Cotlet
REMOTE · COTLET.DEV · 2 COMPONENTS
Cotlet's own tools: a cloud browser signed in as the user, account, credits and calls.
Available components
Last scanned (2 hours ago)
Scores higher than 55% of remote servers
Reachable. Last reached 24 Oct 2026.
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. How we score → Why this is hard to score →
Endpoint Security66
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation check failed: no authorisation is required to call this server, and it exposes a tool marked destructive (cotlet_browser_sessions). See how to fix → View diagnostics → Fail
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC is configured correctly; the domain's records validate against the full chain to the root. View diagnostics → Pass
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability67
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 3122 tokens (~156/item across 20 items; 20 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 20 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 21 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
Unverified: 1 category
A category scored 0 because we could not verify it: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 24 Oct 26 66
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 24 Oct 2026 · Probed https://cotlet.dev/mcp/v1/cotlet
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=cotlet.dev | CN=YE1,O=Let's Encrypt,C=US | 12 Oct 2026 | 10 Jan 2027 | ECDSA 256 | ECDSA-SHA384 | 6afd7585ee8e24a40f5683c10835ec990a8 |
| SANs: *.cotlet.dev, cotlet.dev | ||||||
| CN=YE1,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 5ddd70dd31f801c85c186a7a04b80afe |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC secure
Validation of cotlet.dev. — Secure
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| dev. | present | 60074 | 8 | Verified |
| cotlet.dev. | present | 2371 | 13 | Verified |
| cotlet.dev. | Verified address RRset verified with the apex keys |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000; includeSubDomains |
| x-content-type-options | nosniff |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://cotlet.dev/mcp/v1/cotlet | Verified | 200 | |
| http (plaintext) | http://cotlet.dev/mcp/v1/cotlet | HTTPS enforced | 301 | https://cotlet.dev/mcp/v1/cotlet |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
cotlet_apps Cotlet: apps I can use ~89
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.
| Name | Type | Req | Description |
|---|---|---|---|
| app | string | – | Only this app, e.g. skool. |
No output schema declared.
No examples provided.
cotlet_balance Cotlet: credit balance ~28
The user's current credit balance. Free. Needs the user's Cotlet API key or sign-in.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
cotlet_browser_click Click on the page ~176
Clicks a link, button or other element of the current page in the user's browser on Cotlet, 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 that browser.
| Name | Type | Req | Description |
|---|---|---|---|
| app | string | – | Slug of an app the user enabled for agents, e.g. milanote: the step runs in that app's Cloud Browser, signed in as the user and kept to the app's site. Leave it out for the user's web browser. |
| element | integer | yes | The element's number in the element list of the current page. |
No output schema declared.
No examples provided.
cotlet_browser_close Close the browser ~110
Ends the session in the user's browser on Cotlet (with `app`, that app's browser): the browser keeps its cookies, goes to sleep and the per-minute charge stops. Returns the session's minutes and credits.
| Name | Type | Req | Description |
|---|---|---|---|
| app | string | – | Slug of an app the user enabled for agents, e.g. milanote: the step runs in that app's Cloud Browser, signed in as the user and kept to the app's site. Leave it out for the user's web browser. |
No output schema declared.
No examples provided.
cotlet_browser_connect Cotlet: drive the user's Cloud Browser ~135
Wakes the user's Cloud Browser of one app (a real Chrome on Cotlet, signed in to that app as the user) and returns cdp_url, a Chrome DevTools Protocol WebSocket that gives a CDP client full control of the browser. It works in one open tab, the app's: the user watches it live, and new tabs are refused. Every started minute of an open connection costs credits. Needs the user's Cotlet API key or sign-in.
| Name | Type | Req | Description |
|---|---|---|---|
| app | string | yes | Slug of the app whose browser to open, as in the Cotlet tool names, e.g. skool. |
No output schema declared.
No examples provided.
cotlet_browser_navigate Go to a page ~160
Opens a public http or https address in the user's browser on Cotlet and returns the URL and title it ended on. An app's browser opens only that app's pages. Every started minute of the session costs credits; it ends when closed or 3 minutes after the last call in that browser.
| Name | Type | Req | Description |
|---|---|---|---|
| app | string | – | Slug of an app the user enabled for agents, e.g. milanote: the step runs in that app's Cloud Browser, signed in as the user and kept to the app's site. Leave it out for the user's web browser. |
| url | string | yes | A public http or https address, e.g. https://example.com. In an app's browser, a page of that app. |
No output schema declared.
No examples provided.
cotlet_browser_open Open the browser ~191
Wakes the user's own browser on Cotlet, a real Chrome hosted for them: their web browser with the sites they signed in to there, or with `app` that app's browser, signed in to the app. 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 that browser.
| Name | Type | Req | Description |
|---|---|---|---|
| app | string | – | Slug of an app the user enabled for agents, e.g. milanote: the step runs in that app's Cloud Browser, signed in as the user and kept to the app's site. Leave it out for the user's web browser. |
| url | string | – | A public http or https address, e.g. https://example.com. In an app's browser, a page of that app. |
No output schema declared.
No examples provided.
cotlet_browser_press Press a key ~165
Presses one key on the current page in the user's browser on Cotlet, 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 that browser.
| Name | Type | Req | Description |
|---|---|---|---|
| app | string | – | Slug of an app the user enabled for agents, e.g. milanote: the step runs in that app's Cloud Browser, signed in as the user and kept to the app's site. Leave it out for the user's web browser. |
| key | string | yes | The key. |
No output schema declared.
No examples provided.
cotlet_browser_read Read the page ~154
Returns the current page of the user's browser on Cotlet: 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 that browser.
| Name | Type | Req | Description |
|---|---|---|---|
| app | string | – | Slug of an app the user enabled for agents, e.g. milanote: the step runs in that app's Cloud Browser, signed in as the user and kept to the app's site. Leave it out for the user's web browser. |
No output schema declared.
No examples provided.
cotlet_browser_screenshot See the page ~132
Returns a JPEG image of the visible part of the current page in the user's browser on Cotlet, 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 that browser.
| Name | Type | Req | Description |
|---|---|---|---|
| app | string | – | Slug of an app the user enabled for agents, e.g. milanote: the step runs in that app's Cloud Browser, signed in as the user and kept to the app's site. Leave it out for the user's web browser. |
No output schema declared.
No examples provided.
cotlet_browser_scroll Scroll the page ~232
Scrolls the current page in the user's browser on Cotlet 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 that browser.
| Name | Type | Req | Description |
|---|---|---|---|
| app | string | – | Slug of an app the user enabled for agents, e.g. milanote: the step runs in that app's Cloud Browser, signed in as the user and kept to the app's site. Leave it out for the user's web browser. |
| 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. |
No output schema declared.
No examples provided.
cotlet_browser_select Choose from a list ~179
Chooses an option of a drop-down list on the current page in the user's browser on Cotlet, 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 that browser.
| Name | Type | Req | Description |
|---|---|---|---|
| app | string | – | Slug of an app the user enabled for agents, e.g. milanote: the step runs in that app's Cloud Browser, signed in as the user and kept to the app's site. Leave it out for the user's web browser. |
| element | integer | yes | The element's number in the element list of the current page. |
| option | string | yes | The option. |
No output schema declared.
No examples provided.
cotlet_browser_sessions Cotlet: browser sessions and closing them ~107
Open Chrome DevTools connections to the user's Cloud Browsers with the minutes and credits each has cost so far, and the cdp_url links still valid. With close: true it ends the open connections and takes back the unused links, of one app or of all. Needs the user's Cotlet API key or sign-in.
| Name | Type | Req | Description |
|---|---|---|---|
| app | string | – | Only this app's browser, e.g. skool. |
| close | boolean | – | End the connections and revoke the links. |
No output schema declared.
No examples provided.
cotlet_browser_type Type on the page ~205
Types text into a field of the current page in the user's browser on Cotlet, 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 that browser.
| Name | Type | Req | Description |
|---|---|---|---|
| app | string | – | Slug of an app the user enabled for agents, e.g. milanote: the step runs in that app's Cloud Browser, signed in as the user and kept to the app's site. Leave it out for the user's web browser. |
| element | integer | yes | The element's number in the element list of the current page. |
| submit | boolean | – | Press Enter after typing, e.g. to search. |
| text | string | yes | The text to type. |
No output schema declared.
No examples provided.
cotlet_browser_upload Upload a file ~208
Puts files into a file field of the current page in the user's browser on Cotlet, 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 that browser.
| Name | Type | Req | Description |
|---|---|---|---|
| app | string | – | Slug of an app the user enabled for agents, e.g. milanote: the step runs in that app's Cloud Browser, signed in as the user and kept to the app's site. Leave it out for the user's web browser. |
| element | integer | yes | The element's number in the element list of the current page. |
| files | array | yes | The files. |
No output schema declared.
No examples provided.
cotlet_get_call Cotlet: check a call ~76
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 | Type | Req | Description |
|---|---|---|---|
| call_id | string | yes | call_id from the earlier call |
No output schema declared.
No examples provided.
cotlet_report_issue Cotlet: report a bug or a missing feature ~276
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | yes | 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 | 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 wants. missing_feature: an app is her… |
| title | string | yes | One line, e.g. 'skool_list_members stops after 50 members'. |
| tool | – | – | Tool or endpoint name, e.g. 'skool_list_members'. |
No output schema declared.
No examples provided.
cotlet_request_apps Cotlet: request access to apps ~102
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.
| Name | Type | Req | Description |
|---|---|---|---|
| apps | array | yes | App slugs, e.g. ["skool", "substack"]. |
No output schema declared.
No examples provided.
cotlet_upload_file Cotlet: upload a file for a tool ~115
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 | Type | Req | Description |
|---|---|---|---|
| content_type | string | – | MIME type, e.g. image/jpeg. |
| name | string | – | File name, e.g. photo.jpg. |
No output schema declared.
No examples provided.
cotlet_whoami Cotlet: who am I ~63
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.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
How do I install the Cotlet MCP server?
Cotlet is a hosted endpoint at https://cotlet.dev/mcp/v1/cotlet, 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.
remote · cotlet.dev
claude mcp add --transport http dev-cotlet-cotlet 'https://cotlet.dev/mcp/v1/cotlet'
What is the Cotlet MCP server?
Cotlet is an MCP server listed in the public MCP registry as dev.cotlet/cotlet. Cotlet's own tools: a cloud browser signed in as the user, account, credits and calls. This page covers its hosted endpoint (https://cotlet.dev/mcp/v1/cotlet).
Is the Cotlet MCP server safe to use?
Cotlet scores 66 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 Cotlet MCP server expose?
Cotlet exposes 20 tools: cotlet_whoami, cotlet_apps, cotlet_request_apps, cotlet_balance, cotlet_get_call, and 15 more. Their descriptions and schemas cost roughly 2,903 tokens of context every time the server is loaded.
Does the Cotlet MCP server require authentication?
No. We connected to Cotlet without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Cotlet MCP server still maintained?
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.