Lightning-paywall sidecar: wraps any stdio MCP server, requires paid invoices before tool calls.
Connect Runs on your machine
claude mcp add paywall-mcp -e PAYWALL_UPSTREAM_COMMAND=<PAYWALL_UPSTREAM_COMMAND> -e PAYWALL_UPSTREAM_ARGS=<PAYWALL_UPSTREAM_ARGS> -e NWC_CONNECTION_STRING=<NWC_CONNECTION_STRING> -e PAYWALL_DEFAULT_PRICE_SATS=<PAYWALL_DEFAULT_PRICE_SATS> -e PAYWALL_PRICE_MAP=<PAYWALL_PRICE_MAP> -- npx -y [email protected]{
"mcpServers": {
"paywall-mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"PAYWALL_UPSTREAM_COMMAND": "<PAYWALL_UPSTREAM_COMMAND>",
"PAYWALL_UPSTREAM_ARGS": "<PAYWALL_UPSTREAM_ARGS>",
"NWC_CONNECTION_STRING": "<NWC_CONNECTION_STRING>",
"PAYWALL_DEFAULT_PRICE_SATS": "<PAYWALL_DEFAULT_PRICE_SATS>",
"PAYWALL_PRICE_MAP": "<PAYWALL_PRICE_MAP>"
}
}
}
}{
"mcpServers": {
"paywall-mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"PAYWALL_UPSTREAM_COMMAND": "<PAYWALL_UPSTREAM_COMMAND>",
"PAYWALL_UPSTREAM_ARGS": "<PAYWALL_UPSTREAM_ARGS>",
"NWC_CONNECTION_STRING": "<NWC_CONNECTION_STRING>",
"PAYWALL_DEFAULT_PRICE_SATS": "<PAYWALL_DEFAULT_PRICE_SATS>",
"PAYWALL_PRICE_MAP": "<PAYWALL_PRICE_MAP>"
}
}
}
}{
"servers": {
"paywall-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"PAYWALL_UPSTREAM_COMMAND": "<PAYWALL_UPSTREAM_COMMAND>",
"PAYWALL_UPSTREAM_ARGS": "<PAYWALL_UPSTREAM_ARGS>",
"NWC_CONNECTION_STRING": "<NWC_CONNECTION_STRING>",
"PAYWALL_DEFAULT_PRICE_SATS": "<PAYWALL_DEFAULT_PRICE_SATS>",
"PAYWALL_PRICE_MAP": "<PAYWALL_PRICE_MAP>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
PAYWALL_UPSTREAM_COMMANDRequired | Command to spawn the upstream MCP server (e.g. npx) |
PAYWALL_UPSTREAM_ARGSOptional | JSON array of args for the upstream command |
NWC_CONNECTION_STRINGRequired, secret | NWC connection string of the receiving wallet (receive-only recommended) |
PAYWALL_DEFAULT_PRICE_SATSOptional | Default price in sats for tools not in PAYWALL_PRICE_MAP |
PAYWALL_PRICE_MAPOptional | JSON map of tool name to price in sats |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 12 Jun 2026 |
| Last updated | 12 Jun 2026 |
| Registry name | io.github.llmops-pro/paywall-mcp |
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