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Exam Information
Official specifications published by Salesforce
Exam Format
120 min
60 scored + up to 5 non-scored
70%
Advanced
Registration
$200 USD
Kryterion Webassessor, Pearson VUE, or online proctoring
English, Japanese
Validity
2 years from pass date
Pass the MCD - Level 2 Maintenance exam (released seasonally, e.g., Winter '25); Retake the full certification exam
MULE-DEV-301 Exam Topics and Domains
MULE-DEV-301 is organized into 5 weighted domains. Expect to work with Maven, Anypoint Exchange, HTTP Connector, API Manager, and more.
1
Expose Production-Ready Anypoint Platform-Managed APIs from Mule Applications
13%
Implement Versioning of Specific API-Related Artifacts
API Version Management StrategiesManaging API Specification Versions in Exchange
- Implement versioning of API-related artifacts including RAML specs, API implementations, and policies
- Manage API version lifecycle through Exchange and API Manager
Configure Custom or Out-of-the-Box (OOTB) API Policies
Out-of-the-Box API PoliciesCustom API Policy Development
- Configure and apply out-of-the-box API policies in API Manager
- Build custom API policies when OOTB policies are insufficient
- Understand policy execution order and how policies interact
Implement Server-Side Caching of API Invocations Using API Policies
API Caching Policy Configuration
- Implement server-side caching of API invocations using policies to improve API performance
- Configure cache TTL and invalidation strategies
Implement HTTP Callbacks (Webhooks)
Webhook Implementation Patterns
- Implement HTTP callback (webhook) patterns in Mule applications
- Secure and validate webhook deliveries
Code API Implementations to Perform API Auto-Discovery
API Auto-Discovery Configuration
- Configure API auto-discovery to link Mule application flows with API Manager
- Enable policy enforcement through auto-discovery registration
2
Implement Maintainable and Modular Mule Applications and Their Maven Builds
25%
Modularize and Optimize Mule Application Maven Build Configurations
Maven POM Configuration for Mule ProjectsMulti-Module Maven Projects
- Modularize Maven build configurations for Mule applications
- Optimize build configurations using parent POMs, profiles, and dependency management
Implement Maven-Based Automated Deployment to Mule Runtimes
Mule Maven Plugin Deployment ConfigurationCI/CD Pipeline Integration
- Implement Maven-based automated deployment to CloudHub, CloudHub 2.0, Runtime Fabric, and on-premises runtimes
- Configure authentication for automated deployments
Execute MUnit Tests with Maven
MUnit Maven Plugin Configuration
- Configure and execute MUnit tests as part of Maven builds
- Set coverage thresholds and generate test reports
Build Custom API Policies
Custom Policy Architecture and Development
- Build custom API policies using the Mule policy SDK
- Package and publish custom policies to Anypoint Exchange
Encapsulate Common Mule Application Functionality in Libraries
Mule Plugin (Library) Development
- Create reusable Mule library-style plugins for common functionality
- Package and distribute plugins via Exchange or Maven repositories
Implement Custom Message Processors Using the Mule SDK or XML SDK
Mule Java SDK Custom Module DevelopmentXML SDK Custom Module Development
- Implement custom message processors using the Mule Java SDK
- Implement custom message processors using the XML SDK
- Choose the appropriate SDK based on requirements
3
Implement Monitorable Mule Applications
15%
Expose Health Check Endpoints from a Mule Application
Health Check Endpoint Design
- Design and implement health check endpoints that verify application and dependency status
- Integrate health checks with deployment platform monitoring
Implement Effective Logging
Logging Best Practices in Mule Applications
- Implement effective and performant logging in Mule applications
- Configure structured logging for production environments
Change Log Levels and Aggregate and Analyze Logs
Dynamic Log Level Management
- Dynamically change log levels at runtime
- Configure log aggregation and forwarding to external systems
Monitor Mule Applications and Mule Runtimes Using Anypoint Platform or External Tools
Anypoint Monitoring and Visualization
- Configure monitoring for Mule applications using Anypoint Platform tools
- Integrate with external monitoring solutions
Implement Message Correlation Including Persistence and Propagation of Correlation IDs over HTTP
Correlation ID Management
- Implement correlation ID propagation across distributed Mule applications
- Use correlation IDs for distributed tracing and log correlation
4
Implement Performant and Reliable Mule Applications
27%
Implement ObjectStore Persistence for All Mule Deployment Options
ObjectStore v2 Configuration and Usage
- Implement ObjectStore persistence that works across CloudHub, CloudHub 2.0, Runtime Fabric, and on-premises deployments
- Configure ObjectStore TTL, partitions, and persistence settings
Implement Fault-Tolerant, Performant, and Traceable Message Passing with VM and Anypoint MQ Connectors
VM Connector for Intra-Application MessagingAnypoint MQ for Inter-Application Messaging
- Implement reliable messaging using VM Connector for intra-application communication
- Implement Anypoint MQ for inter-application messaging with fault tolerance
Implement Fault-Tolerant Invocations of HTTP-Based APIs, Reacting Correctly to HTTP Status Codes
HTTP Error Handling and Retry Strategies
- Implement fault-tolerant HTTP invocations with appropriate retry strategies
- Handle different HTTP error types and status codes correctly
Validate Assertions Using the Validation Module
Validation Module Operations
- Use the Validation module to validate assertions in Mule flows
- Implement custom validation logic
Validate Messages Against XML- or JSON-Schema Documents
Schema Validation Implementation
- Validate incoming messages against JSON Schema and XML Schema documents
- Handle validation failures gracefully
Parallelize Integration Logic Using Scatter-Gather
Scatter-Gather Configuration and Usage
- Parallelize integration logic using scatter-gather to improve performance
- Configure scatter-gather concurrency settings
Implement Compensating Transactions for Partially Failed Scatter-Gather
Scatter-Gather Error Handling and Compensation
- Implement compensating transactions when scatter-gather routes partially fail
- Handle COMPOSITE_ROUTING errors and inspect individual failures
Implement Client-Side Caching of API Invocations for Performance
Client-Side Caching with Cache Scope
- Implement client-side caching using Cache scope to reduce redundant API calls
- Configure caching strategies with appropriate TTL and invalidation
5
Secure Data at Rest and in Transit
20%
Implement Secure, Environment-Dependent Properties Management
Secure Properties Configuration
- Implement secure properties management with encrypted values
- Configure environment-specific property files with secure placeholders
Create, Package, and Distribute Keys and Certificates
Keystore and Truststore Management
- Create keystores and truststores using supported formats
- Manage certificate lifecycle including creation, distribution, and renewal
Expose and Invoke APIs over HTTPS
HTTPS Configuration for HTTP Listener and Requester
- Configure HTTPS for both API exposure (listener) and API invocation (requester)
- Understand the role of keystores and truststores in HTTPS
Implement Transport Layer Security (TLS) Mutual Authentication on the Client and Server Side
Mutual TLS (mTLS) Implementation
- Implement mutual TLS authentication for both client and server applications
- Configure keystores and truststores correctly for mTLS
Implement API Invocations Authenticated by Basic Auth or OAuth2 with HTTP or REST Connectors
Authentication Schemes for HTTP Requests
- Configure HTTP requests with Basic Auth and OAuth 2.0 authentication
- Understand which authentication schemes are supported by the HTTP Connector
How do I earn this certification?
Passing MULE-DEV-301 earns the Salesforce Certified MuleSoft Developer II certification. It sits in the MuleSoft Developer track.
Next Level Options
- Mule-Arch-202 - Salesforce Certified MuleSoft Platform Integration ArchitectValidates skills to work with technical and non-technical stakeholders to translate functional and non-functional requirements into integration interfaces and implementations.
- Mule-Arch-201 - Salesforce Certified MuleSoft Platform ArchitectValidates skills to define and be responsible for an organization's Anypoint Platform strategy.
Alternative Paths
- Mule-Con-201 - Salesforce Certified MuleSoft Catalyst ConsultantComplements developer skills with delivery methodology expertise using MuleSoft Catalyst principles.
- Mule-Dev-202 - Salesforce Certified MuleSoft Hyperautomation DeveloperExtends developer skills into hyperautomation solutions across Salesforce and MuleSoft products.
Practice with Precision
The PlanetCert Simulator mirrors the real exam environment with authentic questions and timed pressure.
How to study for this exam?
The most effective way to prepare for MULE-DEV-301 is by using the PlanetCert Simulator to practice questions and review detailed explanations.
What's changed on this exam?
Current Status
ACTIVE
Updates
- CloudHub 2.0 Deployment configuration in Domain 2 covers CloudHub 2.0 as a deployment target alongside CloudHub 1.0
- Anypoint Runtime Fabric on Self-Managed Kubernetes Runtime Fabric deployment is one of the deployment targets covered in Domain 2 Maven deployment topics
- Flex Gateway May appear in future exam updates as API management evolves. Currently not a primary exam topic.
Who should take this exam?
Exam Code: Mule-Dev-201; Exam Name: Salesforce Certified MuleSoft Developer; Type: certification
- Completion of DEX660 - Anypoint Platform Development: Production-Ready Development Practices (3-day instructor-led course)
- Completion of DEX670 - Anypoint Platform Development: Production-Ready Integrations (4-day instructor-led course)
- Hands-on experience building production-ready Mule 4 applications
- Familiarity with Maven build automation and CI/CD pipelines
- Experience with API management using Anypoint Platform
- Understanding of DevOps practices