diff --git a/src/server/token/TokenStore.ts b/src/server/token/store/PersistentTokenStore.ts
similarity index 96%
rename from src/server/token/TokenStore.ts
rename to src/server/token/store/PersistentTokenStore.ts
index 23ff313..6f4d871 100644
--- a/src/server/token/TokenStore.ts
+++ b/src/server/token/store/PersistentTokenStore.ts
@@ -1,5 +1,5 @@
 /**
- * Token management
+ * Persistent token management
  *
  *  Copyright (C) 2010-2019 R-T Specialty, LLC.
  *
@@ -27,14 +27,15 @@ import {
     TokenStateAcceptable,
     TokenStateDeadable,
     TokenStateDoneable,
-} from "./Token";
+} from "../Token";
 
-import { TokenDao, TokenData } from "./TokenDao";
-import { DocumentId } from "../../document/Document";
+import { TokenStore } from "./TokenStore";
+import { TokenDao, TokenData } from "../TokenDao";
+import { DocumentId } from "../../../document/Document";
 
 
 /**
- * Token storage
+ * Persistent token storage
  *
  * This store is used to create, read, and modify tokens.  Its API is
  * designed to constrain state transitions at compile-time.
@@ -86,7 +87,7 @@ import { DocumentId } from "../../document/Document";
  *
  * For more information on tokens, see `Token`.
  */
-export class TokenStore
+export class PersistentTokenStore implements TokenStore
 {
     /**
      * Initialize store
diff --git a/src/server/token/store/TokenStore.ts b/src/server/token/store/TokenStore.ts
new file mode 100644
index 0000000..3ef9f13
--- /dev/null
+++ b/src/server/token/store/TokenStore.ts
@@ -0,0 +1,120 @@
+/**
+ * Token management
+ *
+ *  Copyright (C) 2010-2019 R-T Specialty, LLC.
+ *
+ *  This file is part of the Liza Data Collection Framework.
+ *
+ *  liza is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero 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 Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import {
+    Token,
+    TokenId,
+    TokenState,
+    TokenStateAcceptable,
+    TokenStateDeadable,
+    TokenStateDoneable,
+} from "../Token";
+
+
+/**
+ * Token storage
+ *
+ * This store is used to create, read, and modify tokens.  Its API is
+ * designed to constrain state transitions at compile-time.
+ */
+export interface TokenStore
+{
+    /**
+     * Look up an existing token by id
+     *
+     * This looks up the given token id `token_id` for the document,
+     * constrained to this store's namespace and document id.
+     *
+     * The state of the returned token cannot be determined until runtime,
+     * so the caller is responsible for further constraining the type.
+     *
+     * @param token_id token id
+     *
+     * @return requested token, if it exists
+     */
+    lookupToken( token_id: TokenId ): Promise<Token<TokenState>>;
+
+
+    /**
+     * Create a new token for the given document within the store's
+     * namespace
+     *
+     * The returned token will always be `ACTIVE` and will always have
+     * `last_mistmatch` set.
+     */
+    createToken(): Promise<Token<TokenState.ACTIVE>>;
+
+
+    /**
+     * Complete a token
+     *
+     * Completing a token places it into a `DONE` state.  Only certain
+     * types of tokens can be completed (`TokenStateDoneable`).
+     *
+     * A token that in a `DONE` state means that processing has completed
+     * and is waiting acknowledgement from the system responsible for
+     * handling the response.
+     *
+     * @param src  token to complete
+     * @param data optional response data
+     *
+     * @return token in `DONE` state
+     */
+    completeToken( src: Token<TokenStateDoneable>, data: string | null ):
+        Promise<Token<TokenState.DONE>>;
+
+
+    /**
+     * Acknowledge a token as accepted
+     *
+     * Accepting a token places it into an `ACCEPTED` state.  Only certain
+     * types of tokens can be accepted (`TokenStateAcceptable`).
+     *
+     * A token that in an `ACCEPTED` state means that a previously completed
+     * token has been acknowledged and all resources related to the
+     * processing of the token can be freed.
+     *
+     * @param src  token to accept
+     * @param data optional accept reason
+     *
+     * @return token in `ACCEPTED` state
+     */
+    acceptToken( src: Token<TokenStateAcceptable>, data: string | null ):
+        Promise<Token<TokenState.ACCEPTED>>;
+
+
+    /**
+     * Kill a token
+     *
+     * Killing a token places it into a `DEAD` state.  Only certain types of
+     * tokens can be killed (`TokenStateDeadable`).
+     *
+     * A token that in a `DEAD` state means that any processing related to
+     * that token should be aborted.
+     *
+     * @param src  token to kill
+     * @param data optional kill reason
+     *
+     * @return token in `DEAD` state
+     */
+    killToken( src: Token<TokenStateDeadable>, data: string | null ):
+        Promise<Token<TokenState.DEAD>>;
+}
diff --git a/test/server/token/TokenStoreTest.ts b/test/server/token/store/PersistentTokenStoreTest.ts
similarity index 97%
rename from test/server/token/TokenStoreTest.ts
rename to test/server/token/store/PersistentTokenStoreTest.ts
index 9ed12a8..ff2409b 100644
--- a/test/server/token/TokenStoreTest.ts
+++ b/test/server/token/store/PersistentTokenStoreTest.ts
@@ -1,5 +1,5 @@
 /**
- * Tests token management
+ * Tests persistent token management
  *
  *  Copyright (C) 2010-2019 R-T Specialty, LLC.
  *
@@ -19,22 +19,25 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-import { TokenStore as Sut } from "../../../src/server/token/TokenStore";
-import { TokenDao, TokenData } from "../../../src/server/token/TokenDao";
-import { DocumentId } from "../../../src/document/Document";
+import {
+    PersistentTokenStore as Sut
+} from "../../../../src/server/token/store/PersistentTokenStore";
+
+import { TokenDao, TokenData } from "../../../../src/server/token/TokenDao";
+import { DocumentId } from "../../../../src/document/Document";
 
 import {
     Token,
     TokenId,
     TokenNamespace,
     TokenState,
-} from "../../../src/server/token/Token";
+} from "../../../../src/server/token/Token";
 
 import { expect, use as chai_use } from 'chai';
 chai_use( require( 'chai-as-promised' ) );
 
 
-describe( 'TokenStore', () =>
+describe( 'PersistentTokenStore', () =>
 {
     // required via the ctor, but this name is just used to denote that it's
     // not used for a particular test