++ed by:
Author image Pedro Silva
and 1 contributors


WWW::Wordnik::API - Wordnik API implementation


This document describes WWW::Wordnik::API version 0.0.5.

The latest development revision is available at git://github.com/pedros/WWW-Wordnik-API.git.


    use WWW::Wordnik::API;

    my $p = WWW::Wordnik::API->new();

    $p->api_key('your api key here');

    $p->word( 'Perl', useSuggest => 'true' );
    $p->word( 'Perl', literal    => 'false' );

    $p->phrases( 'Python', count => 10 );

    $p->definitions( 'Ruby', count => 20 );
                    partOfSpeech => [
                        qw/noun verb adjective adverb idiom article abbreviation preposition prefix interjection suffix/


    $p->related('Lisp', type => [qw/synonym antonym form hyponym variant verb-stem verb-form cross-reference same-context/]);



    $p->suggest('C', count => 4);
    $p->suggest('C', startAt => 6);


    $p->randomWord(hasDictionaryDef => 'true');


This module implements version 4.0 of the Wordnik API (http://developer.wordnik.com/api). It provides a simple object-oriented interface with methods named after the REST ones provided by Wordnik. You should therefore be able to follow their documentation only and still work with this module.

At this point, this module builds request URIs and ship them out as GET methods to LWP::UserAgent. Response headers are checked for error codes (specifically, throw exception on headers anything other than 2/3xx). Response data is not post-processed in any way, other than optionally being parsed from JSON to Perl data structures. Data::Dumper should be of help there.



    my %args = (
        server_uri => 'http://api.wordnik.com/v4',
        api_key    => 'your key',
        version    => '4',
        format     => 'json', # json | xml | perl

    my $WN = WWW::Wordnik::API->new(%args);


All selector methods can be assigned to, or retrieved from, as follows:

    $WN->method($value) # assign
    $WN->method         # retrieve

Default $uri: http://api.wordnik.com/v4


Required $key: Your API key, which can be requested at http://api.wordnik.com/signup/.


Default $version: 4. This module supports API version 3 and 4 (default).


Default $format: json. Other accepted formats are xml and perl.


Default $cache: 10. Number of requests to cache. Deletes the oldest request if cache fills up.


Default $debug: 0. Don't sent GET requests to Wordnik. Return the actual request as a string.


word($word, %args)

This returns the word you requested, assuming it is found in our corpus. See http://docs.wordnik.com/api/methods#words.

$word is the word to look up. %args accepts:

Default useSuggest: false. Return an array of suggestions, if available.

Default literal: true. Return non-literal matches.

If the suggester is enabled, you can tell it to return the best match with useSuggest=true and literal=false.

phrases($word, %args)

You can fetch interesting bi-gram phrases containing a word. The "mi" and "wlmi" elements refer to "mutual information" and "weighted mutual information" and will be explained in detail via future blog post. See http://docs.wordnik.com/api/methods#phrases.

$word is the word to look up. %args accepts:

Default count: 5. Specify the number of results returned.

definitions($word, %args)

Definitions for words are available from Wordnik's keying of the Century Dictionary and parse of the Webster GCIDE. The Dictionary Model XSD is available in http://github.com/wordnik/api-examples/blob/master/docs/dictionary.xsd in GitHub. See http://docs.wordnik.com/api/methods#definitions.

$word is the word to look up. %args accepts:

Default count: 5. Specify the number of results returned.

Default partOfSpeech: empty. Specify one or many part-of-speech types for which to return definitions. Pass multiple types as an array reference.

The available partOfSpeech values are:

    [noun, verb, adjective, adverb, idiom, article, abbreviation, preposition, prefix, interjection, suffix]

You can retrieve 5 example sentences for a words in Wordnik's alpha corpus. Each example contains the source document and a source URL, if it exists. See http://docs.wordnik.com/api/methods#examples.

$word is the word to look up.

related($word, %args)

You retrieve related words for a particular word. See http://docs.wordnik.com/api/methods#relateds.

$word is the word to look up. %args accepts:

Default type: empty. Return one or many relationship types. Pass multiple types as an array reference.

The available type values are:

    [synonym, antonym, form, hyponym, variant, verb-stem, verb-form, cross-reference, same-context]

You can see how common particular words occur in Wordnik's alpha corpus, ordered by year. See http://docs.wordnik.com/api/methods#freq.

$word is the word to look up.


You can see how common particular words are used with punctuation. See http://docs.wordnik.com/api/methods#punc.

$word is the word to look up.

suggest($word, %args)

The autocomplete service gives you the opportunity to take a word fragment (start of a word) and show what other words start with the same letters. The results are based on corpus frequency, not static word lists, so you have access to more dynamic words in the language. See http://docs.wordnik.com/api/methods#auto.

$word is the word to look up. %args accepts:

Default count: 5. Specify the number of results returned.

Default startAt: 0. You can also specify the starting index for the results returned. This allows you to paginate through the matching values.


You can fetch Wordnik's word-of-the day which contains definitions and example sentences. See http://docs.wordnik.com/api/methods#wotd.


You can fetch a random word from the Alpha Corpus. See http://http://developer.wordnik.com/docs.

%args accepts:

Default hasDictionaryDef: true. You can ask the API to return only words where there is a definition available.


To install this module type the following:

   perl Build.PL
   Build test
   Build install


   perl Makefile.PL
   make test
   make install


"Can't access '$key' field in class $class"

Private or inexistent member variable.

"Invalid argument key or value: '$type'"

Inexistent query parameter, or wrong value passed to existing parameter.

"Parameter 'partOfSpeech' requires a reference to an array"

partOfSpeech => [qw/.../].

"Parameter 'type' requires a reference to an array"

type => [qw/.../].

"The operation you requested requires JSON to be installed"

perl -MCPAN -e 'install JSON'.

"Unsupported api format: '$format'"

Supported formats are 'perl', 'json', 'xml'.

"Unsupported api version: '$version'"

The only API version supported by this module is 3.


WWW::Wordnik::API requires no configuration files or environment variables.


This module requires the core modules Test::More, version and Carp, and LWP::UserAgent from CPAN. Additionally, it recommends-requires JSON from CPAN for getting data in Perl data structures.


None reported.


On versions 0.0.1 and 0.0.2, creation of a second object would clobber the first object's instance variables, resulting in unexpected behaviour. This is fixed in 0.0.3.

Response data is not post-processed in any way, other than optionally being parsed from JSON to Perl data structures. Data::Dumper should be of help there.

Please report any bugs or feature requests to bug-www-wordnik-api@rt.cpan.org, or through the web interface at http://rt.cpan.org.



Add filtering methods on response data.

Implement WWW::Wordnik::API::Response class to handle the above


Pedro Silva <pedros@berkeley.edu>


Copyright (c) 2010, Pedro Silva <pedros@berkeley.edu>. All rights reserved.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.