Calven

Name: Calven
Author: calven-ai

by calven-aiversion 1.1.0i★ –iRuns in the cloud

Registry nameai.calven/mcp

Install

Overview

Description from the maker (original English)

Connect AI agents to shared product marketing intelligence in Calven.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Marketing & social media

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://api.calven.ai/mcp

Run this in your terminal

claude mcp add --transport http calven https://api.calven.ai/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "calven": {
      "url": "https://api.calven.ai/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "calven": {
      "type": "http",
      "url": "https://api.calven.ai/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://api.calven.ai/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain calven.ai (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Marketing & social mediai

More stars than 0% of the other 2974 servers in this category
Published to the registry more recently than 57% of the other 2974 servers in this category
Basic checks equal to or better than 100% of the other 2974 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Calven safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.1.0) reached the registry 23 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: MCP YouTube Transcript, Google Analytics MCP, BibiGPT YouTube Video Summarizer

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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Runs in the cloud★ 137MITUpdated 10 days ago

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Calven MCP

Your approved GTM context, in every AI tool: positioning, messaging, ICP, personas, competitive intel and win/loss, with sources.

Connect · Try it · Use cases by team · calven.ai/mcp · 14-day trial, no card

Calven is the AI product marketing platform. Its nine agents keep one GTM source of truth on your market, buyers, positioning and messaging. Calven MCP puts it inside Claude, ChatGPT, Codex, Cursor, Copilot and other MCP clients that sign in with OAuth (see client support), so sales, marketing, product and leadership work from the same answers your team approved. The plugin adds workflows for battlecards, deal prep, quality reviews, on-message drafts, customer evidence, ICP checks, market research, product intelligence, and live win/loss and ICP pipeline dashboards.

Connect

Paste this URL where your client asks for an MCP server, choose OAuth if asked, and sign in to Calven:

https://api.calven.ai/mcp

You need a Calven workspace (14-day trial, no card). Using another client? See client support.

Claude (claude.ai, desktop)

Customize → Connectors → Add custom connector, paste the URL (name it Calven if asked), Add, then Connect and sign in to Calven. If the dialog asks how Claude identifies itself, choose Use Claude's published identity; automatic (dynamic) registration does not work with Calven. In a chat, turn Calven on under + → Connectors.

On Team and Enterprise plans, an Owner adds the connector once: Organization settings → Connectors → Add → Custom → Web, paste the URL, Add. Each member then opens Customize → Connectors, finds Calven with the Custom label, and clicks Connect.

ChatGPT

Open Plugins in ChatGPT (chatgpt.com/plugins), select the plus button, then Add custom MCP server. Name it Calven, enter the URL as the Server URL, choose OAuth, accept the risk warning and select Create as a plugin. Install Calven from your personal plugins, then type @ in a chat and select it. Your plan and workspace settings decide whether you can add custom MCP servers; see OpenAI's Add custom MCP server guide.

Cursor

Or add this to ~/.cursor/mcp.json:

{ "mcpServers": { "calven": { "url": "https://api.calven.ai/mcp" } } }

VS Code and GitHub Copilot

Or command palette → MCP: Add Server → HTTP, paste the URL, name it calven.

Claude Code and Codex

claude mcp add --transport http calven https://api.calven.ai/mcp

claude mcp login calven

codex mcp add calven --url https://api.calven.ai/mcp codex mcp login calven

Inside a Claude Code session, you can instead run /mcp, select calven and follow the browser sign-in.

Try it

Sales: walk into every deal knowing how you win it.

Why did we lose our last three deals to Acme? Quote the buyers, then give me the first question to ask on my next call against them.

Marketing: campaigns in the buyer's words.

Draft three ad headlines for Heads of Data in our customers' own words, then tell me which one our personas would pick.

BDRs: outreach tested on the buyer before it's sent.

Would our buyer persona reply to this email? If not, rewrite it in our customers' words. [paste email]

Product: build what wins deals.

Which product gaps cost us deals this year? Rank them by deals lost and quote the buyers.

Leadership: win rate you can trust.

What is our win rate by competitor this year versus last, and why do we win and lose? Cite n.

Anyone: no unsupported claims.

Check every product, pricing and competitor claim in this draft against our approved product brief and battlecards. [paste draft]

190 use cases for 19 teams, each with ready-to-paste prompts, in use-cases/.

What it reads, and what it won't do

Your assistant reads, with sources: positioning, messaging, ICP and product brief; competitor dossiers and battlecards; personas; calls, customer quotes and win/loss; market trends; Insights dashboards; and CRM accounts and deals where your workspace allows it.

Results carry their sources. An empty result says nothing is recorded. Calven does no web search, and its server instructions tell the model not to fill gaps from its own knowledge.
Thirteen read tools and one review action, listed in the tool catalog, plus four server prompts. The action, review_against_personas, starts a review task in Calven and returns findings. No tool edits your workspace content, and nothing is published or sent.
Your permissions. Each user signs in as themselves and sees only what their Calven role allows. Admins decide whether transcripts and pipeline are readable over MCP. Removing a user removes their MCP access.

[!IMPORTANT]

Answers contain your company's confidential data. Use an AI client and model provider your organization has approved. See data handling.

Data is stored in the EU, a DPA with EU SCCs covers every plan, and the SOC 2 Type I audit is in progress. Details on the Trust Center.

The plugin

The Calven plugin bundles the server connection with thirteen workflow skills and a research subagent. Install it in Claude Code:

claude plugin marketplace add calven-ai/calven-mcp

claude plugin install calven@calven

Then run /calven:start to check the connection and get three first prompts built from your workspace.

Type	Name	What you get
Skill	`/calven:battlecard`	Where you win and lose against a named competitor: objections, proof and a talk track
Skill	`/calven:deal-prep`	A one-page call brief: buying group, the competitor's likely moves, the risk, the first question, the proof
Skill	`/calven:quality-review`	An asset reviewed before it ships: every claim checked, on-message fit, what a product change left stale, and a persona review
Skill	`/calven:persona-copy-review`	Your copy reviewed against your personas, findings by severity
Skill	`/calven:on-message-draft`	Copy written from your approved messaging, accuracy-checked and persona-tested before you get it
Skill	`/calven:customer-evidence`	Verbatim customer quotes, themes and proof points on a topic, each with its source
Skill	`/calven:icp-check`	A list of accounts checked against your ICP: fit, partial or no fit, and why
Skill	`/calven:icp-pipeline-review`	A live dashboard of how much of your pipeline and wins fit the ICP, and where to focus
Skill	`/calven:win-loss-review`	A live win/loss dashboard for a month or quarter, every rate with its sample size
Skill	`/calven:market-research`	A sourced market briefing: trends, opportunities, growing verticals and the latest signals
Skill	`/calven:product-intelligence`	What changed in your product and which published assets now contradict it
Skill	`/calven:gtm-overview`	A sourced summary of your positioning, messaging, ICP and evidence
Skill	`/calven:start`	Connection check and what your workspace can answer (runs only when you type it)
Subagent	`gtm-researcher`	Gathers evidence from several Calven sources and keeps large results out of your conversation

Skills load on their own when a request matches, except start, which runs only when typed; you can type any of them. The two dashboard skills publish a live page that reads Calven each time it opens: an artifact in Claude, a Site in ChatGPT. Cursor installs it from its own manifest, and clients that implement Agent Plugins can import the skills and the server connection. Contents, formats and how the workflows are tested: plugin.

Help

calven.ai/mcp · Troubleshooting · Open a connection issue · support@calven.ai

This repository is the public distribution surface for Calven's hosted MCP server; the server source is private. Manifests, validation and contribution rules are in docs/ and CONTRIBUTING.md. Report security issues through SECURITY.md.

This repository is MIT licensed; the Calven service is not · Privacy · Terms

Calven

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Marketing & social mediai

Common questions

Alternatives

MCP YouTube Transcript

Google Analytics MCP

BibiGPT YouTube Video Summarizer

README from the maker

Connect

Try it

What it reads, and what it won't do

The plugin

Help