How to document error responses in FastAPI
FastAPI generates an OpenAPI schema for you, but by default it says almost nothing about how your API fails. This guide builds that part of the sche…
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🔎 Building IncidentCopilot: Designing a Deterministic Log Correlation Engine
Milestone 4 of IncidentCopilot — an open-source, local-first AI DevOps Incident Copilot 📌 Introduction Logs are plentiful during outages — the chall…
How FastAPI turns type hints into a checked, documented API
I follow one request through FastAPI to show how one set of type hints drives the input checks, the editor help and the docs at /docs. A note on how…
Counting OpenAI Tokens per Request in FastAPI — Without Touching My Use Cases
I'm rebuilding evorag , a Python retrieval service: it chunks documents, embeds them with OpenAI's text-embedding-3-small , stores vectors in Postgr…
Django vs FastAPI: Which Python Developer Should You Hire?
Django or FastAPI? Hiring managers ask this before they have written a single job description, and the honest answer is that the framework matters l…
Flag Risky Signups in Python by IP: Tor, Hosting and Known VPN Networks
A FastAPI/Flask recipe that turns IP traits into an allow / verify / review decision, without locking out real users. Why hard-blocking VPN users ba…
I Built a Bilingual "Mini-Uber" for My Dad's Escalade Business
I Built a Bilingual "Mini-Uber" for My Dad's Escalade Business My dad drives a Cadillac Escalade. He's licensed in California (TCP permit — the real…
This 3-Line Python Mistake Can Disable Your Entire API Authentication
Ever written a security check that looked perfectly reasonable... until you realized it could let everyone in ? Here's a tiny Python mistake that ca…
Clean Architecture in Python with FastAPI, FastStream, and Dishka
One business logic layer, two entry points: HTTP and RabbitMQ. Here is the backend template I built with FastAPI, FastStream, and Dishka. This walkt…
Streaming LLM Output to the Browser Through Your Own Backend: FastAPI, Server-Sent Events and the Buffering Traps
I'm Aman Kumar. I build an OpenAI-compatible gateway, and one of the most common support questions I see isn't about models at all. It's "streaming…
Documedic Adds CDSS Comparison Page for Clinical Decision Support Evaluation
The Problem: Evaluating Clinical Decision Support Systems Without Bias Clinicians and informatics teams evaluating clinical decision support (CDSS)…
Marketing automation with built‑in analytics in Herald
Problem Indie developers and small teams ship code faster than they write about it. Herald automates the generation of blog posts and social copy fr…
Error Tracking API Guide: Choose 4 FastAPI Django SaaS Rollback Checks
Choose a small error-tracking API when the rollback decision depends on searchable exception events, not on traces, replay, or a full monitoring sui…
Stop Overpaying for APIs: When to Swap Your Cloud LLM for a Local SLM 🛠️
Let's face it: using an enterprise cloud LLM API to parse basic JSON, route support tickets, or clean up markdown is massive overkill. It's slow, ex…
Normalizing 30 Judges Without Lying About It: the maths, a counterintuitive k, and what I chose not to build
TL;DR. I built Rubrica , a self-hosted hackathon portal, for DOGFOOD 2026. The interesting part is not the feature list. It is a judging engine whos…
My RAG API Never Signs Tokens or Sees Passwords
Anyone who could reach my FastAPI RAG service could query every document in it. The quick fix was a /login route: check the password against Postgre…
WakeRide: Travel. Sleep. We'll Wake You. 🚍💤
Hi everyone! We recently worked on SafeTrack for a hackathon. It focuses on affordable autonomous navigation using smartphone sensors and real-time…
RecallDesk: Building the FastAPI Backend Behind an AI Support Memory System
RecallDesk: Building the FastAPI Backend Behind an AI Support Memory System In customer support applications, the frontend is where engineers intera…
Using Hindsight to Investigate Incidents Without Guessing
The alert looks familiar. The Payment API is timing out against its database, and I have a nagging feeling someone fixed this before. But that fix i…
Efficient FastAPI Learning: Avoiding Pitfalls in Async, Database, and Auth Integration
Introduction to FastAPI and Common Pitfalls FastAPI has emerged as a powerhouse for building high-performance web applications, thanks to its async…
FastAPI's new app.frontend() fixes a route-order bug in manual SPA serving
Put a FastAPI catch-all route above your API route by mistake and a request to /api/ping returns HTTP 200. The body is your single-page app's index.…
A stored-XSS report we couldn't quite reproduce, and hardened anyway
A researcher named Dhruv emailed us to report a stored XSS path: someone attaches a PDF with embedded JavaScript to a support ticket in our helpdesk…
CVE-2026-48710 (BadHost): How a Malformed Host Header Bypasses Starlette Path Authorization
CVE-2026-48710 (BadHost): How a Malformed Host Header Bypasses Starlette Path Authorization Vulnerability overview CVE-2026-48710, tracked publicly…
Why FastAPI geolocation middleware is the wrong tool
Search for FastAPI geolocation middleware and you'll get the same answer every time: subclass BaseHTTPMiddleware , call an IP lookup API, stash the…
Context Engineering for Production AI Agents in 2026: Beyond Prompt Engineering and Basic RAG
Introduction Prompt engineering taught teams how to talk to models. Context engineering teaches teams how to build systems that give the model the r…
How I Built a PDF Chat API in One Day with FastAPI, Gemini, and Qdrant
Have you ever wanted to just talk to a PDF instead of reading through 50 pages? I built a full PDF Chat API in one day — upload any PDF, ask questio…
Stop Stressing! Build a Real-Time HRV Anomaly Detector with Python and Scikit-Learn
Ever had your smartwatch buzz at you during a meeting, telling you to "take a breath," only to realize your heart is racing because of a 10 AM deadl…
nginx silently rejects the new HTTP QUERY method
RFC 10008 went to Proposed Standard in June. It adds QUERY, a new HTTP method. Safe and idempotent like GET, but it carries a body like POST. On pap…
I Made Claude Code Prove Billing End-to-End Before I Let It Ship
I’ve been using coding agents for a while, but during the last release of a SaaS project I changed one thing about how I used them. I stopped defini…
FastMCP 3 4 migration: the breaking changes that compile
FastMCP 4 is GA. If you have an MCP server or client on fastmcp 3.x, you'll upgrade soon. Most of it is painless — FastMCP(...) , @mcp.tool , and mc…