diff --git a/sop-java/src/main/java/sop/operation/AbstractVerify.java b/sop-java/src/main/java/sop/operation/AbstractVerify.java
new file mode 100644
index 0000000..82582e1
--- /dev/null
+++ b/sop-java/src/main/java/sop/operation/AbstractVerify.java
@@ -0,0 +1,55 @@
+// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package sop.operation;
+
+import sop.exception.SOPGPException;
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+import java.util.Date;
+
+/**
+ * Common API methods shared between verification of inline signatures ({@link InlineVerify})
+ * and verification of detached signatures ({@link Verify}).
+ *
+ * @param <T> Builder type ({@link Verify}, {@link InlineVerify})
+ */
+public interface AbstractVerify<T> {
+
+    /**
+     * Makes the SOP implementation consider signatures before this date invalid.
+     *
+     * @param timestamp timestamp
+     * @return builder instance
+     */
+    T notBefore(Date timestamp) throws SOPGPException.UnsupportedOption;
+
+    /**
+     * Makes the SOP implementation consider signatures after this date invalid.
+     *
+     * @param timestamp timestamp
+     * @return builder instance
+     */
+    T notAfter(Date timestamp) throws SOPGPException.UnsupportedOption;
+
+    /**
+     * Add one or more verification cert.
+     *
+     * @param cert input stream containing the encoded certs
+     * @return builder instance
+     */
+    T cert(InputStream cert) throws SOPGPException.BadData;
+
+    /**
+     * Add one or more verification cert.
+     *
+     * @param cert byte array containing the encoded certs
+     * @return builder instance
+     */
+    default T cert(byte[] cert) throws SOPGPException.BadData {
+        return cert(new ByteArrayInputStream(cert));
+    }
+
+}
diff --git a/sop-java/src/main/java/sop/operation/InlineVerify.java b/sop-java/src/main/java/sop/operation/InlineVerify.java
new file mode 100644
index 0000000..3b8031d
--- /dev/null
+++ b/sop-java/src/main/java/sop/operation/InlineVerify.java
@@ -0,0 +1,50 @@
+// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package sop.operation;
+
+import sop.ReadyWithResult;
+import sop.Verification;
+import sop.exception.SOPGPException;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+
+/**
+ * API for verification of inline-signed messages.
+ */
+public interface InlineVerify extends AbstractVerify<InlineVerify> {
+
+    /**
+     * Provide the inline-signed data.
+     * The result can be used to write the plaintext message out and to get the verifications.
+     *
+     * @param data signed data
+     * @return list of signature verifications
+     *
+     * @throws IOException in case of an IO error
+     * @throws SOPGPException.NoSignature when no signature is found
+     * @throws SOPGPException.BadData when the data is invalid OpenPGP data
+     */
+    ReadyWithResult<List<Verification>> data(InputStream data)
+            throws IOException, SOPGPException.NoSignature, SOPGPException.BadData;
+
+    /**
+     * Provide the inline-signed data.
+     * The result can be used to write the plaintext message out and to get the verifications.
+     *
+     * @param data signed data
+     * @return list of signature verifications
+     *
+     * @throws IOException in case of an IO error
+     * @throws SOPGPException.NoSignature when no signature is found
+     * @throws SOPGPException.BadData when the data is invalid OpenPGP data
+     */
+    default ReadyWithResult<List<Verification>> data(byte[] data)
+            throws IOException, SOPGPException.NoSignature, SOPGPException.BadData {
+        return data(new ByteArrayInputStream(data));
+    }
+}
diff --git a/sop-java/src/main/java/sop/operation/Verify.java b/sop-java/src/main/java/sop/operation/Verify.java
index 1bf9fe0..d51affa 100644
--- a/sop-java/src/main/java/sop/operation/Verify.java
+++ b/sop-java/src/main/java/sop/operation/Verify.java
@@ -4,50 +4,18 @@
 
 package sop.operation;
 
-import java.io.ByteArrayInputStream;
-import java.io.InputStream;
-import java.util.Date;
-
 import sop.exception.SOPGPException;
 
-public interface Verify extends VerifySignatures {
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+
+/**
+ * API for verifying detached signatures.
+ */
+public interface Verify extends AbstractVerify<Verify>, VerifySignatures {
 
     /**
-     * Makes the SOP implementation consider signatures before this date invalid.
-     *
-     * @param timestamp timestamp
-     * @return builder instance
-     */
-    Verify notBefore(Date timestamp) throws SOPGPException.UnsupportedOption;
-
-    /**
-     * Makes the SOP implementation consider signatures after this date invalid.
-     *
-     * @param timestamp timestamp
-     * @return builder instance
-     */
-    Verify notAfter(Date timestamp) throws SOPGPException.UnsupportedOption;
-
-    /**
-     * Add one or more verification cert.
-     *
-     * @param cert input stream containing the encoded certs
-     * @return builder instance
-     */
-    Verify cert(InputStream cert) throws SOPGPException.BadData;
-
-    /**
-     * Add one or more verification cert.
-     *
-     * @param cert byte array containing the encoded certs
-     * @return builder instance
-     */
-    default Verify cert(byte[] cert) throws SOPGPException.BadData {
-        return cert(new ByteArrayInputStream(cert));
-    }
-
-    /**
-     * Provides the signatures.
+     * Provides the detached signatures.
      * @param signatures input stream containing encoded, detached signatures.
      *
      * @return builder instance
@@ -55,7 +23,7 @@ public interface Verify extends VerifySignatures {
     VerifySignatures signatures(InputStream signatures) throws SOPGPException.BadData;
 
     /**
-     * Provides the signatures.
+     * Provides the detached signatures.
      * @param signatures byte array containing encoded, detached signatures.
      *
      * @return builder instance
@@ -63,5 +31,4 @@ public interface Verify extends VerifySignatures {
     default VerifySignatures signatures(byte[] signatures) throws SOPGPException.BadData {
         return signatures(new ByteArrayInputStream(signatures));
     }
-
 }