MCP.Market

Kaption WhatsApp (Cloud) MCP server

online · 100% uptime
by Kaption-AI·io.github.Kaption-AI/mcp-extension-remote·v1.0.0·1 stars
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Use WhatsApp from AI apps through the Kaption extension. OAuth 2.1 relay that cannot read messages.

A98/100grade A
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Safety scan
A98/100

full report

Adoption
Growing

1 stars

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Kaption WhatsApp (Cloud) tools

Tool list not cached yet. `describe` through the gateway fetches it live.

Public scan report

scanner v0.1.10 · 2026-10-14 · same rubric, same numbers if you re-run it

no findings
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 403ms (auth required)20/20
  • –Tool poisoningtools not inspected (endpoint requires auth); not countedn/a
  • Auth qualityOAuth resource metadata advertised on 40115/15
  • Maintenancelast push 1 days ago15/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year9/10
Overall 98/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Kaption WhatsApp (Cloud) compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
98/100
higher than 99% of 48,273 servers
Uptime
100%
of our recent checks; the typical remote server answers 100%
Response time
513 ms
faster than 30% of 30,037 servers
GitHub stars
1
more than 65% of 28,534 servers

Install Kaption WhatsApp (Cloud) in Claude Code, Cursor or VS Code

claude mcp add --transport http mcp-extension-remote https://mcp.kaptionai.com/mcp
Add to Cursor

What the publisher says

From the Kaption WhatsApp (Cloud) repository's README, as published. We do not edit it. Read it on GitHub

kaption-mcp-remote

Cloud MCP relay for WhatsApp — lets AI assistants (Claude, ChatGPT, Cursor, etc.) interact with your WhatsApp conversations through the Model Context Protocol.

Setup guide: kaptionai.com/mcp — connect WhatsApp to Claude, ChatGPT or Cursor.

Live at: mcp.kaptionai.com (canonical) and mcp-ext.kaptionai.com (backward-compatible alias for existing connections)

The relay cannot read your messages. It forwards MCP tool calls between the AI client and the Kaption browser extension, which processes everything locally in your browser. Its source code is public (BUSL-1.1), so you can verify it yourself.

Architecture

AI Client (Claude/ChatGPT/Cursor)
    │
    │ OAuth 2.1 + SSE/Streamable HTTP
    ▼
┌─────────────────────────────────────┐
│  Cloudflare Worker                  │
│  mcp.kaptionai.com                 │
│                                     │
│  ┌────────────┐  ┌──────────────┐  │
│  │ OAuthProv  │  │ Next.js      │  │
│  │ /sse /mcp  │  │ /authorize   │  │
│  │ /token     │  │ /ext-auth    │  │
│  │ /register  │  │ / (landing)  │  │
│  └─────┬──────┘  └──────────────┘  │
│        │                            │
│  ┌─────▼──────┐  ┌──────────────┐  │
│  │ RelayMCP   │  │ Deployment   │  │
│  │ (DO)       │  │ ChainDO      │  │
│  └─────┬──────┘  └──────────────┘  │
│        │                            │
│  ┌─────▼──────┐                    │
│  │ RelayRoom  │ ◄── WebSocket ──┐  │
│  │ (DO/accountRef) │            │  │
│  └────────────┘                 │  │
└─────────────────────────────────┼──┘
                                  │
                          Browser Extension
                          (WhatsApp Web tab)

Durable Objects

Request Flow

  1. AI client discovers the MCP server via /.well-known/oauth-authorization-server
  2. Client registers dynamically via POST /register (RFC 7591)
  3. User authenticates with WhatsApp OTP at /authorize
  4. Client exchanges code for token at /token
  5. Client sends tool calls via SSE (/sse) or Streamable HTTP (/mcp)
  6. RelayMCP DO receives the call, routes to RelayRoom for the accountRef
  7. RelayRoom forwards JSON-RPC to the extension over WebSocket
  8. Extension executes in WhatsApp Web context, returns result
  9. Result flows back: RelayRoom → RelayMCP → AI client

Routing Table

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Kaption WhatsApp (Cloud): common questions

Is Kaption WhatsApp (Cloud) MCP server safe?
Yes, by our scan: it is graded A (98/100). Read the Kaption WhatsApp (Cloud) safety report
How do I install Kaption WhatsApp (Cloud)?
It runs remotely at mcp.kaptionai.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Kaption WhatsApp (Cloud) need an API key?
No key to paste: it signs you in with OAuth when your client connects.
Is Kaption WhatsApp (Cloud) maintained?
The last commit was 20 days ago (2026-10-13). The latest release is v1.0.0.
Is Kaption WhatsApp (Cloud) up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
What can I use instead of Kaption WhatsApp (Cloud)?
Servers from other publishers that do the same job: Mobilerun MCP server.
How does Kaption WhatsApp (Cloud) compare with other MCP servers?
safety score 98/100 (higher than 99% of 48,273 servers); uptime 100% (of our recent checks; the typical remote server answers 100%); response time 513 ms (faster than 30% of 30,037 servers). Full comparison.

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