Anvil Plugins

Plugins that help developers integrate Anvil's document automation APIs into their applications. Built for Claude Cowork, also compatible with Claude Code.

Plugins

Plugin	How it helps
anvil-document-sdk	Implement Anvil API integrations — PDF Filling, HTML-to-PDF Generation, Etch E-Sign, and Workflows — into any existing Node.js or TypeScript codebase.
dropbox-anvil-migration	Migrate existing DropboxSign/HelloSign e-signature integrations to Anvil Etch E-Sign. Discovers integration points, maps APIs, migrates templates, rewrites code, and verifies the migration.

Installation

From Cowork

This repository is a plugin marketplace. To add it to Claude Cowork:

1. Open Claude Cowork
2. Go to Customize - in the left hand side nav bar
3. Click on Browse plugins
4. Click on the "Personal" tab
5. Click on the + button
6. Select Add marketplace from GitHub
7. Add this url as the source: anvilco/anvil-plugins
8. Install the Anvil document sdk plugin

From Claude Code Instance

/plugin marketplace add anvilco/anvil-plugins

then run

/plugin install <plugin-name>@anvil-plugins

or

/plugin install dropbox-anvil-migration@anvil-plugins

What's Inside

anvil-document-sdk

A guided implementation skill that walks developers through integrating Anvil's four core products:

• PDF Filling — Populate existing PDF templates with dynamic data via fillPDF
• HTML-to-PDF Generation — Create PDFs from HTML/CSS or structured Markdown via generatePDF
• Etch E-Sign — Send documents for electronic signature with embedded or email-based signing via createEtchPacket
• Workflows — Build multi-step document workflows with webforms and approvals via forgeSubmit

The skill includes:

• Quick Start flow for 5-minute setup verification
• Full discovery and implementation planning
• Reference files for each product with production-ready code patterns
• Bundled migration script for bulk PDF template uploads with AI-powered field detection
• Best practices for storage, webhooks, rate limiting, and security

dropbox-anvil-migration

A guided migration skill that walks developers through replacing DropboxSign (HelloSign) e-signature integrations with Anvil Etch E-Sign:

• Discovery — Scans for all DropboxSign/HelloSign SDK usage, API calls, env vars, webhooks, and database references
• API Mapping — Maps DropboxSign calls to Anvil equivalents with before/after code examples
• Template Migration — Downloads templates from DropboxSign, uploads to Anvil, generates DB migration scripts
• Code Rewriting — Replaces SDK calls, webhook handlers, embedded signing, and environment variables
• Verification — Guides end-to-end testing and cleanup of old dependencies

The skill includes:

• Complete API mapping reference (DropboxSign → Anvil)
• Feature parity analysis with workarounds for each gap
• Bundled template download script (standalone, no external deps)
• Template migration guide with database migration generation
• References the anvil-document-sdk skill for Anvil implementation patterns

Contributing

To add a new plugin to this marketplace:

1. Create a new directory at the root with your plugin name (kebab-case)
2. Add .claude-plugin/plugin.json with the plugin manifest
3. Add your skills, commands, or other components
4. Add an entry to .claude-plugin/marketplace.json

License

MIT