A2UI Atomic Catalog

Connect Remote server

claude mcp add --transport http catalog https://a2uicatalog.ai/mcp

{
  "mcpServers": {
    "catalog": {
      "url": "https://a2uicatalog.ai/mcp"
    }
  }
}

{
  "servers": {
    "catalog": {
      "type": "http",
      "url": "https://a2uicatalog.ai/mcp"
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://a2uicatalog.ai/mcp

Tools 40 found in our last check

• list_catalogs

  List every A2UI catalog with a when-to-use, so you can pick the extension catalogs a surface needs. The base catalog (a2ui-atoms-v1) is always resolved.

• get_catalog

  Return one catalog's atoms (type + one-line description) so you know its vocabulary.

• find_atoms

  Semantic search over the atom catalog: describe the UI piece you need in plain words and get the best-matching atoms, ranked best-first, each with a description and an example need. YOU choose from the list (the first entries are most likely, but check the descriptions), then ca…

• get_atom_schema

  Return the PROP SHAPE (field names + what each field takes) for named atoms. get_catalog tells you an atom EXISTS; this tells you how to fill it. Call this before authoring any atom you have not used before — guessing prop names is the single most common cause of an atom renderi…

• required_catalogs

  Given an A2UI payload, return the resolvable catalog URIs it needs (deterministic — pure function of the atoms).

• build_multi_page_surface

  Build a multi-section A2UI app from raw title+content sections — you never estimate size or decide how to split; each section becomes its own independently-encoded page (no shared hub, so per-page size never grows with page count — genuinely unlimited sections). Returns the firs…

• make_surface_url

  Render an A2UI payload in the CALLER'S OWN environment. Pass renderer_url (your deployed renderer /exec) and get a live URL + the catalogs it declares. Omit renderer_url to get the encoded fragment + BYO guidance. We host nothing and never see your content. NEVER hand-write your…

• preview_url

  Quick DEMO render on the public renderer (ephemeral, nothing stored). Limited to 2 runs per client, then deploy your own renderer and use make_surface_url. Onboarding only — not the workflow. DATA-IN-URL: keep payloads SMALL (URL < ~2000 chars); large payloads make long URLs tha…

• render_surface

  Render an A2UI payload INSIDE the chat as a live interactive view (MCP Apps hosts only — on other hosts this returns the payload as text). No URL, no size ceiling, nothing stored: the payload travels in the tool result and renders in the a2ui_catalog_view. Accepts the blocks dia…

• make_film

  Make a short motion film (a social clip, launch teaser, quote card...) built by the A2UI Design Studio: you choose a template and supply the words; the studio builds the film. Use this instead of composing motion_timeline blocks yourself. It plays inline here and comes with a li…

• sketch_agent_start

  Start a real, live agent_sketchpad drawing: one Gemini call plans a complete picture as an ordered list of SVG strokes, the first stroke renders immediately, and the rest reveal as you call sketch_agent_poll again — a real multi-turn task, not a single one-shot render. MCP Apps…

• sketch_agent_poll

  Continue a sketch_agent_start task: returns every stroke newer than the given cursor (an event log, not a snapshot — nothing is skipped regardless of poll timing) plus the next cursor, reveals the result in-chat the same way render_surface does, and reports whether the drawing i…

• render_ping

  Diagnostic: render a tiny test view in-chat (MCP Apps hosts only). Proves view mounting works independent of the full catalog renderer. Echoes back whatever payload you pass.

• wasm_spike

  Diagnostic (MCP Apps hosts only): mounts a view that instantiates a tiny hand-assembled WebAssembly module, computes per-frame state in it, renders to canvas, and captures arrow-key input -- the same three ingredients a WASM game port would need. Answers whether THIS host permit…

• diagram_studio

  Draw a diagram in-chat with the full Diagram Studio interface (MCP Apps hosts only; it opens fullscreen where the host allows it). YOU write the diagram; nothing is generated server-side and nothing is stored. PREFER `graph`: give vertices (id, label, type start|process|decision…

• amiga

  Open a real, cycle-exact Amiga 500 emulator in-chat (MCP Apps hosts only). Boots straight into AROS, a free open-source environment (no copyrighted Kickstart ROM involved), with a public-domain Amiga game already loaded and running. This is a fixed, self-contained retro-computin…

• distill_document

  Compile a training.md / roadmap markdown document into a live interactive A2UI app — DETERMINISTIC parser, no model involved. Fact sheet: input is MARKDOWN following the training-md contract (frontmatter id/domain/name/source/license + a # Steps section); the text transits to th…

• publish_url

  STORES the payload server-side and returns a SHORT shareable link. Opt-in only: requires acknowledge_storage=true — confirm with the user first that they accept operator-hosted storage (ONE WEEK retention on the public tier, revocable earlier via the returned delete_token; anyon…

• unpublish_url

  Delete a published short link before its TTL using the delete_token returned by publish_url.

• emit_deployment

  🎓 GRADUATE a tested surface into a dedicated, DEPLOYER-ONLY standing app in YOUR OWN Google Apps Script account. Returns a deterministic recipe (config files + clasp ops + least-privilege scopes derived from the atoms + verify) — you run it with your own clasp; nothing runs on o…

• emit_training_runbook

  Build a multi-lesson training/course surface as ONE properly-linked page with real in-app tab navigation between lessons — prefer this over build_multi_page_surface for training/course content specifically: that tool produces N independent pages with NO links between them (you m…

• emit_runbook_surface

  Stamp your content through a DECLARED runbook — a pre-authored, judgment-free surface composition. You supply content only; the runbook supplies the composition (which atoms, how arranged, navigation). DISCOVERY: call with runbook_id only (no content) to get that runbook's input…

• describe_playbook

  Explain a playbook to a HUMAN as a rendered surface: the frame it reads against, the lenses available, and the questions it will ask them. Compiled from the runbook declaration, so it costs nothing and cannot drift from what the stamper enforces. This is NOT emit_runbook_surface…

• open_workspace

  Open the A2UI Workspace — a rendered surface that IS the demo: each tool is introduced by the scenario it answers, then wired to run, then shows what it saved. This tool RENDERS ITSELF: its result carries the view, so call it alone and show the result — do NOT pass it on to rend…

• get_profile

  Read the signed-in reader's saved profile and recent history. Call this BEFORE asking a runbook's `elicit` questions: if a domain or default lens is already saved, CONFIRM it ("reading as: a2ui, generative ui — change?") instead of asking from scratch. Returns available:false on…

• save_profile

  Update the signed-in reader's profile. Only the keys you pass change; pass null to clear one. Save what the reader TOLD you, never what you inferred from one article — a profile that drifts on every reading is worse than no profile, because they stop being able to predict what i…

• save_reading

  Record a stamped surface in the reader's history so it can be compared and reopened later. Call it AFTER emit_runbook_surface, and PASS ITS `payload` — that stores the reading itself rather than a link to it. Silently no-ops when nobody is signed in.

• export_reading

  Export a kept reading as something that outlives this connector. format "html" returns ONE self-contained file — styles inlined, no network, opens in any browser years from now with nothing installed. "url" rebuilds a link against any renderer (yours by preference). "surface" re…

• render_reading_to_slack

  Post a kept reading into Slack as real, native Block Kit — the continuity proof: generate here, save it, and the SAME content reopens in Slack, not a link back to a renderer. Requires the caller's Slack account to already be linked (`/a2ui link` in Slack) and only works on an au…

• list_readings

  The reader's recent stamped surfaces, newest first — what makes "compare this to my last three teardowns" answerable at all. Optionally filter to one runbook. Returns available:false when nobody is signed in.

• delete_reading

  Permanently remove one or more of the reader's saved readings from their History. Takes an array so the Workspace's multi-select can delete a batch in one call rather than one round trip per row. Ids that don't exist (or belong to someone else's history) are silently skipped — t…

• read_article

  Have the catalog's own model (Gemini) read an article through the article_playbook runbook and KEEP the reading in the signed-in reader's history, in one call. For a client with no model of its own (the Android analyser app), or when the reader asks for a Gemini reading. If you…

• deck_schema

  List the slide layouts the PPTX renderer builds (title, bullets, stats, quote, table, media, cta), each field with its limits, the targets, the film-only scenes, and the A2UI atoms that have a slide recipe (payload_atoms). Read this before writing a deck.

• deck_validate

  Check a deck (scene list or A2UI payload) without building it. Returns every error with its slide, field and exact limit, warnings (no speaker notes, no link) and, for a payload, which atoms have no slide recipe. Not rate-limited.

• deck_build

  Build a PowerPoint (.pptx) file from a scene list or an A2UI payload. Deterministic (same input, same bytes), nothing is stored or fetched, text is fitted with real font metrics and the file is linted (overlap, bounds, contrast, alt text). Returns the file as an embedded resourc…

• drawio_open

  Open a diagram you wrote in draw.io (diagrams.net). YOU write the diagram as mxGraph XML, the format draw.io reads; this tool checks it, and returns a link that opens it in the draw.io editor for the person, plus a .drawio file to download (kept for one hour). Nothing is drawn o…

• unlink_slack_account

  Revoke one or more Slack accounts' link to this reader's store, from the Workspace side (the reverse of the Slack-side `/a2ui unlink` command — see slack-compiler/DESIGN-identity.md, "many Slack -> one sub"). Removes that account's ability to post via render_reading_to_slack or…

• wall_calc

  Compute a coursed block/brick wall specification — course and unit counts, weight, cost, mortar bags, a build-time curve across 1-6 builders, and load-bearing/height advisories. Pure arithmetic, no model call: a native-catalogue rebuild of the Gemini Enterprise "Wall Builder" de…

• whoami

  Report who this connection is authenticated as. Answers two SEPARATE questions that are easy to conflate: which APPLICATION is connected (the OAuth client), and which HUMAN authorised it (the signed-in account, when the endpoint is one that can know). The public endpoint is anon…

• identify_model

  CALL THIS FIRST, before any other a2ui-catalog tool, once per session. Declares your own model identity so this response can hand you capability-matched guidance up front — some models need simpler, judgment-free tools; skipping this just means you default to the full toolkit, i…

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