diff --git a/typescript/site/app/ecosystem/partners-data/countersign/metadata.json b/typescript/site/app/ecosystem/partners-data/countersign/metadata.json
new file mode 100644
index 0000000000..13b28b101c
--- /dev/null
+++ b/typescript/site/app/ecosystem/partners-data/countersign/metadata.json
@@ -0,0 +1,7 @@
+{
+  "name": "Countersign",
+  "description": "Spend governance for agents that pay over x402: parse a 402 challenge, check it against policy before paying (caps, allowlists, decoy-resistant asset pinning), pay only on allow — with a sub-second kill switch and a signed audit ledger behind it.",
+  "logoUrl": "/logos/countersign.svg",
+  "websiteUrl": "https://countersign.network/docs/x402.html",
+  "category": "Infrastructure & Tooling"
+}
diff --git a/typescript/site/public/logos/countersign.svg b/typescript/site/public/logos/countersign.svg
new file mode 100644
index 0000000000..d8469f224a
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+++ b/typescript/site/public/logos/countersign.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32"><rect width="32" height="32" rx="7" fill="#07080b"/><path d="M16 6 L25 10 V17 C25 22 21 25.5 16 27 C11 25.5 7 22 7 17 V10 Z" fill="none" stroke="#7c9cff" stroke-width="2"/><path d="M12.5 16.5 l2.5 2.5 l5 -6" fill="none" stroke="#5cf2a9" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/></svg>