Browse the Agensi Store

Professional API design and review skill for REST, GraphQL, and event-driven architectures.

Expert API architect to design, review, and audit REST, GraphQL, and event-driven API specifications.

API Contract Guardian for AI Coding Agents

by Shandra

$9.99

or 50 cr

Protects API endpoints from accidental breaking changes by generating contract maps, validation rules, integration tests, documentation, and safe AI coding prompts.

Automatically validate OpenAPI specs, detect breaking changes, and sync API implementation with documentation.

🛡️OpenAPI Contract Guard

by JustHandled Labs

$12

or 60 cr

Lint an OpenAPI spec and diff two versions to catch breaking API changes before they reach consumers. Within a spec it flags missing operationId, success responses with no schema, untyped parameters, operations with no security requirement, and unbounded arrays/strings. Across two versions it flags removed paths and operations, removed response codes, a parameter becoming required, narrowed parameter types, removed enum values, and removed response fields. Analyzes JSON specs (convert YAML to JSON first).

API Rate Limiter Designer

by Arnstein Larsen

$8.99

or 45 cr

Rate limiting fails in two directions: too loose and one bad client takes down the database for everyone; too crude and you rate-limit your own legitimate power users into churn

API Contract Designer

by Arnstein Larsen

$9.99

or 50 cr

Expert API architect for designing consistent REST/GraphQL contracts, resource models, and OpenAPI specs.