy starts at start_at and keeps the original's length; Partiful does not copy the RSVP deadline. Nobody is invited. Returns the new event. Hosts only.

Input parameters:

- `event_id` (string, required): event_id from list_events.
- `start_at` (string, required): Start of the copy, ISO 8601. Without an offset it is read in the event's time zone.
- `title` (string): Title of the copy. Default: the same.

### `invite_guests` (~228 tokens)

Invite guests

Invite past guests and mutuals through Partiful, or anyone by email. Sends invites as the host's Invite screen does, so they reach real people: Partiful users from list_past_guests get Partiful's invite, people in emails get an email with the event link and your note. There is no way to invite a phone number: Partiful takes phone contacts only in its app. Email invitees still sign in with a phone number to RSVP. Partiful allows 1,000 invites per event, 500 of them by email. A canceled event is refused. invited_total is the event's Invited count after the call. Hosts only. By default you confirm each call; you can switch that off for this tool. Waits for the owner's approval.

Input parameters:

- `emails` (array): People to invite by email, with the name the invite greets.
- `event_id` (string, required): event_id from list_events.
- `message` (string): Personal note sent with the invites.
- `user_ids` (array): user_id values from list_past_guests.

### `send_text_blast` (~258 tokens)

Send Text Blast

Text a message to guests by RSVP status. Partiful allows up to 10 Text Blasts per event. Sends a Text Blast as the host's Send Text Blast does: by text and email to every guest with the chosen RSVP statuses, push for guests with the app, and shown in the event's feed unless show_on_event_page is false. Real people get it at once and it cannot be taken back. Up to 480 characters. recipients and by_status count the guests with those statuses at the moment of sending; a choice that reaches nobody is refused before you confirm. Partiful allows 10 blasts per event and refuses a blast to Invited when that group holds more than 100 guests. The answer does not say how many blasts are left. Hosts only. By default you confirm each call; you can switch that off for this tool. Waits for the owner's approval.

Input parameters:

- `event_id` (string, required): event_id from list_events.
- `message` (string, required): Message text.
- `show_on_event_page` (boolean): Also show the blast in the event's activity feed. Default: true.
- `statuses` (array, required): Who receives it: going, maybe, cant_go, invited, waitlist, pending.

### `update_event` (~346 tokens)

Update event

Change the details or settings of an event you host. Changes only the fields you give, as the event's Edit page and settings panel do: title, times, time zone, location, description, RSVP deadline, guest limit, Guest Approval and the Guest Questionnaire. Fields left out keep their value; a call with no field is refused. Turning Guest Approval on removes the guest limit and the waitlist, and the first guest limit turns the waitlist on. New questions replace the questionnaire for guests who RSVP from then on. Returns the event after the change, with updated listing the fields you gave. Hosts only.

Input parameters:

- `description` (string): Event details shown on the page.
- `end_at` (string): End, ISO 8601. Optional; must be after start_at.
- `event_id` (string, required): event_id from list_events.
- `guest_approval` (boolean): Guests ask to join and you approve them (Guest Approval). Clears max_guests.
- `location` (string): Address, place name or link.
- `max_guests` (integer|null): Guest limit; RSVPs over it go to the waitlist. null removes the limit.
- `questions` (array): Guest Questionnaire, short-answer questions asked at RSVP. An empty list turns it off.
- `rsvp_deadline` (string): Last moment guests can RSVP, ISO 8601.
- `start_at` (string): Start, ISO 8601. Without an offset it is read in the event's time zone.
- `timezone` (string): IANA zone the event is shown in, e.g. America/New_York.
- `title` (string): Event title.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/dev-cotlet-partiful/mcp-v1-partiful#diagnostics

## Score history

- 2026-10-24: 69
- 2026-10-23: 69

## Common questions

### What is the Partiful by Cotlet MCP server?

Partiful by Cotlet is an MCP server listed in the public MCP registry as dev.cotlet/partiful. Invites, guest lists and text blasts for your events. This page covers its hosted endpoint (https://cotlet.dev/mcp/v1/partiful).

### Is the Partiful by Cotlet MCP server safe to use?

Partiful by Cotlet scores 69 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Partiful by Cotlet MCP server expose?

Partiful by Cotlet exposes 31 tools: cotlet_whoami, cotlet_apps, cotlet_request_apps, cotlet_get_call, cotlet_upload_file, and 26 more. Their descriptions and schemas cost roughly 4,658 tokens of context every time the server is loaded.

### Does the Partiful by Cotlet MCP server require authentication?

No. We connected to Partiful by Cotlet without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Partiful by Cotlet MCP server still maintained?

Partiful by Cotlet is still listed as active in the MCP registry. We last reached this channel on 24 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://cotlet.dev/mcp/v1/partiful
- Authorisation metadata: https://cotlet.dev/.well-known/oauth-protected-resource/mcp/v1/partiful
- Repository: https://github.com/cotletdev/partiful-api-mcp-server
- Website: https://cotlet.dev/integrations/partiful-api-mcp-server
- Changelog RSS feed: https://verifymcp.io/servers/dev-cotlet-partiful/mcp-v1-partiful.xml
- Changelog JSON feed: https://verifymcp.io/servers/dev-cotlet-partiful/mcp-v1-partiful.json
- HTML version of this page: https://verifymcp.io/servers/dev-cotlet-partiful/mcp-v1-partiful