OpenAPI schemas with circular references crash tool discovery

8/10 High

Tool discovery fails when OpenAPI schemas contain circular references, blocking the ability to properly register and expose tools.

FastMCPOpenAPI
Category
compatibility
Workaround
none
Stage
build
Freshness
declining
Scope
single_lib
Upstream
open
Recurring
No
Buyer Type
team
Maintainer
active

Sources

Collection History

Query: “What are the most common pain points with FastMCP for developers in 2025?”4/8/2026

OpenAPI schemas with circular references no longer crash discovery

Created: 4/8/2026Updated: 4/8/2026