Salesforce Certified MuleSoft Integration Foundations – Complete Winter '26 Guide

API-Led Connectivity & Anypoint Platform

MuleSoft's API-led connectivity organizes integrations into three reusable layers: System APIs (connect directly to backend systems — SAP, Salesforce, databases), Process APIs (orchestrate business logic across multiple systems — order processing, customer onboarding), and Experience APIs (tailored for consuming clients — mobile app, web portal, partner). This layered approach promotes reusability — change a System API once and all Process APIs that use it automatically benefit. Anypoint Platform is the unified development and management environment: Anypoint Studio (IDE), Design Center (API design), Exchange (reuse hub), Runtime Manager (deployment), API Manager (governance). The exam tests which API layer handles a given integration scenario.

Mule 4 Flows & Core Concepts

A Mule 4 application consists of Flows triggered by a Source (HTTP listener, Salesforce trigger, scheduler) and processed by a sequence of Components (transformers, connectors, routers, error handlers). The Mule Event contains a Message (payload + attributes) and Variables. DataWeave 2.0 is the transformation language — `%dw 2.0` scripts transform data between formats (JSON, XML, CSV, Java). Connectors provide pre-built integration with systems: Salesforce Connector, HTTP Connector, Database Connector, Anypoint MQ. Error Handling: Try scope, On Error Continue, On Error Propagate define how errors are caught and handled. The exam tests basic flow design, DataWeave syntax, and error handling patterns.

DataWeave Transformations

DataWeave is MuleSoft's functional transformation language. Key syntax: `payload` accesses the incoming message body; `.` navigates object fields; `map` transforms arrays; `filter` selects elements; `pluck` converts objects to arrays; `reduce` aggregates; `if/else` handles conditionals. Type coercion converts between data types. Output directives specify the target format: `output application/json`, `output application/xml`. DataWeave modules provide utility functions (strings, dates, crypto). Mapping JSON to XML or flattening nested structures are common exam tasks. The Integration Foundations exam tests reading and writing basic DataWeave scripts for field mapping, conditional logic, and array transformation.

Connectors & Integration Patterns

Common MuleSoft connectors tested in Foundations: HTTP (REST API calls), Salesforce (CRUD, bulk, streaming), Database (SQL queries, stored procs), Anypoint MQ (async messaging), Scheduler (time-based triggers), File (read/write), SMTP (email). Integration patterns: Request-Reply (synchronous REST), Publish-Subscribe (Platform Events, Anypoint MQ topics), Batch Processing (large volume data loads), Polling (scheduled data sync). API-led connectivity promotes the Pub/Sub pattern for decoupling producers and consumers. The exam tests which connector and pattern to apply for a given scenario — synchronous vs. asynchronous, real-time vs. batch, point-to-point vs. hub-and-spoke.

Deployment & API Management Basics

MuleSoft applications deploy to Anypoint Runtime: CloudHub (Salesforce-managed cloud), Runtime Fabric (customer-managed Kubernetes), or On-Premises. CloudHub workers are the compute units — size by memory and vCores. Anypoint API Manager applies policies to APIs: rate limiting, OAuth 2.0 authentication, IP allowlisting, SLA tiers. API Autodiscovery links a deployed Mule app to an API Manager policy. Exchange hosts reusable assets: API specifications (RAML/OAS), connectors, templates, and examples. The Foundations exam tests the deployment options, how to apply an OAuth policy via API Manager, and how to publish a reusable asset to Anypoint Exchange.

Integration Styles & Patterns

Know the four integration styles: Point-to-Point, Hub-and-Spoke, ESB, and API-Led Connectivity. Understand the trade-offs of each and why API-led connectivity is MuleSoft's recommended approach.

Anypoint Platform Overview

Know the key platform components at a high level: Anypoint Studio, Exchange, Runtime Manager, API Manager, CloudHub, and MQ. Understand the role each plays in the integration lifecycle.

API Concepts

Understand what an API is, the difference between REST and SOAP APIs, how API contracts (RAML/OAS) define interface expectations, and how API versioning works.

DataWeave Basics

Know basic DataWeave syntax for simple JSON-to-JSON and JSON-to-XML transformations. Understand the %dw 2.0 header, output directive, and simple map/filter operations.

Connector Ecosystem

Know the Anypoint Exchange connector library concept: core connectors (HTTP, Database, File), premium connectors (Salesforce, SAP, Oracle), and how to search and install connectors in Studio.