Vellium & Co Testing Lab

com.velliumandcoPublished by velliumandco.comOfficial publisherv1.0.0Updated Oct 24, 2026

Independent checks of paid x402 data sellers and of AI-agent access to shopping and travel sites

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingBusiness & Commerce

Overview

AI-generated overview

A remote MCP server that lets an assistant look up independent checks of paid x402 data sellers and of whether AI agents can access shopping and travel websites

What you can do
Search and browse paid x402 data sellers by category, host or domain, and list every service category with seller and buyer counts in a chosen language. Check a single seller's latest independent result: availability, price, buyers, and whether its paid answers match an independent record. Check whether a website is usable by AI agents, including plain-agent access, robots rules, llms.txt and history, and list rated websites filtered by market, access outcome or price honesty. Run batch checks of up to 25 sellers and 25 websites, and see what changed since a given day to keep a local copy in sync. Find a route to a job in plain words, returning the best tested free official source with its
When to use it
Use it before paying an x402 data seller, when you need to know whether a shopping or travel site is reachable by an agent, or when you want a tested free official source for a data question instead of trial and error.
Requirements
A remote streamable HTTP endpoint; no packages, environment variables or headers are declared. No authentication is declared.
Before you install
The server reports on paid sellers and prices; it does not itself appear to make payments, but results may steer you toward paying third parties. Checks and ratings are the provider's own independent assessments and may change over time.

Installation

In SourceWeft

  1. Open Vellium & Co Testing Lab in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.velliumandco%2Flab/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "vellium-co-testing-lab": {
      "type": "http",
      "url": "https://velliumandco.com/mcp"
    }
  }
}

Tools

9

search_sellers

Find paid x402 data services AI agents can buy, inside one category, ranked. Use before paying any seller.

Parametersqsortlimitcursorcategoryrequiredansweringmax_pricemin_buyersmin_accuracytools_honoured

check_seller

Our latest independent check of one paid seller, by its address (any spelling) or id: answering, price, buyers, and its paid answers checked against an independent record (with proof).

Parametersidresource

sellers_on_domain

Every paid seller we check on one host.

Parameterslimitdomainrequired

list_categories

Every category of paid service agents buy, with sellers, buyers and how we check it; names in your language with lang.

Parameterslang

check_website

Can AI agents use this shopping or travel website? Plain-agent access, each AI agent at the door, robots rules, llms.txt, history.

Parametersdomainrequired

batch

Check up to 25 sellers and 25 websites in one call (cheapest for many checks).

Parameterssellerswebsites

changes

What changed since a day — keep a local copy in sync.

Parameterssince

find_route

Where to go for a job, before you spend tokens on trial and error: the best tested free official source with its exact call and how much it returns (and a fallback). Ask in plain words, e.g. 'UK company directors', 'Apple revenue', 'EU gas storage'. detail=full adds the paid sellers we rate and other sources.

Parametersqrequireddetailcountry

list_websites

Rated websites, filtered by market (e.g. 'United States', 'Japan'), plain-agent outcome (open, blocked, timeout) or price honesty (does the price agents read match what people see).

Parameterslimitcursordetailmarketpricesplain_agent

Version history

1
  1. v1.0.0LatestOct 12, 2026

Score

72% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts

    Publish an icon in the registry entry.

  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.