diff --git a/README.md b/README.md
index f2fbebb..dba84ed 100644
--- a/README.md
+++ b/README.md
@@ -601,6 +601,11 @@ and more.
 - **[OAK](https://oak.community)**: OAK is a community currency for the People
   of Oakland.
 
+- **[Signet](https://signet.sebayaki.com)**: Signet is an onchain advertising
+  platform on Base where users and AI agents can purchase spotlight ads with
+  USDC using the x402 payment protocol. Open-source CLI available for agent
+  integration.
+
 - **[Tally](https://www.tally.xyz)**: Tally powers the largest DAOs in the
   Ethereum ecosystem. With Tally, you can decentralize your Protocol, project,
   L2 and more. Build on Tally for a robust decentralized ecosystem of tooling.