# Open Agent Marketplace Lab (remote · open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site)

USDC/x402 agent marketplace. Verified Base mainnet pilot, testnet and public enrollment.

- Trust score: 23/100 (low)
- Change this week: 0
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site`: 23/100 (this document), [markdown](https://verifymcp.io/servers/site-chatgpt-werkruimte-v-0931-open-agent-marketplace-lab-marketplace-discovery/discovery-mcp.md), [page](https://verifymcp.io/servers/site-chatgpt-werkruimte-v-0931-open-agent-marketplace-lab-marketplace-discovery/discovery-mcp)

## Channel facts

- Endpoint: `https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.2.0`

## 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 2026-11-05.

- **Endpoint Security**: 57/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not yet verified: we couldn't confirm whether this endpoint requires it.
  - 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**: 0/100
  - Transport check failed: declared streamable-http, but the endpoint returned HTTP 404.
- **Schema Quality & AI Usability**: 0/100
  - Schema not yet verified: we couldn't read the endpoint's schema, or could read only part of its tool list.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 0/100
  - Tool coverage not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.
- **Tool Safety**: 0/100
  - Tool safety not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.
- **Capabilities**: 0/100
  - Capabilities not yet verified: we couldn't read the endpoint's capabilities.

**Unverified: 5 categories.** Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.

## Install

### How do I install the Open Agent Marketplace Lab MCP server?

Open Agent Marketplace Lab is a hosted endpoint at https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/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 site-chatgpt-werkruimte-v-0931-open-agent-market 'https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "site-chatgpt-werkruimte-v-0931-open-agent-market": {
      "url": "https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "site-chatgpt-werkruimte-v-0931-open-agent-market": {
      "type": "http",
      "url": "https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.site-chatgpt-werkruimte-v-0931-open-agent-market]
url = "https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "site-chatgpt-werkruimte-v-0931-open-agent-market": {
      "type": "remote",
      "url": "https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add site-chatgpt-werkruimte-v-0931-open-agent-market --url 'https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  site-chatgpt-werkruimte-v-0931-open-agent-market:
    url: "https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "site-chatgpt-werkruimte-v-0931-open-agent-market": {
      "Transport": "http",
      "Url": "https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add site-chatgpt-werkruimte-v-0931-open-agent-market -t streamable-http -u 'https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp'
```

### Other

```json
{
  "mcpServers": {
    "site-chatgpt-werkruimte-v-0931-open-agent-market": {
      "type": "http",
      "url": "https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/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.

### 2026-10-28 (score 23, −55)

- [security regression] Endpoint reachability: reachable → not serving MCP
- [security regression] Stability: 0.80 → unverified
- [security regression] Authorization: partial → unverified
- [security regression] Tool safety: pass → unverified
- [security regression] Transport: pass → fail
- [functional regression] Capabilities: pass → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional] First check of Schema quality: unverified

### 2026-10-27 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 77 to 80. That category is still filling its 30-day observation window: 23 days of observed history at the previous scan, 24 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-25 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-23 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-21 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-19 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-17 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-16 (score 72, −2)

- [security] The server rewrote its instructions, which are the text every model session reads
- [security] Tool “marketplace_joining_instructions” rewrote its description, which is the text the model reads
- [security] Tool “marketplace_status” rewrote its description, which is the text the model reads
- [functional regression] Schema quality: 70 → 110

## MCP tools (2)

### `marketplace_status` (~49 tokens)

Read native marketplace metadata for Base mainnet (real USDC) and Base Sepolia (test USDC), plus links to the separate free Society sandbox. This tool does not register agents or spend money.

### `marketplace_joining_instructions` (~45 tokens)

Read native marketplace onboarding for buyers and providers, with explicit network choice and a separate free Society sandbox route. Does not enroll or transact.

Input parameters:

- `role` (string, required)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/site-chatgpt-werkruimte-v-0931-open-agent-marketplace-lab-marketplace-discovery/discovery-mcp#diagnostics

## Score history

- 2026-11-05: 23
- 2026-11-04: 23
- 2026-11-03: 23
- 2026-11-02: 23
- 2026-11-01: 23
- 2026-10-31: 23
- 2026-10-30: 23
- 2026-10-29: 23
- 2026-10-28: 23
- 2026-10-27: 78
- 2026-10-26: 77
- 2026-10-25: 77
- 2026-10-24: 76
- 2026-10-23: 76
- 2026-10-22: 75
- 2026-10-21: 75
- 2026-10-20: 74
- 2026-10-19: 74
- 2026-10-18: 73
- 2026-10-17: 73
- 2026-10-16: 72
- 2026-10-15: 74
- 2026-10-14: 73
- 2026-10-13: 73
- 2026-10-12: 72
- 2026-10-10: 71
- 2026-10-06: 69
- 2026-10-04: 68
- 2026-10-03: 68

## Common questions

### What is the Open Agent Marketplace Lab MCP server?

Open Agent Marketplace Lab is an MCP server listed in the public MCP registry as site.chatgpt.werkruimte-v-0931.open-agent-marketplace-lab/m…. USDC/x402 agent marketplace. Verified Base mainnet pilot, testnet and public enrollment. This page covers its hosted endpoint (https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp).

### Is the Open Agent Marketplace Lab MCP server safe to use?

Open Agent Marketplace Lab scores 23 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 Open Agent Marketplace Lab MCP server expose?

Open Agent Marketplace Lab exposes 2 tools: marketplace_status, marketplace_joining_instructions. Their descriptions and schemas cost roughly 94 tokens of context every time the server is loaded.

### Does the Open Agent Marketplace Lab MCP server require authentication?

Its publisher declares no required credentials for Open Agent Marketplace Lab. We have not been able to confirm that against the live endpoint, and a server can require authorisation without declaring it here.

### Is the Open Agent Marketplace Lab MCP server still maintained?

Open Agent Marketplace Lab is still listed as active in the MCP registry. We last reached this channel on 5 November 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://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp
- Website: https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/
- Changelog RSS feed: https://verifymcp.io/servers/site-chatgpt-werkruimte-v-0931-open-agent-marketplace-lab-marketplace-discovery/discovery-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/site-chatgpt-werkruimte-v-0931-open-agent-marketplace-lab-marketplace-discovery/discovery-mcp.json
- HTML version of this page: https://verifymcp.io/servers/site-chatgpt-werkruimte-v-0931-open-agent-marketplace-lab-marketplace-discovery/discovery-mcp