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API Design and Contracts with Agents

Agents can generate endpoints in minutes, but a consistent, well-documented API is a design decision, not a by-product. In this hands-on workshop you work contract-first: you define and review the API contract, let agents implement servers, clients and tests against it, and verify that code and contract stay in sync. We use your stack or a sandbox project.

Request without obligation

Deutsche Version

Duration
1 day
Level
Intermediate
Format
Remote or on-site, English or German
Group size
Up to 12 participants per trainer

Who it is for

  • Backend developers and API designers
  • Frontend and mobile developers who consume APIs
  • Tech leads responsible for API standards across teams

What your team will be able to do

  • Design an API contract first and review it before implementation
  • Apply naming, error handling, pagination and versioning conventions
  • Generate server stubs, clients and tests from a contract with an agent
  • Use contract tests to detect drift between code and specification
  • Review agent-generated endpoints for security and consistency

Agenda

  1. Contract-first thinkingWhy the specification comes before the code, and how agents change the economics of both.
  2. Designing the contractResources, operations, errors and conventions, drafted with an agent and reviewed by humans.
  3. Implementation against the contractGenerate server code and clients, and keep the agent within the agreed interface.
  4. Contract and integration testsValidate responses against the specification and catch breaking changes automatically.
  5. Versioning and evolutionPlan non-breaking changes, deprecation and communication with consumers.
  6. Security and review of generated APIsCheck authentication, authorization, input validation and data exposure in agent-written endpoints.

Prerequisites

  • Experience building or consuming HTTP APIs
  • Basic familiarity with OpenAPI or a comparable description format is helpful
  • Access to a coding agent

Why apprat.io workshops

  • Taught by practising AI Code Engineers
  • Your repositories or a sandbox project
  • AI speed, human responsibility: review, security and governance included
  • ISO 9001 & ISO/IEC 27001 certified processes
  • Follow-up office hours after 30 days

Request without obligation

Tell us about your team and goals. We reply within one business day with a tailored agenda and a quote – free and without obligation.

24/7 call support in English & German:
+49 761 519 751 50

Frequently asked questions

Do you cover GraphQL or gRPC?

The contract-first principles apply there too. We focus on REST with OpenAPI by default and can adapt examples to your technology.

Can we work with our existing API?

Yes, an existing API is a good basis for documenting the contract and finding inconsistencies.

Which language do we code in?

Your stack. The contract is language-independent, and the agent adapts to your framework.

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