# Vellium & Co Testing Lab (remote · velliumandco.com)

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

- Trust score: 64/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-18

## Components

- remote · `velliumandco.com`: 64/100 (this document), [markdown](https://verifymcp.io/servers/com-velliumandco-lab/velliumandco.md), [page](https://verifymcp.io/servers/com-velliumandco-lab/velliumandco)

## Channel facts

- Endpoint: `https://velliumandco.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-18.

- **Endpoint Security**: 57/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 9 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 62/100
  - AI-judged instruction clarity (fair).
  - Tool/resource definitions use about 806 tokens (~89/item across 9 items; 9 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 20/100
  - Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 87/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 61% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 9 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 10 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the Vellium & Co Testing Lab MCP server?

Vellium & Co Testing Lab is a hosted endpoint at https://velliumandco.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http com-velliumandco-lab 'https://velliumandco.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-velliumandco-lab": {
      "url": "https://velliumandco.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-velliumandco-lab": {
      "type": "http",
      "url": "https://velliumandco.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-velliumandco-lab]
url = "https://velliumandco.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-velliumandco-lab": {
      "type": "remote",
      "url": "https://velliumandco.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-velliumandco-lab --url 'https://velliumandco.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-velliumandco-lab:
    url: "https://velliumandco.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-velliumandco-lab": {
      "Transport": "http",
      "Url": "https://velliumandco.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-velliumandco-lab -t streamable-http -u 'https://velliumandco.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-velliumandco-lab": {
      "type": "http",
      "url": "https://velliumandco.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-18 (score 64, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-16 (score 63, +11)

- [security improvement] Transport: fail → pass

### 2026-10-15 (score 52, −10)

- [security regression] Transport: pass → fail

### 2026-10-14 (score 62, +1)

- [security] Tool “find_route” rewrote its description, which is the text the model reads
- [cosmetic] “find_route” added an optional parameter “detail”

### 2026-10-13 (score 61, +1)

- [functional regression] Schema quality: 75 → 85
- [functional improvement] Tool coverage: 50% → 59%
- [functional improvement] Stability: unverified → 0.03
- [functional] New tool “find_route”
- [cosmetic] “list_websites” added an optional parameter “cursor”
- [cosmetic] “list_websites” added an optional parameter “detail”
- [cosmetic] “list_websites” added an optional parameter “limit”

### 2026-10-12 (score 60)

First indexed and scored.

## MCP tools (9)

### `search_sellers` (~223 tokens)

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

Input parameters:

- `answering` (boolean)
- `category` (string, required): category slug or its name in any of 19 languages, e.g. crypto-prices, 加密货币价格, 暗号資産の価格, cotización cripto (see list_categories)
- `cursor` (string)
- `limit` (integer)
- `max_price` (number): max USDC per call
- `min_accuracy` (number): keep sellers whose 95% range of correct paid answers starts at or above this share (0 to 1)
- `min_buyers` (integer)
- `q` (string): text to match in name or address
- `sort` (string): accuracy ranks by the low end of the 95% range of paid answers judged correct
- `tools_honoured` (boolean): AI chat sellers only: keep those whose checked calls passed an agent's tools to the model and never dropped them

### `check_seller` (~65 tokens)

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).

Input parameters:

- `id` (string)
- `resource` (string): the seller's URL

### `sellers_on_domain` (~32 tokens)

Every paid seller we check on one host.

Input parameters:

- `domain` (string, required)
- `limit` (integer)

### `list_categories` (~44 tokens)

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

Input parameters:

- `lang` (string): language for category names

### `check_website` (~51 tokens)

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

Input parameters:

- `domain` (string, required): e.g. walmart.com

### `batch` (~41 tokens)

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

Input parameters:

- `sellers` (array)
- `websites` (array)

### `changes` (~30 tokens)

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

Input parameters:

- `since` (string): YYYY-MM-DD

### `find_route` (~153 tokens)

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.

Input parameters:

- `country` (string): optional ISO 3166 two-letter country code to prefer sources for that country, e.g. GB, US, DE
- `detail` (string): full = also the paid sellers, registry-listed sources and other sources (a strong match otherwise returns the route alone)
- `q` (string, required): what you need, in plain words

### `list_websites` (~140 tokens)

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).

Input parameters:

- `cursor` (string): next_cursor from the last page
- `detail` (string): full = per-agent tables for every site (else counts; check_website has the tables)
- `limit` (integer): default 40
- `market` (string)
- `plain_agent` (string)
- `prices` (string): price honesty on product, event or stay pages: keep sites with at least one page in this state

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-velliumandco-lab/velliumandco#diagnostics

## Score history

- 2026-10-18: 64
- 2026-10-17: 63
- 2026-10-16: 63
- 2026-10-15: 52
- 2026-10-14: 62
- 2026-10-13: 61
- 2026-10-12: 60

## Common questions

### What is the Vellium & Co Testing Lab MCP server?

Vellium & Co Testing Lab is an MCP server listed in the public MCP registry as com.velliumandco/lab. Independent checks of paid x402 data sellers and of AI-agent access to shopping and travel sites. This page covers its hosted endpoint (https://velliumandco.com/mcp).

### Is the Vellium & Co Testing Lab MCP server safe to use?

Vellium & Co Testing Lab scores 64 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Vellium & Co Testing Lab MCP server expose?

Vellium & Co Testing Lab exposes 9 tools: search_sellers, check_seller, sellers_on_domain, list_categories, check_website, and 4 more. Their descriptions and schemas cost roughly 779 tokens of context every time the server is loaded.

### Does the Vellium & Co Testing Lab MCP server require authentication?

No. We connected to Vellium & Co Testing Lab without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Vellium & Co Testing Lab MCP server still maintained?

Vellium & Co Testing Lab is still listed as active in the MCP registry. We last reached this channel on 18 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://velliumandco.com/mcp
- Website: https://velliumandco.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-velliumandco-lab/velliumandco.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-velliumandco-lab/velliumandco.json
- HTML version of this page: https://verifymcp.io/servers/com-velliumandco-lab/velliumandco