diff --git a/service/configurations/Interpolation.js b/service/configurations/Interpolation.js
new file mode 100644
index 00000000..1bb08d77
--- /dev/null
+++ b/service/configurations/Interpolation.js
@@ -0,0 +1,30 @@
+'use strict';
+
+const url = require('url');
+
+const _ = require('lodash');
+
+const ServiceConfiguration = require('pelias-microservice-wrapper').ServiceConfiguration;
+
+class Language extends ServiceConfiguration {
+  constructor(o) {
+    super('interpolation', o);
+  }
+
+  getParameters(req, hit) {
+    return {
+      number: req.clean.parsed_text.number,
+      street: hit.address_parts.street || req.clean.parsed_text.street,
+      lat: hit.center_point.lat,
+      lon: hit.center_point.lon
+    };
+
+  }
+
+  getUrl(req) {
+    return url.resolve(this.baseUrl, 'search/geojson');
+  }
+
+}
+
+module.exports = Language;
diff --git a/test/unit/run.js b/test/unit/run.js
index fc14194f..6c987085 100644
--- a/test/unit/run.js
+++ b/test/unit/run.js
@@ -96,6 +96,7 @@ var tests = [
   require('./sanitizer/search'),
   require('./sanitizer/defer_to_addressit'),
   require('./sanitizer/wrap'),
+  require('./service/configurations/Interpolation'),
   require('./service/configurations/Language'),
   require('./service/configurations/PlaceHolder'),
   require('./service/configurations/PointInPolygon'),
diff --git a/test/unit/service/configurations/Interpolation.js b/test/unit/service/configurations/Interpolation.js
new file mode 100644
index 00000000..c71df69e
--- /dev/null
+++ b/test/unit/service/configurations/Interpolation.js
@@ -0,0 +1,140 @@
+module.exports.tests = {};
+
+const Interpolation = require('../../../../service/configurations/Interpolation');
+
+module.exports.tests.all = (test, common) => {
+  test('getName should return \'interpolation\'', t => {
+    const configBlob = {
+      url: 'http://localhost:1234',
+      timeout: 17,
+      retries: 19
+    };
+
+    const interpolation = new Interpolation(configBlob);
+
+    t.equals(interpolation.getName(), 'interpolation');
+    t.equals(interpolation.getBaseUrl(), 'http://localhost:1234/');
+    t.equals(interpolation.getTimeout(), 17);
+    t.equals(interpolation.getRetries(), 19);
+    t.end();
+
+  });
+
+  test('getUrl should return value passed to constructor', t => {
+    const configBlob = {
+      url: 'http://localhost:1234'
+    };
+
+    const interpolation = new Interpolation(configBlob);
+
+    t.equals(interpolation.getUrl(), 'http://localhost:1234/search/geojson');
+    t.end();
+
+  });
+
+  test('getHeaders should return empty object', t => {
+    const configBlob = {
+      url: 'base url'
+    };
+
+    const interpolation = new Interpolation(configBlob);
+
+    t.deepEquals(interpolation.getHeaders(), {});
+    t.end();
+
+  });
+
+  test('getParameters should return hit.address_parts.street over req.clean.parsed_text.street', t => {
+    const configBlob = {
+      url: 'base url'
+    };
+
+    const interpolation = new Interpolation(configBlob);
+
+    const req = {
+      clean: {
+        parsed_text: {
+          number: 'parsed number value',
+          street: 'parsed street value'
+        }
+      }
+    };
+
+    const hit = {
+      address_parts: {
+        street: 'hit street value'
+      },
+      center_point: {
+        lat: 12.121212,
+        lon: 21.212121
+      }
+    };
+
+    t.deepEquals(interpolation.getParameters(req, hit), {
+      number: 'parsed number value',
+      street: 'hit street value',
+      lat: 12.121212,
+      lon: 21.212121
+    });
+    t.end();
+
+  });
+
+  test('getParameters should return req.clean.parsed_text.street when hit.address_parts.street unavailable', t => {
+    const configBlob = {
+      url: 'base url'
+    };
+
+    const interpolation = new Interpolation(configBlob);
+
+    const req = {
+      clean: {
+        parsed_text: {
+          number: 'parsed number value',
+          street: 'parsed street value'
+        }
+      }
+    };
+
+    const hit = {
+      address_parts: {
+      },
+      center_point: {
+        lat: 12.121212,
+        lon: 21.212121
+      }
+    };
+
+    t.deepEquals(interpolation.getParameters(req, hit), {
+      number: 'parsed number value',
+      street: 'parsed street value',
+      lat: 12.121212,
+      lon: 21.212121
+    });
+    t.end();
+
+  });
+
+  test('baseUrl ending in / should not have double /\'s return by getUrl', t => {
+    const configBlob = {
+      url: 'http://localhost:1234/'
+    };
+
+    const interpolation = new Interpolation(configBlob);
+
+    t.deepEquals(interpolation.getUrl(), 'http://localhost:1234/search/geojson');
+    t.end();
+
+  });
+
+};
+
+module.exports.all = (tape, common) => {
+  function test(name, testFunction) {
+    return tape(`SERVICE CONFIGURATION /Interpolation ${name}`, testFunction);
+  }
+
+  for( var testCase in module.exports.tests ){
+    module.exports.tests[testCase](test, common);
+  }
+};