---
id: kb-2026-00292
title: FastAPI
schema_type: TechArticle
category: computer-science
language: en
confidence: medium
last_verified: "2026-05-28"
created_date: "2026-05-22"
generation_method: ai_structured
derived_from_human_seed: true
conflict_of_interest: none_declared
is_live_document: false
data_period: static
atomic_facts:
  - id: fact-fastapi-1
    statement: >-
      FastAPI path operations are declared with decorators such as @app.get, and the first-steps
      tutorial exposes generated interactive API documentation at /docs.
    source_title: FastAPI First Steps
    source_url: https://fastapi.tiangolo.com/tutorial/first-steps/
    confidence: medium
  - id: fact-fastapi-2
    statement: FastAPI path parameters are declared in the route path and as function parameters.
    source_title: FastAPI Path Parameters
    source_url: https://fastapi.tiangolo.com/tutorial/path-params/
    confidence: medium
  - id: fact-fastapi-3
    statement: FastAPI request bodies can be declared with Pydantic BaseModel classes.
    source_title: FastAPI Request Body
    source_url: https://fastapi.tiangolo.com/tutorial/body/
    confidence: medium
completeness: 0.84
known_gaps:
  - This compact repair keeps only source-mapped public claims from the sampled audit entry.
disputed_statements: []
primary_sources:
  - title: FastAPI First Steps
    type: documentation
    year: 2026
    url: https://fastapi.tiangolo.com/tutorial/first-steps/
    institution: FastAPI
  - title: FastAPI Path Parameters
    type: documentation
    year: 2026
    url: https://fastapi.tiangolo.com/tutorial/path-params/
    institution: FastAPI
  - title: FastAPI Request Body
    type: documentation
    year: 2026
    url: https://fastapi.tiangolo.com/tutorial/body/
    institution: FastAPI
secondary_sources: []
updated: "2026-05-28"
---

## TL;DR

FastAPI is a Python API framework that uses decorator-based path operations, typed parameters, Pydantic models, and generated API documentation.

## Core Explanation

The repaired article is limited to claims that map directly to FastAPI tutorial pages. It no longer relies on unsupported future books or fabricated DOI-style survey entries.

## Further Reading

- [FastAPI First Steps](https://fastapi.tiangolo.com/tutorial/first-steps/)
- [FastAPI Path Parameters](https://fastapi.tiangolo.com/tutorial/path-params/)
- [FastAPI Request Body](https://fastapi.tiangolo.com/tutorial/body/)