diff --git a/.gitignore b/.gitignore
index 1ff85f9..5794dd9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -68,3 +68,5 @@ typings/
 .sonarlint/
 
 .idea/
+
+swh.cache/
diff --git a/package.json b/package.json
index 97d58f4..2fbb540 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
-  "name": "template-typescript-package",
+  "name": "swh-swmath-save-now-batch",
   "version": "0.0.0-development",
-  "description": "A boilerplate repo for publishing typescript packages to npm",
+  "description": "A simple script to batch query the software heritage save now api with swMATH data",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "scripts": {
@@ -41,8 +41,10 @@
   "devDependencies": {
     "@commitlint/cli": "^8.2.0",
     "@commitlint/config-conventional": "^8.2.0",
+    "@types/cacache": "^12.0.1",
     "@types/jest": "^24.0.23",
     "@types/node": "^12.12.12",
+    "@types/node-fetch": "^2.5.4",
     "@typescript-eslint/eslint-plugin": "^2.9.0",
     "@typescript-eslint/parser": "^2.9.0",
     "eslint": "^6.7.1",
@@ -61,8 +63,10 @@
     "dist/**/*"
   ],
   "dependencies": {
-    "@types/node-fetch": "^2.5.4",
+    "cacache": "^13.0.1",
     "fast-csv": "^3.4.0",
-    "node-fetch": "^2.6.0"
+    "loglevel": "^1.6.6",
+    "node-fetch": "^2.6.0",
+    "p-queue": "^6.2.1"
   }
 }
diff --git a/src/__tests__/greet.test.ts b/src/__tests__/greet.test.ts
deleted file mode 100644
index 5fdb6bc..0000000
--- a/src/__tests__/greet.test.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-import { greet, swh } from '..'
-
-test('My Greeter', () => {
-  expect(greet('Carl')).toBe('Hello Carl')
-})
-
-test('Get swh list', async () => swh())
diff --git a/src/__tests__/index.test.ts b/src/__tests__/index.test.ts
new file mode 100644
index 0000000..43cede5
--- /dev/null
+++ b/src/__tests__/index.test.ts
@@ -0,0 +1,11 @@
+import { swh, deleteCacheEntry, processLink } from '..'
+import * as log from 'loglevel'
+
+log.setDefaultLevel('info')
+jest.setTimeout(300000) // Allow 5 min to process all links
+
+test('Process pseudo-link', async () => processLink(0, 'https://github.com/fairmath/SwhSaveNowBatch.git'))
+test('Process pseudo-link again', async () => processLink(0, 'https://github.com/fairmath/SwhSaveNowBatch.git'))
+test('Delete pseudo-link', async () => deleteCacheEntry(0))
+
+test('Get swh list again', async () => swh())
diff --git a/src/index.ts b/src/index.ts
index d73a90a..2833857 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,25 +1,49 @@
 import { Response } from 'node-fetch'
 import csv = require('fast-csv')
-import CsvParserStream from 'fast-csv/build/src/parser/CsvParserStream'
-
+import cacach = require('cacache')
 import fetch from 'node-fetch'
+import log = require('loglevel')
+import PQueue from 'p-queue'
+
+const cachePath = './swh.cache'
+
+export function processLink(id: number, url: string): Promise<boolean | string> {
+  log.trace('processing', { id: id, url: url })
+  const cacheKey = `${id}`
+  return cacach
+    .get(cachePath, cacheKey)
+    .then((x: any) => {
+      return x.data
+    })
+    .catch(() =>
+      fetch(`https://archive.softwareheritage.org/api/1/git/url/${url}/`).then((res: Response) =>
+        res.text().then((text) => cacach.put(cachePath, cacheKey, text)),
+      ),
+    )
+}
 
-function parseCSV(res: Response): Promise<CsvParserStream> {
+function parseCSV(res: Response): Promise<PQueue> {
   return new Promise((resolve) => {
-    const stream = res.body.pipe(csv.parse())
+    const stream = res.body.pipe(csv.parse({ delimiter: ';', ignoreEmpty: true }))
+    const queue = new PQueue({ concurrency: 10 })
+    let count = 0
+    queue.on('active', () => {
+      log.debug(`Working on item #${++count}.  Size: ${queue.size}  Pending: ${queue.pending}`)
+    })
     stream
       .on('error', /* istanbul ignore next */ (error: Error) => console.error(error))
-      .on('data', (row: string) => console.log(`ROW=${JSON.stringify(row)}`))
+      .on('data', (row: [number, string]) => queue.add(() => processLink(row[0], row[1])))
       .on('end', (rowCount: number) => {
-        console.log(`Parsed ${rowCount} rows`)
-        resolve(stream)
+        stream.end()
+        log.info(`Received ${rowCount} rows from swMATH`)
+        resolve(queue)
       })
   })
 }
 
-export const greet = (name: string) => `Hello ${name}`
-
 export const swh = () =>
   fetch('http://swmath.org/SWH/')
     .then(parseCSV)
-    .then((stream: CsvParserStream) => stream.end())
+    .then((q) => q.onIdle().then(() => log.info('Processing finished')))
+
+export const deleteCacheEntry = (id: number) => cacach.rm.entry(cachePath, `${id}`)