Build an agent with Tool Plaza

Tool Plaza exposes 196+ utility skills through A2A JSON-RPC and a REST execute API. Most skills run server-side helpers; timers and canvas tools are browser-only.

Quick start

1. Discover skills — GET /.well-known/agent-card.json or GET /api/a2a/skills?q=base64
2. Load schema — GET /api/helpers/{skillId} (exports, example args, pricing)
3. Execute — POST /api/helpers/execute or A2A message/send

REST example

curl -sS -X POST https://toolplaza.app/api/helpers/execute \
  -H 'Content-Type: application/json' \
  -d '{"skillId":"base64__from-text-to-base64","export":"encodeTextToBase64","args":["Hello"]}'

A2A JSON-RPC example

Send POST /api/a2a with:

{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "message/send",
  "params": {
    "message": {
      "messageId": "uuid",
      "role": "user",
      "parts": [{ "kind": "text", "text": "ignored" }]
    },
    "metadata": {
      "toolplaza": {
        "skillId": "ascii__from-text-to-ascii-codes",
        "export": "encodeTextToAsciiCodes",
        "args": ["Hello"]
      }
    }
  }
}

Flat metadata is also accepted: metadata.skill, metadata.export, metadata.args (array or object).

Discovery endpoints

Rate limits (default)

Privacy

Server-side agent calls log aggregate usage (skillId, outcome) via Google Analytics. Request arguments are not logged. See the Privacy Policy.

MCP

Install the optional MCP server from packages/mcp-server-toolplaza and set TOOLPLAZA_BASE_URL to proxy tools into Cursor or Claude Desktop.