diff --git a/server/src/at_record_server/discogs_client.gleam b/server/src/at_record_server/discogs_client.gleam
index fa79f4c..2552d85 100644
--- a/server/src/at_record_server/discogs_client.gleam
+++ b/server/src/at_record_server/discogs_client.gleam
@@ -3,6 +3,7 @@
 //// into a flat shape the frontend can drop straight into the add form.
 
 import at_record/gen/defs
+import at_record_server/user_agent
 import gleam/dynamic/decode
 import gleam/http
 import gleam/http/request.{type Request}
@@ -17,8 +18,6 @@ import wisp
 
 const host = "api.discogs.com"
 
-const user_agent = "at-record/0.1"
-
 pub type Release {
   Release(
     discogs_id: Int,
@@ -104,7 +103,7 @@ pub fn search(
     |> request.set_host(host)
     |> request.set_path("/database/search")
     |> request.set_query(params)
-    |> request.set_header("user-agent", user_agent)
+    |> request.set_header("user-agent", user_agent.value)
   let req = case auth {
     Some(Auth(key, secret)) ->
       request.set_header(
@@ -140,7 +139,7 @@ pub fn search_by_barcode(
     |> request.set_host(host)
     |> request.set_path("/database/search")
     |> request.set_query([#("barcode", barcode), #("per_page", "5")])
-    |> request.set_header("user-agent", user_agent)
+    |> request.set_header("user-agent", user_agent.value)
   let req = case auth {
     Some(Auth(key, secret)) ->
       request.set_header(
@@ -309,7 +308,7 @@ pub fn release_details(
     |> request.set_scheme(http.Https)
     |> request.set_host(host)
     |> request.set_path("/releases/" <> int.to_string(discogs_id))
-    |> request.set_header("user-agent", user_agent)
+    |> request.set_header("user-agent", user_agent.value)
   let req = case auth {
     Some(Auth(key, secret)) ->
       request.set_header(
@@ -447,7 +446,7 @@ pub fn collection_page(
       #("per_page", "100"),
       #("page", int.to_string(page)),
     ])
-    |> request.set_header("user-agent", user_agent)
+    |> request.set_header("user-agent", user_agent.value)
     |> request.set_header("authorization", authorization)
 
   case send(req) {
@@ -521,7 +520,7 @@ pub fn wantlist_page(
       #("per_page", "100"),
       #("page", int.to_string(page)),
     ])
-    |> request.set_header("user-agent", user_agent)
+    |> request.set_header("user-agent", user_agent.value)
     |> request.set_header("authorization", authorization)
 
   case send(req) {
diff --git a/server/src/at_record_server/discogs_oauth.gleam b/server/src/at_record_server/discogs_oauth.gleam
index ff328dc..6c0ce74 100644
--- a/server/src/at_record_server/discogs_oauth.gleam
+++ b/server/src/at_record_server/discogs_oauth.gleam
@@ -4,6 +4,7 @@
 
 import at_record_server/clock
 import at_record_server/discogs_client.{type Auth, type Sender, Auth}
+import at_record_server/user_agent
 import gleam/bit_array
 import gleam/crypto
 import gleam/dynamic/decode
@@ -19,8 +20,6 @@ import gleam/uri
 
 const api_host = "api.discogs.com"
 
-const user_agent = "at-record/0.1"
-
 pub type TokenPair {
   TokenPair(token: String, secret: String)
 }
@@ -155,7 +154,7 @@ pub fn api_request(
     |> request.set_scheme(http.Https)
     |> request.set_host(api_host)
     |> request.set_path(path)
-    |> request.set_header("user-agent", user_agent)
+    |> request.set_header("user-agent", user_agent.value)
   case query {
     [] -> base
     _ -> request.set_query(base, query)
diff --git a/server/src/at_record_server/musicbrainz_client.gleam b/server/src/at_record_server/musicbrainz_client.gleam
index 05f0c8d..d9844a4 100644
--- a/server/src/at_record_server/musicbrainz_client.gleam
+++ b/server/src/at_record_server/musicbrainz_client.gleam
@@ -8,6 +8,7 @@ import at_record_server/catalog_deps.{
   type MbArtistCredit, type MbRelease, MbArtistCredit, MbRelease,
 }
 import at_record_server/discogs_client
+import at_record_server/user_agent
 import atproto/xrpc.{type Client}
 import gleam/dynamic/decode
 import gleam/erlang/process
@@ -23,8 +24,6 @@ import wisp
 
 const host = "musicbrainz.org"
 
-const user_agent = "at-record/0.1 (https://tangled.org/@mokkenstorm.dev/at-record)"
-
 /// A resolved MusicBrainz release plus whatever artist credits rode along in
 /// the same response, so artist minting can source MBIDs without a second
 /// MB call.
@@ -220,7 +219,7 @@ fn barcode_request(barcode: String) -> Request(String) {
     #("fmt", "json"),
     #("limit", "1"),
   ])
-  |> request.set_header("user-agent", user_agent)
+  |> request.set_header("user-agent", user_agent.value)
 }
 
 fn url_relation_request(discogs_id: Int) -> Request(String) {
@@ -236,7 +235,7 @@ fn url_relation_request(discogs_id: Int) -> Request(String) {
     #("inc", "release-rels+artist-credits"),
     #("fmt", "json"),
   ])
-  |> request.set_header("user-agent", user_agent)
+  |> request.set_header("user-agent", user_agent.value)
 }
 
 /// The first exact-match (`score` 100) release in a barcode search response,
diff --git a/server/src/at_record_server/user_agent.gleam b/server/src/at_record_server/user_agent.gleam
new file mode 100644
index 0000000..c5a69f2
--- /dev/null
+++ b/server/src/at_record_server/user_agent.gleam
@@ -0,0 +1,5 @@
+//// The outbound User-Agent for third-party APIs (Discogs, MusicBrainz), with
+//// contact info per their etiquette guidelines. One source of truth so the
+//// clients never drift.
+
+pub const value = "at-record/0.1 (https://tangled.org/@mokkenstorm.dev/at-record; niels@mokkenstorm.dev; https://bsky.app/profile/mokkenstorm.dev)"