GraphJin – Build APIs in 5 minutes

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GraphJin gives you a high performance GraphQL API without you having to write any code. GraphQL is automagically compiled into an efficient SQL query. Use it either as a library or a standalone service.


GraphJin is an Apache-licensed open source project with its ongoing development made possible entirely by the support of these awesome backers. If you’d like to join them, please consider:


1. Quick Install

Mac (Homebrew)

brew install dosco/graphjin/graphjin

Ubuntu (Snap)

sudo snap install --classic graphjin

Debian and Redhat (releases)

Download the .deb or .rpm from the releases page and install with dpkg -i and rpm -i respectively.

Go Install

go get

2. Create New API

graphjin new <app_name>

cd <app_name>
docker-compose run api db:setup
docker-compose up

About GraphJin

After working on several products through my career I found that we spend way too much time on building API backends. Most APIs also need constant updating, and this costs time and money.

It’s always the same thing, figure out what the UI needs then build an endpoint for it. Most API code involves struggling with an ORM to query a database and mangle the data into a shape that the UI expects to see.

I didn’t want to write this code anymore, I wanted the computer to do it. Enter GraphQL, to me it sounded great, but it still required me to write all the same database query code.

Having worked with compilers before I saw this as a compiler problem. Why not build a compiler that converts GraphQL to highly efficient SQL.

This compiler is what sits at the heart of GraphJin, with layers of useful functionality around it like authentication, remote joins, rails integration, database migrations, and everything else needed for you to build production-ready apps with it.

Better APIs Faster!

Lets take for example a simple blog app. You’ll probably need the following APIs user management, posts, comments, votes. Each of these areas need apis for listing, creating, updating, deleting. Off the top of my head thats like 12 APIs if not more. This is just for managing things for rendering the blog posts, home page, profile page you probably need many more view apis that fetch a whole bunch of things at the same time. This is a lot and we’re still talking something simple like a basic blogging app. All these APIs have to be coded up by someone and then the code maintained, updated, made secure, fast, etc. We are talking weeks to months of work if not more. Also remember your mobile and web developers have to wait around till this is all done.

With GraphJin your web and mobile developers can start building instantly. All they have to do is just build the GraphQL queries they need and GraphJin fetches the data. Nothing to maintain no backend API code, its secure, lighting fast and has tons of useful features like subscriptions, rate limiting, etc built-in. With GraphJin your building APIs in minutes not days.


  • Works with Postgres, MySQL8 and Yugabyte DB
  • Complex nested queries and mutations
  • Realtime updates with subscriptions
  • Build infinite scroll, feeds, nested comments, etc
  • Auto learns database tables and relationships
  • Role and Attribute-based access control
  • Opaque cursor-based efficient pagination
  • Full-text search and aggregations
  • JWT tokens supported (Auth0, JWKS, Firebase, etc)
  • Join database queries with remote REST APIs
  • Also works with existing Ruby-On-Rails apps
  • Rails authentication supported (Redis, Memcache, Cookie)
  • A simple config file
  • High performance Go codebase
  • Tiny docker image and low memory requirements
  • Fuzz tested for security
  • Database migrations tool
  • Database seeding tool
  • OpenCensus Support: Zipkin, Prometheus, X-Ray, Stackdriver
  • API Rate Limiting
  • Highly scalable and fast



Quick Start


Build APIs in 5 minutes with GraphJin

GraphQL vs REST

GraphQL Examples

Using it in your own code

go get
package main

import (

  _ ""

func main() {
  db, err := sql.Open("pgx", "postgres://postgres:@localhost:5432/example_db")
  if err != nil {

  sg, err := core.NewGraphJin(nil, db)
  if err != nil {

  query := `
    query {
      posts {

  ctx := context.Background()
  ctx = context.WithValue(ctx, core.UserIDKey, 1)

  res, err := sg.GraphQL(ctx, query, nil)
  if err != nil {


Reach out

We’re happy to help you leverage GraphJin reach out if you have questions


discord/graphjin (Chat)

Production use

The popular site for discovering trending papers in AI and Computer Science uses GraphJin for it’s entire backend.


Apache Public License 2.0

Copyright (c) 2019-present Vikram Rangnekar