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PopNx MCPServidores MCP para quienes usan IA · explicados con palabras sencillas

Cosmos MCP

de teampolarityversión 0.7.1i★ –iSe ejecuta en tu computadora
Nombre en el registroio.github.teampolarity/cosmos-mcp

Instalar

Resumen

Descripción del creador (original en inglés)

Personal knowledge graph every MCP client reads from and writes to. Portable across agents.

Los tres pilares de PopNx MCP

Estos tres nunca se combinan en una sola puntuación: las opiniones, las mediciones y la popularidad son cosas distintas.

Qué puedes hacer con él

Todavía no escribimos un resumen sencillo para este. Abajo están los datos que leímos del registro.

  • Conexión: Se ejecuta en tu computadora
  • Transporte: stdio
  • Categoría: Búsqueda y memoria de IA
  • Debes completar: COSMOS_TOKEN

Instalación

Elige la app de IA que usas y copia la configuración.

Antes de instalar

Los valores marcados como secretos son llaves de tu cuenta. Nunca los compartas ni los pegues en un chat.

Necesitas

  • npmNode.js instalado (para el comando npx)

¿Qué app usas?

Elige tu app arriba. La recordamos, así que la próxima vez el botón dirá “Instalar en …”.

Abre Claude Desktop → Settings → Developer → Edit Config y pega esto en claude_desktop_config.json

{
  "mcpServers": {
    "cosmos": {
      "command": "npx",
      "args": [
        "-y",
        "@polarity-lab/cosmos-mcp"
      ],
      "env": {
        "COSMOS_TOKEN": "your-value"
      }
    }
  }
}

Ejecuta esto en tu terminal

claude mcp add cosmos --env COSMOS_TOKEN=your-value -- npx -y @polarity-lab/cosmos-mcp

Completa los valores vacíos antes de ejecutarlo.

Abrir en Cursor

O copia la configuración tú

Pégalo en .cursor/mcp.json de tu proyecto, o en ~/.cursor/mcp.json

{
  "mcpServers": {
    "cosmos": {
      "command": "npx",
      "args": [
        "-y",
        "@polarity-lab/cosmos-mcp"
      ],
      "env": {
        "COSMOS_TOKEN": "your-value"
      }
    }
  }
}

Tu navegador te pide permiso para abrir la app; luego la app muestra la configuración y te pide confirmar. Los valores de las claves quedan vacíos para que los completes tú.

Abrir en VS Code

O copia la configuración tú

Pégalo en .vscode/mcp.json de tu proyecto

{
  "servers": {
    "cosmos": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@polarity-lab/cosmos-mcp"
      ],
      "env": {
        "COSMOS_TOKEN": "your-value"
      }
    }
  }
}

Tu navegador te pide permiso para abrir la app; luego la app muestra la configuración y te pide confirmar. Los valores de las claves quedan vacíos para que los completes tú.

Este se ejecuta en tu computadora, y ChatGPT solo puede conectarse a servidores en internet. Elige otra app.

Tu elección se guarda en una cookie en este dispositivo; no necesitas cuenta.

Valores que debes completar

  • COSMOS_TOKEN secreto env
    pmk_ key from https://cosmos.polarity-lab.com/connectors. Optional on macOS once the system keychain is provisioned via `npx -y @polarity-lab/cosmos-mcp provision pmk_...`.

Esta configuración se genera a partir de la ficha del creador en el registro. Si el README dice otra cosa, sigue el README.

Qué puede hacer

Se ejecuta en tu computadora; la lista de herramientas aparece en tu app de IA después de instalarlo.

Revisiones básicasi

Revisamos información que cualquiera puede ver; no hemos leído el código. Las revisiones que no aplican no se cuentan. · Revisado el 8 nov 2026

  • ✓ Superada

    El creador coincide con el repo

    El nombre en el registro se verificó con la cuenta de GitHub teampolarity, dueña del repo

  • … Aún sin revisar

    Sigue en mantenimiento

    Todavía no hemos leído este repo en GitHub

  • … Aún sin revisar

    Tiene licencia

    Todavía no hemos leído este repo en GitHub

  • – No aplica

    El endpoint responde

    Este se ejecuta en tu computadora; no hay endpoint en internet

  • – No aplica

    Inicio de sesión con OAuth

    Se ejecuta en tu computadora y usa ajustes locales en su lugar

  • … Aún sin revisar

    Sin instrucciones ocultas en las descripciones de herramientas

    Se ejecuta en tu computadora; solo podemos leer listas de herramientas de endpoints en internet

Comparado con otros en Búsqueda y memoria de IAi

  • Más estrellas que el 0% de los otros 5670 servidores de esta categoría
  • Publicado en el registro más recientemente que el 14% de los otros 5670 servidores de esta categoría
  • Revisiones básicas iguales o mejores que el 100% de los otros 5670 servidores de esta categoría

Comparado con todos los servidores activos de esta categoría en el registro. Las estrellas solo cuentan cuando quien lo publica es dueño del repo.

Preguntas frecuentes

¿Es seguro Cosmos MCP?

Superó 1 de 1 revisiones básicas aplicables. No hemos leído el código. Antes de agregar una clave o un token, revisa qué acceso pide el servidor y usa una clave que tenga solo los permisos que necesitas.

¿Qué claves o códigos necesita?

Debes completar: COSMOS_TOKEN

¿Se ejecuta en mi computadora o en la nube?

Se ejecuta en tu computadora. Tu app de IA lo inicia cuando hace falta, y los datos no pasan por los servidores del creador (a menos que el propio servidor llame a un servicio en línea).

¿Sigue en mantenimiento?

El repo de GitHub cambió por última vez –, y la última versión (0.7.1) llegó al registro hace 6 meses.

¿Qué apps pueden usarlo?

Las apps compatibles con MCP, como Claude Desktop, Claude Code, Cursor y VS Code. También necesitas Node.js en tu computadora.

¿Qué puedo usar en su lugar?

En la misma categoría: Context7, Codebase Memory, Exa

Alternativas

Servidores de la misma categoría hechos por otros creadores, ordenados por estrellas.

Cómo leer una tarjeta:★ Estrellas de GitHubiTres pilares: reseñas · revisiones · usoiActualizado = fecha en que se publicó la última versión en el registroi

Context7

de upstash

Up-to-date docs for AI agents

Computadora o nube★ 64.224MITActualizado ayer
Instalar

Codebase Memory

de DeusData

Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.

Se ejecuta en tu computadora★ 48.148MITActualizado hace 21 días
Instalar

Exa

de exa-labs

Connect AI agents to Exa for web search, content fetching, and multi-step research.

Se ejecuta en la nube★ 5213MITActualizado hace 2 meses
Instalar

README del creador

Abrir el README

Copiado tal cual del repo del creador. PopNx MCP no lo ha revisado ni lo respalda. Se quitaron HTML, imágenes y scripts. Los enlaces llevan fuera de este sitio.

cosmos-mcp

One exocortex. Every agent.

MCP server for your Cosmos graph.


Every AI you use is building its own private graph of you. Claude has one. ChatGPT has one. Cursor has one. None of them talk to each other, and none of them are yours.

Cosmos inverts that. Your knowledge graph lives in one place, and any MCP-capable client (Claude Code, Claude Desktop, Cursor, Codex, Zed, Continue) reads and writes to the same one. When an agent notices something durable about you, it lands in the graph. When you switch tools, the graph follows. The user, not the platform, owns the integration layer.

The thing you carry is a .polarity file. Yours.

One-line install

curl -fsSL https://mcp.polarity-lab.com/install.sh | sh

On macOS this installs the MCP server, registers cosmos-mcp://, wires Claude Desktop, Claude Code, Cursor, Codex, Zed, and Continue, then installs Cosmos Sync.app so iMessage, browser history, calendar, Claude Desktop transcripts, and shell history can sync in the background. On linux and windows it installs the MCP server path only.

If you want to inspect before changing anything:

curl -fsSL https://mcp.polarity-lab.com/install.sh -o install.sh

bash install.sh --dry-run bash install.sh

Provisioning

There are two ways to get a pmk_… key onto your Mac.

Automatic. Sign in at cosmos.polarity-lab.com/connectors, tap "open in cosmos-mcp." The OS opens a one-shot handler that writes the key into your system keychain. You never see the raw key.

For that deep link to work, register the URL scheme once:

npx -y @polarity-lab/cosmos-mcp install-handler

This drops a tiny .app into ~/Library/Application Support/cosmos-mcp/ and registers cosmos-mcp:// with Launch Services. macOS-only.

Manual. If you already have a pmk_… key, or you do not want to install the handler:

npx -y @polarity-lab/cosmos-mcp provision pmk_xxx

The CLI validates the key against cosmos, then stores it in the macOS system keychain under service cosmos-mcp-key. Subsequent imessage sync, browser sync, calendar sync calls read from the keychain. No env var needed.

Confirm iMessage access.

npx -y @polarity-lab/cosmos-mcp imessage probe

Verifies Full Disk Access is granted and reports how many chats are visible. If you see an EACCES message, open System Settings, Privacy & Security, Full Disk Access, and add Terminal (or whichever app runs the CLI).

CI. Set COSMOS_TOKEN=pmk_… in env. It takes precedence over the keychain, so existing pipelines keep working untouched.

Manual MCP config

The installer handles this for common clients. If you want to wire a client by hand, point it at the package.

npx -y @polarity-lab/cosmos-mcp init

This opens your browser. Sign in at cosmos.polarity-lab.com, approve a per-user key, and the token lands at ~/.config/cosmos-mcp/token (0600). Then point any MCP client at it:

{

"mcpServers": { "cosmos": { "command": "npx", "args": ["-y", "@polarity-lab/cosmos-mcp"] } } }

That config drops into ~/Library/Application Support/Claude/claude_desktop_config.json for Claude Desktop, your .cursor/mcp.json for Cursor, the equivalent for whichever client.

What you get

Eleven tools, four read, seven write.

Read

ToolCallsWhat it returns
polarity_whoamiGET /api/polarity/whoamiBound user + scopes. Cheap probe.
polarity_exportPOST /api/polarity/exportFull personal graph as polarity/v1 JSON.
polarity_get_graphGET /api/polarityGraph view, scoped by entity (user, cosmos, polarity).
polarity_askPOST /api/polarity/askNL question synthesized over the graph.

Write

ToolCallsWhat it does
polarity_observePOST /api/polarity/observeFreeform observation. Cosmos extracts.
polarity_record_eventPOST /api/polarity/observe (kind=event)Something happened at a point in time.
polarity_record_preferencePOST /api/polarity/observe (kind=preference)A like, dislike, working-style rule.
polarity_capture_turnPOST /api/polarity/capture-turnHand a whole user/assistant exchange to cosmos. Pulls every durable observation in one call. Prefer over multiple polarity_observe calls.
polarity_reconstruct_hoursPOST /api/polarity/reconstruct-hoursPersist life-hour receipts onto the skill-map sky (per user only). Use from Cursor/Cosmos IDE after substantive work.
polarity_dumpPOST /api/polarity/dumpLocation-anchored short message.
polarity_checkinPOST /api/polarity/checkinCheck-in at a waypoint. Triggers co-presence detection.
polarity_declarePOST /api/polarity/declareDeclare future presence at a waypoint.

Sources

The MCP server is one way to write to the graph. Cosmos accepts source pages from anywhere you keep notes, and the MCP read tools see all of it through the same view.

SourceHow it connectsWhat lands
iMessageLocal CLI: npx -y @polarity-lab/cosmos-mcp imessage sync. Mac only. Grant Terminal Full Disk Access first.Conversational turns from chat.db, with text content. People appear as person nodes in your graph, sized by conversation weight, named via your local AddressBook, dated by your real message timestamps.
Claude DesktopLocal CLI: npx -y @polarity-lab/cosmos-mcp claude-desktop sync. Reads Claude Code session transcripts at ~/.claude/projects/.Every Claude Code session becomes a thread node; user and assistant turns land in conversation_turns with full text. Tool-use plumbing is stripped client-side.
Shell historyLocal CLI: npx -y @polarity-lab/cosmos-mcp shell-history sync. Reads ~/.zsh_history (falls back to bash/fish) with a byte-offset watermark.Each sync window lands as one source_page keyed by shell-history: , body = newline-joined commands. Trivial commands (ls, cd .., single chars) and consecutive duplicates are filtered client-side.
NotionOAuth at cosmos.polarity-lab.com/connectors. Pick the pages and databases you want shared.Each Notion page becomes a source_page node, keyed by Notion id, kept fresh by a daily sync.
ObsidianCommunity plugin: polarity-lab/obsidian-cosmos. Paste your pmk_ key, point at your vault.Each note becomes a source_page node keyed by vault-relative path. Tags and wikilinks resolve into edges.
MCP clientsThis package.Observations, events, preferences, location dumps, check-ins, declarations.
Direct APIPOST /api/polarity/observe with your key.Anything you can express as an observation.

Unchanged pages are skipped server-side, so re-syncing a quiet vault or stable Notion workspace costs almost nothing. The iMessage sync is incremental too, watermarked on the last successful run, so re-running it is a no-op until new messages arrive.

iMessage sync

cosmos-mcp ships an imessage subcommand that reads your local Messages database and lands every conversation in your graph.

# default: incremental sync, 90-day window on first run

npx -y @polarity-lab/cosmos-mcp imessage sync

re-sync the original 90-day window regardless of watermark

npx -y @polarity-lab/cosmos-mcp imessage sync --backfill

pull everything since a specific date

npx -y @polarity-lab/cosmos-mcp imessage sync --since 2024-01-01

check what the last run did

npx -y @polarity-lab/cosmos-mcp imessage status

A three-rule slop filter (no-reply senders, short-code numbers, low-volume contacts) keeps the graph clean. Your AddressBook resolves phone numbers and emails into real contact names. The reading is local to your Mac; only the extracted, normalized turns go into your cosmos graph, which is your account.

Claude Desktop sync

cosmos-mcp ships a claude-desktop subcommand that watches Claude Code session transcripts and lands each turn in your graph. The desktop chat surface itself stores conversations server-side, so the live, watchable on-disk source is ~/.claude/projects/ / .jsonl.

# default: incremental, watermarked per session

npx -y @polarity-lab/cosmos-mcp claude-desktop sync

limit to recent activity

npx -y @polarity-lab/cosmos-mcp claude-desktop sync --since 2026-05-01

scan and report without shipping

npx -y @polarity-lab/cosmos-mcp claude-desktop sync --dry-run

see what the last run did

npx -y @polarity-lab/cosmos-mcp claude-desktop status

Tool-use blocks, hook plumbing, and sub-agent (sidechain) turns are stripped client-side; only the visible text the user and the assistant exchanged is shipped. Each session id becomes its own thread node, keyed by (user_id, "claude-desktop", session_id).

Background sync (macOS)

cosmos-mcp daemon install drops a LaunchAgent that ticks every four hours and runs the browser, iMessage, calendar, claude-desktop, and shell-history syncs back-to-back. The agent fires a signed, notarized Cosmos Sync.app bundle that ships inside the npm package and gets copied into ~/Applications/Cosmos Sync.app at install time.

npx -y @polarity-lab/cosmos-mcp daemon install

After install, grant the bundle Full Disk Access once:

  1. open System Settings → Privacy & Security → Full Disk Access
  2. click +, then drag ~/Applications/Cosmos Sync.app into the list
  3. make sure the checkbox next to it is on
  4. run cosmos-mcp daemon kick to fire a tick now

Browser sync works without that step. iMessage and Calendar need it because they read TCC-protected SQLite databases on the user side. cosmos-mcp daemon status reports the signing team id, the plist + runner paths, and whether launchd has the agent loaded. cosmos-mcp daemon uninstall removes the plist, runner, and ~/Applications/Cosmos Sync.app.

Configuration

Env varDefaultWhen you set it
COSMOS_URLhttps://cosmos.polarity-lab.comOverride the cosmos API endpoint.
COSMOS_TOKEN(from keychain)pmk_... per-user key for CLI subcommands. Takes precedence over the macOS keychain entry. Set this in CI.
COSMOS_MCP_KEY(from token file)pmk_... per-user key. Honored for back-compat.
COSMOS_USER_ID(from token file)Polarity user id.
COSMOS_SYSTEM_KEY(unset)Single-tenant mode. Sends X-System-Key instead of X-MCP-Key. Requires COSMOS_USER_ID. For internal testing before per-user keys are deployed.

The pitch in three lines

Your AI tools each know fragments of you. They are not allowed to share.

Cosmos is the layer that lets them. You hold the key. The graph is portable.

When you leave, you take the understanding with you.

License

MIT.

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