diff --git a/.gitignore b/.gitignore
index 59d842b..ba41a74 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,3 +26,5 @@ node_modules
 
 # Users Environment Variables
 .lock-wscript
+
+codes-postaux.json
diff --git a/api.js b/api.js
new file mode 100644
index 0000000..f2b696a
--- /dev/null
+++ b/api.js
@@ -0,0 +1,8 @@
+var _ = require('lodash');
+var data = require('./codes-postaux.json');
+var index = _.groupBy(data, 'codePostal');
+
+exports.listByCodePostal = function(codePostal) {
+    var key = codePostal.toString();
+    return (key in index) ? index[key] : [];
+};
diff --git a/import-data.js b/import-data.js
new file mode 100644
index 0000000..c40d44f
--- /dev/null
+++ b/import-data.js
@@ -0,0 +1,20 @@
+var request = require('request');
+var parse = require('csv-parse');
+var JSONStream = require('JSONStream');
+var fs = require('fs');
+
+var sourceFile = 'https://www.data.gouv.fr/s/resources/base-officielle-des-codes-postaux/20141106-120608/code_postaux_v201410.csv';
+
+// Override first line
+var columns = function() {
+    return ['codeInsee', 'nomCommune', 'codePostal', 'libelleAcheminement'];
+};
+
+// Request source file
+request(sourceFile)
+    // Parse CSV as Object
+    .pipe(parse({ delimiter: ';', trim: true, columns: columns }))
+    // Turn into JSON Array String
+    .pipe(JSONStream.stringify())
+    // Output
+    .pipe(fs.createWriteStream(__dirname + '/codes-postaux.json'));
diff --git a/package.json b/package.json
index 91b0e6a..e995481 100644
--- a/package.json
+++ b/package.json
@@ -15,5 +15,14 @@
   "bugs": {
     "url": "https://github.com/sgmap/codes-postaux/issues"
   },
-  "homepage": "https://github.com/sgmap/codes-postaux"
+  "homepage": "https://github.com/sgmap/codes-postaux",
+  "main": "api",
+  "dependencies": {
+    "lodash": "^2.4.1"
+  },
+  "devDependencies": {
+    "JSONStream": "^0.9.0",
+    "csv-parse": "0.0.6",
+    "request": "^2.48.0"
+  }
 }