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wasm-mcp

io.github.xyzzylabs/wasm-mcp · v0.2.16

No registry update 90+ days

Measured by MCP Station

Last check	Reachable
Checked at	—
Check success 7 / 30 days	—
First-try success 30 days	—
Median response	—
Lookups 30 days	—
Authentication	No auth
MCP version	2024-11-05
Rank score	—
Declared risk	Read-only (all tools declare readOnlyHint)
Capabilities declared	tools
Tool definitions	9 tools · with description 100% · input schema is an object 100% · read/destructive hints 100%

Description written by the publisher, not verified

Read-only MCP server for the WebAssembly spec: instructions, types, sections, search, proposals.

Connect

streamable-http · https://mcp.xyzzylabs.ai/wasm/mcp

claude mcp add --transport http wasm-mcp https://mcp.xyzzylabs.ai/wasm/mcp

{
  "mcpServers": {
    "wasm-mcp": {
      "url": "https://mcp.xyzzylabs.ai/wasm/mcp"
    }
  }
}

Tools as reported by the server

spec_version
Return this server's package version plus the pinned upstream commit SHA(s) the bundled data was indexed from.
instruction_get
Fetch one WebAssembly instruction by mnemonic (`i32.add`) or binary opcode (`0x6a`, multi-byte `0xfd 0x89 0x02`): opcode bytes, category, introducing version, stack type signature, validation/execution anchors + URLs, and `traps` (runtime trap conditions with canonical names; empty + `can_trap:false
instruction_list
Enumerate WebAssembly instructions, filterable by `category`, `introduced_in` (1.0|2.0|3.0), mnemonic `prefix`, and `can_trap` (only trapping / only non-trapping). Rows (incl. `can_trap`) sorted by opcode.
instruction_search
Ranked free-text search across instruction mnemonics, categories, and opcode hex. Returns hits with a `matched_on` field.
type_get
Look up a value type (`i32`, `funcref`, `v128`, …) or type form (`functype`, `limits`, `memtype`, …): classification, sibling members, defining clause prose, formal refs, and URL.
section_get
Fetch one spec clause by id or anchor across `core` / `js-api` / `web-api` (`syntax-numtype`, `valid-unreachable`, `modules`, `streaming-modules`, …): title, prose, cross-references, SpecTec formal refs, and rendered URL.
section_list
Navigate the clause tree of a spec (`core` / `js-api` / `web-api`), filterable by source `path` (`syntax`, `valid`, `exec`, `binary`, `text`, `appendix`), `anchor_prefix`, `titled_only`, and `max_level`.
spec_search
Full-text search across clause anchors, titles, and prose of a spec (`core` / `js-api` / `web-api`). Ranked anchor-exact > title > anchor > prose, with snippets for body matches.
proposal_list
List WebAssembly proposals + phases. Filter by `status` (phase-0…phase-5, finished, inactive), `phase` (0–5), `champion`, `affects` (core|js-api|web-api), or `contains`.

Repository · Website · JSON · Text for agents · Registry updated 2026-07-11