Typed UI vocabulary for AI agents using the a2ui protocol — 474 atoms an agent composes into real rendered interfaces across web, Google Meet, Apps Script, Google Chat and MCP Apps. MCP server, no signup.
a2uicatalog/a2ui is an MCP server distributed on github, maintained by a2uicatalog, tracked here since July 2026. It has shipped 3 releases and exposes 6 tools. Tools include build_app, encode_url, get_atom_schema, get_ui, list_atoms, validate_payload. Its composite risk grade is D — an inferred review prompt computed from observed signals, not a verdict.
Reading the source raised 2 review prompts — dangerous code and toxic flow (lethal trifecta) — each a pattern worth a human look rather than a finding of fault.
full security breakdown →-
build_app -
encode_url -
get_atom_schema -
get_ui -
list_atoms -
validate_payload
06-13 00:00 07-27 00:00 now
| version | date | src |
|---|---|---|
| v1.0.2 | 2026-07-08 | github |
| v1.0.1 | 2026-07-05 | github |
| v1.0.0 | 2026-07-05 | github |