SignNow Claude Code Plugin
A powerful plugin for integrating SignNow e-signature API with Claude Code, offering AI-driven development tools.
SignNow Claude Code Plugin
A comprehensive Claude Code plugin for building SignNow e-signature API integrations. Provides AI-powered documentation retrieval, multi-language code generation, signing workflow design, multi-tenant architecture guidance, billing/rebilling patterns, SDK maturity advisory, CRM/ERP integration patterns, and security-focused code review — all grounded in live SignNow API documentation via MCP tools.
Author: ShadowRock
What This Plugin Does
This plugin transforms Claude Code into a specialized SignNow integration development environment. It equips the AI assistant with deep knowledge of the SignNow e-signature platform through:
- 11 slash commands for common developer tasks (project scaffolding, API lookup, auth setup, workflow design, field configuration, embedded signing, branding, diagnostics, and more)
- 15 auto-activating skills that provide contextual SignNow expertise whenever relevant topics arise in conversation
- 2 specialized agents (Integration Architect and Code Reviewer) for in-depth architecture design and security-focused code review
- 5 MCP tools backed by SignNow's documentation service for real-time API reference, code examples, changelog tracking, and OpenAPI spec lookup
- Automated code linting hooks that enforce SignNow security best practices on every file write
Who This Is For
- Developers building SignNow API integrations in JavaScript, Python, PHP, C#, Java, or cURL
- Teams building commercial SaaS products that embed SignNow e-signatures (multi-tenant, billing, white-label)
- Developers creating CRM/ERP connectors that integrate SignNow with Salesforce, HubSpot, Pipedrive, or custom systems
- Anyone who wants AI-assisted, documentation-grounded guidance for SignNow's REST API, embedded signing, webhooks, templates, and more
Installation
Via plugin directory
claude --plugin-dir ./signnow-claude-plugin
Prerequisites
- Claude Code CLI
- uv (for
uvxto auto-fetch the MCP server)
The MCP server (sn-api-helper-mcp) is fetched automatically from PyPI via uvx on first use. No manual server installation required.
Commands
| Command | Usage | Description |
|---|---|---|
/signnow:setup | /signnow:setup [language] | Generate boilerplate for a new SignNow e-signature integration |
/signnow:scaffold | /signnow:scaffold [use-case] [language] | Use-case-driven project scaffolding (embedded-signing, connector, multi-tenant, kiosk, billing-integration) |
/signnow:api | /signnow:api [topic] | Look up SignNow API endpoint documentation |
/signnow:auth | /signnow:auth [language] | Guide through SignNow OAuth 2.0 setup, generate reusable auth module |
/signnow:workflow | /signnow:workflow [description] | Design a signing workflow with API call sequence |
/signnow:fields | /signnow:fields [description] | Design SignNow field configurations and generate placement code |
/signnow:embed | /signnow:embed [type] [language] | Set up embedded signing, embedded editor, or embedded sending |
/signnow:brand | /signnow:brand [language] | Configure SignNow white-label branding |
/signnow:samples | /signnow:samples [language or topic] | Browse SignNow sample apps, SDKs, and reference implementations |
/signnow:changelog | /signnow:changelog [since] | View SignNow API changelog and recent feature updates |
/signnow:diagnose | /signnow:diagnose | Scan current project for SignNow integration issues and deprecated patterns |
Examples
/signnow:setup python
/signnow:scaffold multi-tenant javascript
/signnow:scaffold connector php
/signnow:api upload document
/signnow:auth javascript
/signnow:workflow "NDA with two signers and a CC recipient"
/signnow:fields "contract with signature, date, and initials on each page"
/signnow:embed signing javascript
/signnow:brand php
/signnow:samples java
/signnow:changelog 2025-06-01
/signnow:diagnose
Skills
Skills activate automatically when the conversation touches relevant SignNow topics. No manual invocation needed — Claude detects context and applies the right skill.
| Skill | Auto-activates when discussing... |
|---|---|
signnow-api-guide | SignNow API endpoints, REST calls, integration patterns |
signnow-code-gen | Code generation for SignNow API operations (with SDK maturity gate) |
signnow-workflow-design | Signing workflows, signer roles, sequential/parallel signing |
signnow-auth-setup | SignNow OAuth 2.0 authentication, token management, credentials |
signnow-webhooks | Event-driven integrations, webhook callbacks, event chaining, saga patterns |
signnow-fields | SignNow document fields — signature, text, checkbox, date, initials, dropdown |
signnow-embedded-signing | Embedded signing via iframe, kiosk mode, approval workflows, payment requests |
signnow-embedded-editor | Embedded document editor within host applications |
signnow-embedded-sending | Embedded invite-sending UI for end-user-driven signature requests |
signnow-branding | White-label branding, custom logos, colors, email templates |
signnow-sample-apps | SignNow sample apps, official SDKs, starter projects (with SDK status matrix) |
signnow-sdk-advisor | SDK maturity assessment, SDK vs direct API decisions, Python SDK stale warning |
signnow-multi-tenant | Multi-tenant platforms, SignNow Organizations API, tenant isolation, per-tenant branding |
signnow-integration-patterns | CRM/ERP connectors (Salesforce, HubSpot, Pipedrive), variable mapping, document writeback |
signnow-billing-patterns | Billing/rebilling architecture, Stripe integration, metered billing, usage tracking |
Agents
| Agent | Purpose |
|---|---|
| Integration Architect | Analyzes requirements and designs end-to-end SignNow signing architectures — including multi-tenant (Organizations API), billing (Stripe), compliance (HIPAA, SOC 2, GDPR), and SDK selection |
| Code Reviewer | Security-focused review of SignNow integration code — checks API correctness, credential handling, webhook validation, tenant isolation, billing idempotency, and SDK version currency |
MCP Tools
The plugin is backed by 5 MCP tools that query SignNow's documentation service in real time:
| Tool | Description |
|---|---|
get_signnow_api_info | General SignNow API documentation search |
search_signnow_api_reference | Category-filtered API reference (authentication, documents, invites, templates, webhooks, fields, groups, folders, users, organizations, embedded, branding) |
get_signnow_code_example | Code examples for SignNow API operations with optional language filtering |
get_signnow_changelog | SignNow API changelog and release notes with optional date filtering |
get_signnow_openapi_spec | SignNow OpenAPI specification lookup — endpoint definitions, schemas, parameters |
Hooks
Automated hooks enforce SignNow security best practices on every code write:
| Hook | Event | Checks |
|---|---|---|
| MCP server check | SessionStart | Verifies uvx and the MCP server are available |
| Code linting | PostToolUse (Write/Edit) | Hardcoded credentials, HTTP URLs, missing error handling, missing rate limit/retry logic, production URL without sandbox support |
Architecture
signnow-claude-plugin/ Published by ShadowRock
├── .claude-plugin/plugin.json Plugin manifest (v0.2.0)
├── .mcp.json MCP server binding (auto-fetches via uvx)
├── commands/ 11 user-invocable slash commands
├── skills/ 15 model-invokable context skills
├── agents/ 2 specialized agent personas
├── hooks/ Session lifecycle + code quality hooks
└── scripts/ MCP check + lint scripts
sn-api-helper-mcp MCP Server (PyPI)
├── get_signnow_api_info General documentation search
├── search_signnow_api_reference Category-filtered API reference search
├── get_signnow_code_example Code example retrieval
├── get_signnow_changelog Changelog and release notes
└── get_signnow_openapi_spec OpenAPI specification lookup
The plugin wraps the sn-api-helper-mcp MCP server with Claude Code-specific UX. The MCP server provides the tools; the plugin provides skills, commands, and agents that use those tools.
SignNow SDK Status
Not all SignNow SDKs are equally maintained. The plugin includes an SDK maturity gate that automatically adjusts code generation recommendations:
| Language | SDK | Status | Plugin Behavior |
|---|---|---|---|
| PHP | signnow/SignNowPHPSDK | Active | Prefers SDK |
| Node.js | signnow/SignNowNodeSDK | Moderate | SDK for core ops, direct API for newer features |
| Java | signnow/SignNowJavaAPiClient | Moderate | SDK for core ops, direct API for newer features |
| C#/.NET | signnow/SignNow.NET | Moderate | SDK for core ops, direct API for newer features |
| Python | Legacy SDK | Stale | Always generates direct requests/httpx code |
See the signnow-sdk-advisor skill for detailed guidance.
Sample Apps & Resources
| Resource | Link |
|---|---|
| Sample App (PHP/Laravel) | github.com/signnow/sample-app |
| PHP SDK | github.com/signnow/SignNowPHPSDK |
| Node.js SDK | github.com/signnow/SignNowNodeSDK |
| Java SDK | github.com/signnow/SignNowJavaAPiClient |
| C# SDK | github.com/signnow/SignNow.NET |
| Postman Collection | signnow-api/signnow-public-collection |
Supported Languages
Code generation supports: JavaScript/Node.js, Python, C#/.NET, PHP, Java, and cURL.
SignNow API Environments
| Environment | Base URL |
|---|---|
| Sandbox | https://api-eval.signnow.com |
| Production | https://api.signnow.com |
All generated code defaults to the sandbox environment. Switch to production by changing the SIGNNOW_API_BASE_URL environment variable.
Key SignNow Documentation
- SignNow API Documentation
- Full API Reference
- Embedded Signing Guide
- Embedded Editor Guide
- Embedded Sending Guide
- Branding Guide
- Developer Portal
License
MIT License. See LICENSE.md.
Published by ShadowRock. The MCP server component (sn-api-plugin) is a fork of signnow/sn-api-helper-mcp.