Koskamo

Chamber MCP

Chamber is an attested signing and attestation service that provides a stdio MCP server for sealing and opening JSON envelopes. It ensures message provenance by signing data with keys stored in local files and stamping envelopes with a custody level, allowing verifiers to distinguish between production and test signatures without relying on external trust.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Chamber MCP logo, by Slid Phi LabsCommunity listingLocal stdioSource reviewed; not executedPublished by Slid Phi Labs
Vendor documentation

What you can do with it

  • Seal JSON messages with cryptographic signatures
  • Open and verify previously sealed JSON blobs
  • Stamp envelopes with key custody levels for provenance
  • Rotate signing keys by moving local key files

Source and maintenance

Community listingRegistry 1.2.0
mcp-registry: io.github.ceedot-rock/json-chamber-mcp@1.2.0Source repositoryProject website
Last repository push
Latest release
v1.2.0
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

json-chamber-mcp 1.2.0

npmnpx
json-chamber-mcp package definition
{
  "version": "1.2.0",
  "transport": "stdio",
  "identifier": "json-chamber-mcp",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "runtimeArguments": [
    {
      "type": "positional",
      "value": "-y"
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · repository · passed · metadata changed · updated
  • · backfill · recorded · Pre-expansion baseline; unobserved rich metadata remains unknown

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "chamber-mcp-json-chamber-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "json-chamber-mcp@1.2.0"
      ]
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "chamber-mcp-json-chamber-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "json-chamber-mcp@1.2.0"
      ]
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "chamber-mcp-json-chamber-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "json-chamber-mcp@1.2.0"
      ]
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "chamber-mcp-json-chamber-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "json-chamber-mcp@1.2.0"
      ]
    }
  }
}

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