zplflow

official

MCP server to convert, transform, and validate industrial ZPL/PDF shipping labels via AI agents.

View on zplflow.io

What can you do with Zplflow MCP?

  • Convert PDF to ZPL — Ask your assistant to turn a PDF label into Zebra ZPL commands, optionally specifying DPI.
  • Convert ZPL to PDF — Ask your assistant to convert ZPL label data back into a PDF document.
  • Apply label transformations — Ask your assistant to inject GS1-128 compliance, add 2D QR codes, or adjust rotation and scaling on a label.
  • Validate labels — Ask your assistant to inspect and validate label content before it reaches the printer.
  • Batch label processing — Ask your assistant to run high-volume async label conversions for large print runs.

Hosted MCP Server

npx add-mcp 'https://mcp.zplflow.io'

Installs into Claude Code, Codex, Cursor and more

Documentation

Your label infrastructure.One API. Zero IT projects.

Non-invasive programmable thermal label middleware. Convert, transform, and intercept print streams downstream without touching legacy ERP, WMS, or AS400 code. Devs integrate once. Business controls the flow.

ZplFlow.io

The ZPL and PDF Label Conversion Problem

Every production line runs on labels. Every label starts as data, a PDF, a shipping manifest, an order. But somewhere between that data and the thermal printer, the process breaks. And every fix becomes an IT project lasting days or weeks.

Expensive desktop software

On-premise software costs thousands of euros per year in licenses alone.

Fragile custom scripts

Internal libraries and scripts are difficult to maintain, don't scale, and break on special characters.

Format and compliance chaos

Every carrier sends a different ZPL variant. Your biggest client demands a GS1-128 barcode and a QR code for traceability. Your current software can't do it. One wrong character and an entire shipment is rejected.

How ZplFlow solves ZPL-PDF label conversion

01

Create an account

Sign up in 30 seconds. No credit card required.

02

Get your API key

One click in the dashboard. Your key is ready.

03

Convert your first label

Send a PDF, get ZPL. Or the other way around. Under 200ms.

What is ZplFlow?

Enterprise label conversion infrastructure purpose-built for high-throughput WMS, ERP, and TMS operations.

Universal Label Bridge: PDF ↔ ZPL

Bidirectional Conversion

Instant conversion between ERP/WMS PDF streams and Zebra ZPL commands. Eliminates printer driver headaches, proprietary middleware, and desktop utilities.

REST API · CLI · Sync & Async

24 In-Memory DOM Transformers

Programmable Pipelines

Inject GS1-128 compliance, 2D QR codes, rotation, scaling, and carrier adjustments on the fly without touching your core ERP code.

GS1-128 · Barcodes · Normalization

Agentic Print Automation

AI-Native & MCP Server

First label platform with a native Model Context Protocol (MCP) server. Allows AI agents like Claude and GPT to inspect, transform, and validate labels via natural language.

MCP Protocol · AI Workflows

⚡ < 200ms Sync Latency

📦 10,000+ Labels/Hr Async Batch

🔒 AES-256 Encryption & Stateless

🇪🇺 EU-Hosted & GDPR Compliant

3 Lines of Code: Your First PDF to ZPL Conversion

REST API or native CLI. 3 lines or 1 command. That's it.

curl -X POST "https://api.zplflow.io/v1/convert/pdf-to-zpl?dpi=203" \
  -H "Authorization: Bearer lb_YOUR_API_KEY" \
  -H "Content-Type: application/pdf" \
  --data-binary @label.pdf

Three Reasons Teams Switch to ZplFlow for ZPL PDF Conversion

One API. Every format.

I have PDFs from carriers but the printer wants ZPL. Or vice versa. I have to manage two systems.

Bidirectional PDF ↔ ZPL conversion in a single API.

One integration. Zero separate systems.

The line never stops.

The line stops if I get a label wrong. Or if volumes exceed forecast.

Dynamic over-budget keeps printing even when volumes spike. Every operation is verified, no label is ever lost or double-charged.

The line never stops. Even during peaks.

Enterprise features. Zero infrastructure.

On-premise software costs thousands of euros per year. And I have to maintain the servers.

Cloud-native, stateless, pay-per-use. No installation, no fixed licenses.

Pay only for what you use. Predictable costs. From €0 the first month.

Why we built this

Built by a team that's been on the line

Every warehouse runs on labels. Every label starts as data, a PDF, a shipping manifest, an order. But somewhere between that data and the thermal printer, the process breaks.

We built ZplFlow because the world doesn't need another label editor. It needs label infrastructure, an API that turns PDFs into ZPL, ZPL into PDFs, and both into pipelines that transform, validate, and optimize every label that touches a box.

Cloud-native. Stateless. AI-ready. Five minutes to first label. That's ZplFlow.

We didn't start from a pitch deck. We started from years of customer requests, the same label modifications asked over and over, by different teams, in different warehouses. 20 years building software, 10 of them in logistics IT, taught us the problem was never the printer or the label. It was the lack of infrastructure. ZplFlow is bootstrapped, we built it to solve the problem, not to raise money for it.

The ZplFlow team

20 years building software · 10 in logistics IT

Built in the open

No marketing claims. Verified in the repo.

Every statement below maps to a real file in our codebase. If it's not documented, we don't say it.

PDF engine PDFium, the same engine Chrome uses for PDFs Tech Stack

Pipelines 24 programmable ZPL-to-ZPL transformers Pipeline Specification

Encryption at rest AES-256 Encryption Strategy

Data storage Stateless, no PDF/ZPL payloads in the database Data model

Audit retention 365 days (retention configured) plan configuration

Infrastructure EU data residency Architecture

Sync latency < 200ms (load-tested, 1 CPU) Loadtest Results