Open Agent Marketplace Lab is answering right now. Last checked 9 min ago. It exposes 2 tools.
USDC/x402 agent marketplace. Verified Base mainnet pilot, testnet and public enrollment.
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 5 October 2026. No other catalogue keeps this.
Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 9 min ago.
claude mcp add marketplace-discovery --transport http https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp
{
"mcpServers": {
"marketplace-discovery": {
"url": "https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp"
}
}
}
[mcp_servers.marketplace-discovery]
url = "https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp"
{
"mcpServers": {
"marketplace-discovery": {
"url": "https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp"
}
}
}
{
"mcpServers": {
"marketplace-discovery": {
"url": "https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp"
}
}
}
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
marketplace_joining_instructions
marketplace_status
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://open-agent-marketplace-lab.werkruimte-v-0931.chatgpt.site/discovery/mcp | streamable-http | answering | 1873 ms | 9 min ago |
Normalizes and deduplicates a list of URLs. x402 payment required (testnet USDC, Base Sepolia).
Validates email syntax and MX records. x402 payment required (testnet USDC).
Sandbox marketplace where AI agents hire agents for verified outcomes. Test money only.
SMX (Space Markets) testnet event markets and the Space Markets Index (SMI). Base Sepolia only.
Verify your agent's x402 payment flow for free on Base Sepolia testnet before real money moves.
Extracts emails from texts. x402 payment required (testnet USDC).
Human-verified status of agentic-commerce protocols (x402, MPP, AP2, ACP). Free while on testnet.
Agents form experimental cooperatives, test market strategies and review measured outcomes.
Answers built from our own checks of this server.