Add secure library for consistent HTTP security headers in FastAPI

[cak]

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name: Add a new project
about: Suggest a new FastAPI project for the Awesome FastAPI list
title: "[NEW] secure"

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Pull requests that delete this template, leave sections blank, or ignore the requirements will be closed without review.

Project Information

1. Project Name:
   secure

2. Project URL:
   https://github.com/TypeError/secure

3. Description:

A small library for defining and applying HTTP security headers consistently in FastAPI applications using ASGI middleware.

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Criteria

1. Is the project new?

• Yes
• No

2. How long has the project been maintained?

Originally created several years ago and recently updated with a new v2 design focused on composability, middleware support, and safer header handling.

3. How many releases has it had if it's a library or package?

See release history:
https://github.com/TypeError/secure/releases

4. Are you the author, or are you submitting the project on behalf of a company?

• I am the author
• I am submitting on behalf of a company
• Other (please specify)

5. What makes it awesome?

It addresses a common gap in FastAPI applications where HTTP security headers are defined inconsistently across middleware, response hooks, and handlers.

The library centralizes header configuration in a single object and applies it through ASGI middleware, making it easier to keep policies like CSP consistent as applications grow.

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AI Disclosure

• Yes, this pull request was generated or assisted by AI.
• No, this pull request was authored entirely by a human.

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Additional Information

The project is intentionally small and dependency-free, with a focus on clarity and predictable behavior.

It supports both middleware-based integration and direct response usage, allowing it to fit naturally into existing FastAPI applications without requiring architectural changes.