diff --git a/biblio-tools/v1/unpaywall/is_oa.ini b/biblio-tools/v1/unpaywall/is_oa.ini
index bbde4e9..1dac132 100644
--- a/biblio-tools/v1/unpaywall/is_oa.ini
+++ b/biblio-tools/v1/unpaywall/is_oa.ini
@@ -1,3 +1,10 @@
+# OpenAPI Documentation - JSON format (dot notation)
+post.responses.default.description = Return a JSON, composed of `id`, `value`, where value is a DOI
+post.responses.default.content.application/json.schema.$ref = #/components/schemas/JSONStream
+post.summary = Check if DOI is an open access reference
+post.requestBody.required = true
+post.requestBody.content.application/json.schema.$ref = #/components/schemas/JSONStream
+
 # Necessary plugins
 [use]
 plugin = basics
@@ -15,6 +22,9 @@
 path = indent
 value = true
 
+path = token
+value = env('UNPAYWALL_API_KEY')
+
 
 # Pour traiter par lot on groupe puis on utilise spawn qui crée un buffer par lot
 [group]
@@ -47,7 +57,7 @@
 
 [spawn/combine/URLStream]
 url = https://unpaywall.inist.fr/api/graphql
-header = fix('x-api-key:', env('UNPAYWALL_API_KEY')).join(' ')
+header = env('token').prepend('x-api-key:')
 path = data.GetByDOI.*
 timeout = 5000
 noerror = false