diff --git a/app/controllers/me/pending-invites.js b/app/controllers/me/pending-invites.js
new file mode 100644
index 00000000000..08a547ba3c7
--- /dev/null
+++ b/app/controllers/me/pending-invites.js
@@ -0,0 +1,33 @@
+import Ember from 'ember';
+import { inject as service } from '@ember/service';
+
+export default Ember.Controller.extend({
+    ajax: service(),
+    isError: false,
+    inviteError: 'default error message',
+
+    actions: {
+        acceptInvitation(invite) {
+            this.get('ajax').put('/api/v1/me/accept_owner_invite', {
+                contentType: 'application/json; charset=utf-8',
+                data: JSON.stringify({
+                    crate_owner_invitation: {
+                        invited_by_username: invite.get('invited_by_username'),
+                        crate_name: invite.get('crate_name'),
+                        crate_id: invite.get('crate_id'),
+                        created_at: invite.get('created_at')
+                    }
+                })
+            }).catch((error) => {
+                this.set('isError', true);
+                if (error.payload) {
+                    this.set('inviteError', 
+                             `Error in accepting invite: ${error.payload.errors[0].detail}`
+                    );
+                } else {
+                    this.set('inviteError', 'Error in accepting invite');
+                }
+            });
+        }
+    }
+});
diff --git a/app/styles/me.scss b/app/styles/me.scss
index c5e6a5fb113..2e22e08c5ab 100644
--- a/app/styles/me.scss
+++ b/app/styles/me.scss
@@ -185,6 +185,11 @@
         @include justify-content(space-between);
 
         .date { @include flex-grow(2); text-align: right; }
+        .label {
+            .small-text {
+                font-size: 90%;
+            }
+        }
     }
 }
 
diff --git a/app/templates/me/pending-invites.hbs b/app/templates/me/pending-invites.hbs
index df6f0e8e985..0b5ff1ab379 100644
--- a/app/templates/me/pending-invites.hbs
+++ b/app/templates/me/pending-invites.hbs
@@ -28,11 +28,18 @@
                         <span class='small'>{{moment-from-now invite.created_at}}</span>
                     </div>
                     <div class='actions'>
-                        <button class='small yellow-button'>Accept</button>
+                        <button class='small yellow-button' {{action 'acceptInvitation' invite}}>Accept</button>
                         <button class='small yellow-button'>Deny</button>
                     </div>
+                    {{#if isError}}
+                        <div class='label'>
+                            <p class='small-text'>{{inviteError}}</p>
+                        </div>
+                    {{/if}}
                 </div>
             </div>
+        {{else}}
+            <p>You don't seem to have any pending invitations.</p>
         {{/each}}
     </div>
 </div>
diff --git a/src/crate_owner_invitation.rs b/src/crate_owner_invitation.rs
index 085fa84f3ec..6f2693a3b58 100644
--- a/src/crate_owner_invitation.rs
+++ b/src/crate_owner_invitation.rs
@@ -1,12 +1,14 @@
 use conduit::{Request, Response};
 use diesel::prelude::*;
 use time::Timespec;
+use serde_json;
 
 use db::RequestTransaction;
-use schema::{crate_owner_invitations, users, crates};
+use schema::{crate_owner_invitations, users, crates, crate_owners};
 use user::RequestUser;
-use util::errors::CargoResult;
+use util::errors::{CargoResult, human};
 use util::RequestUtils;
+use owner::{CrateOwner, OwnerKind};
 
 /// The model representing a row in the `crate_owner_invitations` database table.
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Identifiable, Queryable)]
@@ -80,3 +82,48 @@ pub fn list(req: &mut Request) -> CargoResult<Response> {
     }
     Ok(req.json(&R { crate_owner_invitations }))
 }
+
+/// Handles the `PUT /me/accept_owner_invite` route.
+pub fn accept_invite(req: &mut Request) -> CargoResult<Response> {
+    use diesel::{insert, delete};
+    let conn = &*req.db_conn()?;
+    let user_id = req.user()?.id;
+
+    let mut body = String::new();
+    req.body().read_to_string(&mut body)?;
+
+    #[derive(Deserialize)]
+    struct OwnerInvitation {
+        crate_owner_invitation: EncodableCrateOwnerInvitation,
+    }
+
+    let crate_invite: OwnerInvitation = serde_json::from_str(&body).map_err(
+        |_| human("invalid json request"),
+    )?;
+
+    let crate_invite = crate_invite.crate_owner_invitation;
+
+    let pending_crate_owner = crate_owner_invitations::table
+        .filter(crate_owner_invitations::crate_id.eq(crate_invite.crate_id))
+        .filter(crate_owner_invitations::invited_user_id.eq(user_id))
+        .first::<CrateOwnerInvitation>(&*conn)?;
+
+    let owner = CrateOwner {
+        crate_id: crate_invite.crate_id,
+        owner_id: user_id,
+        created_by: pending_crate_owner.invited_by_user_id,
+        owner_kind: OwnerKind::User as i32,
+    };
+
+    conn.transaction(|| {
+        insert(&owner).into(crate_owners::table).execute(conn)?;
+        delete(crate_owner_invitations::table.filter(crate_owner_invitations::crate_id.eq(crate_invite.crate_id)))
+            .execute(conn)?;
+
+        #[derive(Serialize)]
+        struct R {
+            ok: bool,
+        }
+        Ok(req.json(&R { ok: true }))
+    })
+}
diff --git a/src/lib.rs b/src/lib.rs
index 442ed59d7ec..944cc6eb71b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -191,6 +191,7 @@ pub fn middleware(app: Arc<App>) -> MiddlewareBuilder {
         "/me/crate_owner_invitations",
         C(crate_owner_invitation::list),
     );
+    api_router.put("/me/accept_owner_invite", C(crate_owner_invitation::accept_invite));
     api_router.get("/summary", C(krate::summary));
     api_router.put("/confirm/:email_token", C(user::confirm_user_email));
     api_router.put("/users/:user_id/resend", C(user::regenerate_token_and_send));
diff --git a/src/tests/all.rs b/src/tests/all.rs
index 633ec9533b0..caf07d7ef16 100644
--- a/src/tests/all.rs
+++ b/src/tests/all.rs
@@ -15,6 +15,7 @@ extern crate dotenv;
 extern crate git2;
 extern crate semver;
 extern crate serde;
+#[macro_use]
 extern crate serde_json;
 extern crate time;
 extern crate url;
diff --git a/src/tests/http-data/owners_test_accept_invitation b/src/tests/http-data/owners_test_accept_invitation
new file mode 100644
index 00000000000..fe51488c706
--- /dev/null
+++ b/src/tests/http-data/owners_test_accept_invitation
@@ -0,0 +1 @@
+[]
diff --git a/src/tests/owners.rs b/src/tests/owners.rs
index b19c59fae50..7c7ddf58818 100644
--- a/src/tests/owners.rs
+++ b/src/tests/owners.rs
@@ -370,3 +370,97 @@ fn invitations_list() {
     assert_eq!(json.crate_owner_invitations[0].crate_name, "invited_crate");
     assert_eq!(json.crate_owner_invitations[0].crate_id, krate.id);
 }
+
+/*  Given a user inviting a different user to be a crate
+    owner, check that the user invited can accept their
+    invitation, the invitation will be deleted from
+    the invitations table, and a new crate owner will be
+    inserted into the table for the given crate.
+*/
+#[test]
+fn test_accept_invitation() {
+    #[derive(Deserialize)]
+    struct S {
+        ok: bool
+    }
+
+    #[derive(Deserialize)]
+    struct R {
+        crate_owner_invitations: Vec<EncodableCrateOwnerInvitation>,
+    }
+
+    #[derive(Deserialize)]
+    struct Q {
+        users: Vec<EncodablePublicUser>,
+    }
+
+    let (_b, app, middle) = ::app();
+    let mut req = ::req(
+        app.clone(),
+        Method::Get,
+        "/api/v1/me/crate_owner_invitations",
+    );
+    let (krate, user) = {
+        let conn = app.diesel_database.get().unwrap();
+        let owner = ::new_user("inviting_user").create_or_update(&conn).unwrap();
+        let user = ::new_user("invited_user").create_or_update(&conn).unwrap();
+        let krate = ::CrateBuilder::new("invited_crate", owner.id).expect_build(&conn);
+
+        // This should be replaced by an actual call to the route that `owner --add` hits once
+        // that route creates an invitation.
+        let invitation = NewCrateOwnerInvitation {
+            invited_by_user_id: owner.id,
+            invited_user_id: user.id,
+            crate_id: krate.id,
+        };
+        diesel::insert(&invitation)
+            .into(crate_owner_invitations::table)
+            .execute(&*conn)
+            .unwrap();
+        (krate, user)
+    };
+    ::sign_in_as(&mut req, &user);
+
+    let body = json!({
+        "crate_owner_invitation": {
+            "invited_by_username": "inviting_user",
+            "crate_name": "invited_crate",
+            "crate_id": krate.id,
+            "created_at": ""
+        }
+    });
+
+    // first check that response from inserting new crate owner
+    // and deleting crate_owner_inviitation is okay
+    let mut response = ok_resp!(
+        middle.call(
+            req.with_path("api/v1/me/accept_owner_invite")
+            .with_method(Method::Put)
+            .with_body(body.to_string().as_bytes()),
+        )
+    );
+
+    assert!(::json::<S>(&mut response).ok);
+
+    // then check to make sure that accept_invite did what it
+    // was supposed to
+    // crate_owner_invitation was deleted
+    let mut response = ok_resp!(
+        middle.call(
+            req.with_path("api/v1/me/crate_owner_invitations")
+            .with_method(Method::Get)
+        )
+    );
+    let json: R = ::json(&mut response);
+    assert_eq!(json.crate_owner_invitations.len(), 0);
+
+    // new crate owner was inserted
+    let mut response = ok_resp!(
+        middle.call(
+            req.with_path("/api/v1/crates/invited_crate/owners")
+            .with_method(Method::Get)
+        )
+    );
+    let json: Q = ::json(&mut response);
+    assert_eq!(json.users.len(), 2);
+}