To do this you have to use the /users/{ids}/answers path to download all of a user's answers, and then filter out the tags and/or tot-up the scores from there.

Pseudo code:

scoreByTag = [] // Empty associative array

while (more pages of results) {
    1) Fetch next page of answers

    2) Store results and/or update scoreByTag array
}

Display/use select tag score(s) as desired.

Note that [there is already a page that does this][2]. It displays a user's tag scores for all his tags, with handy searching and sorting:

[**Here's the results for your Stack Overflow account.**][5]

See, also How to filter getAnswersForUser by tag?, for a similar solution on the old API.

To do this you have to use the /users/{ids}/answers path to download all of a user's answers, and then filter out the tags and/or tot-up the scores from there.

Pseudo code:

scoreByTag = [] // Empty associative array

while (more pages of results) {
    1) Fetch next page of answers

    2) Store results and/or update scoreByTag array
}

Display/use select tag score(s) as desired.

Note that [there is already a page that does this][2]. It displays a user's tag scores for all his tags, with handy searching and sorting:

[**Here's the results for your Stack Overflow account.**][5]

See, also How to filter getAnswersForUser by tag?, for a similar solution on the old API.