diff --git a/plugins/Pinboard/Controller/API.php b/plugins/Pinboard/Controller/API.php
deleted file mode 100644
index 9b6a00a0f1..0000000000
--- a/plugins/Pinboard/Controller/API.php
+++ /dev/null
@@ -1,133 +0,0 @@
-<?php
-
-declare(strict_types = 1);
-
-namespace Plugin\Pinboard\Controller;
-
-use App\Core\Controller;
-use App\Core\DB;
-use App\Core\Router;
-use App\Core\VisibilityScope;
-use App\Entity\Note;
-use App\Util\Exception\ClientException;
-use App\Util\Exception\ServerException;
-use App\Util\Formatting;
-use Component\Conversation\Conversation;
-use Datetime;
-use Plugin\Pinboard\Entity\Pin;
-use Plugin\Pinboard\Util;
-use Symfony\Component\HttpFoundation\JsonResponse;
-use Symfony\Component\HttpFoundation\Request;
-use Symfony\Component\HttpFoundation\Response;
-
-class API extends Controller
-{
-    private function before()
-    {
-        $format     = $this->string('format');
-        $auth_token = $this->string('auth_token');
-        if ($format !== 'json') {
-            throw new ServerException(_m('Only JSON is supported'));
-        }
-
-        if (\is_null($auth_token)) {
-            return new Response('API requires authentication', status: 401);
-        }
-
-        if (\is_null($user = Util::validateToken($auth_token))) {
-            return new Response('401 Forbidden', status: 401);
-        }
-
-        return $user;
-    }
-
-    /**
-     * Last post update
-     */
-    public function posts_update(Request $request)
-    {
-        self::before();
-
-        return new JsonResponse(
-            ['update_time' => date(\DATE_ISO8601)], // TODO fetch latest and reply accordingly
-            status: 200,
-            headers: ['content-type' => 'application/json'],
-        );
-    }
-
-    /**
-     * Add a pin
-     */
-    public function posts_add(Request $request)
-    {
-        $user = self::before();
-
-        if (\is_null($url = $this->string('url'))) {
-            throw new ClientException('URL must be provided');
-        }
-
-        if (\is_null($title = $this->string('description'))) { // Logically.
-            throw new ClientException('Desciption must be provided');
-        }
-
-        $description = $this->string('extended') ?? '';
-
-        $tags = [];
-        if (!\is_null($tags_text = $this->string('tags'))) {
-            Formatting::toArray($tags_text, $tags, Formatting::SPLIT_BY_BOTH);
-        }
-
-        $modified = $this->string('dt')    ?? new Datetime;
-        $replace  = $this->bool('replace') ?? true;
-        $public   = $this->bool('shared')  ?? true;
-        $unread   = $this->bool('toread')  ?? false;
-
-        $result_code     = 'something went wrong';
-        [$pin, $existed] = Pin::checkExistingAndCreateOrUpdate(
-            args: [
-                'actor_id' => $user->getId(),
-                'url_hash' => hash('sha256', $url),
-                'url'      => $url,
-                'replace'  => $replace,
-                'public'   => $public,
-                'unread'   => $unread,
-                'modified' => $modified,
-            ],
-            find_by_keys: ['actor_id', 'url_hash'],
-        );
-
-        if ($existed) {
-            if (!$replace) {
-                $result_code = 'item already exists';
-            } else {
-                throw new ServerException('Updating is unimplemented'); // TODO delete old note, create new one
-            }
-        } else {
-            DB::persist($note = Note::create([
-                'actor_id'     => $user->getId(),
-                'content'      => $url,
-                'content_type' => 'text/uri-list',
-                'rendered'     => Formatting::twigRenderFile('pinboard/render.html.twig', ['url' => $url, 'title' => $title, 'description' => $description]),
-                'reply_to'     => null,
-                'is_local'     => true,
-                'source'       => 'Pinboard API',
-                'scope'        => $public ? VisibilityScope::EVERYWHERE->value : VisibilityScope::ADDRESSEE->value,
-                'language_id'  => $user->getActor()->getTopLanguage()->getId(),
-                'type'         => 'pin',
-                'title'        => $title,
-            ]));
-            $note->setUrl(Router::url('note_view', ['id' => $note->getId()], Router::ABSOLUTE_URL));
-            $pin->setNoteId($note->getId());
-            Conversation::assignLocalConversation($note, null);
-            // TODO handle tags
-            DB::flush();
-            $result_code = 'done';
-        }
-
-        return new JsonResponse(
-            ['result_code' => $result_code],
-            status: 200,
-            headers: ['content-type' => 'application/json'],
-        );
-    }
-}
diff --git a/plugins/Pinboard/Controller/APIv1.php b/plugins/Pinboard/Controller/APIv1.php
new file mode 100644
index 0000000000..8c4afa6b1f
--- /dev/null
+++ b/plugins/Pinboard/Controller/APIv1.php
@@ -0,0 +1,327 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Plugin\Pinboard\Controller;
+
+use App\Core\Cache;
+use App\Core\Controller;
+use App\Core\DB;
+use function App\Core\I18n\_m;
+use App\Core\Router;
+use App\Core\VisibilityScope;
+use App\Entity\LocalUser;
+use App\Entity\Note;
+use App\Util\Exception\BugFoundException;
+use App\Util\Exception\ClientException;
+use App\Util\Exception\ServerException;
+use App\Util\Formatting;
+use Component\Conversation\Conversation;
+use Component\Tag\Entity\NoteTag;
+use Datetime;
+use DateTimeImmutable;
+use DateTimeInterface;
+use Functional as F;
+use Plugin\Pinboard\Entity\Pin;
+use Plugin\Pinboard\Util;
+use SimpleXMLElement;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Serializer\Encoder\XmlEncoder;
+
+class APIv1 extends Controller
+{
+    public const SOURCE = 'Pinboard API v1';
+
+    private function before()
+    {
+        $format     = $this->string('format');
+        $auth_token = $this->string('auth_token');
+        if (\is_null($format)) {
+            return new Response(_m('Format must be specified'), status: 400);
+        }
+
+        if ($format !== 'json') {
+            throw new ServerException(_m('Only JSON is supported'));
+        }
+
+        if (\is_null($auth_token)) {
+            return new Response('API requires authentication', status: 401);
+        }
+
+        if (\is_null($user = Util::validateToken($auth_token))) {
+            return new Response('401 Forbidden', status: 401);
+        }
+
+        return $user;
+    }
+
+    private function respond(array $result, int $status = 200): Response
+    {
+        $format = $this->string('format');
+        if ($format === 'json') {
+            return new JsonResponse($result, status: $status);
+        } elseif ($format === 'xml') {
+            // $encoder = new XmlEncoder();
+            // $xml = $encoder->encode($result, 'xml');
+            [$tag_names, $keys] = F\zip(...F\map(array_keys($result), fn (string $k) => explode('_', $k)));
+            $xml = new SimpleXMLElement('<' . $tag_names[0] . '/>');
+            dd($tag_names, $keys, $result, $xml, (string) $xml);
+            $xml->addChild();
+            dd($xml);
+            return new Response(content: $xml, status: $statis);
+        }
+    }
+
+    private function deleteNoteAndMaybePin(LocalUser $user, Note $note, ?Pin $pin): void
+    {
+        $note->delete($user->getActor(), self::SOURCE);
+        if (!\is_null($note)) {
+            DB::remove($pin);
+        }
+        DB::flush();
+    }
+
+    private function parseTags(): array
+    {
+        $tags = [];
+        if (!\is_null($tags_text = $this->string('tags'))) {
+            Formatting::toArray($tags_text, $tags, Formatting::SPLIT_BY_BOTH);
+        }
+        return $tags;
+    }
+
+    private function getLatestModified(LocalUser $user): string
+    {
+        return Cache::get(
+            Pin::cacheKeys($user)['last-modified'],
+            fn () => DB::dql(
+                <<<'EOF'
+                    select MAX(p.modified) as max from \Plugin\Pinboard\Entity\Pin p
+                    where p.actor_id = :actor_id
+                    group by p.modified
+                    EOF,
+                ['actor_id' => $user->getId()],
+            )[0]['max'],
+        );
+    }
+
+    /**
+     * @param Pin[] $pins
+     *
+     * @return array json for response
+     */
+    private function formatPins(LocalUser $user, array $pins): array
+    {
+        return [
+            'date'  => self::getLatestModified($user),
+            'user'  => $user->getNickname(),
+            'posts' => F\map(
+                $pins,
+                fn (Pin $pin) => [
+                    'href'        => $pin->getUrl(),
+                    'description' => $pin->getTitle(),
+                    'extended'    => $pin->getDescription(),
+                    'meta'        => hash('md5', $pin->getModified()->format(DateTimeInterface::ISO8601)),
+                    'hash'        => hash('md5', $pin->getUrl() . $pin->getTitle() . $pin->getDescription()), // idk...
+                    'time'        => $pin->getModified()->format(DateTimeInterface::ISO8601),
+                    'shared'      => $pin->getPublic(),
+                    'toread'      => $pin->getUnread(),
+                    'tags'        => implode(' ', F\map($pin->getTags(), fn (NoteTag $tag) => $tag->getTag())),
+                ],
+            ),
+        ];
+    }
+
+    // ----------------------
+
+    /**
+     * Returns the most recent time a bookmark was added, updated or
+     * deleted. Use this before calling posts/all to see if the data
+     * has changed since the last fetch
+     */
+    public function posts_update(Request $request)
+    {
+        $user = self::before();
+
+        return self::respond(['update_time' => self::getLatestModified($user)]);
+    }
+
+    /**
+     * Add a bookmark
+     */
+    public function posts_add(Request $request)
+    {
+        $user = self::before();
+
+        if (\is_null($url = $this->string('url'))) {
+            throw new ClientException('URL must be provided');
+        }
+
+        if (\is_null($title = $this->string('description'))) { // Logically.
+            throw new ClientException('Desciption must be provided');
+        }
+
+        $description = $this->string('extended') ?? '';
+        $tags        = self::parseTags();
+        $modified    = $this->string('dt')    ?? new Datetime;
+        $replace     = $this->bool('replace') ?? true;
+        $public      = $this->bool('shared')  ?? true;
+        $unread      = $this->bool('toread')  ?? false;
+
+        $result_code     = 'something went wrong';
+        [$pin, $existed] = Pin::checkExistingAndCreateOrUpdate(
+            args: [
+                'actor_id'    => $user->getId(),
+                'url_hash'    => hash('sha256', $url),
+                'url'         => $url,
+                'title'       => $title,
+                'description' => $description,
+                'replace'     => $replace,
+                'public'      => $public,
+                'unread'      => $unread,
+                'modified'    => $modified,
+            ],
+            find_by_keys: ['actor_id', 'url_hash'],
+        );
+
+        if ($existed) {
+            if (!$replace) {
+                $result_code = 'item already exists';
+            } else {
+                throw new ServerException('Updating is unimplemented'); // TODO delete old note, create new one
+                $this->deleteNoteAndMaybePin($user, $pin->getNote(), pin: null);
+            }
+        } else {
+            DB::persist($note = Note::create([
+                'actor_id'     => $user->getId(),
+                'content'      => $url,
+                'content_type' => 'text/uri-list',
+                'rendered'     => Formatting::twigRenderFile('pinboard/render.html.twig', ['url' => $url, 'title' => $title, 'description' => $description]),
+                'reply_to'     => null,
+                'is_local'     => true,
+                'source'       => self::SOURCE,
+                'scope'        => $public ? VisibilityScope::EVERYWHERE->value : VisibilityScope::ADDRESSEE->value,
+                'language_id'  => $user->getActor()->getTopLanguage()->getId(),
+                'type'         => 'page',
+                'title'        => $title,
+            ]));
+            $note->setUrl(Router::url('note_view', ['id' => $note->getId()], Router::ABSOLUTE_URL));
+            $pin->setNoteId($note->getId());
+            Conversation::assignLocalConversation($note, null);
+            DB::persist($pin);
+            // TODO handle tags
+            DB::flush();
+            $result_code = 'done';
+        }
+
+        return self::respond(['result_code' => $result_code]);
+    }
+
+    /**
+     * Delete a bookmark
+     */
+    public function posts_delete(Request $request)
+    {
+        $user = self::before($request);
+        $url  = $this->string('url');
+        if (\is_null($url)) {
+            throw new ClientException('URL must be provided');
+        }
+
+        $pin = DB::findOneBy(Pin::class, ['actor_id' => $user->getId(), 'url_hash' => hash('sha256', $url)], return_null: true);
+        if (\is_null($pin)) {
+            return self::respond(['result_code' => 'item not found']);
+        } else {
+            $this->deleteNoteAndMaybePin($user, $pin->getNote(), $pin);
+            return self::respond(['result_code' => 'done']);
+        }
+    }
+
+    /**
+     * Returns one or more posts on a single day matching the
+     * arguments. If no date or url is given, date of most recent
+     * bookmark will be used
+     */
+    public function posts_get(Request $request)
+    {
+        $user = self::before($request);
+        $tags = self::parseTags();
+        $day  = $this->string('dt');
+        $url  = $this->string('url');
+        $meta = $this->bool('meta');
+
+        if (!\is_null($tags) && $tags !== []) {
+            throw new ClientException(_m('tags attribute not implemented'));
+        }
+
+        if (\is_null($url) && \is_null($day)) {
+            $pins = DB::findBy(Pin::class, ['actor_id' => $user->getId(), 'gte' => ['modified' => new DateTimeImmutable('today')]]);
+        } elseif (!\is_null($day)) {
+            $day  = new DateTimeImmutable($day);
+            $pins = DB::findBy(Pin::class, ['actor_id' => $user->getId(), 'gte' => ['modified' => $day], 'lt' => ['modified' => $day->modify('+1 day')]]);
+        } elseif (!\is_null($url)) {
+            $pins = DB::findBy(Pin::class, ['actor_id' => $user->getId(), 'url_hash' => hash('sha256', $url)]);
+        } else {
+            throw new BugFoundException('Wonky logic in pinboard/posts/get');
+        }
+
+        return self::respond(self::formatPins($user, $pins));
+    }
+
+    /**
+     * Returns a list of the user's most recent posts, filtered by tag
+     */
+    public function posts_recent(Request $request)
+    {
+        $user  = self::before($request);
+        $tags  = self::parseTags();
+        $limit = min($this->int('count') ?? 15, 100);
+
+        if (!\is_null($tags) && $tags !== []) {
+            throw new ClientException('tags attribute not implemented');
+        }
+
+        $pins = DB::findBy(Pin::class, ['actor_id' => $user->getId()], order_by: ['modified' => 'asc'], limit: $limit);
+
+        return self::respond(self::formatPins($user, $pins));
+    }
+
+    /**
+     * Returns a list of dates with the number of posts at each date
+     */
+    public function posts_dates(Request $request)
+    {
+        return self::respond(['result_code' => 'unimplemented']);
+    }
+
+    /**
+     * Returns all bookmarks in the user's account
+     */
+    public function posts_all(Request $request)
+    {
+        $user       = self::before($request);
+        $tags       = self::parseTags();
+        $offset     = $this->int('start');
+        $limit      = $this->int('results');
+        $start_time = $this->string('fromdt');
+        $end_time   = $this->string('todt');
+        $meta       = $this->bool('meta');
+
+        if (!\is_null($tags) && $tags !== []) {
+            throw new ClientException('tags attribute not implemented');
+        }
+
+        $criteria = ['actor_id' => $user->getId()];
+        if (!\is_null($start_time)) {
+            $criteria['gte'] = ['modified' => new DateTimeImmutable($start_time)];
+        }
+        if (!\is_null($end_time)) {
+            $criteria['lt'] = ['modified' => new DateTimeImmutable($end_time)];
+        }
+
+        $pins = DB::findBy(Pin::class, $criteria, order_by: ['modified' => 'asc'], offset: $offset, limit: $limit);
+        return self::respond(self::formatPins($user, $pins)['posts']);
+    }
+}
diff --git a/plugins/Pinboard/Entity/Pin.php b/plugins/Pinboard/Entity/Pin.php
index 0883fa77d9..fe55653343 100644
--- a/plugins/Pinboard/Entity/Pin.php
+++ b/plugins/Pinboard/Entity/Pin.php
@@ -5,6 +5,10 @@ declare(strict_types = 1);
 namespace Plugin\Pinboard\Entity;
 
 use App\Core\Entity;
+use App\Entity\Actor;
+use App\Entity\LocalUser;
+use App\Entity\Note;
+use Component\Tag\Entity\NoteTag;
 use DateTimeInterface;
 
 class Pin extends Entity
@@ -15,6 +19,8 @@ class Pin extends Entity
     private int $actor_id;
     private string $url_hash;
     private string $url;
+    private string $title;
+    private ?string $description = null;
     private bool $replace;
     private bool $public;
     private bool $unread;
@@ -64,6 +70,28 @@ class Pin extends Entity
         return $this->url;
     }
 
+    public function setTitle(string $title): self
+    {
+        $this->title = $title;
+        return $this;
+    }
+
+    public function getTitle(): string
+    {
+        return $this->title;
+    }
+
+    public function setDescription(?string $description): self
+    {
+        $this->description = $description;
+        return $this;
+    }
+
+    public function getDescription(): ?string
+    {
+        return $this->description;
+    }
+
     public function setReplace(bool $replace): self
     {
         $this->replace = $replace;
@@ -111,21 +139,47 @@ class Pin extends Entity
     // @codeCoverageIgnoreEnd
     // }}} Autocode
 
+    public static function cacheKeys(int|LocalUser|Actor $user): array
+    {
+        $id = \is_int($user) ? $user : $user->getId();
+        return [
+            'last-modified' => "pinboard-pin-{$id}-last-modified",
+        ];
+    }
+
+    public function getNote(): Note
+    {
+        return Note::getById($this->getNoteId());
+    }
+
+    /**
+     * @return NoteTag[]
+     */
+    public function getTags(): array
+    {
+        return [];
+    }
+
     public static function schemaDef(): array
     {
         return [
             'name'   => 'pinboard_pin',
             'fields' => [
-                'note_id'  => ['type' => 'int',  'not null' => true, 'description' => 'Id of the note this pin created'],
-                'actor_id' => ['type' => 'int',  'not null' => true, 'description' => 'Actor who created this note'],
-                'url_hash' => ['type' => 'char', 'length' => 64, 'not null' => true, 'description' => 'Hash of the url, for indexing'],
-                'url'      => ['type' => 'text', 'not null' => true, 'description' => 'Plain URL this pin refers to (gets rendered in the corresponding note, useful for replace)'],
-                'replace'  => ['type' => 'bool', 'not null' => true, 'description' => 'Replace any existing bookmark with this URL. Default is yes. If set to no, will throw an error if bookmark exists'],
-                'public'   => ['type' => 'bool', 'not null' => true, 'description' => 'Whether private or public'],
-                'unread'   => ['type' => 'bool', 'not null' => true, 'description' => 'Has this been read'],
-                'modified' => ['type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'],
+                'note_id'     => ['type' => 'int',  'not null' => true, 'description' => 'Id of the note this pin created'],
+                'actor_id'    => ['type' => 'int',  'not null' => true, 'description' => 'Actor who created this note'],
+                'url_hash'    => ['type' => 'char', 'length' => 64, 'not null' => true, 'description' => 'Hash of the url, for indexing'],
+                'url'         => ['type' => 'text', 'not null' => true, 'description' => 'Plain URL this pin refers to (gets rendered in the corresponding note, useful for replace)'],
+                'title'       => ['type' => 'text', 'not null' => true, 'description' => 'Title given to this bookmark'],
+                'description' => ['type' => 'text', 'description' => 'Description given to this bookmark'],
+                'replace'     => ['type' => 'bool', 'not null' => true, 'description' => 'Replace any existing bookmark with this URL. Default is yes. If set to no, will throw an error if bookmark exists'],
+                'public'      => ['type' => 'bool', 'not null' => true, 'description' => 'Whether private or public'],
+                'unread'      => ['type' => 'bool', 'not null' => true, 'description' => 'Has this been read'],
+                'modified'    => ['type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'],
             ],
             'primary key' => ['actor_id', 'url_hash'],
+            'indexes'     => [
+                'actor_modified_idx' => ['actor_id', 'modified'],
+            ],
         ];
     }
 }
diff --git a/plugins/Pinboard/Pinboard.php b/plugins/Pinboard/Pinboard.php
index 2be31f214e..7a533cc6fd 100644
--- a/plugins/Pinboard/Pinboard.php
+++ b/plugins/Pinboard/Pinboard.php
@@ -44,13 +44,37 @@ class Pinboard extends Plugin
         $r->connect(
             'pinboard_posts_update',
             '/pinboard/v1/posts/update',
-            [C\API::class, 'posts_update'],
+            [C\APIv1::class, 'posts_update'],
         );
 
         $r->connect(
             'pinboard_posts_add',
             '/pinboard/v1/posts/add',
-            [C\API::class, 'posts_add'],
+            [C\APIv1::class, 'posts_add'],
+        );
+
+        $r->connect(
+            'pinboard_posts_delete',
+            '/pinboard/v1/posts/delete',
+            [C\APIv1::class, 'posts_delete'],
+        );
+
+        $r->connect(
+            'pinboard_posts_get',
+            '/pinboard/v1/posts/get',
+            [C\APIv1::class, 'posts_get'],
+        );
+
+        $r->connect(
+            'pinboard_posts_recent',
+            '/pinboard/v1/posts/recent',
+            [C\APIv1::class, 'posts_recent'],
+        );
+
+        $r->connect(
+            'pinboard_posts_all',
+            '/pinboard/v1/posts/all',
+            [C\APIv1::class, 'posts_all'],
         );
 
         return Event::next;
diff --git a/plugins/Pinboard/templates/pinboard/render.html.twig b/plugins/Pinboard/templates/pinboard/render.html.twig
index b6aea66eae..61013b1554 100644
--- a/plugins/Pinboard/templates/pinboard/render.html.twig
+++ b/plugins/Pinboard/templates/pinboard/render.html.twig
@@ -1,4 +1,5 @@
-<details>
-    <summary><a href="{{ url }}" rel="noopener noreferrer" title="{{ title }}"></a></summary> {# User provided title, do not translate #}
-    {{ description }} {# Likewise for the description, which may be empty#}
+<details class="details-summary-title">
+    <summary>{{ title }}</summary> {# User provided title, do not translate #}
+    <a href="{{ url }}" rel="noopener noreferrer">{{ url }}</a>
+    <p>{{ description }}</p> {# Likewise for the description, which may be empty #}
 </details>