Does the country publish the lists of parties and/or candidates registered for elections online?

Nigeria
Answer
Yes, not machine readable
Source
ELECTORAL ACT, 2010
31. -(1) Every political party shall not later than 60 days before the date appointed for a general election under the provisions of this Act, submit to the Commission in the prescribed forms the list of the candidates the Party proposes to sponsor at the elections.
(2) The list or information submitted by each candidate shall be accompanied by an Affidavit sworn to by the candidate at the High Court of a State, indicating that he has fulfilled all the constitutional requirements for election into that office.
(3) The Commission shall, within 7 days of the receipt of the personal particulars of the candidate, publish same in the constituency where the candidate intends to contest the election.
http://www.inecnigeria.org/wp-content/uploads/2013/07/EA2010.pdf
31. -(1) Every political party shall not later than 60 days before the date appointed for a general election under the provisions of this Act, submit to the Commission in the prescribed forms the list of the candidates the Party proposes to sponsor at the elections.
(2) The list or information submitted by each candidate shall be accompanied by an Affidavit sworn to by the candidate at the High Court of a State, indicating that he has fulfilled all the constitutional requirements for election into that office.
(3) The Commission shall, within 7 days of the receipt of the personal particulars of the candidate, publish same in the constituency where the candidate intends to contest the election.
http://www.inecnigeria.org/wp-content/uploads/2013/07/EA2010.pdf
Comment
http://inecnigeria.org/?page_id=38&paged=11
The lists contain the names of the candidates, the positions they are vying for, sex, party, age, and qualifications.
The lists contain the names of the candidates, the positions they are vying for, sex, party, age, and qualifications.