MCP server

What Agents Buy Official

com.whatagentsbuy/whatagentsbuy

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Independent measured reviews of x402 API sellers: pre-payment verdicts and accuracy grades.

Website Source

At a glance

Type

MCP server

Publisher

whatagentsbuy.com (verified by the MCP Registry)

Status

Working at last check

Tools

7

Token cost

About 1,573 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http whatagentsbuy https://whatagentsbuy.com/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.whatagentsbuy]
url = "https://whatagentsbuy.com/mcp"

Gemini CLI

{"mcpServers":{"whatagentsbuy":{"httpUrl":"https://whatagentsbuy.com/mcp"}}}

Cursor

{"mcpServers":{"whatagentsbuy":{"url":"https://whatagentsbuy.com/mcp"}}}

VS Code

{"servers":{"whatagentsbuy":{"type":"http","url":"https://whatagentsbuy.com/mcp"}}}

Antigravity

agy mcp add whatagentsbuy https://whatagentsbuy.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"whatagentsbuy","server_url":"https://whatagentsbuy.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"whatagentsbuy","server_url":"https://whatagentsbuy.com/mcp"}

Tools

• check_before_paying ~339 tokens
  USE WHEN your agent is about to pay an x402 API and you want to know if it is safe and worth it. Returns one verdict for a URL or host in the `verdict` field (gate on that; `light` is the same decision as a colour, for display): CLEAR (nothing alarming), HOLD (pay but resolve the reasons), ABORT (do
• find_api ~367 tokens
  USE WHEN you need an API that does something and want payable options. Searches the whole x402 market for what you describe and returns a ranked, pre-vetted shortlist, proven-accurate sellers first, then payment-safety, then price. Covers every reachable endpoint, not just ones we have bought from.
• known_payment_traps ~119 tokens
  USE WHEN writing payment code, or before trusting an unfamiliar seller. The field notes: each is a specific way an agent paying an API loses money or is misled, what it cost to learn, and what to do instead. (Formerly named list_traps.)
• look_up_seller ~192 tokens
  USE WHEN you have a specific seller host and want its full track record. Returns every grade earned by actually paying it, what was quoted versus charged, whether goods arrived, its settlement volume, and its Organic Demand Score with the demand-shape read (is the volume real independent demand, or
• market_size ~152 tokens
  USE WHEN asked how big x402 is, whether it is growing, or what settled recently. Returns both what actually settled on Base over the last day (from chain logs, per tracked seller) and the live market pulse (24h volume and payments with day-over-day change, a 7-day series, and stablecoin circulation)
• rank_by_accuracy ~216 tokens
  USE WHEN a category has an objective right answer (crypto-price, stock-price, fx-rate, gas-price, wallet-balance, weather) and you want the sellers we PAID ranked by how close their returned value was to a primary source that cannot be a reseller (exchange median, chain balanceOf, ECB rates, FMP quo
• rank_sellers ~188 tokens
  USE WHEN you want a ranked list of sellers across the market. by='revenue' ranks by raw USDC received (who is busy); by='real_demand' ranks by Organic Demand Score (whose money comes from many independent wallets rather than one wallet supplying almost all of it). The two disagree often, and the dis

Browse

• Payments
• Weather
• Crypto and blockchains

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