We design, specify, and build APIs on MuleSoft Anypoint Platform that consumers can actually use — starting with RAML or OAS 3.0 specifications and mock services before a line of implementation code is written. Every API is published to Anypoint Exchange with documentation, governed through API Manager, and built to be reused across your integration portfolio.
From the initial API design workshop through specification writing, mock service creation, implementation, governance policy configuration, documentation, and Exchange publishing — every stage of the API development lifecycle covered.
We write RAML 1.0 and OAS 3.0 REST API specifications — covering every endpoint, method, request/response schema, query parameter, header, error response, and pagination pattern — reviewed with stakeholders before implementation begins.
We build working mock services from every API specification — deployed to Anypoint Exchange so consumer teams can begin integration development immediately, without waiting for the backend implementation to be ready.
We publish every API specification, mock service, connector, RAML fragment, and DataWeave module to Anypoint Exchange — with documentation, tagging, versioning, and consumer portal configuration — making your API portfolio discoverable and self-service.
We configure API Manager policies for every API — OAuth 2.0, JWT validation, client ID enforcement, rate limiting by SLA tier, IP whitelisting, TLS, and threat protection — applied consistently across your entire API portfolio rather than configured per-integration.
We design and implement a versioning strategy for your API portfolio — URI versioning, header versioning, or content negotiation — including deprecation notices, migration guides for consumers, and backward compatibility policies to prevent breaking consumer integrations.
We build a RAML fragment library — shared data types, traits, resource types, security schemes, and annotations — that eliminates repetition across your API specification portfolio and enforces consistent design patterns at the type level.
We produce consumer-facing API documentation — including interactive API reference, code examples in multiple languages, authentication guide, error code reference, and quick-start tutorial — published through Anypoint Exchange or your developer portal.
We implement contract testing between API producer and consumer — using RAML-based test suites and MUnit to verify that the implementation conforms to the published specification, catching specification drift before it reaches consumers.
Every API we design follows a consistent set of principles — derived from MuleSoft best practices, REST standards, and hard-won experience of what breaks consumer adoption when it is missing.
We start every API design by asking what the consumer needs — not what the backend exposes. The API contract is shaped by the consumer use case. The implementation adapts to the contract. Never the other way around.
We write the full RAML or OAS 3.0 specification, deploy a mock service, and get consumer sign-off before a single line of Mule 4 implementation code is written. This eliminates the most expensive type of rework in API development.
All APIs in a portfolio must follow the same naming conventions, error formats, pagination patterns, date formats, and authentication scheme. Inconsistency multiplies consumer friction — every API that behaves differently forces consumers to learn a new pattern.
API versioning is designed in from the first specification — not added as an afterthought when a breaking change is needed. We design deprecation timelines, backward compatibility commitments, and consumer migration paths before the first version is even published.
Authentication, authorisation, rate limiting, and TLS configuration are applied to every API before it leaves the design phase — not added to the API Manager backlog after go-live. Security is a design requirement, not a deployment step.
Every API is published to Anypoint Exchange with complete documentation, tagged for searchability, and configured with a mock service that allows a new consumer to evaluate the API in under 15 minutes without contacting the API team.
An API is not a one-time deliverable — it is a product with a lifecycle. We cover every stage from design through deprecation, so your APIs are maintained and evolved rather than abandoned.
A RAML specification written by our team is complete, consistent, and consumer-ready — covering every field, data type, example value, error scenario, and annotation required for a consumer to integrate with confidence.
#%RAML 1.0 title: Customer System API version: v1 baseUri: https://customer-sys-api.cloudhub.io/api/{version} mediaType: application/json protocols: [ HTTPS ] uses: Customer: exchange_modules/types/customer-type.raml Errors: exchange_modules/traits/error-responses.raml securitySchemes: oauth_2_0: type: OAuth 2.0 settings: accessTokenUri: https://auth.rackwave.io/oauth/token authorizationGrants: [ client_credentials ] /customers: securedBy: [ oauth_2_0 ] get: displayName: List Customers description: | Returns a paginated list of customers. Filter by status, region, or creation date range. queryParameters: status: type: string enum: [ active, inactive, suspended ] required: false example: active limit: type: integer minimum: 1 maximum: 100 default: 20 required: false responses: 200: body: type: Customer.CustomerPage examples: success: !include examples/customers-list-200.json 400: !include Errors.badRequest 401: !include Errors.unauthorized 500: !include Errors.serverError
Every field in a Rackwave API specification serves a purpose — and nothing is left ambiguous for the consumer to discover at implementation time.
A consumer-first, specification-driven process — every API starts with a consumer workshop and ends with a working mock in Exchange before the implementation sprint begins.
We run a structured workshop with the API consumer teams — understanding exactly what data they need, in what format, at what latency, and under what authentication scheme — before designing a single endpoint. The consumer use case defines the contract.
We design the API contract — endpoint structure, HTTP methods, request and response schemas, error codes, query parameters, pagination, and versioning strategy — in collaboration with both producer and consumer teams, documented as a design decision log.
We write the full RAML 1.0 or OAS 3.0 specification — using shared RAML fragments for data types and error responses, with realistic example payloads for every response, enum constraints on every restricted field, and OAuth 2.0 declared at the specification level.
We deploy a working mock service to Anypoint Exchange from the specification — with realistic response payloads for success and error scenarios. Consumer teams begin integration development immediately, in parallel with our implementation sprint.
We implement the API in Mule 4, using the published specification as the contract — with DataWeave transformations, error handling, connector integration, and MUnit contract tests that verify the implementation matches the specification at every build.
We apply API Manager policies to the live API — OAuth 2.0, rate limiting by SLA tier, client ID enforcement, and TLS — then configure client application registration so consumers can request access through the Exchange portal without manual intervention.
We finalise the Exchange publishing — interactive API reference, quick-start guide, code examples, authentication walkthrough, and error code reference — then configure the consumer portal access controls so internal and external consumers can discover and onboard themselves.
The most expensive API problem is discovering that the contract does not match what consumers need — after the implementation is already built. Our design process prevents that discovery from happening.
We run the consumer workshop before the design workshop — because the consumer use case defines the contract. We have seen too many APIs designed by the backend team and then complained about by the consumers who could not use them.
Consumer teams integrating against our mocks can start 6 to 8 weeks earlier than those waiting for backend implementation. We have never had a consumer team complain that the mock was available too early.
Anypoint Exchange is not a documentation afterthought — it is the primary API artefact. Every specification, fragment, example, and policy is published to Exchange first, and consumed from Exchange by both implementation teams and API consumers.
We build shared RAML fragment libraries for every client — data types, error responses, security schemes, and traits — so API specification quality is enforced at the type level, not at the review level. Inconsistency becomes structurally impossible.
We implement RAML-to-MUnit contract tests that run in CI/CD on every build — verifying that the implementation matches the published specification. Specification drift is caught automatically, not in a consumer issue report.
We train your internal API design team — running workshops on RAML 1.0, OAS 3.0, Exchange publishing, and API Manager policy design — so your organisation builds the internal capability to maintain and extend your API portfolio without us.
API design on MuleSoft requires expertise across Anypoint Platform, RAML, API Manager, and the cloud platform it deploys to. Every designer on your project holds active certifications in these areas.
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Explore MoreConsistent, consumer-ready APIs — published to Anypoint Exchange, governed through API Manager, and adopted by consumer teams in days rather than weeks.
Within eight months of implementation, with the full API layering approach in place and legacy migra...
Real feedback from teams who can now discover, onboard, and integrate with APIs in days — not weeks of chasing the backend team for documentation.
"Before Rackwave, our API specifications were incomplete Word documents shared on a SharePoint that nobody trusted. Now we have 22 published RAML specs on Exchange with working mocks, consumer documentation, and self-service onboarding. Our integration teams have stopped asking for help getting started — they can do it themselves."
"The mock-first approach Rackwave used meant our mobile team started integrating 6 weeks before the backend was ready. By the time the real API went live, the mobile integration was already tested and working against the mock. That kind of parallelism is worth far more than the API design cost."
"FHIR-compliant RAML specifications with a shared HL7 fragment library — I did not believe it was possible to achieve in 8 weeks. Rackwave delivered the full spec, mock services, and API Manager governance setup on time. The specification quality was the best our NHS partner had seen from any supplier."
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Everything you need to know about our MuleSoft API Development services.
Design-first API development means writing the full API specification — in RAML or OAS 3.0 — and getting it reviewed and approved by both producer and consumer teams before any implementation code is written. It matters because the most expensive problem in API development is discovering that the contract does not match what consumers need after implementation is complete. A RAML specification can be changed in hours. A Mule 4 implementation and downstream consumer integrations built on the wrong contract take weeks to fix. Every API we design starts with the specification.
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.
