mcp server
wasm-mcp
Read-only MCP server for the WebAssembly spec: instructions, types, sections, search, proposals.
Description as published by the maintainer. Source
- version 0.2.16
- active
- retrieval
active — Registry entry last updated 2026-07-11. Dashed tags are derived by ZBS Index from the published description, not stated by the maintainer.
What this server can do
9 functions, named and described by the server itself. Parameter names are shown because they say more about what a function does than its name usually does.
instruction_get(opcode, mnemonic)- 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` when it never traps).
instruction_list(prefix, can_trap, category, introduced_in)- 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(limit, query)- Ranked free-text search across instruction mnemonics, categories, and opcode hex. Returns hits with a `matched_on` field. Required: query.
proposal_list(phase, status, affects, champion, contains)- 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`.
section_get(id, spec)- 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. Required: id.
section_list(path, spec, max_level, titled_only, anchor_prefix)- 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(spec, limit, query)- 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. Required: query.
spec_version- Return this server's package version plus the pinned upstream commit SHA(s) the bundled data was indexed from.
type_get(name)- Look up a value type (`i32`, `funcref`, `v128`, …) or type form (`functype`, `limits`, `memtype`, …): classification, sibling members, defining clause prose, formal refs, and URL. Required: name.
Last successful function declaration observed on . Source: https://mcp.xyzzylabs.ai/wasm/mcp. We list what the server declared; we do not call any of these functions.
Endpoint status observed on . Source: https://mcp.xyzzylabs.ai/wasm/mcp.
Signals
These are separate measurements of different things. They are deliberately not combined into one score, because a popularity number that mixes website traffic with saves and stars cannot be checked or acted on.
| Signal | Value | What it measures | Window | Observed | Source |
|---|---|---|---|---|---|
| Latest published version | 0.2.16 | Latest version string the maintainer published to the registry. | as of fetch | Model Context Protocol | |
| Registry record last updated | 2026-07-11 | When the registry record was last updated by its maintainer. | point in time | Model Context Protocol | |
| First listed in the MCP Registry | 2026-07-11 | Date this server was first published to the official MCP Registry. Not a usage or quality measure. | point in time | Model Context Protocol | |
| mcp tools declared | 9 tools | Number of functions the server itself declared when asked to list them. This is what the server offers an agent, not a measure of how well any of them work. | as of probe | mcp.xyzzylabs.ai | |
| mcp endpoint status | ok | The server listed 9 functions when asked. | as of probe | mcp.xyzzylabs.ai |
Where to get it
Also from xyzzylabs
-
tc39-mcp
Independent MCP server for the TC39 specs (ECMA-262 + ECMA-402): clauses, search, diffs, history.
This record as data
Every field on this page, with its source and observation date, is in the catalog JSON. Fetch the whole kind at once instead of parsing this HTML.
GET /api/v1/entries/mcp_server.json