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Visualize FastAPI endpoints with FastAPI-Voyager

Visualize FastAPI endpoints with FastAPI-Voyager

8 comments

·November 9, 2025
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brulard

I would appreciate some quick info what this is all about. Clicking on link presents me with a huge diagram i know nothing about. What am I looking at?

tank-34

this project is inspired by https://apis.guru/graphql-voyager/, which visualize the entity relationships based on graphviz and add fancy ui effects.

fastapi-voyager, from left to right, is tag, routes(apis) and response_models, it indicates the internal relationship between routes, which can help developers/PO easily figure out the data structure.

agumonkey

Pretty nice

tonyhart7

ok, how is this better than OpenAPI schema???

tank-34

in swagger, from the definition of schema you are not able to easily figure out the related class, the name is marked as <object> or array<object>

in voyager their relationships are visualized and very close to the source code.

throwaway0X13

Mapping software in /src/ modding, either with GIS software for positional API voyaging, which designate the tiers for endpoints.

tank-34

heere is the repo: https://github.com/allmonday/fastapi-voyager

tank-34

scroll to zoom in/out

pick tag/routes at left panel, and see subgraphs

double click to see field table and source code, click link to see source code in github

click focus to hide other nodes.

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