diff --git a/package.json b/package.json
index fb0fbcee5..6a11af50d 100644
--- a/package.json
+++ b/package.json
@@ -134,6 +134,7 @@
             "redirect_uri",
             "request_uri",
             "response_type",
+            "source_url",
             "success_description",
             "token_type"
           ]
diff --git a/packages/endpoint-posts/includes/endpoint-posts-syndicate.njk b/packages/endpoint-posts/includes/endpoint-posts-syndicate.njk
index bd13eab3d..46e190213 100644
--- a/packages/endpoint-posts/includes/endpoint-posts-syndicate.njk
+++ b/packages/endpoint-posts/includes/endpoint-posts-syndicate.njk
@@ -6,14 +6,14 @@
   }) | indent(2) }}
 
   {{ input({
-    name: "redirectUri",
+    name: "syndication[redirect_uri]",
     type: "hidden",
     value: redirectUri
   }) | indent(2) }}
 
   {{ button({
     classes: "button--secondary button--small",
-    name: "url",
+    name: "syndication[source_url]",
     value: post.url,
     icon: "syndicate",
     text: __("posts.post.syndicate")
diff --git a/packages/endpoint-syndicate/README.md b/packages/endpoint-syndicate/README.md
index fca0319ae..b81210baa 100644
--- a/packages/endpoint-syndicate/README.md
+++ b/packages/endpoint-syndicate/README.md
@@ -28,4 +28,4 @@ Add `@indiekit/endpoint-syndicate` to your list of plug-ins, specifying options
 ## Supported endpoint queries
 
 - Access token (required): `/syndicate?token=XXXXXXX`
-- URL to syndicate: `/syndicate?token=XXXXXXX&url=https%3A%2F%2Fwebsite.example%2Fposts%2F1`
+- URL to syndicate: `/syndicate?token=XXXXXXX&source_url=https%3A%2F%2Fwebsite.example%2Fposts%2F1`
diff --git a/packages/endpoint-syndicate/lib/controllers/syndicate.js b/packages/endpoint-syndicate/lib/controllers/syndicate.js
index d5d383f65..8a8215926 100644
--- a/packages/endpoint-syndicate/lib/controllers/syndicate.js
+++ b/packages/endpoint-syndicate/lib/controllers/syndicate.js
@@ -7,8 +7,10 @@ export const syndicateController = {
     try {
       const { application, publication } = request.app.locals;
       const token = request.query.token || request.body.token;
-      const url = request.query.url || request.body.url;
-      const redirectUri = request.query.redirectUri || request.body.redirectUri;
+      const sourceUrl =
+        request.query.source_url || request.body.syndication?.source_url;
+      const redirectUri =
+        request.query.redirect_uri || request.body.syndication?.redirect_uri;
 
       if (!application.hasDatabase) {
         throw IndiekitError.notImplemented(
@@ -26,12 +28,12 @@ export const syndicateController = {
       }
 
       // Get post data
-      const postData = await getPostData(publication, url);
+      const postData = await getPostData(publication, sourceUrl);
 
-      if (!postData && url) {
+      if (!postData && sourceUrl) {
         return response.json({
           success: "OK",
-          success_description: `No post record available for ${url}`,
+          success_description: `No post record available for ${sourceUrl}`,
         });
       }
 
diff --git a/packages/endpoint-syndicate/tests/integration/200-no-post-record-for-url.js b/packages/endpoint-syndicate/tests/integration/200-no-post-record-for-url.js
index 748bcb4d4..ee2acc768 100644
--- a/packages/endpoint-syndicate/tests/integration/200-no-post-record-for-url.js
+++ b/packages/endpoint-syndicate/tests/integration/200-no-post-record-for-url.js
@@ -12,7 +12,7 @@ test("Returns no post record for URL", async (t) => {
     .post("/syndicate")
     .auth(testToken(), { type: "bearer" })
     .set("accept", "application/json")
-    .query({ url: "https://website.example/notes/foobar/" });
+    .query({ source_url: "https://website.example/notes/foobar/" });
 
   t.is(result.status, 200);
   t.is(
diff --git a/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-target.js b/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-target.js
index 5787fca22..4d0eb5c00 100644
--- a/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-target.js
+++ b/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-target.js
@@ -29,7 +29,7 @@ test("Syndicates a URL", async (t) => {
   const result = await request
     .post("/syndicate")
     .set("accept", "application/json")
-    .query({ url: "https://website.example/notes/foobar/" })
+    .query({ source_url: "https://website.example/notes/foobar/" })
     .query({ token: testToken() });
 
   t.is(result.status, 200);
diff --git a/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-targets-one-fail.js b/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-targets-one-fail.js
index c471654f4..aade8e25c 100644
--- a/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-targets-one-fail.js
+++ b/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-targets-one-fail.js
@@ -41,7 +41,7 @@ test("Syndicates a URL", async (t) => {
   const result = await request
     .post("/syndicate")
     .set("accept", "application/json")
-    .query({ url: "https://website.example/notes/foobar/" })
+    .query({ source_url: "https://website.example/notes/foobar/" })
     .query({ token: testToken() });
 
   t.is(result.status, 200);
diff --git a/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-targets.js b/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-targets.js
index fe479a7ad..168857755 100644
--- a/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-targets.js
+++ b/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-targets.js
@@ -48,7 +48,7 @@ test("Syndicates a URL", async (t) => {
   const result = await request
     .post("/syndicate")
     .set("accept", "application/json")
-    .query({ url: "https://website.example/notes/foobar/" })
+    .query({ source_url: "https://website.example/notes/foobar/" })
     .query({ token: testToken() });
 
   t.is(result.status, 200);
diff --git a/packages/endpoint-syndicate/tests/integration/200-target-error.js b/packages/endpoint-syndicate/tests/integration/200-target-error.js
index 7da9327ed..1e5225c82 100644
--- a/packages/endpoint-syndicate/tests/integration/200-target-error.js
+++ b/packages/endpoint-syndicate/tests/integration/200-target-error.js
@@ -29,7 +29,7 @@ test("Returns 500 error syndicating URL", async (t) => {
   const result = await request
     .post("/syndicate")
     .set("accept", "application/json")
-    .query({ url: "https://website.example/notes/foobar/" })
+    .query({ source_url: "https://website.example/notes/foobar/" })
     .query({ token: testToken() });
 
   t.is(result.status, 200);
diff --git a/packages/endpoint-syndicate/tests/integration/302-syndicates-url-for-target-redirect.js b/packages/endpoint-syndicate/tests/integration/302-syndicates-url-for-target-redirect.js
index 52bd94da6..6e68575db 100644
--- a/packages/endpoint-syndicate/tests/integration/302-syndicates-url-for-target-redirect.js
+++ b/packages/endpoint-syndicate/tests/integration/302-syndicates-url-for-target-redirect.js
@@ -29,8 +29,12 @@ test("Syndicates a URL", async (t) => {
   const result = await request
     .post("/syndicate")
     .set("accept", "application/json")
-    .send({ url: "https://website.example/notes/foobar/" })
-    .send({ redirectUri: "/posts/12345" })
+    .send({
+      syndication: {
+        url: "https://website.example/notes/foobar/",
+        redirect_uri: "/posts/12345",
+      },
+    })
     .send({ token: testToken() });
 
   t.is(result.status, 302);