Hanzo DocDB
Documents on the MongoDB wire, stored in Hanzo SQL
DocDB answers the MongoDB wire protocol on 27017 and stores nothing itself: it translates each command into SQL and runs it against Hanzo SQL. Your driver connects, your documents go in as documents — and the same data is sitting in a database you can also point a SQL client at, back up and replicate the way you already do.
A document store with a SQL database under it
Write documents. Keep every operational habit you already have.
The wire protocol, not a REST shim
DocDB speaks MongoDB 5.0 and later on the wire, so pymongo, mongoose, the Go driver and mongosh connect to it directly. Around sixty commands are implemented — find, insert, update, delete, findAndModify, distinct, count, createIndexes, explain and the rest.
Aggregation runs in the database
A pipeline is translated to SQL and executed where the data is, not pulled across the wire and reduced in your process. explain returns the plan the query actually took — a Hanzo SQL plan, for something you wrote as a pipeline.
Transactions, and someone else's durability
Multi-document writes commit or roll back together under Hanzo SQL's MVCC. Backups, point-in-time recovery and replicas belong to the database — DocDB holds no state of its own, so there is nothing here that can be lost separately.
Indexes are real indexes
createIndex from the driver builds a Hanzo SQL index, and listIndexes reads back what is actually there. Nothing is emulated in a layer above the planner, so an index you create is one the planner can use.
The SQL side door
The documents are rows in Hanzo SQL, so a reporting tool, a dbt model or a psql session can read them where they sit. The reporting copy and the operational copy are the same copy.
An HTTP door and an agent door
The same collections answer over plain HTTP — /action/find, /action/insertOne, /action/aggregate and the rest, with an OpenAPI document to generate from — and over the Model Context Protocol, so an agent can list databases and query them with no driver at all.
Connect the driver you already have
import { MongoClient } from 'mongodb';
// Same driver. New connection string.
const client = new MongoClient(process.env.HANZO_DOCDB_URI);
await client.connect();
const orders = client.db('shop').collection('orders');
// Aggregation pipelines run unchanged
const top = await orders.aggregate([
{ $match: { status: 'paid' } },
{ $group: { _id: '$customer_id', total: { $sum: '$amount' } } },
{ $sort: { total: -1 } },
{ $limit: 10 },
]).toArray();