C64 Bridge

io.github.chrisgleissner/c64bridgev1.0.2Other

MCP server for Commodore 64 Ultimate hardware and VICE emulator control.

The current version, v1.0.2, was published to the official MCP registry on 2026-08-07. It is distributed as c64bridge on npm, filed under Other by this index, and declares 10 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; the index's current counts put this record in context.

In-path gate · all MCP tools

Using C64 Bridge in Claude, Cursor, Gemini CLI, Cline, or Zed?

MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).

Install the mcpindex gate (one command)

Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less

uv tool install mcpindex-gate && mcpindex-config-wire

Auditable install path →Watch it hold a drift →

Trust verdict · v1 advisory · method

REVIEWstatus: PARTIALfresh until 2026-09-21 16:29 UTC

screened 2026-07-08tier: scannedgranularity: description-levelsource: registry

Semantic screen found no manipulation pattern in the description. Conformance probe not yet run.

mcpindex.integrity.descriptionpassINFO

evidence“No malicious instructions found”via static_description

Limits of this verdict

- Semantic screen only - the deterministic conformance probe has not run on this server
- Confidence is reported but not yet calibrated (v1)
- Screen reads the tool description, not the live behavior
- advisory
- registry description only no input schema
- screen model 8b
- Still current: the description we screened is unchanged, re-checked against the registry
- The registry listing (version, packages, links) changed after this screen ran - the description we assessed did not

Semantic screen: an LLM judge reads the tool description for hidden instructions (status PARTIAL). A pass means the description is not lying, not that the tool is safe: a high-capability tool with an honest description still warrants caution. The deterministic conformance probe has not been run on this server yet, so the screen here is semantic-only. Posture: advisory. Confidences are reported but not yet calibrated (calibrated=false at v1). Full verdict history is not shown on this page.

Own this server? Screen its description →

That verdict was true at screening time (snapshot 2026-09-14).

Contracts can change after screening, with no version bump. The gate pins C64 Bridge’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday.

See your first HOLD in 2 minutes →

Cite this record

People vet a server before wiring it in. One line on your project site or docs answers that with an independent record: screening verdict, registry provenance, contract drift history. It stays current as new screens and drift events land.

Markdown

[Independent trust record for C64 Bridge](https://mcpindex.ai/server/io-github-chrisgleissner-c64bridge) - screening verdict, registry provenance, and contract drift monitoring.

HTML

<a href="https://mcpindex.ai/server/io-github-chrisgleissner-c64bridge">Independent trust record for C64 Bridge</a> - screening verdict, registry provenance, and contract drift monitoring.

Embed this badge

A live verdict badge for your README or listing. It reflects the current screen, links back here, and updates when the verdict does.

Markdown

[![mcpindex](https://mcpindex.ai/api/v1/badge/io-github-chrisgleissner-c64bridge)](https://mcpindex.ai/server/io-github-chrisgleissner-c64bridge)

HTML

<a href="https://mcpindex.ai/server/io-github-chrisgleissner-c64bridge"><img src="https://mcpindex.ai/api/v1/badge/io-github-chrisgleissner-c64bridge" alt="mcpindex verdict" height="20" /></a>

Environment variables

LOG_LEVEL

Logger verbosity.

C64BRIDGE_CONFIG

Path to the C64 Bridge configuration file.

C64_MODE

Active backend.

C64U_HOST

Ultimate 64 host name or IP address.

C64U_PORT

Ultimate 64 REST port.

C64U_PASSWORD

secret

Ultimate 64 network password sent as X-Password.

VICE_BINARY

VICE emulator binary to launch.

VICE_VISIBLE

Launch VICE with a visible window when possible.

VICE_WARP

Enable VICE warp mode.

GITHUB_TOKEN

secret

GitHub token for optional RAG discovery against GitHub.

MCP quality score · maturity, not trust · methodology

freshness

completeness

installability

documentation

stability

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Install this server

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "c64bridge": {
      "command": "npx",
      "args": [
        "-y",
        "--",
        "c64bridge"
      ],
      "env": {
        "LOG_LEVEL": "info",
        "C64BRIDGE_CONFIG": "~/.c64bridge.json",
        "C64_MODE": "c64u",
        "C64U_HOST": "c64u",
        "C64U_PORT": "80",
        "C64U_PASSWORD": "<your-c64u_password>",
        "VICE_BINARY": "x64sc",
        "VICE_VISIBLE": "true",
        "VICE_WARP": "false",
        "GITHUB_TOKEN": "<your-github_token>"
      }
    }
  }
}

Cursor (.cursor/mcp.json)

{
  "mcpServers": {
    "c64bridge": {
      "command": "npx",
      "args": [
        "-y",
        "--",
        "c64bridge"
      ],
      "env": {
        "LOG_LEVEL": "info",
        "C64BRIDGE_CONFIG": "~/.c64bridge.json",
        "C64_MODE": "c64u",
        "C64U_HOST": "c64u",
        "C64U_PORT": "80",
        "C64U_PASSWORD": "<your-c64u_password>",
        "VICE_BINARY": "x64sc",
        "VICE_VISIBLE": "true",
        "VICE_WARP": "false",
        "GITHUB_TOKEN": "<your-github_token>"
      }
    }
  }
}

Cline (cline_mcp_settings.json)

npx -y -- c64bridge

Claude Code (claude mcp add)

claude mcp add --scope user c64bridge -- npx -y -- c64bridge

Gemini CLI (gemini mcp add)

gemini mcp add -s user c64bridge npx -y -- c64bridge

Verdict API

curl -s mcpindex.ai/api/v1/trust/server/io-github-chrisgleissner-c64bridge

Free-tier verdict as JSON: decision + dimensions + severity. Call it from your agent before it invokes a tool it just discovered.

Details

version: v1.0.2
category: Other
verdict expires: 2026-09-21
quality: 94 / 100
operator: chrisgleissner

Listing

Listed from the official MCP registry. Unclaimed by its maintainer. Maintainer? Email us →

Provenance

Each verdict is bound to a hash of the exact description it judged, so a re-crawl that changes the text produces a new record rather than silently inheriting this one. Verdict history is hash-chained and anchored to Bitcoin via OpenTimestamps (latest confirmed at block 966,915). Verify it yourself.

Links

Repository →Website →