ZPL & PDF Conversion API Features

Pipeline Engine

24 programmable transformers to manipulate ZPL labels via API.

Content: Content manipulation (12): add_text, add_barcode, add_qrcode, add_datamatrix, add_box, add_line, replace_text, replace_barcode_value, remove_graphics, regex_replace, add_timestamp, format_date
Geometric: Geometric transformations (5): rotate, scale, add_margin, crop, mirror
Params: Print parameters (4): set_font, set_print_params, set_label_dimensions, repeat
Dynamic: Use {{variable_name}} for dynamic values resolved at runtime. Reusable templates with different data.

GS1-128 Compliance

Full GS1-128 compliance out of the box. Generate shipping labels accepted by Amazon, DHL, UPS, and all major retailers. Automatic barcode validation so you never ship a non-compliant label.

Z64 Compression

Labels print 2-3x faster. Our compression reduces label payload by up to 70%, reducing thermal printer memory usage and eliminating print lag during peak operations.

MCP Protocol

MCP Server

The first label platform with a Model Context Protocol (MCP) server. AI agents can now interact with your label infrastructure using natural language.

Transport

HTTP + SSE

Latency

2-12ms overhead

10 Exposed Tools

getAccountBalance, listJobs, getJob, cancelJob, estimateCost, listPipelines, getPipeline, getStorageUploadURL, submitConversion, startJob

Please generate a PDF preview of the shipping label for order #1234.

API

[Tool: submitConversion] Success. The preview PDF is available at your presigned URL.

Native CLI

Native CLI for your terminal

Single binary, zero dependencies. Install via Homebrew and manage conversions, pipelines, jobs, and your account, all without leaving the command line.

Single binary

Zero dependencies

13 commands

JSON / Text / Table

CLI Reference

brew install zplflow

zplflow convert label.pdf --to zpl

200 OK  |  < 200ms  |  1 token

zplflow jobs ls --status failed

0 results. Everything running smoothly.

zplflow pipelines run gs1-compliance

Pipeline executed. 24 transforms applied.

Everything you need for label operations

Pipeline Engine

MCP Server

Native CLI for your terminal

Start printing labels in minutes