L402 Lightning paywall + Depth-of-Identity score gate for MCP. Three tools — `l402_gate_challenge`, `l402_gate_verify`, `l402_gate_score` — let agents pay per-call without accounts: solve a PoW challenge for the free tier, or pay a Lightning invoice (L402) for the paid tier. The
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Ranked by how closely each one matches mcp-l402-gate's job. Prices show each provider's Pro state; entry prices are labelled as such. Unpriced products still belong to the market.
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