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Astrocal

R2· OAuth, once

AI-native scheduling: check availability, book meetings, cancel and reschedule via MCP

v0.1.6 · active · repository · website · descriptor JSON · versions

An agent can connect after a one-time OAuth consent by a human.Remote endpoint behind OAuth 2. Tokens stay with the agent; the registry only exposes the authorization metadata.
Quality75good
Trust87of 100
Uptime, 30 days90%
Latency p50410 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "astrocal": {
      "type": "http",
      "url": "https://api.astrocal.dev/mcp"
    }
  }
}
claude mcp add --transport http astrocal https://api.astrocal.dev/mcp
[mcp_servers.astrocal]
url = "https://api.astrocal.dev/mcp"
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "astrocal": {
      "type": "remote",
      "url": "https://api.astrocal.dev/mcp",
      "enabled": true
    }
  }
}
{
  "mcpServers": {
    "astrocal": {
      "type": "http",
      "url": "https://api.astrocal.dev/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=astrocal&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vYXBpLmFzdHJvY2FsLmRldi9tY3AifQ%3D%3D"
}
{
  "servers": {
    "astrocal": {
      "type": "http",
      "url": "https://api.astrocal.dev/mcp"
    }
  }
}
{
  "mcpServers": {
    "astrocal": {
      "httpUrl": "https://api.astrocal.dev/mcp"
    }
  }
}
extensions:
  "astrocal":
    enabled: true
    name: "astrocal"
    type: streamable_http
    uri: "https://api.astrocal.dev/mcp"
    timeout: 300

Quality 75 / 100good

protocoln/a · weight 25
  • n/a
    protocol.modern, protocol.stateless, protocol.transport, protocol.list_ttlno remote answered a protocol handshake (not probed yet, unreachable, or local-only)
authorization83 · weight 15
  • pass
    auth.prmProtected Resource Metadata (RFC 9728) published
  • pass
    auth.as_metadataauthorization server metadata reachable
  • warn
    auth.cimdonly Dynamic Client Registration, deprecated in 2026-07-28 in favour of CIMD
  • n/a
    auth.secret_in_urlno templated URL
tool hygienen/a · weight 30
  • n/a
    tools.descriptions, tools.description_length, tools.schemas, tools.annotations, tools.directory_hints, tools.token_cost, tools.api_dumptool list unknown (behind auth, not probed, or empty)
stabilityn/a · weight 15
  • n/a
    stability.changes, stability.rug_pulltool list unknown
dependencies67 · weight 15
  • pass
    deps.known_vulnsno known advisory in 101 resolved packages
  • fail
    deps.mcp_sdk_version@modelcontextprotocol/sdk 1.30.1 has 1 known advisory (GHSA-6qxp-vccf-f47h); update @modelcontextprotocol/sdk to 1.31.0 or later
  • pass
    deps.resolvable@astrocal/[email protected] resolved: 101 packages

Tool list unknown · checked 2026-10-19 16:53 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 87 / 100

provenance85
liveness96
freshness65
hygiene100

+repository +dns-namespace +website +reachable +uptime-90% ~updated-117d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Dependencies

@astrocal/[email protected] npm100 dependencies, resolved · MCP SDK @modelcontextprotocol/sdk 1.30.1 · advisories checked 2026-10-19

advisoryseveritypackagefixed in
GHSA-6qxp-vccf-f47hMCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP serverhigh@modelcontextprotocol/[email protected]MCP SDK, directfixed in 1.31.0

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0. The graph is what a clean install of this version resolves today; nothing was installed or run. How it is checked.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://api.astrocal.dev/mcp streamable-httpoauth2 AS: https://api.astrocal.devyes90%410 ms–2026-10-19
packageregistryversionruntimesecrets
@astrocal/mcp-servernpm0.1.6–ASTROCAL_API_KEY

Tools (0)

No tools observed. Tools appear once a credential-free probe can list them.

Schemas: list_tools.

Similar MCP servers

Official server.json
{
  "name": "dev.astrocal/mcp-server",
  "title": "Astrocal",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://api.astrocal.dev/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.1.6",
  "packages": [
    {
      "version": "0.1.6",
      "transport": {
        "type": "stdio"
      },
      "identifier": "@astrocal/mcp-server",
      "registryType": "npm",
      "environmentVariables": [
        {
          "name": "ASTROCAL_API_KEY",
          "format": "string",
          "isSecret": true,
          "isRequired": true,
          "description": "Your Astrocal API key (create one at https://astrocal.dev/dashboard/connect)"
        },
        {
          "name": "ASTROCAL_API_URL",
          "format": "string",
          "description": "Custom API base URL (defaults to https://api.astrocal.dev)"
        },
        {
          "name": "ASTROCAL_DEFAULT_EVENT_TYPE_ID",
          "format": "string",
          "description": "Default event type ID when not specified in tool calls"
        }
      ]
    }
  ],
  "repository": {
    "url": "https://github.com/astrocal-dev/mcp-server",
    "source": "github"
  },
  "websiteUrl": "https://astrocal.dev",
  "description": "AI-native scheduling: check availability, book meetings, cancel and reschedule via MCP"
}