The desktop client for Anvil DB.
Hammer puts your Anvil database in a native app for macOS and Windows: Cypher and GraphQL editors, an interactive force-directed graph canvas, schema and document browsers, and the admin, security and monitoring tools, connected to any Anvil server you run.
Direct downloads: macOS · Windows · all releases
# macOS open Hammer-macos.dmg, drag Hammer to Applications
# Windows run Hammer-windows-x64.msi
Signed and notarised. No runtime to install, no browser tab.# Add a connection profile, then sign in with your Anvil account
Server https://anvil.example.com:7474
User your Anvil username
# One profile per server; switch between them any time# Every computer starts with a 14-day free trial
# Then: Settings, Licence, paste your key
HMR-eyJ2IjoxLCJpZCI6ImxpY18... (one key per computer)
# Keys: devforge.io/products/hammer/purchaseThe whole workbench, on your desktop.
Hammer is the control room for Anvil DB, packaged as a desktop app. Write Cypher and GraphQL with rich result views, explore relationships on an interactive canvas, browse schema and documents, and manage row-level security, functions, triggers, users and monitoring. Point it at any Anvil server, on your laptop or in production; it signs in with your Anvil account and shows only what your role allows.
Cypher and GraphQL editors
Write Cypher or explore the auto-generated GraphQL API, with table, JSON, graph and query-plan result views, plus full schema introspection.
Interactive graph canvas
A D3 force-directed canvas with focus mode, neighbour orbit, lasso select, a minimap, four layouts and PNG/SVG export.
Schema and document browser
Browse labels, relationship types, property keys, indexes and constraints, and do full collection CRUD with a JSON editor and sync rules.
Security and access control
Create and simulate row-level security policies, toggle RLS, and manage users and roles. Admin-only pages are enforced in the app and by the server.
Functions and triggers
Author, test and manage stored Cypher functions and event-driven triggers, with an activity log and dependency analysis.
Live monitoring
Real-time server stats, a slow-query log, an event log and an alerts panel, so you can watch the database as it runs.
Download it, try it free, license it per computer.
Hammer is distributed only as a desktop app. There is nothing to host and nothing to build: download the installer for your platform, connect it to your Anvil servers, and buy a key when the trial ends.
Download
One universal installer for macOS, covering Apple silicon and Intel, and a 64-bit installer for Windows. Builds are signed and notarised, and every version is published on GitHub with its release notes.
Licence
Every computer gets a 14-day free trial, no account needed. After that a licence is US$100 per key per year, one key per computer, bought with your Devforge account so you can move a key to a new machine or cancel any time. Hammer checks in on launch and every six hours, and a cached check keeps it working offline for up to 14 days.