diff --git a/lib/api/messages.js b/lib/api/messages.js
index 41fdddd5..d7bd495e 100644
--- a/lib/api/messages.js
+++ b/lib/api/messages.js
@@ -139,7 +139,8 @@ module.exports = (db, server, messageHandler, userHandler, storageHandler, setti
                             messageData.bimi = {
                                 certified: bimiData.type === 'authority',
                                 url: bimiData.url,
-                                image: `data:image/svg+xml;base64,${bimiData.content.toString('base64')}`
+                                image: `data:image/svg+xml;base64,${bimiData.content.toString('base64')}`,
+                                type: bimiData.type === 'authority' ? bimiData.vmc?.type || 'VMC' : undefined
                             };
                         }
                         delete messageData.verificationResults.bimi;
@@ -1112,7 +1113,8 @@ module.exports = (db, server, messageHandler, userHandler, storageHandler, setti
                             bimi: Joi.object({
                                 certified: booleanSchema.description('If true, then this logo is from a VMC file'),
                                 url: Joi.string().description('URL of the resource the logo was retrieved from'),
-                                image: Joi.string().description('Data URL for the SVG image')
+                                image: Joi.string().description('Data URL for the SVG image'),
+                                type: Joi.string().valid('VMC', 'CMC').description('Certificate type (only for VMC files)')
                             }).description('BIMI logo info. If logo validation failed in any way, then this property is not set'),
                             contentType: Joi.object({
                                 value: Joi.string().required().description('MIME type of the message, eg. "multipart/mixed'),
@@ -1372,7 +1374,8 @@ module.exports = (db, server, messageHandler, userHandler, storageHandler, setti
                             response.bimi = {
                                 certified: bimiData.type === 'authority',
                                 url: bimiData.url,
-                                image: `data:image/svg+xml;base64,${bimiData.content.toString('base64')}`
+                                image: `data:image/svg+xml;base64,${bimiData.content.toString('base64')}`,
+                                type: bimiData.type === 'authority' ? bimiData.vmc?.type || 'VMC' : undefined
                             };
                         }
                     } catch (err) {