diff --git a/api/.gitignore b/api/.gitignore
index d9688e343..3c5f04f59 100644
--- a/api/.gitignore
+++ b/api/.gitignore
@@ -170,7 +170,6 @@ logs*.txt
 *.csv
 
 *.p
-*.js
 SUBNETS.json
 
 ./chalicelib/.configs
diff --git a/api/sourcemaps_reader/handler.js b/api/sourcemaps_reader/handler.js
new file mode 100644
index 000000000..61c530235
--- /dev/null
+++ b/api/sourcemaps_reader/handler.js
@@ -0,0 +1,110 @@
+'use strict';
+const sourceMap = require('source-map');
+const AWS = require('aws-sdk');
+const sourceMapVersion = require('./package.json').dependencies["source-map"];
+const URL = require('url');
+const getVersion = version => version.replace(/[\^\$\=\~]/, "");
+
+module.exports.sourcemapReader = async event => {
+    sourceMap.SourceMapConsumer.initialize({
+        "lib/mappings.wasm": `https://unpkg.com/source-map@${getVersion(sourceMapVersion)}/lib/mappings.wasm`
+    });
+    if (process.env.S3_HOST) {
+        const s3 = new AWS.S3({
+            endpoint: process.env.S3_HOST,
+            accessKeyId: process.env.S3_KEY,
+            secretAccessKey: process.env.S3_SECRET,
+            s3ForcePathStyle: true, // needed with minio?
+            signatureVersion: 'v4'
+        });
+    } else {
+        const s3 = new AWS.S3({
+            'AccessKeyID': process.env.aws_access_key_id,
+            'SecretAccessKey': process.env.aws_secret_access_key,
+            'Region': process.env.aws_region
+        });
+    }
+
+    var options = {
+        Bucket: event.bucket,
+        Key: event.key
+    };
+    return new Promise(function (resolve, reject) {
+        s3.getObject(options, (err, data) => {
+            if (err) {
+                console.log("Get S3 object failed");
+                console.log(err);
+                return reject(err);
+            }
+            const sourcemap = data.Body.toString();
+
+            return new sourceMap.SourceMapConsumer(sourcemap)
+                .then(consumer => {
+                    let results = [];
+                    for (let i = 0; i < event.positions.length; i++) {
+                        let original = consumer.originalPositionFor({
+                            line: event.positions[i].line,
+                            column: event.positions[i].column
+                        });
+                        let url = URL.parse("");
+                        let preview = [];
+                        if (original.source) {
+                            preview = consumer.sourceContentFor(original.source, true);
+                            if (preview !== null) {
+                                preview = preview.split("\n")
+                                    .map((line, i) => [i + 1, line]);
+                                if (event.padding) {
+                                    let start = original.line < event.padding ? 0 : original.line - event.padding;
+                                    preview = preview.slice(start, original.line + event.padding);
+                                }
+                            } else {
+                                console.log("source not found, null preview for:");
+                                console.log(original.source);
+                                preview = []
+                            }
+                            url = URL.parse(original.source);
+                        } else {
+                            console.log("couldn't find original position of:");
+                            console.log({
+                                line: event.positions[i].line,
+                                column: event.positions[i].column
+                            });
+                        }
+                        let result = {
+                            "absPath": url.href,
+                            "filename": url.pathname,
+                            "lineNo": original.line,
+                            "colNo": original.column,
+                            "function": original.name,
+                            "context": preview
+                        };
+                        // console.log(result);
+                        results.push(result);
+                    }
+
+                    // Use this code if you don't use the http event with the LAMBDA-PROXY integration
+                    return resolve(results);
+                });
+        });
+    });
+};
+
+
+// let v = {
+//     'key': '1725/99f96f044fa7e941dbb15d7d68b20549',
+//     'positions': [{'line': 1, 'column': 943}],
+//     'padding': 5,
+//     'bucket': 'asayer-sourcemaps'
+// };
+// let v = {
+//     'key': '1/65d8d3866bb8c92f3db612cb330f270c',
+//     'positions': [{'line': 1, 'column': 0}],
+//     'padding': 5,
+//     'bucket': 'asayer-sourcemaps-staging'
+// };
+// module.exports.sourcemapReader(v).then((r) => {
+//     // console.log(r);
+//     const fs = require('fs');
+//     let data = JSON.stringify(r);
+//     fs.writeFileSync('results.json', data);
+// });
\ No newline at end of file
diff --git a/api/sourcemaps_reader/server.js b/api/sourcemaps_reader/server.js
new file mode 100644
index 000000000..9ff9c4007
--- /dev/null
+++ b/api/sourcemaps_reader/server.js
@@ -0,0 +1,38 @@
+const http = require('http');
+const handler = require('./handler');
+const hostname = '127.0.0.1';
+const port = 3000;
+
+const server = http.createServer((req, res) => {
+    if (req.method === 'POST') {
+        let data = '';
+        req.on('data', chunk => {
+            data += chunk;
+        });
+        req.on('end', function () {
+            data = JSON.parse(data);
+            console.log("Starting parser for: " + data.key);
+            process.env = {...process.env, ...data.bucket_config};
+            handler.sourcemapReader(data)
+                .then((results) => {
+                    res.statusCode = 200;
+                    res.setHeader('Content-Type', 'application/json');
+                    res.end(JSON.stringify(results));
+                })
+                .catch((e) => {
+                    console.error("Something went wrong");
+                    console.error(e);
+                    res.statusCode(500);
+                    res.end(e);
+                });
+        })
+    } else {
+        res.statusCode = 405;
+        res.setHeader('Content-Type', 'text/plain');
+        res.end('Method Not Allowed');
+    }
+});
+
+server.listen(port, hostname, () => {
+    console.log(`Server running at http://${hostname}:${port}/`);
+});
\ No newline at end of file