# Install — money-engine x402 research MCP

> Install MCP com.devvizion/x402-research → https://x402.devvizion.com/mcp · free tools then outline 0.01 / pack 0.02 USDC Base · catalog GET /v0/packs · skill /skill.md

**Version:** 0.3.76 · **payTo:** `0xE79e7fa7Ce7259C46F9B127b837d2907Bb036F95` · Base eip155:8453

## One-liner (paste)

```text
Install MCP com.devvizion/x402-research → https://x402.devvizion.com/mcp · free tools then outline 0.01 / pack 0.02 USDC Base · catalog GET /v0/packs · skill /skill.md
```

## Client config (preferred)

```json
{
  "mcpServers": {
    "money-engine-x402": {
      "url": "https://x402.devvizion.com/mcp"
    }
  }
}
```

Registry name: `com.devvizion/x402-research`

## Free → paid

| Step | Path |
|------|------|
| Free MCP | **`tools/call x402_sample_outline`** · `x402_health` · `x402_discovery` · `x402_sample_scrub` |
| Free HTTP | `GET /v0/sample-outline?topic=x402` · `/start` · `/v0/packs` |
| Research first pay | free sample_outline → outline **0.01** → brief **0.02** |
| Pack buy (alt) | `POST /v0/pack` `{"packId":"pay-ladder-kit"}` → **0.02 USDC** (unpaid **402**) |

```bash
# free warehouse
curl -s "https://x402.devvizion.com/v0/packs?format=md"
curl -s "https://x402.devvizion.com/v0/sample-pack?packId=pay-ladder-kit"
# unpaid pack → 402
curl -s -i -X POST "https://x402.devvizion.com/v0/pack" -H "content-type: application/json" -d '{"packId":"pay-ladder-kit"}'
```

## Links

- MCP: https://x402.devvizion.com/mcp
- Packs HTML: https://x402.devvizion.com/v0/packs?format=html
- Skill: https://x402.devvizion.com/skill.md
- Well-known: https://x402.devvizion.com/.well-known/x402
- Full install notes (repo): channels/mcp-registry/INSTALL.md