Updated for Summer '26
New to this track? Our Salesforce Certified MuleSoft Integration Foundations exam prep is the recommended first step. See our certification path to understand where this certification fits. The Salesforce Certified MuleSoft Developer exam weights Mule Applications most heavily (30%) — see the full breakdown, study tips, and practice questions below. See our full study guide for deep section coverage. Ready to book? Read our exam tips and study plan.
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Updated for Summer '26
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Who is the MuleSoft Developer I exam for?
- Integration developers: You build Mule applications in Anypoint Studio and want to validate your foundational MuleSoft development skills.
- Java and backend developers: You’re transitioning into integration development and want a credential that proves your Mule 4 and DataWeave proficiency.
- Salesforce developers: You work on the Salesforce platform and want to add MuleSoft integration skills to connect enterprise systems through Anypoint.
Exam Fees & Registration
Exam Fee
$200
One-time registration fee
Retake Fee
$100
If you need to retake the exam
Comparing certs? View all Salesforce exam fees in one place →
Certification Validity
Your Salesforce Certified MuleSoft Developer certification is valid for 3 years from the date you pass the exam. You'll need to maintain your certification through continuing education or retake the exam.
How to Register
Register for the Salesforce Certified MuleSoft Developer exam through the official Salesforce certification portal.
Register for ExamExam data verification: questions, duration, passing score, fees, and section coverage were checked against official source references on .
Official sources: Exam guide·Salesforce exam pricing·Independent prep resource; no braindumps or leaked exam questions.
Salesforce Certified MuleSoft Developer – Complete Summer '26 Guide
The entry-level MuleSoft developer exam. You'll need to build Mule flows in Anypoint Studio, write DataWeave transformations, design APIs with RAML, handle errors, and deploy to CloudHub.
Recommended Prerequisites
We recommend completing this certification first to prepare you better.
Salesforce Certified MuleSoft Developer Exam Weightage by Section
Exam Topics
Exam Tips
- 1Mule Applications and DataWeave are 55%—build flows and transform data.
- 2Know Anypoint Platform: design center, runtime, and deployment.
- 3Understand connectors, error handling, and logging.
- 4Practice building a simple API and a flow that calls an external system.
Prerequisites
- •Programming experience
- •Basic integration concepts
Focus Areas
- •Anypoint Platform
- •Mule Applications
- •DataWeave and APIs
- •Testing and Deployment
Study Strategy
Use Anypoint Platform.
Build at least one API and one integration.
Practice DataWeave transformations.
Align with the official exam guide.
Exam Format and First-Attempt Readiness
The Salesforce Certified MuleSoft Developer exam has 60 questions in 120 min, passing score 70%. Most Salesforce exams test scenario-based decisions — focus on when to use each feature, not just terms.
- Study Mule Applications and Anypoint Platform first — together they carry 55% of the exam.
- Do timed question sets. Build pacing and confidence.
- Review why wrong answers are wrong. It improves scenario reasoning.
- Book the exam once your mock scores are steady above 70%.
Is the MuleSoft Developer I Exam Hard?
Is the MuleSoft Developer I Exam Hard?
MuleSoft Developer I is moderately challenging. The exam requires hands-on familiarity with Anypoint Studio, DataWeave 2.0 syntax, and Mule flow design — textbook knowledge alone won’t be enough to pass.
- 60 multiple-choice questions in 120 minutes.
- ~70% passing score — roughly 42 correct answers needed to pass.
- DataWeave syntax — reading and writing transformation scripts is the biggest hurdle for candidates without hands-on practice.
- Hands-on building required — candidates who have built and deployed at least 3–5 Mule applications in Anypoint Studio perform significantly better.
Pass Rate Guidance
Build several Mule apps end-to-end in Anypoint Studio before booking. Score 80%+ on practice exams to leave a buffer for DataWeave questions.
MuleSoft Developer I Exam Format Explained
MuleSoft Developer I Exam Format Explained
The exam is proctored online or in-person. Here is the format:
Total Questions
60 scored questions
Time Limit
120 min
Passing Score
70%
Question Type
Multiple-choice & multiple-select
How Many Questions Are Scenario-Based?
About 40–50% of questions present a scenario requiring you to choose the correct Mule component, DataWeave function, or error handling approach. Common patterns include selecting the right connector for a use case, writing DataWeave expressions, and choosing between On Error Continue and On Error Propagate.
Best Way to Pass on Your First Attempt
- Master DataWeave 2.0: Practice map, filter, reduce, and pluck functions until you can read and write scripts fluently.
- Build flows in Anypoint Studio: Create HTTP-triggered flows with database and Salesforce connectors, error handling, and deployment to CloudHub.
- Know your connectors: Understand HTTP Listener vs Request, Database operations, and how to configure the Salesforce connector for CRUD.
- Understand error handling: Know when to use On Error Continue vs On Error Propagate and how the error type hierarchy works.
MuleSoft Developer I: Key Concepts for the Exam
Anypoint Platform and Development Lifecycle
Anypoint Platform is MuleSoft's integration platform — Design, Develop, Deploy, Manage. Anypoint Studio is the Eclipse-based IDE for Mule application development. Anypoint Exchange is the asset repository for APIs, connectors, templates, and examples. CloudHub is the iPaaS (integration Platform as a Service) for deploying Mule apps. The developer lifecycle: design the API spec in API Designer → publish to Exchange → implement in Studio → deploy to CloudHub → manage in Runtime Manager.
Mule Events, Flows, and Core Concepts
A Mule Event carries the message through the flow: Payload (the message data), Attributes (metadata about the source, like HTTP headers), Variables (flow-level storage), Error (in error handling context). A Flow has a Source (event trigger — HTTP listener, file listener, scheduler), Processors (transform, route, call), and Target (destination system). Sub-flows are reusable flow fragments without a source. Private flows can be called but not directly triggered. The developer exam tests Mule event structure and when to use each flow type.
DataWeave 2.0 Transformations
DataWeave is MuleSoft's transformation language — used to transform, filter, and map data. Key operators: map (transform array elements), filter (select matching elements), reduce (aggregate), pluck (transform object entries), groupBy (group array by key). Type system: String, Number, Boolean, Array, Object, Null, Any. Header declarations define input/output MIME types. %dw 2.0 output application/json --- means DataWeave version 2, output format JSON. The exam tests reading and writing DataWeave scripts for common transformation scenarios.
API Design with RAML and API-First
RAML 1.0 (RESTful API Modeling Language) defines API contracts. Structure: baseUri, version, mediaType, types (data types), traits (reusable method fragments), resourceTypes (reusable resource patterns). API Fragment types in Exchange: data types, traits, resource types, security schemes, examples. API-first development: design and mock the API spec, share with consumers for feedback, then implement. Mocking Service in Exchange lets consumers test against the spec before implementation is complete. The exam tests RAML syntax and API-first methodology.
Error Handling: On Error Continue vs Propagate
Error handling in Mule uses Try scope, On Error Continue, and On Error Propagate. On Error Continue: catches the error, executes the handler, and resumes the flow after the error scope — the client receives the handler's response. On Error Propagate: catches the error, executes the handler, and re-throws the error — the client receives an error response. Error types follow a hierarchy: ANY (catch all), CONNECTIVITY, EXPRESSION, ROUTING, SECURITY. The exam tests which handler type is appropriate and how error types are matched.
System APIs expose backend systems of record with a stable contract. Process APIs orchestrate logic across multiple System APIs. Experience APIs shape data for a specific consumer (mobile, web, partner). Each layer is independently reusable.
How to Pass the MuleSoft Developer I Exam
The MuleSoft Developer I exam tests foundational Anypoint Platform skills: building integrations in Anypoint Studio, using connectors, transforming data with DataWeave, and deploying to CloudHub. Focus on practical flow design and DataWeave syntax.
Mule 4 Flow Design
Know the three flow types: Flow (with message source), Sub-Flow (no source, called by reference), and Private Flow. Understand the flow lifecycle and how the Mule Message (payload, attributes, variables) changes through processors.
DataWeave 2.0 Fundamentals
DataWeave is the transformation language at the core of Mule 4. Know how to map, filter, transform, and coerce data types. Key functions: map, filter, mapObject, reduce, pluck, flatten, and type coercion operators.
Core Connectors
Know the key connectors: HTTP Listener/Request, Database, File/FTP, JMS/AMQP, Salesforce, and how to configure each. Understand connection pooling, reconnection strategies, and connection testing.
Error Handling
Know the error handling mechanisms: Try/Catch scope, On Error Continue vs. On Error Propagate, and Global Error Handlers. Understand error type hierarchy (MULE:CONNECTIVITY, HTTP:UNAUTHORIZED, etc.) and how to handle them.
Deployment to CloudHub
Know how to deploy a Mule application to CloudHub 1.0: environment selection, worker configuration (size and count), deployment properties, and how to monitor deployed applications.
Is the Salesforce Certified MuleSoft Developer Exam Hard?
DifficultyModerate; plan about 4-8 weeks of focused prep.
Book When ReadyScore 80%+ on three timed mocks before scheduling.
Use Practice, Not DumpsOriginal practice questions build skill without risking your credential.
Exam format: 60 questions, 120 min, 70% passing score.
Get the Full Question Bank
Most candidates book the exam after scoring 75%+ on full mocks.
If you’re planning to test this quarter, aim to complete full mocks at least 10–14 days before your exam date.
Want to ensure you pass on your first try? Contact us for more information on our full 60-question mock exams and a personalized study plan. You can also reach out to km.krishnamohan25@gmail.com.
Request Mock Exams & Study PlanSalesforce Certified MuleSoft Developer Exam FAQs
- What is covered on the Salesforce Certified MuleSoft Developer exam?
- The Salesforce Certified MuleSoft Developer exam—formerly Salesforce Certified MuleSoft Developer I— covers section-wise weightage as shown above. Use the exam topics and practice questions on this page to align your study with the official outline.
- What programming experience do I need for MuleSoft Developer I?
- You need programming experience (Java, JavaScript, or similar). You should understand APIs, data transformation, and basic integration concepts. MuleSoft uses DataWeave for transformations.
Next Certifications After Developer
After this certification, common next steps in the developer track: