diff --git a/directory/mcp-servers.md b/directory/mcp-servers.md
index da92be6..a710e06 100644
--- a/directory/mcp-servers.md
+++ b/directory/mcp-servers.md
@@ -116,3 +116,5 @@ x402-enabled MCP servers. AI agents (Claude, Cursor, any MCP client) can call th
 - [Stockfilm MCP](https://api.stockfilm.com/mcp) — 217,000+ authentic vintage 8mm home movie clips (1930s-1980s) restored in 4K. AI agents search, preview, license archival footage via x402. $10 USDC per clip. 6 tools. ([Docs](https://stockfilm.com/for-ai-agents))
 
 - [Cleared Index MCP](https://clearedindex.com/api/x402/ping) — MCP server (`route_gateway`, check, trust, witness) so agents query attested inventory and route before pay. Default habit: check → route_gateway → pay → witness. `npx -y @n747ai/clearedindex-mcp-server`. ([npm](https://www.npmjs.com/package/@n747ai/clearedindex-mcp-server)) ([Glama](https://glama.ai/mcp/servers/N747AI/clearedindex-mcp)).
+
+- [nano-mcp](https://github.com/dhyabi2/nano-mcp) — MCP server for Nano (XNO): balance and history on any account, sends, and a wrapper that gates a tool behind a 402 and runs it only after the XNO payment is seen on the ledger. stdio and streamable-http.
diff --git a/directory/sdks.md b/directory/sdks.md
index 15471e9..05d3f23 100644
--- a/directory/sdks.md
+++ b/directory/sdks.md
@@ -64,6 +64,8 @@ Client and server-side libraries for building with x402. Start with the official
 - [feeless402](https://pypi.org/project/feeless402/) — Client and merchant server for x402 over the Nano (XNO) rail: CLI pays any x402 v2 endpoint, FastAPI merchant verifies and self-settles without a facilitator (Nano has no gas), includes a read-only remote MCP server. ([GitHub](https://github.com/Feeless402/feeless402))
 - [@x402nano/exact](https://www.npmjs.com/package/@x402nano/exact) — Exact-scheme implementation for fixed-amount Nano (XNO) payments over x402 (registry.npmjs.org/@x402nano/exact, v0.3.0). No facilitator fee; settlement is the single Nano block.
 - [pursekeeper/x402-nano-exact](https://github.com/pursekeeper/x402-nano-exact) — Python implementation of the x402 exact scheme for Nano (XNO): the 402 handshake with exact fixed-amount math, settling face-to-face on the Nano ledger with no facilitator or gas.
+- [nano-invoice](https://github.com/dhyabi2/nano-invoice) — Python library that binds a Nano (XNO) payment to one order: a tagged amount per invoice (Nano has no memo), one block settles one invoice, refunds go to the sender read from the ledger. Stdlib only.
+- [dual-rail](https://github.com/dhyabi2/dual-rail) — Python and Node acceptor that adds a Nano (XNO) settlement leg beside an existing USDC x402 rail: a 402 that names an XNO address and amount is settled against a Nano node, anything else falls through to the existing facilitator.
 
 ### XRPL
 - [xrpl-x402-core](https://pypi.org/project/xrpl-x402-core/) — Wire-level validation with CAIP-2 XRPL identifiers.
diff --git a/directory/tools.md b/directory/tools.md
index 4720b94..07f32e1 100644
--- a/directory/tools.md
+++ b/directory/tools.md
@@ -51,6 +51,7 @@ Development tools, CLI utilities, monitoring, analytics, and CI/CD integrations
 - [ICME Labs](https://docs.icme.io) — Formal verification for AI agent actions. Natural language policies compile to SMT-LIB formal logic, checked by SMT solver. Wrapped in zero knowledge proofs for sub-1s verification. $0.10 USDC on Base.
 - [PaySentry](https://github.com/mkmkkkkk/paysentry) — Control plane for AI agent payments. Spending limits, circuit breakers, anomaly detection, audit trails for x402. npm: `@paysentry/x402`.
 - [Decision Anchor](https://api.decision-anchor.com) — External anchoring layer for agent payments and delegation. Records what was authorized, when, at what scope — before x402 payment execution. Content-blind.
+- [proof-agent-skill](https://github.com/dhyabi2/proof-agent-skill) — Agent skill that gives an agent a Nano (XNO) wallet and lets it pay x402 endpoints that settle in XNO.
 
 ---