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8 clients · secrets stay placeholders

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{
  "mcpServers": {
    "postals-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "POSTALS_API_KEY": "${POSTALS_API_KEY}",
        "CLOUDFLARE_API_TOKEN": "${CLOUDFLARE_API_TOKEN}"
      }
    }
  }
}

claude mcp add postals-mcp -e "POSTALS_API_KEY=${POSTALS_API_KEY}" -e "CLOUDFLARE_API_TOKEN=${CLOUDFLARE_API_TOKEN}" -- npx -y [email protected]

[mcp_servers.postals-mcp]
command = "npx"
args = ["-y", "[email protected]"]
env = { "POSTALS_API_KEY" = "${POSTALS_API_KEY}", "CLOUDFLARE_API_TOKEN" = "${CLOUDFLARE_API_TOKEN}" }

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "postals-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "[email protected]"
      ],
      "enabled": true,
      "environment": {
        "POSTALS_API_KEY": "{env:POSTALS_API_KEY}",
        "CLOUDFLARE_API_TOKEN": "{env:CLOUDFLARE_API_TOKEN}"
      }
    }
  }
}

{
  "mcpServers": {
    "postals-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "POSTALS_API_KEY": "${POSTALS_API_KEY}",
        "CLOUDFLARE_API_TOKEN": "${CLOUDFLARE_API_TOKEN}"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=postals-mcp&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsInBvc3RhbHMtbWNwQDEuMC4wIl0sImVudiI6eyJQT1NUQUxTX0FQSV9LRVkiOiIke1BPU1RBTFNfQVBJX0tFWX0iLCJDTE9VREZMQVJFX0FQSV9UT0tFTiI6IiR7Q0xPVURGTEFSRV9BUElfVE9LRU59In19"
}

{
  "servers": {
    "postals-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "POSTALS_API_KEY": "${POSTALS_API_KEY}",
        "CLOUDFLARE_API_TOKEN": "${CLOUDFLARE_API_TOKEN}"
      }
    }
  }
}

{
  "mcpServers": {
    "postals-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "POSTALS_API_KEY": "${POSTALS_API_KEY}",
        "CLOUDFLARE_API_TOKEN": "${CLOUDFLARE_API_TOKEN}"
      }
    }
  }
}

extensions:
  "postals-mcp":
    enabled: true
    name: "postals-mcp"
    type: stdio
    cmd: "npx"
    args:
      - "-y"
      - "[email protected]"
    envs:
      "POSTALS_API_KEY": "${POSTALS_API_KEY}"
      "CLOUDFLARE_API_TOKEN": "${CLOUDFLARE_API_TOKEN}"
    timeout: 300

Placeholders to fill from your own secret store: ${POSTALS_API_KEY}, ${CLOUDFLARE_API_TOKEN}. The registry never accepts secret values.

This is a local package: the command runs on your machine.

Quality – / 100not scored

Not scored: fewer than three checks apply, usually because no remote answered a credential-free probe or the server is a local package.

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)

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
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 98 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[email protected] resolved: 98 packages

Tool list unknown · checked 2026-10-20 15:57 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 76 / 100

provenance80

livenessn/a

freshness45

hygiene100

+repository +namespace-matches-repo ~liveness-unmeasured -stale-188d

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

Dependencies

[email protected] npm97 dependencies, resolved · MCP SDK @modelcontextprotocol/sdk 1.30.1 · advisories checked 2026-10-19

advisory	severity	package	fixed in
GHSA-6qxp-vccf-f47hMCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server	high	`@modelcontextprotocol/[email protected]`MCP SDK, direct	fixed 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

package	registry	version	runtime	secrets
`postals-mcp`	npm	1.0.0	–	`POSTALS_API_KEY`, `CLOUDFLARE_API_TOKEN`

Tools (0)

No tools observed. Local packages are never executed by the registry.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "io.github.coopergwrenn/postals-mcp",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "version": "1.0.0",
  "packages": [
    {
      "version": "1.0.0",
      "transport": {
        "type": "stdio"
      },
      "identifier": "postals-mcp",
      "registryType": "npm",
      "environmentVariables": [
        {
          "name": "POSTALS_API_KEY",
          "format": "string",
          "isSecret": true,
          "isRequired": true,
          "description": "Your Handwrytten API key (v1.0) or Postals API key (v1.1+)."
        },
        {
          "name": "POSTALS_SENDER_NAME",
          "format": "string",
          "description": "Default sender full name for return address."
        },
        {
          "name": "POSTALS_SENDER_ADDRESS",
          "format": "string",
          "description": "Default sender street address."
        },
        {
          "name": "POSTALS_SENDER_CITY",
          "format": "string",
          "description": "Default sender city."
        },
        {
          "name": "POSTALS_SENDER_STATE",
          "format": "string",
          "description": "Default sender 2-letter US state code."
        },
        {
          "name": "POSTALS_SENDER_ZIP",
          "format": "string",
          "description": "Default sender 5-digit ZIP (or 5+4 format)."
        },
        {
          "name": "POSTALS_DEFAULT_CARD_IMAGE",
          "format": "string",
          "description": "Default card front image URL (HTTPS, PNG or JPEG, landscape 7x5 preferred)."
        },
        {
          "name": "POSTALS_HANDWRITING_STYLE",
          "format": "string",
          "description": "Default handwriting font. Default: Joyful Jennifer."
        },
        {
          "name": "POSTALS_DAILY_LIMIT",
          "format": "string",
          "description": "Max cards per day (safety net). Default: 50."
        },
        {
          "name": "POSTALS_TEST_MODE",
          "format": "string",
          "description": "Set to 'true' for test mode (validates inputs, no cards actually sent)."
        },
        {
          "name": "CLOUDFLARE_ACCOUNT_ID",
          "format": "string",
          "description": "Optional. Enables AI message generation via Cloudflare Workers AI."
        },
        {
          "name": "CLOUDFLARE_API_TOKEN",
          "format": "string",
          "isSecret": true,
          "description": "Optional. Required together with CLOUDFLARE_ACCOUNT_ID for AI message generation."
        }
      ]
    }
  ],
  "repository": {
    "url": "https://github.com/coopergwrenn/postals-mcp",
    "source": "github"
  },
  "description": "Send physical handwritten postcards from any AI agent. Real pen & ink, USPS, $4.99/card."
}