diff --git a/app/components/add-contributor/component.js b/app/components/add-contributor/component.js
index db067b9..96c644a 100644
--- a/app/components/add-contributor/component.js
+++ b/app/components/add-contributor/component.js
@@ -5,31 +5,58 @@ export default Ember.Component.extend({
   id: null,
   realName: null,
   address: null,
+  ipfsHash: null,
+  isCore: true,
 
-  classId: function() {
-    let value = this.get('id');
-    return (Ember.isEmpty(value)) ? null : 'valid';
+  inProgress: false,
+
+  isValidId: function() {
+    return Ember.isPresent(this.get('id'));
   }.property('id'),
 
-  classRealName: function() {
-    let value = this.get('realName');
-    return (Ember.isEmpty(value)) ? null : 'valid';
+  isValidRealName: function() {
+    return Ember.isPresent(this.get('realName'))
   }.property('realName'),
 
-  classAddress: function() {
-    let value = this.get('address');
-    return (Ember.isEmpty(value)) ? null : 'valid';
+  isValidAddress: function() {
+    return this.get('kredits.web3Instance').isAddress(this.get('address'));
   }.property('address'),
 
+  isValid: function() {
+    return this.get('isValidId') && this.get('isValidRealName') && this.get('isValidAddress');
+  }.property('isValidAddress', 'isValidId', 'isValidRealName'),
+
+  reset: function() {
+    this.setProperties({
+      id: null,
+      realName: null,
+      address: null,
+      ipfsHash: null,
+      isCore: true,
+      inProgress: false
+    });
+
+  },
 
   actions: {
-
     save() {
-      console.log('id', this.get('id'));
-      console.log('realName', this.get('realName'));
-      console.log('address', this.get('address'));
+      if(this.get('isValid')) {
+        this.set('inProgress', true);
+        this.get('kredits').addContributor(
+          this.get('address'),
+          this.get('realName'),
+          '', // TODO: this.get('ipfsHash')
+          this.get('isCore'),
+          this.get('id')
+        ).then(contributor => {
+          this.reset();
+          this.get('contributors').pushObject(contributor);
+          window.scroll(0,0);
+        });
+      } else {
+        alert('invalid data. please review');
+      }
     }
-
   }
 
 });
diff --git a/app/components/add-contributor/template.hbs b/app/components/add-contributor/template.hbs
index 9ef8f6b..4885873 100644
--- a/app/components/add-contributor/template.hbs
+++ b/app/components/add-contributor/template.hbs
@@ -4,23 +4,23 @@
             type="text"
             placeholder="GitHub UID (123)"
             value=id
-            class=classId}}
+            class=(if isValidId 'valid' '')}}
   </p>
   <p>
     {{input name="realname"
             type="text"
             placeholder="Carl Sagan"
             value=realName
-            class=classRealName}}
+            class=(if isValidRealName 'valid' '')}}
   </p>
   <p>
     {{input name="address"
             type="text"
             placeholder="0xF18E631Ea191aE4ebE70046Fcb01a436554421BA4"
             value=address
-            class=classAddress}}
+            class=(if isValidAddress 'valid' '')}}
   </p>
   <p class="actions">
-    <input type="submit" value="Save">
+    {{input type="submit" value=(if inProgress 'Processing' 'Save') disabled=inProgress}}
   </p>
 </form>
diff --git a/app/services/kredits.js b/app/services/kredits.js
index 54ae838..4312148 100644
--- a/app/services/kredits.js
+++ b/app/services/kredits.js
@@ -38,6 +38,7 @@ export default Ember.Service.extend({
       return this.get('kreditsContractInstance');
     }
 
+    console.log(config.ethereumChain);
     let contract = kreditsContracts(this.get('web3'), config.ethereumChain)['Kredits'];
 
     this.set('kreditsContractInstance', contract);
@@ -130,6 +131,24 @@ export default Ember.Service.extend({
     });
   },
 
+  addContributor(address, name, ipfsHash, isCore, id) {
+    Ember.Logger.debug('[kredits] add contributor', name, address);
+    return new Ember.RSVP.Promise((resolve, reject) => {
+      this.get('kreditsContract').addContributor(address, name, ipfsHash, isCore, id, (err, data) => {
+        if (err) { reject(err); }
+        Ember.Logger.debug('[kredits] add contributor response', data);
+        let contributor = Contributor.create({
+          address: address,
+          github_username: name,
+          github_uid: id,
+          ipfsHash: ipfsHash,
+          kredits: 0
+        });
+        resolve(contributor);
+      });
+    });
+  },
+
   logKreditsContract: function() {
     Ember.Logger.debug('[kredits] kreditsContract', this.get('kreditsContract'));
   }.on('init')
diff --git a/app/styles/components/_add-contributor.scss b/app/styles/components/_add-contributor.scss
index fb6f754..a17667e 100644
--- a/app/styles/components/_add-contributor.scss
+++ b/app/styles/components/_add-contributor.scss
@@ -26,6 +26,9 @@ section#add-contributor {
 
     input[type=submit] {
       padding: 0.6rem 2rem;
+      &:disabled {
+        background-color: transparent;
+      }
     }
 
   }
diff --git a/app/templates/index.hbs b/app/templates/index.hbs
index adf4053..5ce1c70 100644
--- a/app/templates/index.hbs
+++ b/app/templates/index.hbs
@@ -42,6 +42,6 @@
   </header>
 
   <div class="content">
-    {{add-contributor kredits=kredits}}
+    {{add-contributor kredits=kredits contributors=model.contributors}}
   </div>
 </section>