diff --git a/data-wrapper/v1/csv.ini b/data-wrapper/v1/csv.ini
index e9ead95..6cc3eb2 100644
--- a/data-wrapper/v1/csv.ini
+++ b/data-wrapper/v1/csv.ini
@@ -50,9 +50,12 @@
 value = get(env('value', 'value'))
 
 [exchange]
-value = self().thru(x => _.env('slim') ? _.pick(x, ['id', 'value']) : x)
+value = self().thru(x => _.env(null, 'slim') ? _.pick(x, ['id', 'value']) : x)
 
 [TARDump]
 compress = true
 manifest = fix({version: '1'})
 manifest = fix({generator: 'v1/csv'})
+manifest = fix({parameters: _.omit(_.env(), 'headers')})
+manifest = fix({hostAgent: _.get(_.env(), 'headers.host')})
+manifest = fix({userAgent: _.get(_.env(), 'headers.user-agent')})
diff --git a/data-wrapper/v1/istex-tar-gz.ini b/data-wrapper/v1/istex-tar-gz.ini
index 95ef476..d72d223 100644
--- a/data-wrapper/v1/istex-tar-gz.ini
+++ b/data-wrapper/v1/istex-tar-gz.ini
@@ -32,7 +32,6 @@
 post.parameters.2.schema.default = true
 post.parameters.2.required = false
 
-
 [env]
 path = slim
 value = env('slim').thru(x => (x === 'false' ? false : true))
@@ -52,9 +51,12 @@
 value = get(env('value', 'abstract'))
 
 [exchange]
-value = self().thru(x => _.env('slim') ? _.pick(x, ['id', 'value']) : x)
+value = self().thru(x => _.env(null, 'slim') ? _.pick(x, ['id', 'value']) : x)
 
 [TARDump]
 compress = true
 manifest = fix({version: '1'})
 manifest = fix({generator: 'v1/istex-tar-gz'})
+manifest = fix({parameters: _.omit(_.env(), 'headers')})
+manifest = fix({hostAgent: _.get(_.env(), 'headers.host')})
+manifest = fix({userAgent: _.get(_.env(), 'headers.user-agent')})