wasm-mcp

A read-only, deterministic MCP server that provides structured access to the WebAssembly specification. It allows AI agents to look up instructions, types, sections, and proposals via tools like instruction_get, spec_search, and section_get. Data is SHA-pinned from the WebAssembly/spec repository, ensuring consistent outputs without network requests at runtime. It supports stdio and HTTP transports.

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Package and access

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

Community listingLocal stdioSource reviewed; not executedPublished by xyzzy_labs

Vendor documentation

What you can do with it

Look up WebAssembly instruction details by mnemonic or opcode
Search the WebAssembly specification text for specific clauses
Retrieve type definitions and value type catalogs
List and filter WebAssembly proposals by status or phase

Source and maintenance

Community listingRegistry 0.2.16

mcp-registry: io.github.xyzzylabs/wasm-mcp@0.2.16 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:59 PM UTC

Packages and installation

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

wasm-mcp 0.2.16

npm

wasm-mcp package definition

{
  "version": "0.2.16",
  "transport": "stdio",
  "identifier": "wasm-mcp",
  "registryType": "npm"
}

Tools

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

No tool definitions available.

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": {
    "wasm-mcp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "wasm-mcp@0.2.16"
      ]
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "wasm-mcp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "wasm-mcp@0.2.16"
      ]
    }
  }
}

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": {
    "wasm-mcp-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "wasm-mcp@0.2.16"
      ]
    }
  }
}

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": {
    "wasm-mcp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "wasm-mcp@0.2.16"
      ]
    }
  }
}

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