OpenAPI Endpoint Filtering & Route Pruning Protocol

Overview

When generating an API integration client or debugging a REST webhook, agents often ingest the entire openapi.json or swagger.yaml specification file.

In enterprise platforms (Stripe, GitHub, AWS, Kubernetes), complete OpenAPI specifications span 15,000 to 60,000 lines of JSON (consuming 80,000 to 250,000 tokens). Ingesting the full spec crashes context windows and costs dollars per query - even if the developer only wants to integrate a single endpoint (POST /v1/refunds).

The OpenAPI Endpoint Filtering Protocol parses the specification locally and extracts strictly the target path, its HTTP method parameters, and its transitively resolved $ref schema components.

Monolithic OpenAPI Spec vs. Targeted Endpoint Slice