What is this programme?
The REST API Design & Integration Certificate is an independent, self-paced online course from ecertificate.pro that covers resource modeling, HTTP method and status code semantics, authentication, versioning and error contracts. It takes roughly 24 hours and finishes with a graded assessment plus a design exercise where you publish an OpenAPI 3.1 document together with its error catalogue and deprecation policy. ecertificate.pro is a private training provider that has issued certificates since 2016; this certificate is not government approved, not academically accredited, grants no professional license or protected title, and does not guarantee employment. The finished certificate is delivered inside your private dashboard rather than as an email attachment, and each one carries a unique verification code that can be checked only in the ecertificate.pro database — no third-party registry is involved. It fits developers and integration engineers who want a documented, repeatable method for designing HTTP APIs that other teams can consume without surprises.
Who it is for
Backend and full-stack developers who ship HTTP services, integration and QA engineers who consume third-party APIs, API product owners, and technical writers who document endpoints. Also suited to teams trying to standardise API guidelines across several services.
What you will be able to do
- Turn a domain model into a resource hierarchy with stable identifiers, predictable URI rules and nesting limits a whole team can apply consistently
- Pick the correct method and status code for every operation, including 201 with a Location header, 202 for async jobs, and 409/412 for conflict and precondition failures
- Publish an RFC 9457 problem+json error contract with stable machine-readable codes, field-level validation details and a correlation id for support triage
- Protect endpoints with OAuth 2.1 client credentials or authorization code + PKCE, verifying JWT issuer, audience, expiry and signature against a rotating JWKS
- Evolve an API without breaking consumers using additive-only changes, tolerant reader rules, and Deprecation plus Sunset headers with a dated migration window
- Keep large collections fast with cursor pagination, ETag revalidation, sparse fieldsets and quota enforcement via RateLimit headers and 429 with Retry-After
- Produce an OpenAPI 3.1 document and wire spec linting, mock servers and contract tests into CI, then harden the calling side with timeouts, retries and backoff
Modules
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1
Resource Modeling and URI Design
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2
HTTP Method Semantics, Safety and Idempotency
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3
Status Codes and Response Shapes
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4
Error Contracts with Problem Details (RFC 9457)
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5
Authentication and Authorization for APIs
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6
Versioning, Deprecation and Backward Compatibility
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7
Collections at Scale: Pagination, Caching and Quotas
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8
OpenAPI 3.1, Contract Testing and Resilient Integration
How it works
Learning format
Self-paced written material, downloaded from your dashboard. No fixed schedule and no live sessions — you work through it when it suits you.
Material delivery
Everything appears in your dashboard as soon as your payment is confirmed. Files are served only to your signed-in session.
Prerequisites
Working knowledge of HTTP request/response basics and JSON. You should have called at least one web API with curl or an API client. No specific language, framework or cloud account is required — a free API client (curl, Postman, Insomnia or similar) and a text editor are enough.
Completion
You work through the eight modules and then take a graded final assessment: scenario questions on method, status code and versioning decisions, plus a design exercise in which you publish an OpenAPI 3.1 document for a small service including its error contract and deprecation policy. A score of 70% or higher releases the certificate into your private ecertificate.pro dashboard; the assessment can be retaken if you do not pass on the first attempt.
Your certificate
Once your completion is confirmed, we prepare your certificate and upload it to your dashboard, normally within 24–48 hours. You receive an e-mail as soon as it is there — you never have to chase it.
Refunds
Because the material is delivered digitally and immediately, purchases are non-refundable once the files have been made available to your account. The full terms are in our Refund Policy.
