# Alive2 (oci · ghcr.io/phongndo/alive2-mcp)

Prove or refute LLVM IR transformations with Alive2, and read or create alive2.llvm.org links

- Trust score: 39/100 (low)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- oci · `ghcr.io/phongndo/alive2-mcp`: 39/100 (this document), [markdown](https://verifymcp.io/servers/phongndo-alive2-mcp/ghcr-io-phongndo-alive2-mcp.md), [page](https://verifymcp.io/servers/phongndo-alive2-mcp/ghcr-io-phongndo-alive2-mcp)

## Channel facts

- Registry: `oci`
- Package: `ghcr.io/phongndo/alive2-mcp`
- Version: `0.1.2`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Supply Chain Security**: 0/100
  - No malware scan is available for this kind of package: the supply-chain vendors we use do not cover it. This is a permanent gap in our coverage, not a finding about the package.
  - Known CVEs could not be checked: this image's dependency list comes from an SBOM its publisher attached, which nothing verifies, so we will not report it as a clean result.
  - Install-script risk not yet assessed.
  - Dependency health could not be checked: this image's dependency list comes from an SBOM its publisher attached. It names packages and versions but not whether each is deprecated, still maintained or linked to its source, so there is nothing we can fairly grade.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 1 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 61/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 753 tokens (~251/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 7/100
  - Stability observed for 2 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - All 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.
  - An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### How do I install the Alive2 MCP server?

Alive2 runs locally as a container image, launched with docker run --rm -i ghcr.io/phongndo/alive2-mcp:0.1.2. Ready-made configuration for Claude, Cursor, VS Code, Codex and 3 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add phongndo-alive2-mcp -- docker run --rm -i ghcr.io/phongndo/alive2-mcp:0.1.2
```

### Cursor

```json
{
  "mcpServers": {
    "phongndo-alive2-mcp": {
      "command": "docker",
      "args": [
        "run",
        "--rm",
        "-i",
        "ghcr.io/phongndo/alive2-mcp:0.1.2"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "phongndo-alive2-mcp": {
      "command": "docker",
      "args": [
        "run",
        "--rm",
        "-i",
        "ghcr.io/phongndo/alive2-mcp:0.1.2"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add phongndo-alive2-mcp -- docker run --rm -i ghcr.io/phongndo/alive2-mcp:0.1.2
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "phongndo-alive2-mcp": {
      "type": "local",
      "command": [
        "docker",
        "run",
        "--rm",
        "-i",
        "ghcr.io/phongndo/alive2-mcp:0.1.2"
      ],
      "enabled": true
    }
  }
}
```

### Hermes

```yaml
mcp_servers:
  phongndo-alive2-mcp:
    command: "docker"
    args: ["run", "--rm", "-i", "ghcr.io/phongndo/alive2-mcp:0.1.2"]
```

### Netclaw

```json
{
  "McpServers": {
    "phongndo-alive2-mcp": {
      "Transport": "stdio",
      "Command": "docker",
      "Arguments": [
        "run",
        "--rm",
        "-i",
        "ghcr.io/phongndo/alive2-mcp:0.1.2"
      ]
    }
  }
}
```

### Other

```json
{
  "mcpServers": {
    "phongndo-alive2-mcp": {
      "command": "docker",
      "args": [
        "run",
        "--rm",
        "-i",
        "ghcr.io/phongndo/alive2-mcp:0.1.2"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-05 (score 39, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-03 (score 38)

First indexed and scored.

## MCP tools (3)

### `create_link` (~238 tokens)

Create an Alive2 short link

Publish the check as a public alive2.llvm.org/ce/z/... link for an issue or PR, then read it back to confirm it holds the submitted IR. Permanent and public: get the user's agreement first. A src/tgt link holds one function.

Input parameters:

- `function` (string): function to link when src and tgt share several; a pair link holds one
- `opt` (string): opt binary that runs passes, e.g. your patched build; 'upstream' runs them in trunk LLVM on alive2.llvm.org. Default: the server's -opt flag, else upstream
- `passes` (string): instead of tgt: a -passes pipeline that turns src into tgt, e.g. gvn or instcombine
- `src` (string): source module as LLVM IR text (or use src_file)
- `src_file` (string): path to the source .ll file; relative paths resolve against the server's working directory
- `tgt` (string): transformed module as LLVM IR text; functions are matched to src by name
- `tgt_file` (string): path to the transformed .ll file

Output parameters:

- `functions` (null|array)
- `url` (string)
- `verdict` (string): what the link will show

### `get_link` (~100 tokens)

Read an Alive2 short link

Fetch the IR and options stored in an alive2.llvm.org/ce/z/... link, such as one from an LLVM issue, and optionally re-run its check.

Input parameters:

- `link` (string, required): an alive2.llvm.org/ce/z/... URL or its id
- `max_detail_lines` (integer): cap on each counterexample's lines (default 40)
- `verify` (boolean): also run the link's check again on the website

Output parameters:

- `functions` (null|array)
- `options` (string): stored alive-tv arguments
- `passes` (string): the --passes pipeline, if the link runs one
- `source` (string): the stored IR; pair links hold @src and @tgt
- `verdict` (string)

### `verify` (~295 tokens)

Verify an LLVM IR transformation with Alive2

Prove or refute that tgt refines src, per function. Give tgt directly, or passes to produce it with opt (your patched build) or opt=upstream (trunk LLVM). Returns each function's verdict and, when not correct, the counterexample.

Input parameters:

- `backend` (string): auto (default: local alive-tv if configured, else web), local, or web
- `include_tgt` (boolean): also return the tgt module that opt produced
- `max_detail_lines` (integer): cap on each counterexample's lines (default 40)
- `opt` (string): opt binary that runs passes, e.g. your patched build; 'upstream' runs them in trunk LLVM on alive2.llvm.org. Default: the server's -opt flag, else upstream
- `passes` (string): instead of tgt: a -passes pipeline that turns src into tgt, e.g. gvn or instcombine
- `smt_timeout` (integer): seconds per SMT query (default 10)
- `src` (string): source module as LLVM IR text (or use src_file)
- `src_file` (string): path to the source .ll file; relative paths resolve against the server's working directory
- `tgt` (string): transformed module as LLVM IR text; functions are matched to src by name
- `tgt_file` (string): path to the transformed .ll file

Output parameters:

- `backend` (string): local or web
- `functions` (null|array)
- `tgt` (string)
- `tgt_source` (string): where tgt came from
- `verdict` (string): worst verdict across functions

## Diagnostics

Captured diagnostic sections: Provenance. The full working is on the page: https://verifymcp.io/servers/phongndo-alive2-mcp/ghcr-io-phongndo-alive2-mcp#diagnostics

## Score history

- 2026-11-05: 39
- 2026-11-04: 38
- 2026-11-03: 38

## Common questions

### What is the Alive2 MCP server?

Alive2 is an MCP server listed in the public MCP registry as io.github.phongndo/alive2-mcp. Prove or refute LLVM IR transformations with Alive2, and read or create alive2.llvm.org links. This page covers its container image (ghcr.io/phongndo/alive2-mcp).

### Is the Alive2 MCP server safe to use?

Alive2 scores 39 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Alive2 MCP server expose?

Alive2 exposes 3 tools: create_link, get_link, verify. Their descriptions and schemas cost roughly 633 tokens of context every time the server is loaded.

### Is the Alive2 MCP server still maintained?

Alive2 is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the Alive2 MCP server under?

Alive2 declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- GitHub Container Registry: https://ghcr.io/phongndo/alive2-mcp
- Repository: https://github.com/phongndo/alive2-mcp
- Changelog RSS feed: https://verifymcp.io/servers/phongndo-alive2-mcp/ghcr-io-phongndo-alive2-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/phongndo-alive2-mcp/ghcr-io-phongndo-alive2-mcp.json
- HTML version of this page: https://verifymcp.io/servers/phongndo-alive2-mcp/ghcr-io-phongndo-alive2-mcp