/users/{id} and /users/{id}/reputation disagree over +2 accept-answer bonuses

Question

I am using the 2.2 API to display user stats by quarter, but I also want to display reputation changes between any 2 dates.

I use the /users/{ids} API to get the summaries. For example, user 2403309 on Stack Overflow shows a +72 reputation change in the current (April 1 onwards) quarter (which matches his profile), but /users/2403309/reputation shows entries that add up to 68 and it seems to be missing a couple of +2 accept bonuses.

Any idea as to why this is?

Here's the screenshot of the profile, from April 28 (the last change before that was August last year):

This is the JSON I get by querying /users/{ids}/reputation from April 1 to May 4 (which is two days in the future, because otherwise some changes weren't included, but that is a separate question):

{
  "items": [
    {
      "on_date": 1399076511,
      "reputation_change": 10,
      "vote_type": "up_votes",
      "post_type": "answer",
      "post_id": 23416402,
      "user_id": 2403309
    },
    {
      "on_date": 1399076478,
      "reputation_change": 10,
      "vote_type": "up_votes",
      "post_type": "answer",
      "post_id": 23416787,
      "user_id": 2403309
    },
    {
      "on_date": 1398979754,
      "reputation_change": 15,
      "vote_type": "accepts",
      "post_type": "answer",
      "post_id": 23416787,
      "user_id": 2403309
    },
    {
      "on_date": 1398977734,
      "reputation_change": 15,
      "vote_type": "accepts",
      "post_type": "answer",
      "post_id": 23416402,
      "user_id": 2403309
    },
    {
      "on_date": 1398718062,
      "reputation_change": -2,
      "vote_type": "down_votes",
      "post_type": "question",
      "post_id": 23348663,
      "user_id": 2403309
    },
    {
      "on_date": 1398712175,
      "reputation_change": 5,
      "vote_type": "up_votes",
      "post_type": "question",
      "post_id": 23348663,
      "user_id": 2403309
    },
    {
      "on_date": 1398711479,
      "reputation_change": 5,
      "vote_type": "up_votes",
      "post_type": "question",
      "post_id": 23348269,
      "user_id": 2403309
    },
    {
      "on_date": 1398711171,
      "reputation_change": 5,
      "vote_type": "up_votes",
      "post_type": "question",
      "post_id": 17688439,
      "user_id": 2403309
    },
    {
      "on_date": 1398711150,
      "reputation_change": 5,
      "vote_type": "up_votes",
      "post_type": "question",
      "post_id": 17394188,
      "user_id": 2403309
    }
  ],
  "has_more": false,
  "quota_max": 10000,
  "quota_remaining": 9940
}

Answer 1

From the docs for /users/{ids}/reputation (emphasis mine):

Gets a subset of the reputation changes for users in {ids}.

I think you'll find that the API method you're using is working exactly as designed - it's just not designed to do what you were expecting.

Fortunately, /users/{ids}/reputation-history will yield precisely what you're after.

Returns users' public reputation history.

This is what http://api.stackexchange.com/users/2403309/reputation-history?site=stackoverflow&fromdate=1396310400&todate=1399420800 yields:

{
  "items": [
    {
      "reputation_history_type": "post_upvoted",
      "reputation_change": 10,
      "post_id": 23416402,
      "creation_date": 1399198727,
      "user_id": 2403309
    },
    {
      "reputation_history_type": "post_upvoted",
      "reputation_change": 10,
      "post_id": 23416402,
      "creation_date": 1399076511,
      "user_id": 2403309
    },
    {
      "reputation_history_type": "post_upvoted",
      "reputation_change": 10,
      "post_id": 23416787,
      "creation_date": 1399076478,
      "user_id": 2403309
    },
    {
      "reputation_history_type": "answer_accepted",
      "reputation_change": 15,
      "post_id": 23416787,
      "creation_date": 1398979754,
      "user_id": 2403309
    },
    {
      "reputation_history_type": "answer_accepted",
      "reputation_change": 15,
      "post_id": 23416402,
      "creation_date": 1398977734,
      "user_id": 2403309
    },
    {
      "reputation_history_type": "asker_accepts_answer",
      "reputation_change": 2,
      "post_id": 23415248,
      "creation_date": 1398973813,
      "user_id": 2403309
    },
    {
      "reputation_history_type": "post_downvoted",
      "reputation_change": -2,
      "post_id": 23348663,
      "creation_date": 1398718062,
      "user_id": 2403309
    },
    {
      "reputation_history_type": "post_upvoted",
      "reputation_change": 5,
      "post_id": 23348663,
      "creation_date": 1398712175,
      "user_id": 2403309
    },
    {
      "reputation_history_type": "asker_accepts_answer",
      "reputation_change": 2,
      "post_id": 23349002,
      "creation_date": 1398711485,
      "user_id": 2403309
    },
    {
      "reputation_history_type": "post_upvoted",
      "reputation_change": 5,
      "post_id": 23348269,
      "creation_date": 1398711479,
      "user_id": 2403309
    },
    {
      "reputation_history_type": "post_upvoted",
      "reputation_change": 5,
      "post_id": 17688439,
      "creation_date": 1398711171,
      "user_id": 2403309
    },
    {
      "reputation_history_type": "post_upvoted",
      "reputation_change": 5,
      "post_id": 17394188,
      "creation_date": 1398711150,
      "user_id": 2403309
    }
  ],
  "has_more": false,
  "quota_max": 300,
  "quota_remaining": 292
}

Which, accounting for that upvote from today (after you took your test data), is exactly what you're after.