diff --git a/apps/files_sharing/lib/Controller/ShareAPIController.php b/apps/files_sharing/lib/Controller/ShareAPIController.php
index 069cba42bb6d1..de055b1987587 100644
--- a/apps/files_sharing/lib/Controller/ShareAPIController.php
+++ b/apps/files_sharing/lib/Controller/ShareAPIController.php
@@ -317,6 +317,14 @@ protected function formatShare(IShare $share, Node $recipientNode = null): array
 				$result = array_merge($result, $this->getDeckShareHelper()->formatShare($share));
 			} catch (QueryException $e) {
 			}
+		} elseif ($share->getShareType() === IShare::TYPE_SCIENCEMESH) {
+			$result['share_with'] = $share->getSharedWith();
+			$result['share_with_displayname'] = '';
+
+			try {
+				$result = array_merge($result, $this->getScienceMeshShareHelper()->formatShare($share));
+			} catch (QueryException $e) {
+			}
 		}
 
 
@@ -662,6 +670,12 @@ public function createShare(
 			} catch (QueryException $e) {
 				throw new OCSForbiddenException($this->l->t('Sharing %s failed because the back end does not support room shares', [$node->getPath()]));
 			}
+		} elseif ($shareType === IShare::TYPE_SCIENCEMESH) {
+			try {
+				$this->getScienceMeshShareHelper()->createShare($share, $shareWith, $permissions, $expireDate);
+			} catch (QueryException $e) {
+				throw new OCSForbiddenException($this->l->t('Sharing %s failed because the back end does not support sciencemesh shares', [$path->getPath()]));
+			}
 		} else {
 			throw new OCSBadRequestException($this->l->t('Unknown share type'));
 		}
@@ -1567,6 +1581,15 @@ private function getShareById(string $id): IShare {
 			// Do nothing, just try the other share type
 		}
 
+		try {
+			if ($this->shareManager->shareProviderExists(IShare::TYPE_SCIENCEMESH)) {
+				$share = $this->shareManager->getShareById('sciencemesh:' . $id, $this->currentUser);
+				return $share;
+			}
+		} catch (ShareNotFound $e) {
+			// Do nothing, just try the other share type
+		}
+
 		if (!$this->shareManager->outgoingServer2ServerSharesAllowed()) {
 			throw new ShareNotFound();
 		}
@@ -1630,6 +1653,23 @@ private function getDeckShareHelper() {
 		return $this->serverContainer->get('\OCA\Deck\Sharing\ShareAPIHelper');
 	}
 
+	/**
+	 * Returns the helper of ShareAPIHelper for sciencemesh shares.
+	 *
+	 * If the ScienceMesh application is not enabled or the helper is not available
+	 * a QueryException is thrown instead.
+	 *
+	 * @return \OCA\ScienceMesh\ShareProvider\ShareAPIHelper
+	 * @throws QueryException
+	 */
+	private function getScienceMeshShareHelper() {
+		if (!$this->appManager->isEnabledForUser('sciencemesh')) {
+			throw new QueryException();
+		}
+
+		return $this->serverContainer->get('\OCA\ScienceMesh\ShareProvider\ShareAPIHelper');
+	}
+
 	/**
 	 * @param string $viewer
 	 * @param Node $node
@@ -1645,7 +1685,8 @@ private function getSharesFromNode(string $viewer, $node, bool $reShares): array
 			IShare::TYPE_EMAIL,
 			IShare::TYPE_CIRCLE,
 			IShare::TYPE_ROOM,
-			IShare::TYPE_DECK
+			IShare::TYPE_DECK,
+			IShare::TYPE_SCIENCEMESH
 		];
 
 		// Should we assume that the (currentUser) viewer is the owner of the node !?
@@ -1800,6 +1841,9 @@ private function getAllShares(?Node $path = null, bool $reshares = false) {
 
 		$deckShares = $this->shareManager->getSharesBy($this->currentUser, IShare::TYPE_DECK, $path, $reshares, -1, 0);
 
+		// SCIENCEMESH SHARES
+		$scienceMeshShares = $this->shareManager->getSharesBy($this->currentUser, IShare::TYPE_SCIENCEMESH, $path, $reshares, -1, 0);
+
 		// FEDERATION
 		if ($this->shareManager->outgoingServer2ServerSharesAllowed()) {
 			$federatedShares = $this->shareManager->getSharesBy($this->currentUser, IShare::TYPE_REMOTE, $path, $reshares, -1, 0);
@@ -1812,7 +1856,7 @@ private function getAllShares(?Node $path = null, bool $reshares = false) {
 			$federatedGroupShares = [];
 		}
 
-		return array_merge($userShares, $groupShares, $linkShares, $mailShares, $circleShares, $roomShares, $deckShares, $federatedShares, $federatedGroupShares);
+		return array_merge($userShares, $groupShares, $linkShares, $mailShares, $circleShares, $roomShares, $deckShares, $federatedShares, $federatedGroupShares, $scienceMeshShares);
 	}
 
 
diff --git a/lib/private/Share20/Manager.php b/lib/private/Share20/Manager.php
index 3fca9e3fe149b..315bed9692585 100644
--- a/lib/private/Share20/Manager.php
+++ b/lib/private/Share20/Manager.php
@@ -211,43 +211,47 @@ protected function verifyPassword($password) {
 	 * @suppress PhanUndeclaredClassMethod
 	 */
 	protected function generalCreateChecks(IShare $share) {
-		if ($share->getShareType() === IShare::TYPE_USER) {
-			// We expect a valid user as sharedWith for user shares
-			if (!$this->userManager->userExists($share->getSharedWith())) {
-				throw new \InvalidArgumentException('SharedWith is not a valid user');
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_GROUP) {
-			// We expect a valid group as sharedWith for group shares
-			if (!$this->groupManager->groupExists($share->getSharedWith())) {
-				throw new \InvalidArgumentException('SharedWith is not a valid group');
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_LINK) {
-			// No check for TYPE_EMAIL here as we have a recipient for them
-			if ($share->getSharedWith() !== null) {
-				throw new \InvalidArgumentException('SharedWith should be empty');
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_EMAIL) {
-			if ($share->getSharedWith() === null) {
-				throw new \InvalidArgumentException('SharedWith should not be empty');
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_REMOTE) {
-			if ($share->getSharedWith() === null) {
-				throw new \InvalidArgumentException('SharedWith should not be empty');
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_REMOTE_GROUP) {
-			if ($share->getSharedWith() === null) {
-				throw new \InvalidArgumentException('SharedWith should not be empty');
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_CIRCLE) {
-			$circle = \OCA\Circles\Api\v1\Circles::detailsCircle($share->getSharedWith());
-			if ($circle === null) {
-				throw new \InvalidArgumentException('SharedWith is not a valid circle');
-			}
-		} elseif ($share->getShareType() === IShare::TYPE_ROOM) {
-		} elseif ($share->getShareType() === IShare::TYPE_DECK) {
-		} else {
-			// We cannot handle other types yet
-			throw new \InvalidArgumentException('unknown share type');
+		$shareType = $share->getShareType();
+		if (!$this->factory->getProviderForType($shareType)) {
+			// We can't handle other types yet
+			throw new \InvalidArgumentException('unknown share type, no provider found');
+		}
+
+		// verify sharedWith for this share type;
+		switch ($shareType) {
+			case IShare::TYPE_USER:
+				// We expect a valid user as sharedWith for user shares
+				if (!$this->userManager->userExists($share->getSharedWith())) {
+					throw new \InvalidArgumentException('SharedWith is not a valid user');
+				}
+			break;
+			case IShare::TYPE_GROUP:
+				// We expect a valid group as sharedWith for group shares
+				if (!$this->groupManager->groupExists($share->getSharedWith())) {
+					throw new \InvalidArgumentException('SharedWith is not a valid group');
+				}
+			break;
+			case IShare::TYPE_LINK:
+				if ($share->getSharedWith() !== null) {
+					throw new \InvalidArgumentException('SharedWith should be empty');
+				}
+			break;
+			case IShare::TYPE_REMOTE:
+			case IShare::TYPE_REMOTE_GROUP:
+			case IShare::TYPE_EMAIL:
+				if ($share->getSharedWith() === null) {
+					throw new \InvalidArgumentException('SharedWith should not be empty');
+				}
+			break;
+			case IShare::TYPE_CIRCLE:
+				$circle = \OCA\Circles\Api\v1\Circles::detailsCircle($share->getSharedWith());
+				if ($circle === null) {
+					throw new \InvalidArgumentException('SharedWith is not a valid circle');
+				}
+			break;
+			default:
+				// no checks by default;
+			break;
 		}
 
 		// Verify the initiator of the share is set
diff --git a/lib/private/Share20/ProviderFactory.php b/lib/private/Share20/ProviderFactory.php
index 42677d6bcf7f1..3da872c5e4c19 100644
--- a/lib/private/Share20/ProviderFactory.php
+++ b/lib/private/Share20/ProviderFactory.php
@@ -308,25 +308,49 @@ public function getProvider($id) {
 	 */
 	public function getProviderForType($shareType) {
 		$provider = null;
-
-		if ($shareType === IShare::TYPE_USER ||
-			$shareType === IShare::TYPE_GROUP ||
-			$shareType === IShare::TYPE_LINK
-		) {
-			$provider = $this->defaultShareProvider();
-		} elseif ($shareType === IShare::TYPE_REMOTE || $shareType === IShare::TYPE_REMOTE_GROUP) {
-			$provider = $this->federatedShareProvider();
-		} elseif ($shareType === IShare::TYPE_EMAIL) {
-			$provider = $this->getShareByMailProvider();
-		} elseif ($shareType === IShare::TYPE_CIRCLE) {
-			$provider = $this->getShareByCircleProvider();
-		} elseif ($shareType === IShare::TYPE_ROOM) {
-			$provider = $this->getRoomShareProvider();
-		} elseif ($shareType === IShare::TYPE_DECK) {
-			$provider = $this->getProvider('deck');
+		
+		switch ($shareType) {
+			case IShare::TYPE_USER:
+			case IShare::TYPE_GROUP:
+			case IShare::TYPE_LINK:
+				$provider = $this->defaultShareProvider();
+			break;
+			case IShare::TYPE_REMOTE:
+			case IShare::TYPE_REMOTE_GROUP:
+				$provider = $this->federatedShareProvider();
+			break;
+			case IShare::TYPE_EMAIL:
+				$provider = $this->getShareByMailProvider();
+			break;
+			case IShare::TYPE_CIRCLE:
+				$provider = $this->getShareByCircleProvider();
+			break;
+			case IShare::TYPE_ROOM:
+				$provider = $this->getRoomShareProvider();
+			break;
+			case IShare::TYPE_DECK:
+				$provider = $this->getProvider('deck');
+			break;
+//			case IShare::TYPE_SCIENCEMESH:
+//				$provider = $this->getProvider('sciencemesh');
+//			break;
+			default:
+				// try to autodetect in the registered providers;
+				foreach ($this->registeredShareProviders as $shareProvider) {
+					/** @var IShareProvider $instance */
+					$instance = $this->serverContainer->get($shareProvider);
+
+					// not all instances will have the isShareTypeSupported function;
+					if (method_exists($instance, "isShareTypeSupported")) {
+						if ($instance->isShareTypeSupported($shareType)) {
+							$provider = $this->getProvider($instance->identifier());
+							break;
+						}
+					}
+				}
+			break;
 		}
 
-
 		if ($provider === null) {
 			throw new ProviderException('No share provider for share type ' . $shareType);
 		}
diff --git a/lib/public/Share/IShare.php b/lib/public/Share/IShare.php
index 8ff3f5f0394ea..afe837e4a707b 100644
--- a/lib/public/Share/IShare.php
+++ b/lib/public/Share/IShare.php
@@ -116,6 +116,11 @@ interface IShare {
 	 */
 	public const TYPE_DECK_USER = 13;
 
+	/**
+	 * @since ?
+	 */
+	public const TYPE_SCIENCEMESH = 1000;
+	
 	/**
 	 * @since 18.0.0
 	 */