io.github.llmops-pro/paywall-mcp

Is the io.github.llmops-pro/paywall-mcp MCP server down? No. It is up and needs env, probed 2026-10-31.

Lightning-paywall sidecar: wraps any stdio MCP server, requires paid invoices before tool calls.

needs env probed 2026-11-14 · unchanged since 2026-10-31

MCP error -32000: Connection closed
  - PAYWALL_UPSTREAM_ARGS: invalid JSON: Unexpected token 'm', "mcpcost-placeholder" is not valid JSON
  - PAYWALL_DEFAULT_P

Run it: npx -y paywall-mcp@0.1.2 (stdio, probed in a container with the network off)
Host: npmjs.com
Repository: https://github.com/llmops-pro/paywall-mcp
Registry: active, updated 2026-06-12 · registry entry

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The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

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Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.

For the publisher

The server exits because an environment variable is missing. The probe starts the package without secrets. A server that starts without secrets and asks for them on the first tool call is measured.