Completely
Headless WMS
for the AI Age

Build your own UIs and workflows. Our highly available APIs handle the warehouse work and scale with the throughput you need.

Access the WMS code and push updates to your environment.

Book a call See how it works

Claude Code

OpenAI

Your WMSLabels43 · Headless APIs

UPS

SAP

★★★★★

Labels43 has helped us improve the checkout experience by giving customers clearer and more accurate shipping options before they complete their purchase. The app is easy to use day to day, and the checkout configuration gives us more control over how delivery options are presented. Tomas was very responsive during setup and helped make sure everything was configured correctly for our store.

Andrew Haner

Chief Operating Officer, MJ Arsenal

Read case study

★★★★★

Shoppers see a specific shipping method and delivery date at checkout. At the pack station, Fetch prints the matching label, so customers get what they expected. Brands can get set up themselves, with very little extra work for the warehouse.

Nish George

CEO, Fetch Fulfillment

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★★★★★

Labels43 has been a great fit for our dropship workflow. We needed a reliable way for our team to quickly and accurately estimate shipping costs across a variety of orders, and this app delivers exactly that. It gives us the flexibility to support our specific shipping rules while keeping the process simple for our team. Overall, it’s helped us quote customers with more confidence and streamline our internal operations.

Danish Iqbal

Founder and CEO, Medusa Distribution

Read case study

★★★★★

Labels43 has been very helpful for managing more detailed shipping requirements. We especially appreciate the flexibility around custom packing logic, destination exclusions, and international shipping configuration. It is powerful without feeling overly complicated, and the support has been excellent. Tomas has been hands on and practical whenever we needed help fine tuning the setup.

Justin Cohen

Chief Design Officer, BigFun!

Read case study

★★★★★

Easy setup and it’s saving a lot of headache especially around holiday season and to prevent questions around ship by dates (ex. Mother’s Day, Xmas, etc.). When we did have questions Tomas answered them swiftly and we’ve had no problem getting the app up and running through different theme updates. I hope the flat fee business model stays bc that was a major pull to keep our costs predictable & we def wanna keep using!!

Rhaime Kim

Founder, Nueue Ave

Read case study

★★★★★

We have been using Labels43 for a while now and it has been a huge help with providing accurate shipping promises and ETAs to our customers. The founder, Tomas, has also been extremely quick to respond whenever we have any questions about the app. We have seen a big decrease in the amount of customer service emails regarding shipping times because the customer expectations are more accurate now. Highly recommend!

Evan Hoff

Chief Brand Officer, Cartisan

Read case study

★★★★★

Labels43 has helped us improve the checkout experience by giving customers clearer and more accurate shipping options before they complete their purchase. The app is easy to use day to day, and the checkout configuration gives us more control over how delivery options are presented. Tomas was very responsive during setup and helped make sure everything was configured correctly for our store.

Andrew Haner

Chief Operating Officer, MJ Arsenal

Read case study

★★★★★

Nish George

CEO, Fetch Fulfillment

Read case study

★★★★★

Labels43 has been a great fit for our dropship workflow. We needed a reliable way for our team to quickly and accurately estimate shipping costs across a variety of orders, and this app delivers exactly that. It gives us the flexibility to support our specific shipping rules while keeping the process simple for our team. Overall, it’s helped us quote customers with more confidence and streamline our internal operations.

Danish Iqbal

Founder and CEO, Medusa Distribution

Read case study

★★★★★

Labels43 has been very helpful for managing more detailed shipping requirements. We especially appreciate the flexibility around custom packing logic, destination exclusions, and international shipping configuration. It is powerful without feeling overly complicated, and the support has been excellent. Tomas has been hands on and practical whenever we needed help fine tuning the setup.

Justin Cohen

Chief Design Officer, BigFun!

Read case study

★★★★★

Easy setup and it’s saving a lot of headache especially around holiday season and to prevent questions around ship by dates (ex. Mother’s Day, Xmas, etc.). When we did have questions Tomas answered them swiftly and we’ve had no problem getting the app up and running through different theme updates. I hope the flat fee business model stays bc that was a major pull to keep our costs predictable & we def wanna keep using!!

Rhaime Kim

Founder, Nueue Ave

Read case study

★★★★★

We have been using Labels43 for a while now and it has been a huge help with providing accurate shipping promises and ETAs to our customers. The founder, Tomas, has also been extremely quick to respond whenever we have any questions about the app. We have seen a big decrease in the amount of customer service emails regarding shipping times because the customer expectations are more accurate now. Highly recommend!

Evan Hoff

Chief Brand Officer, Cartisan

Read case study

All case studies ↗

Receive

Know what arrived and where it belongs.

Put away

Give every unit a place to call home.

Replenish

Keep pick locations ready for the next order.

Pick

Your picking process, connected to your inventory.

Pack

Use our optimizations or plug in your own.

Ship

Rate, label, and get it out the door.

Start with Labels43

Claude Code + CodexYour team builds. Your fork runs.

code, docs & configuration

Your dashboards, analyses & tools

▥ Dashboards⌕ Analyses⌘ New tooling

documented APIs

Labels43 headless WMSYour database · inventory · warehouse work

orders, rates & tracking

Shopping channelsOrders ↕ inventory & tracking

CarriersYour carrier accounts & rates

events ↓ messages & labels

Messages, print jobs, done.Gmail · Slack · iMessage · Telegram · printers

Keep your WMS

Claude Code + CodexYour team builds. Your fork runs.

code, docs & configuration

Your dashboards, analyses & tools

▥ Dashboards⌕ Analyses⌘ New tooling

documented APIs

Labels43 headless interfaceAPIs · custom workflows · data sync

WMS API wrapper ↕ data sync

Your existing WMS / ERPInventory, operations & existing connections stay here.

orders, rates & tracking

Shopping channelsOrders ↕ inventory & tracking

CarriersYour carrier accounts & rates

events ↓ messages & labels

Messages, print jobs, done.Gmail · Slack · iMessage · Telegram · printers

Give your AI agents access to our APIs and CLI workflows, your source code, database schema, and data. We host your own fork of our open-source WMS, with full SQL access and visibility into every deployment.

Add fields, write migrations, create database indices, or build your own reports. Your agent edits the code and submits a PR. Changes are tested, reviewed, merged into your fork, and automatically deployed to your environment.

Build the tools your warehouse needs, even when our team doesn’t have the bandwidth to build them for you.

Agent workspaceInteractive example

Show me what is packed in LPN-1.

I’ll read the container through your WMS API and show the response.

curl "$WMS_API/v1/containers/LPN-1/contents?packer_id=packer-42" \
  -H "X-Client-Id: $CLIENT_ID" \
  -H "Authorization: Bearer $WMS_TOKEN"

Container response · selected fields

{
  "lpn": "LPN-1",
  "facility": "MAIN",
  "container_status": "PACKED",
  "pick_details": [
    { "sku": "SKU-1", "quantity_picked": 1,
      "quantity_remaining": 0 }
  ]
}

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