Repositories list

• synapse

  Public
  Synapse is a set of lightweight foundational framework modules for rapid development, built-in with enterprise-grade maturity and quality.

  javareactiverest+ 6springnativerest-apifaaswebfluxcloud-functions

  Java

  •

  Apache License 2.0

  •19•36•5•18•Updated Jan 6, 2026Jan 6, 2026

• json-parse-context

  Public

  americanexpress/json-parse-context’s past year of commit activity
  ✨ Add the context of a json parse error to the error message with syntax highlighting if possible.

  JavaScript

  •

  Apache License 2.0

  •3•6•0•4•Updated Jan 5, 2026Jan 5, 2026

• parrot-jest-image-snapshot-example

  Public

  americanexpress/parrot-jest-image-snapshot-example’s past year of commit activity
  ✨ Example demonstrating usage of parrot for more deterministic jest-image-snapshot tests

  testingparrotjest-image-snapshot+ 1one-app

  JavaScript

  •

  Apache License 2.0

  •4•9•0•1•Updated Jan 1, 2026Jan 1, 2026

• jest-json-schema

  Public

  americanexpress/jest-json-schema’s past year of commit activity
  ✨ JSON schema matcher for Jest

  testingjsonjest+ 3json-schemamatchersone-app

  JavaScript

  •

  Apache License 2.0

  •14•171•2•1•Updated Dec 31, 2025Dec 31, 2025

• jakapu

  Public
  Config driven SDK to publish events into any Kafka topic without writing code

  javakafkarest+ 1spring

  Java

  •

  Apache License 2.0

  •7•3•0•3•Updated Dec 19, 2025Dec 19, 2025

• earlybird

  Public

  americanexpress/earlybird’s past year of commit activity
  EarlyBird is a sensitive data detection tool capable of scanning source code repositories for clear text password violations, PII, outdated cryptography methods, key files and more.

  Go

  •

  Apache License 2.0

  •85•751•10•11•Updated Dec 15, 2025Dec 15, 2025

• create-using-template

  Public
  JavaScript

  •

  Apache License 2.0

  •5•5•0•0•Updated Dec 9, 2025Dec 9, 2025

• one-service-worker

  Public
  ✨ Minimal, light-weight, Promise based library that unifies the service worker and browser threads under one API

  service-workerone-app

  JavaScript

  •

  Apache License 2.0

  •4•27•5•2•Updated Dec 4, 2025Dec 4, 2025

• fetchye

  Public

  americanexpress/fetchye’s past year of commit activity
  ✨ If you know how to use Fetch, you know how to use Fetchye [fetch-yae]. Simple React Hooks, Centralized Cache, Infinitely Extensible.

  reactreduxfetch+ 9queryasyncssrcachepromisereact-reduxdata-fetching+ 2

  JavaScript

  •

  Apache License 2.0

  •25•45•7•2•Updated Dec 4, 2025Dec 4, 2025

• amex-jest-preset

  Public
  ✨ An opinionated Jest preset

  testingjestone-app+ 1jest-configuration

  JavaScript

  •

  Apache License 2.0

  •4•14•0•0•Updated Nov 26, 2025Nov 26, 2025

• amex-jest-preset-react

  Public

  americanexpress/amex-jest-preset-react’s past year of commit activity
  ✨ An opinionated Jest preset for React modules

  reacttestingjest+ 1one-app

  JavaScript

  •

  Apache License 2.0

  •5•14•0•0•Updated Nov 26, 2025Nov 26, 2025

• babel-preset-amex

  Public

  americanexpress/babel-preset-amex’s past year of commit activity
  ✨ Standard babel preset for American Express

  babelbuildbabel-preset+ 3presettranspileone-app

  JavaScript

  •

  Apache License 2.0

  •10•17•1•0•Updated Nov 26, 2025Nov 26, 2025

• css-to-js

  Public
  ✨ Tool for transforming CSS into JS

  cssjsone-app+ 2converts-csscss2js

  JavaScript

  •

  Apache License 2.0

  •2•32•1•1•Updated Nov 16, 2025Nov 16, 2025

• unify-simple-decision-table

  Public
  Java

  •

  Apache License 2.0

  •0•4•0•0•Updated Nov 4, 2025Nov 4, 2025

• jest-image-snapshot

  Public
  ✨ Jest matcher for image comparisons. Most commonly used for visual regression testing.

  testingjestsnapshot+ 5jest-snapshotsvisual-comparison-testingone-appimage-snapshotsimage-comparisons

  JavaScript

  •

  Apache License 2.0

  •203•3.9k•32•2•Updated Oct 21, 2025Oct 21, 2025

• unify-jdocs

  Public
  A new way of working with JSON documents without using model classes or JSON schemas

  javajson

  Java

  •

  Apache License 2.0

  •14•82•0•1•Updated Oct 1, 2025Oct 1, 2025

• unify-flowret

  Public

  americanexpress/unify-flowret’s past year of commit activity
  A lightweight Java based orchestration engine

  javaworkflowworkflow-engine+ 3bpmworkflow-managementworkflow-automation

  Java

  •

  Apache License 2.0

  •29•121•0•0•Updated Sep 16, 2025Sep 16, 2025

• connectchain

  Public
  Python

  •

  Apache License 2.0

  •6•12•0•0•Updated Aug 29, 2025Aug 29, 2025

• parrot

  Public archive
  ✨ Scenario-based HTTP mocking

  mockhttpdevtools+ 5mockingscenarioshttp-mockingparrotone-app

  JavaScript

  •

  Apache License 2.0

  •30•140•12•3•Updated May 29, 2025May 29, 2025

• vitruvius

  Public

  americanexpress/vitruvius’s past year of commit activity
  ✨Vitruvius extends redux's combineReducers to allow developers to include a buildInitialState method on their reducer

  reactstate-managementreducer+ 1one-app

  JavaScript

  •

  Apache License 2.0

  •4•11•0•1•Updated May 16, 2025May 16, 2025

• eslint-config-amex

  Public

  americanexpress/eslint-config-amex’s past year of commit activity
  ✨ This is American Express' eslint config

  eslintlintingstyle-guide+ 1one-app

  JavaScript

  •

  Apache License 2.0

  •18•43•1•1•Updated May 16, 2025May 16, 2025

• create-shared-react-context

  Public
  ✨A memoized wrapper around React.createContext. Used by One App as a dependency to pass React context between Holocron modules without external usage.

  reactcreatecontext

  TypeScript

  •

  Apache License 2.0

  •3•9•0•1•Updated Jan 29, 2025Jan 29, 2025

• task-status-pr-checker

  Public
  This is triggered when a pull request is created. If the pull request has pending tasks. The pull request won't be merged and the status is updated on the pull request checks.

  taskactionspull-request-review

  JavaScript

  •

  Apache License 2.0

  •1•10•0•7•Updated Nov 20, 2024Nov 20, 2024

• react-albus

  Public

  americanexpress/react-albus’s past year of commit activity
  ✨ React component library for building declarative multi-step flows.

  reactwizardmulti-step+ 1one-app

  JavaScript

  •

  Apache License 2.0

  •90•1.1k•13•3•Updated Oct 29, 2024Oct 29, 2024

• simplemli

  Public
  Encode and Decode Message Length Indicators for TCP/IP socket based protocols

  golangiso8583

  Go

  •

  Apache License 2.0

  •6•30•0•0•Updated Sep 2, 2024Sep 2, 2024

• redux-lifesaver

  Public
  ✨ redux-lifesaver is a middleware that keeps track of how many times actions of the same type are dispatched within a given period.

  reactmiddlewarelimiter+ 3throttlingone-appredux-lifesaver

  JavaScript

  •

  Apache License 2.0

  •5•22•0•1•Updated Jun 18, 2024Jun 18, 2024

• redux-idle-callback

  Public
  ✨ Redux middleware to dispatch actions during a Redux store's idle periods

  reactreact-reduxidle+ 1one-app

  JavaScript

  •

  Apache License 2.0

  •2•16•0•1•Updated Jun 18, 2024Jun 18, 2024

• lumberjack

  Public
  ✨ Lumberjack is a minimal, configurable Console with utilities.

  streamlogginglumberjack+ 2one-appnodejs-console

  JavaScript

  •

  Apache License 2.0

  •5•16•0•2•Updated Jun 16, 2024Jun 16, 2024

• react-seo

  Public
  ✨ Simple SEO tag manager for React

  metaseoone-app

  JavaScript

  •

  Apache License 2.0

  •9•49•2•7•Updated Jun 12, 2024Jun 12, 2024

• purgecss-loader

  Public archive

  americanexpress/purgecss-loader’s past year of commit activity
  ✨ A Webpack loader to strip unused selectors from your CSS

  cssoptimizationcss-modules+ 4webpack-loaderone-apppurgecssstrip-unused-selectors

  JavaScript

  •

  Apache License 2.0

  •4•22•0•0•Updated May 29, 2024May 29, 2024