Developers and agents

Vibe Radar for AI agents

The site’s data (prices in 9 currencies, verdicts, alternatives, team cost and price changes) through an MCP server, a REST API and WebMCP in the browser.

MCP

Add it as a remote server in Claude, ChatGPT, Cursor or any MCP client. Works without a key, with an hourly limit.

claude mcp add --transport http viberadar https://viberadar.si/mcp

JSON config (clients that accept headers):

{
  "mcpServers": {
    "viberadar": {
      "url": "https://viberadar.si/mcp",
      "headers": {
        "Authorization": "Bearer br_live_…"
      }
    }
  }
}

REST · OpenAPI

Every tool is also a REST endpoint: GET with URL parameters or POST with JSON.

curl "https://viberadar.si/api/v1/search_apps?query=meeting%20notes&currency=EUR&limit=5"

openapi.json llms.txt mcp.json notion.md

WebMCP

In browsers with WebMCP, pages register the tools for the agent that is browsing, including actions on the visitor’s list.

save_to_list · remove_from_list · get_my_list · set_currency

Limits

Without a key: 60 calls per hour per IP. Business plan: 10,000 calls per month with your key.

Plans and pricing →

Available tools

search_apps: Search the Vibe Radar catalog of ~1,100 SaaS apps by name, description or category. Filter by verdict (yes = rebuildable with an AI agent in one session, kinda = with trade-offs, no = better to subscribe) and monthly USD price, sort by price. Returns apps with price, verdict and page URL.
get_app: Everything Vibe Radar knows about one app: verdict and reasoning, what you lose by rebuilding, requirements, all plans with monthly/annual prices and limits, free tier, hidden costs, free alternatives, price history, official pricing URL.
compare_apps: Compare 2 to 4 apps side by side: monthly and yearly cost, billing model, free tier, extra costs, rebuild verdict and free alternatives. Says which is cheapest per year and by how much.
team_cost: Cheapest apps in a category for a team of N people, reading each plan table (per-user vs per-workspace prices, monthly vs annual billing, user caps, extra-seat prices). Returns the cheapest plan per app sorted by yearly cost.
stack_savings: What a list of apps costs per month and per year, and how much switching each paid app to its best free or open-source alternative would save.
price_changes: Confirmed vendor price changes (same plan, same billing period), newest first, with the source of each check.
convert_price: Convert a USD amount to another currency with the day’s reference rate (ECB, or Banco Central do Brasil PTAX for BRL). Optionally adds Brazil’s 3.5% IOF on card purchases.
build_vs_buy: Estimate whether building your own version of an app with an AI coding agent pays off versus subscribing, over 12–36 months. Uses the research’s time estimate and requirements as defaults; every number can be overridden.
list_categories: All catalog categories with slug, localized name and number of apps.