diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -77,12 +77,18 @@ JSON output based on a schema written in JSON. See [EDI](https://github.com/jf-t
 - [Javonet/RDPCrystal](https://github.com/Javonet/RDPCrystal) - Java based EDI platform with example EDI solutions.
 - [adamkasztenny/edi-schemas](https://github.com/adamkasztenny/edi-schemas) - JSON schemas for X12 and EDIFACT.
 
+- [EDI Core](https://www.stedi.com/docs/edi-core) - Pay-per-use EDI to JSON translator service with Mapping Guide Validation. 
+    - [EDI Core Starter Pack](https://github.com/Stedi/api-starter-pack) - Github Starter-pack for EDI Core with Postman.
+
 ## Examples
 - [Edipique/EDI-X12](https://github.com/dipique/EDI-X12) - Rough process for generating EDI X12 834 and 837 files from a CSV file. Structured in a way that allows easy transition to other data sources.
 - [PHP Implementations of Transactions](https://github.com/stephenmccready/X12) - PHP examples of writing EDI from scratch.
 - [walkswithme/EDI-X12-ANSI-270](https://github.com/walkswithme/EDI-X12-ANSI-270) - PHP Library for creating EDI X12 ANSI 270 File 5010 Version
 - [EdiFabric/EDI-Translator-Demo](https://github.com/EdiFabric/EDI-Translator-Demo) - EDI Translator for EDIFACT D.96A, X12 004010 and HIPAA 5010
 
+## Public EDI References
+- [EDI Reference](https://edi.stedi.com/) - Free online viewer for all releases of X12 specifications
+- [EDI Mapping Guides](https://edi.stedi.com/mapping-guides) - Mapping Guides from Fortune 500 companies with free programmatic EDI validation to their guide.
 
 
 ## Syntax Highlighters
@@ -93,5 +99,7 @@ JSON output based on a schema written in JSON. See [EDI](https://github.com/jf-t
 - [Silvenga/vscode-edi-x12-support](https://github.com/Silvenga/vscode-edi-x12-support) - A Visual Studio Code extension aimed at providing basic support for the EDI format.
 - [vim-scripts/x12-syntax](https://github.com/vim-scripts/x12-syntax) - A simple syntax highlighter for EDI X12 files. Currently only Healthcare 270/271s are tested.
 
+## Free Online EDI editors
+- [EDI Inspector](https://edi.stedi.com/inspector) - A tool for breaking inspecting EDI files and getting a free JSON conversion
 ## Standalone editors
 - [RKDN/x12Tool](https://github.com/RKDN/x12Tool) - A tool for reading and modifying x12/EDI files.