MuleSoft API Development
Design-First. Consumer-Ready.

RAML 1.0 (RESTful API Modelling Language) is MuleSoft's native API specification format — deeply integrated with Anypoint Platform, Anypoint Exchange, and the API Designer tool. It supports RAML fragments (shared data types, traits, and resource types) that enforce consistency across a specification portfolio. OAS 3.0 (OpenAPI Specification) is the industry-standard format supported by most API tools, gateways, and documentation generators. Both are supported in Anypoint Platform. We recommend RAML 1.0 for MuleSoft-native portfolios because of the fragment reuse capability, and OAS 3.0 when the API will be consumed by teams using non-MuleSoft tooling.

A mock service is a working HTTP endpoint deployed from the API specification — returning realistic example payloads for every endpoint and scenario — without any backend implementation. When we deploy a mock service to Anypoint Exchange from the published RAML or OAS 3.0 specification, consumer teams can begin integration development immediately, in parallel with our backend implementation sprint. In practice this means consumer integrations are typically 6 to 8 weeks ahead of where they would be if teams waited for the real API to be ready. The mock also serves as a living contract — if the implementation diverges from the spec, the mock highlights the inconsistency.

RAML fragments are modular, reusable RAML components — shared data types, traits (sets of query parameters, headers, or responses), resource types, security schemes, and annotations — published to Anypoint Exchange and imported by multiple API specifications. They are important because they enforce consistency at the type level rather than the review level. If every API in your portfolio imports the same Customer data type fragment and the same error response trait, it is structurally impossible for individual specifications to define customer differently or use different error formats. We build and maintain RAML fragment libraries for every client.

API Manager policies are governance rules applied to APIs deployed on Anypoint Platform — controlling authentication, authorisation, traffic management, threat protection, and header manipulation. Policies are applied to an API instance in API Manager and enforced by the Anypoint Gateway or Mule runtime, without modifying the Mule application code. This means security and rate limiting are applied consistently across all API instances, can be updated centrally without redeploying the Mule application, and are visible in Anypoint Analytics for monitoring. We configure OAuth 2.0, JWT validation, client ID enforcement, SLA-tiered rate limiting, TLS, and custom policies for every API.

Yes. We have designed FHIR R4-compliant APIs for healthcare clients, FDX-compliant APIs for financial data exchange, and HL7 2.x message-based APIs using RAML. For standards-based API design, we build the standard resource types and data types as RAML fragments — so the compliance standard is enforced at the fragment level across your entire specification portfolio, not manually checked in each individual specification.

API versioning is the strategy for managing changes to an API contract without breaking existing consumers. We implement URI versioning (e.g. /v1, /v2) as the default for MuleSoft APIs because it is explicit and discoverable. We define a deprecation policy at the start of every engagement — the minimum notice period before a version is retired, how deprecation notices are communicated to consumers, and what migration support is provided. Breaking changes are identified using a change impact assessment before any new version is published, and consumer migration guides are produced for every breaking change. We never retire an API version without a documented consumer migration path.

Yes. We run API specification audits — reviewing consistency of naming conventions, completeness of request and response schemas, quality of example payloads, error response coverage, security scheme declarations, and pagination pattern standardisation — producing an API Quality Report with specific remediation recommendations. We then either remediate the specifications ourselves or provide a specification quality checklist and training your team can use to remediate independently.

Yes. While Anypoint Exchange is the default publication target for MuleSoft APIs, we also publish to external developer portals — including Apigee Developer Portal, Gravitee, Kong Developer Portal, Swagger Hub, and custom developer portals built on your own infrastructure. Where Anypoint Exchange is the internal catalogue and an external portal is required for partner or third-party consumer access, we configure both — synchronising specification updates to both platforms.

A single API specification — discovery, design, RAML writing, mock service deployment, and Exchange publishing — typically takes 1 to 3 weeks depending on complexity. A portfolio of 5 to 10 API specifications with a shared RAML fragment library typically takes 4 to 8 weeks. A full enterprise API portfolio covering 15 to 25 APIs across multiple domains typically takes 3 to 5 months. We scope every engagement individually and provide a fixed timeline and price before work begins.