diff --git a/bugwarrior/services/mantisbt.py b/bugwarrior/services/mantisbt.py
new file mode 100644
index 0000000..e54af0d
--- /dev/null
+++ b/bugwarrior/services/mantisbt.py
@@ -0,0 +1,361 @@
+from builtins import filter
+import re
+import six
+
+import requests
+from jinja2 import Template
+
+from bugwarrior.config import asbool, aslist, die
+from bugwarrior.services import IssueService, Issue, ServiceClient
+
+import logging
+log = logging.getLogger(__name__)
+
+
+class MantisbtClient(ServiceClient):
+    def __init__(self, host, token):
+        self.host = host
+        self.session = requests.Session()
+        self.session.headers['Authorization'] = token
+
+    def _api_url(self, path, **context):
+        """ Build the full url to the API endpoint """
+        baseurl = "https://{}/api/rest".format(self.host)
+        return baseurl + path.format(**context)
+
+    def get_user(self):
+        return self.json_response(self.session.get(self._api_url("/users/me")))
+
+    def get_projects(self):
+        return self._getter(self._api_url("/projects"), subkey="projects")
+
+    def get_issues(self):
+        url = self._api_url("/issues?page_size=50")
+        return self._getter(url, page_size=50, subkey="issues")
+
+    def get_assigned_issues(self):
+        """ Returns all issues assigned to authenticated user.
+        """
+        url = self._api_url("/issues?page_size=50&filter_id=assigned")
+        return self._getter(url, page_size=50, subkey="issues")
+
+    def get_monitored_issues(self):
+        """ Returns all issues monitored by authenticated user.
+        """
+        url = self._api_url("/issues?page_size=50&filter_id=monitored")
+        return self._getter(url, page_size=50, subkey="issues")
+
+    def get_reported_issues(self):
+        """ Returns all issues reported by authenticated user.
+        """
+        url = self._api_url("/issues?page_size=50&filter_id=reported")
+        return self._getter(url, page_size=50, subkey="issues")
+
+    def _getter(self, url, page_size=None, subkey=None):
+        """ Pagination utility.  Obnoxious. """
+
+        results = []
+        link = dict(next=url)
+        page_number = 1
+
+        while 'next' in link:
+            if page_size is not None:
+                response = self.session.get(link['next'] + "&page=" + str(page_number))
+            else:
+                response = self.session.get(link['next'])
+
+            json_res = self.json_response(response)
+
+            if subkey is not None:
+                json_res = json_res[subkey]
+
+            results += json_res
+
+            if page_size is not None and len(json_res) == page_size:
+                page_number += 1
+            else:
+                break
+
+        return results
+
+class MantisbtIssue(Issue):
+    TITLE = 'mantisbttitle'
+    BODY = 'mantisbtbody'
+    CREATED_AT = 'mantisbtcreatedon'
+    UPDATED_AT = 'mantisbtupdatedat'
+    CLOSED_AT = 'mantisbtclosedon'
+    URL = 'mantisbturl'
+    PROJECT = 'mantisbtproject'
+    NUMBER = 'mantisbtnumber'
+    USER = 'mantisbtuser'
+    CATEGORY = 'mantisbtcategory'
+    STATE = 'mantisbtstate'
+
+    UDAS = {
+        TITLE: {
+            'type': 'string',
+            'label': 'Mantisbt Title',
+        },
+        BODY: {
+            'type': 'string',
+            'label': 'Mantisbt Body',
+        },
+        CREATED_AT: {
+            'type': 'date',
+            'label': 'Mantisbt Created',
+        },
+        UPDATED_AT: {
+            'type': 'date',
+            'label': 'Mantisbt Updated',
+        },
+        CLOSED_AT: {
+            'type': 'date',
+            'label': 'Mantisbt Closed',
+        },
+        PROJECT: {
+            'type': 'string',
+            'label': 'Mantisbt Project',
+        },
+        URL: {
+            'type': 'string',
+            'label': 'Mantisbt URL',
+        },
+        NUMBER: {
+            'type': 'numeric',
+            'label': 'Mantisbt Issue #',
+        },
+        USER: {
+            'type': 'string',
+            'label': 'Mantisbt User',
+        },
+        CATEGORY: {
+            'type': 'string',
+            'label': 'Mantisbt Category',
+        },
+        STATE: {
+            'type': 'string',
+            'label': 'Mantisbt State',
+        }
+    }
+    UNIQUE_KEY = (URL, NUMBER, )
+
+    def _normalize_tag(self, label):
+        return re.sub(r'[^a-zA-Z0-9]', '_', label)
+
+    def to_taskwarrior(self):
+        body = self.record.get('description')
+        if body:
+            body = body.replace('\r\n', '\n')
+
+        created = self.parse_date(self.record.get('created_at'))
+        updated = self.parse_date(self.record.get('updated_at'))
+        closed_date = None
+        if self.record["status"]["name"] in ["closed", "resolved"]:
+            for history in self.record.get("history", []):
+                if history.get("field", {}).get("name", "") == "status"\
+                        and history.get("new_value", {}).get("name", "") in ["closed", "resolved"]:
+                    closed_date = history["created_at"]
+        closed = self.parse_date(closed_date)
+
+        return {
+            'project': self.record['project']['name'],
+            'priority': self.origin['default_priority'],
+            'annotations': self.get_annotations(),
+            'tags': self.get_tags(),
+            'entry': created,
+            'end': closed,
+
+            self.TITLE: self.record.get('summary'),
+            self.BODY: body,
+            self.CREATED_AT: created,
+            self.UPDATED_AT: updated,
+            self.CLOSED_AT: closed,
+            self.URL: self.get_url(),
+            self.PROJECT: self.record['project'].get('name'),
+            self.NUMBER: self.record['id'],
+            self.USER: self.record['reporter'].get('name'),
+            self.CATEGORY: self.record['category'].get('name'),
+            self.STATE: self.record['status'].get('label'),
+        }
+
+    def get_url(self):
+        return "https://{}view.php?id={}".format(self.extra['host'], self.record["id"])
+
+    def get_annotations(self):
+        annotations = []
+
+        context = self.record.copy()
+        annotation_template = Template(self.origin['annotation_template'])
+
+        for annotation_dict in self.record.get('notes', []):
+            context.update({
+                'text': annotation_dict['text'],
+                'date': annotation_dict['created_at'],
+                'author': annotation_dict['reporter'].get('name', 'unknown'),
+                'view': annotation_dict['view_state']['label'],
+                })
+            annotations.append(
+                    annotation_template.render(context)
+                    )
+        return annotations
+
+    def get_tags(self):
+        tags = []
+
+        context = self.record.copy()
+        tag_template = Template(self.origin['tag_template'])
+
+        for tag_dict in self.record.get('tags', []):
+            context.update({
+                'tag': self._normalize_tag(tag_dict['name'])
+            })
+            tags.append(
+                tag_template.render(context)
+            )
+
+        return tags
+
+    def get_default_description(self):
+        return self.build_default_description(
+            title=self.record['summary'],
+            url=self.get_processed_url(self.get_url()),
+            number=self.record['id'],
+        )
+
+
+class MantisbtService(IssueService):
+    ISSUE_CLASS = MantisbtIssue
+    CONFIG_PREFIX = 'mantisbt'
+
+    def __init__(self, *args, **kw):
+        super(MantisbtService, self).__init__(*args, **kw)
+
+        self.host = self.config.get('host', 'www.mantisbt.org/bugs/')
+
+        token = self.get_password('token')
+
+        self.client = MantisbtClient(self.host, token)
+        self.user = None
+
+        self.exclude_projects = self.config.get('exclude_projects', [], aslist)
+        self.include_projects = self.config.get('include_projects', [], aslist)
+
+        self.involved_issues = self.config.get(
+            'involved_issues', default=True, to_type=asbool
+        )
+        self.assigned_issues = self.config.get(
+            'assigned_issues', default=False, to_type=asbool
+        )
+        self.monitored_issues = self.config.get(
+            'monitored_issues', default=False, to_type=asbool
+        )
+        self.reported_issues = self.config.get(
+            'reported_issues', default=False, to_type=asbool
+        )
+        self.tag_template = self.config.get(
+            'tag_template', default='{{tag}}', to_type=six.text_type
+        )
+        self.annotation_template = self.config.get(
+            'annotation_template', default='{{date}} {{author}} ({{view}}): {{text}}', to_type=six.text_type
+        )
+
+    def get_service_metadata(self):
+        return {
+            'tag_template': self.tag_template,
+            'annotation_template': self.annotation_template,
+        }
+
+    def filter_involved_issues(self, issue):
+        _, issue = issue
+        user = self.client.get_user()
+        uid = user["id"]
+        if issue["reporter"]["id"] != uid and \
+                issue.get("handler", {}).get("id") != uid and \
+                all([ x.get("user", {}).get("id") != uid for x in issue.get("history", [])]) and \
+                all([ x.get("user", {}).get("id") != uid for x in issue.get("monitors", [])]):
+            return False
+        return self.filter_project_name(issue["project"]["name"])
+
+    def filter_issues(self, issue):
+        _, issue = issue
+        return self.filter_project_name(issue["project"]["name"])
+
+    def filter_project_name(self, name):
+        if self.exclude_projects:
+            if name in self.exclude_projects:
+                return False
+
+        if self.include_projects:
+            if name in self.include_projects:
+                return True
+            else:
+                return False
+
+        return True
+
+    @staticmethod
+    def get_keyring_service(service_config):
+        host = service_config.get('host', 'www.mantisbt.org/bugs/')
+        username = service_config.get('username', default='nousername')
+        return "mantisbt://{username}@{host}".format(username=username,
+                host=host)
+
+    @staticmethod
+    def to_issue_dict(issues):
+        return { i['id']: i for i in issues }
+
+    def get_owner(self, issue):
+        return issue.get("handler", {}).get("name")
+
+    def get_author(self, issue):
+        return issue.get("reporter", {}).get("name")
+
+    def issues(self):
+        issues = {}
+        is_limited = self.assigned_issues or self.monitored_issues or self.reported_issues
+
+        if self.assigned_issues:
+            issues.update(
+                filter(self.filter_issues, self.to_issue_dict(self.client.get_assigned_issues()).items())
+            )
+        if self.monitored_issues:
+            issues.update(
+                filter(self.filter_issues, self.to_issue_dict(self.client.get_monitored_issues()).items())
+            )
+        if self.reported_issues:
+            issues.update(
+                filter(self.filter_issues, self.to_issue_dict(self.client.get_reported_issues()).items())
+            )
+
+        if not is_limited:
+            all_issues = self.to_issue_dict(self.client.get_issues())
+            if self.involved_issues:
+                issues.update(
+                    filter(self.filter_involved_issues, all_issues.items())
+                )
+            else:
+                issues.update(
+                    filter(self.filter_issues, all_issues.items())
+                )
+
+        log.debug(" Found %i issues.", len(issues))
+        if not is_limited:
+            issues = list(filter(self.include, issues.values()))
+        else:
+            issues = list(issues.values())
+        log.debug(" Pruned down to %i issues.", len(issues))
+
+        for issue in issues:
+            issue_obj = self.get_issue_for_record(issue)
+            extra = {
+                'host': self.host
+            }
+            issue_obj.update_extra(extra)
+            yield issue_obj
+
+    @classmethod
+    def validate_config(cls, service_config, target):
+        if 'token' not in service_config:
+            die("[%s] has no 'mantisbt.token'" % target)
+
+        super(MantisbtService, cls).validate_config(service_config, target)
diff --git a/setup.py b/setup.py
index d6d957a..665e36e 100644
--- a/setup.py
+++ b/setup.py
@@ -80,6 +80,7 @@ setup(name='bugwarrior',
       activecollab2=bugwarrior.services.activecollab2:ActiveCollab2Service
       activecollab=bugwarrior.services.activecollab:ActiveCollabService
       jira=bugwarrior.services.jira:JiraService
+      mantisbt=bugwarrior.services.mantisbt:MantisbtService
       megaplan=bugwarrior.services.megaplan:MegaplanService
       phabricator=bugwarrior.services.phab:PhabricatorService
       versionone=bugwarrior.services.versionone:VersionOneService