I would have action creators to indicate that a request should be made... I would have sagas watching for the requests and to perform the API calls and dispatch to the store when the API call succeeds/fails.

Each toggle can be set individually without regard for other toggle requests. Your UI can check to see if a particular toggle is pending and then disable just that one toggle...

e.g.

 // Actions
 const Actions = {
   REQUEST: 'REQUEST',
   SUCCESS: 'SUCCESS',
   FAILURE: 'FAILURE'
 };

 // Action Creators
 const request = id => ({
   type: Actions.REQUEST,
   payload: id
 });
 const success = id => ({
   type: Actions.SUCCESS,
   payload: null,
   meta: { id }
 });
const failure = (id, err) => ({
   type: Actions.SUCCESS,
   payload: err,
   error: true,
   meta: { id }
 });

 // Sagas
 function* requestSaga() {
   yield takeEvery(Actions.REQUEST, function*(action) {
     const { id } = action.payload;
     try {
       yield call(yourApiPostMethod, `/api/toggle/${id}`);
     }
     catch (err) {
       yield put(failure(id, err));
       return;
     }
     yield put(success(id));
   });
 }

 // Reducer
 const reducer = (state = {}, action) => {
   switch (action.type) {
     case Actions.REQUEST:
       return {
         ...state,
         pending: [ ...state.pending, action.payload ],
       };
     case Actions.SUCCESS: {
       const { id } = action.meta;
       const { errors, pending } = state;
       const newErrors = { ...errors };
       delete newErrors[id];
       const i = pending.indexOf(id);
       return {
         ...state,
         pending: pending.splice(i, 1),
         errors: newErrors,
       };
     }
     case Actions.FAILURE: {
       const { id } = action.meta;
       const { errors, pending } = state;
       const i = pending.indexOf(id);
       return {
         ...state,
         pending: pending.splice(i, 1),
         errors: { ...errors, [id]: action.payload },
       };
     }
   }
   return state;
 };

 // Components

 const Child = ({ toggle, pending, label }) =>
   <div onClick={ toggle } disabled={ pending }>{ label }</div>
 ;

 const ParentComponent = ({ toggle, pending, items, ...otherProps }) =>
   <div>
     {items.map(i =>
       <Child
         key={ i.id }
         toggle={ toggle(i.id) }
         label={ i.label }
         pending={ pending(i.id) }
       />
     )}
   </div>
 ;
 const mapStateToParentProps = state => ({
   pending: id => state.pending.indexOf(id) >= 0,
 });
 const mapDispatchToParentProps = dispatch => ({
   toggle: id => () => dispatch(request(id))
 });
 const Parent = connect(
   mapStateToParentProps,
   mapDispatchToParentProps
 )(ParentComponent);

I have a bunch of redux-saga posts planned over the next few weeks on my blog. Check it out if you'd like more of this. https://decembersoft.com/posts/tag/redux-saga/