What is EDI?
The 10-minute version: what your partner is actually asking for, and what 'compliant' means.
Resources
Learn EDI in plain language
Guides written for operators, not standards committees — the same explanations Signal uses inside the product.
Signal workspace
Validated, routed, acknowledged.
Partner rules checked
Human decisions drafted
Receipts attached
Start here
X12 vs EDIFACT
Which standard your partners use, why both exist, and when you'll meet each.
The EDI 850 explained
A purchase order, segment by segment, with a real annotated example.
For the mandate on your desk
EDI requirements by retailer
What Whole Foods, Target, Kroger, and Amazon each actually require — kept current.
Surviving retailer chargebacks
The compliance-program mechanics behind penalties, and the windows that matter.
EDI error codes (AK905 and friends)
What rejections mean in English and how each one gets fixed.
For developers
API reference
Documents, partners, validation, webhooks — with runnable examples.
Public playground
Validate an X12 document in the browser, no account needed.
MCP server docs
Give your own agents EDI tools — demo mode included.
Can't find your question?
The chat on every page answers EDI questions free — customer or not.