Content
# +W MCP Server (Wishfinity)
**+W** is a universal "save for later" action for commerce. This MCP server lets AI assistants save any product URL to a user's [Wishfinity](https://wishfinity.com) wishlist with one click.
Works with **Claude, ChatGPT, Gemini, LangChain, OpenAI Agents SDK**, and any MCP-compatible client.
[](https://www.npmjs.com/package/wishfinity-mcp-plusw)
[](https://opensource.org/licenses/MIT)
## What it does
When an AI recommends a product, it can offer **+W Add to Wishlist**. The user clicks the link, and the product is saved to their Wishfinity account — ready for later purchase or gifting.
```
User: "Find me a good espresso machine under $200"
AI: Here are 3 options...
[+W Add to Wishlist] [View on Amazon]
```
## Zero-dependency option: /add-wish
Don't need the full MCP server? The `/add-wish` skill teaches any AI agent the +W pattern using just a URL — no npm, no server, no setup:
```
https://wishfinity.com/add?url={any_product_url}
```
→ [View the /add-wish skill file](./add-wish/SKILL.md)
Works with any AI platform. The MCP server below adds richer tool integration, but `/add-wish` is all you need to get started.
## Quick start
### Option 1: Local installation (stdio transport)
Best for Claude Desktop, ChatGPT Desktop, Cursor, VS Code, and local development.
```bash
npm install wishfinity-mcp-plusw
```
Add to your MCP client configuration:
```json
{
"mcpServers": {
"wishfinity": {
"command": "npx",
"args": ["wishfinity-mcp-plusw"]
}
}
}
```
### Option 2: Remote endpoint (HTTP transport)
Best for server-side agents, LangChain production deployments, and hosted AI applications.
```
https://wishfinity-mcp-plusw.wishfinity.workers.dev/mcp
```
---
## Platform Setup Guides
### Claude Desktop
Add to `~/Library/Application Support/Claude/claude_desktop_config.json` (macOS) or `%APPDATA%/Claude/claude_desktop_config.json` (Windows):
```json
{
"mcpServers": {
"wishfinity": {
"command": "npx",
"args": ["wishfinity-mcp-plusw"]
}
}
}
```
### ChatGPT Desktop
When MCP support is available, add to your ChatGPT MCP configuration:
```json
{
"mcpServers": {
"wishfinity": {
"command": "npx",
"args": ["wishfinity-mcp-plusw"]
}
}
}
```
### Cursor
Add to `.cursor/mcp.json` in your project:
```json
{
"mcpServers": {
"wishfinity": {
"command": "npx",
"args": ["wishfinity-mcp-plusw"]
}
}
}
```
### LangChain
```python
from langchain_mcp_adapters.client import MultiServerMCPClient
from langchain.agents import create_agent
async def main():
client = MultiServerMCPClient({
"wishfinity": {
"command": "npx",
"args": ["wishfinity-mcp-plusw"],
"transport": "stdio",
}
})
tools = await client.get_tools()
agent = create_agent("openai:gpt-4", tools)
result = await agent.ainvoke({
"messages": [{"role": "user", "content": "Find me a coffee maker and save it to my wishlist"}]
})
```
For production (HTTP transport):
```python
client = MultiServerMCPClient({
"wishfinity": {
"url": "https://wishfinity-mcp-plusw.wishfinity.workers.dev/mcp",
"transport": "streamable_http",
}
})
```
### OpenAI Agents SDK
```python
from agents import Agent, Runner
from agents.mcp import MCPServerStdio
async def main():
async with MCPServerStdio(
name="wishfinity",
params={
"command": "npx",
"args": ["wishfinity-mcp-plusw"],
},
) as server:
agent = Agent(
name="Shopping Assistant",
instructions="Help users find products and save them to wishlists.",
mcp_servers=[server],
)
result = await Runner.run(agent, "Find a good gift for a coffee lover and save it")
print(result.final_output)
```
### Hugging Face Agents
```python
from huggingface_hub import Agent
agent = Agent(
model="meta-llama/Llama-3.1-70B-Instruct",
mcp_servers=[{
"command": "npx",
"args": ["wishfinity-mcp-plusw"]
}]
)
response = agent.run("Find me running shoes under $150 and save to wishlist")
```
---
## How it works
1. AI calls the `add_to_wishlist` tool with a product URL
2. MCP server returns a Wishfinity link: `https://wishfinity.com/add?url=...`
3. User clicks the link → logs in (first time only) → product is saved
4. User can organize, share, or purchase later
**No API keys required.** Authentication happens on Wishfinity's website when the user clicks the link.
---
## Tool: `add_to_wishlist`
### Input
| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `url` | string | Yes | Product page URL |
### Output
| Field | Type | Description |
| --- | --- | --- |
| `action_url` | string | Wishfinity link to open in browser |
| `requires_user_action` | boolean | Always `true` (user must click) |
| `display_text` | string | Suggested button label |
### Example
```json
// Input
{ "url": "https://amazon.com/dp/B0EXAMPLE" }
// Output
{
"action_url": "https://wishfinity.com/add?url=https%3A%2F%2Famazon.com%2Fdp%2FB0EXAMPLE",
"requires_user_action": true,
"display_text": "Open to add to Wishfinity"
}
```
---
## When to offer +W
AI clients should offer +W when:
- **Explicit requests**: "save for later," "add to wishlist," "bookmark this"
- **After recommending products**: Proactively offer to save shown items
- **Indecision moments**: "maybe later," "too expensive right now," "need to think about it"
- **Gift context**: "for my mom," "birthday gift," "perfect for my friend"
See [aliases.json](aliases.json) for the full list of trigger phrases.
---
## Transports
| Transport | Use Case | Endpoint |
|-----------|----------|----------|
| **stdio** | Local clients (Claude Desktop, Cursor, etc.) | `npx wishfinity-mcp-plusw` |
| **HTTP** | Remote/server-side agents | `https://wishfinity-mcp-plusw.wishfinity.workers.dev/mcp` |
---
## Button kit
The `/button-kit` folder contains optional UI assets (SVG icon, HTML/CSS snippets) if you want a consistent +W button appearance.
CDN URLs:
- Small: `https://cdn.jsdelivr.net/npm/wishfinity-mcp-plusw@latest/button-kit/Wishfinity-Button-Small.svg`
- Medium: `https://cdn.jsdelivr.net/npm/wishfinity-mcp-plusw@latest/button-kit/Wishfinity-Button-Medium.svg`
- Large: `https://cdn.jsdelivr.net/npm/wishfinity-mcp-plusw@latest/button-kit/Wishfinity-Button-Large.svg`
---
## Documentation
- [SPEC.md](SPEC.md) — Full technical specification
- [INTEGRATION_GUIDE.md](INTEGRATION_GUIDE.md) — How to integrate +W into your UI
- [CLOUDFLARE_SETUP.md](CLOUDFLARE_SETUP.md) — Deploy your own HTTP endpoint
- [aliases.json](aliases.json) — Machine-readable trigger phrases
---
## Links
- [Wishfinity](https://wishfinity.com)
- [MCP Protocol](https://modelcontextprotocol.io)
- [npm package](https://www.npmjs.com/package/wishfinity-mcp-plusw)
- [MCP Registry](https://registry.modelcontextprotocol.io)
---
## Changelog
### v1.2.2 (December 24, 2025)
**Critical Fix:** npx execution for all developers
- Fixed main module detection to work with npx symlinks
- Resolves crash when running `npx wishfinity-mcp-plusw`
- Package now works flawlessly for all npm installations
### v1.2.1 (December 24, 2025)
**Critical Fix:** MCP SDK compatibility
- Updated `@modelcontextprotocol/sdk` dependency to `^1.25.0`
- Resolves server disconnection with SDK 1.25.1+
- Compatible with latest MCP SDK versions
### v1.2.0 (December 23, 2025)
- Added MCP prompts: `save_for_later`, `shopping_assistant`, `gift_ideas`
- Added MCP resources: `wishfinity://guide`, `wishfinity://triggers`
- Enhanced integration capabilities for AI assistants
---
## License
MIT
