Store your keys once. Build request templates with fillable fields. Get answers in a clean split-screen interface. No $14/seat pricing. No download.
The popular API tools come with baggage. DevBook skips all of it.
Postman charges per seat, per month. Teams of 5 pay $70/mo for what should be a developer utility. DevBook is free — no seats, no tiers, no surprises.
Postman's Electron app ships 300MB+ and launches like it's loading an IDE. DevBook is a web app. Open a tab, start working. Close it when you're done.
Postman syncs your collections, keys, and environments to their servers. DevBook stores your API keys in your own account. Your requests stay yours.
The book is and sold through Amazon and the author’s website.
Graph processing, Dijkstra's algorithm modifications (A* search), and tiling architectures to break down global maps into manageable chunks.
Sketch an end-to-end architecture. Show clients, APIs, load balancers, web servers, databases, and caches. Walk the interviewer through the data flow and get their approval before moving forward. Step 3: Design Deep Dive
Designing a highly available, fault-tolerant, and ultra-high-throughput message broker.
: Ingesting and querying millions of data points per second from infrastructure.
: Zoom into the core bottlenecks. Discuss data replication, cache eviction policies, rate limiting, and single points of failure.
The book is and sold through Amazon and the author’s website.
Graph processing, Dijkstra's algorithm modifications (A* search), and tiling architectures to break down global maps into manageable chunks.
Sketch an end-to-end architecture. Show clients, APIs, load balancers, web servers, databases, and caches. Walk the interviewer through the data flow and get their approval before moving forward. Step 3: Design Deep Dive
Designing a highly available, fault-tolerant, and ultra-high-throughput message broker.
: Ingesting and querying millions of data points per second from infrastructure.
: Zoom into the core bottlenecks. Discuss data replication, cache eviction policies, rate limiting, and single points of failure.
No collections. No environments. No workspaces. Just the parts of API testing you actually use.
Paste your keys into the vault — Stripe, OpenAI, Twilio, whatever you use. Reference them with a variable name across every template. One entry, everywhere.
Define your HTTP request and mark dynamic parts with . DevBook generates a fillable form. No raw JSON editing, no config files.
Fill in the blanks, hit send, see your response instantly. Every template is saved and searchable. Build a library of the API calls your workflow depends on.
No download. No credit card. No seat licenses. The API workbench that gets out of your way.
Start your 2-week free trial →No credit card required to get started