diff --git a/packages/server/src/routes/grants.test.ts b/packages/server/src/routes/grants.test.ts
index b7836e8c..6bc3cbb9 100644
--- a/packages/server/src/routes/grants.test.ts
+++ b/packages/server/src/routes/grants.test.ts
@@ -447,3 +447,78 @@ describe("POST /", () => {
     expect(grantPayload.nonce).toBe(42);
   });
 });
+
+describe("DELETE /:grantId", () => {
+  const VALID_GRANT_ID =
+    "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
+
+  async function deleteWithOwnerAuth(
+    app: ReturnType<typeof grantsRoutes>,
+    grantId: string,
+  ) {
+    const auth = await buildWeb3SignedHeader({
+      wallet: owner,
+      aud: SERVER_ORIGIN,
+      method: "DELETE",
+      uri: `/${grantId}`,
+      bodyHash: "",
+    });
+    return app.request(`/${grantId}`, {
+      method: "DELETE",
+      headers: { authorization: auth },
+    });
+  }
+
+  it("revokes grant via gateway and returns { status: 'revoked', grantId }", async () => {
+    const mockGateway = createMockGateway();
+    const mockSigner = createMockServerSigner();
+
+    const app = createApp({ gateway: mockGateway, serverSigner: mockSigner });
+    const res = await deleteWithOwnerAuth(app, VALID_GRANT_ID);
+
+    expect(res.status).toBe(200);
+    const json = await res.json();
+    expect(json.status).toBe("revoked");
+    expect(json.grantId).toBe(VALID_GRANT_ID);
+
+    expect(mockSigner.signGrantRevocation).toHaveBeenCalledWith({
+      grantorAddress: owner.address,
+      grantId: VALID_GRANT_ID,
+    });
+    expect(mockGateway.revokeGrant).toHaveBeenCalledWith({
+      grantId: VALID_GRANT_ID,
+      grantorAddress: owner.address,
+      signature: "0xrevokesig",
+    });
+  });
+
+  it("returns 502 on gateway error", async () => {
+    const mockGateway = createMockGateway();
+    vi.mocked(mockGateway.revokeGrant).mockRejectedValue(
+      new Error("gateway down"),
+    );
+
+    const app = createApp({ gateway: mockGateway });
+    const res = await deleteWithOwnerAuth(app, VALID_GRANT_ID);
+
+    expect(res.status).toBe(502);
+    const json = await res.json();
+    expect(json.error.errorCode).toBe("GATEWAY_ERROR");
+  });
+
+  it("returns 500 when serverSigner is not configured", async () => {
+    const app = grantsRoutes({
+      logger,
+      gateway: createMockGateway(),
+      serverOwner: owner.address,
+      serverOrigin: SERVER_ORIGIN,
+      // serverSigner intentionally omitted
+    });
+
+    const res = await deleteWithOwnerAuth(app, VALID_GRANT_ID);
+
+    expect(res.status).toBe(500);
+    const json = await res.json();
+    expect(json.error.errorCode).toBe("SERVER_SIGNER_NOT_CONFIGURED");
+  });
+});
diff --git a/packages/server/src/routes/grants.ts b/packages/server/src/routes/grants.ts
index e924bc70..6495f1a4 100644
--- a/packages/server/src/routes/grants.ts
+++ b/packages/server/src/routes/grants.ts
@@ -1,5 +1,5 @@
 /**
- * Grants routes — GET / (owner), POST / (create grant), POST /verify (public).
+ * Grants routes — GET / (owner), POST / (create grant), DELETE /:grantId (revoke), POST /verify (public).
  */
 
 import { Hono } from "hono";
@@ -218,6 +218,91 @@ export function grantsRoutes(deps: GrantsRouteDeps): Hono {
     return c.json({ grantId: result.grantId }, 201);
   });
 
+  // DELETE /:grantId — revoke a grant (owner-only).
+  // Signs GrantRevocation EIP-712 with serverSigner (delegated) and submits to gateway.
+  app.delete("/:grantId", web3Auth, ownerCheck, async (c) => {
+    if (!deps.serverOwner) {
+      return c.json(
+        {
+          error: {
+            code: 500,
+            errorCode: "SERVER_NOT_CONFIGURED",
+            message:
+              "Server owner address not configured. Set VANA_MASTER_KEY_SIGNATURE environment variable.",
+          },
+        },
+        500,
+      );
+    }
+    if (!deps.serverSigner) {
+      return c.json(
+        {
+          error: {
+            code: 500,
+            errorCode: "SERVER_SIGNER_NOT_CONFIGURED",
+            message:
+              "Server signer not configured. Set VANA_MASTER_KEY_SIGNATURE environment variable.",
+          },
+        },
+        500,
+      );
+    }
+
+    const grantId = c.req.param("grantId");
+    if (!grantId || typeof grantId !== "string") {
+      return c.json(
+        { error: { code: 400, message: "Missing grantId parameter" } },
+        400,
+      );
+    }
+
+    // Sign EIP-712 GrantRevocation
+    let signature: `0x${string}`;
+    try {
+      signature = await deps.serverSigner.signGrantRevocation({
+        grantorAddress: deps.serverOwner,
+        grantId: grantId as `0x${string}`,
+      });
+    } catch (err) {
+      deps.logger.error({ err, grantId }, "Grant revocation signing failed");
+      return c.json(
+        {
+          error: {
+            code: 500,
+            errorCode: "GRANT_REVOCATION_SIGN_FAILED",
+            message: "Failed to sign grant revocation",
+          },
+        },
+        500,
+      );
+    }
+
+    // Submit to Gateway
+    try {
+      await deps.gateway.revokeGrant({
+        grantId,
+        grantorAddress: deps.serverOwner,
+        signature,
+      });
+    } catch (err) {
+      deps.logger.error({ err, grantId }, "Gateway grant revocation failed");
+      const message = err instanceof Error ? err.message : String(err);
+      return c.json(
+        {
+          error: {
+            code: 502,
+            errorCode: "GATEWAY_ERROR",
+            message: `Gateway grant revocation failed: ${message}`,
+          },
+        },
+        502,
+      );
+    }
+
+    deps.logger.info({ grantId }, "Grant revoked");
+    return c.json({ status: "revoked", grantId });
+  });
+
   // POST /verify — public endpoint, no auth required
   app.post("/verify", async (c) => {
     let body: unknown;