# Knowmint

> Knowledge marketplace where AI agents autonomously buy human expertise

- **Type:** MCP server
- **Install:** `agentstack add mcp-sou0327-knowmint`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [Sou0327](https://agentstack.voostack.com/s/sou0327)
- **Installs:** 0
- **Category:** [Databases](https://agentstack.voostack.com/c/databases)
- **Latest version:** 0.1.4
- **License:** MIT
- **Upstream author:** [Sou0327](https://github.com/Sou0327)
- **Source:** https://github.com/Sou0327/knowmint
- **Website:** https://knowmint.shop/

## Install

```sh
agentstack add mcp-sou0327-knowmint
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# KnowMint

[](LICENSE)
[](https://developers.cloudflare.com/workers/)

**The first knowledge marketplace where AI agents pay directly with SOL — autonomously.**

Humans list tacit knowledge, experiential insights, and battle-tested solutions. AI agents (Claude Code, ElizaOS, AgentKit) autonomously discover, evaluate, and purchase via the x402 protocol — paying sellers directly via non-custodial Solana P2P transfers. No private keys held by the platform.

> Human-in-the-loop mode also available: agent searches and proposes, you approve. Same marketplace, your choice of autonomy level.

Three access layers: **Web UI** / **CLI (`km`)** / **REST API + MCP Server**

### Web UI

### CLI / MCP (for AI Agents)

---

## Why KnowMint

- **First for agentic payments** — AI agents autonomously pay with SOL via x402 protocol. No human required to complete a purchase
- **x402 autonomous purchasing** — HTTP 402 + Solana P2P direct transfer. Agent finds, pays, and accesses knowledge end-to-end
- **Human-in-the-loop also available** — Agent proposes, you approve. Same marketplace, your choice of autonomy level
- **Human → AI knowledge supply** — Sell experiential and tacit knowledge that AI cannot self-generate
- **Non-custodial payments** — Buyer-to-seller P2P direct transfer on Solana (no platform custody)

---

## For AI Agents

### Getting an API Key

**For AI agents (wallet-based, no web UI needed):**

1. `POST /api/v1/auth/challenge` with `{ "wallet": "", "purpose": "register" }`
2. Sign the returned `message` with your Solana wallet
3. `POST /api/v1/auth/register` with `{ "wallet", "signature", "nonce" }`
4. Receive `{ "api_key": "km_...", "user_id", "wallet" }` — ready to use

**For humans (web UI):**

1. Sign up at [knowmint.shop](https://knowmint.shop) (or your self-hosted instance)
2. Go to **Profile → API Keys**
3. Create a key with `read` or `write` permission
4. Copy the key — it is shown only once

### MCP Server

Add to `~/.claude/mcp.json`:

```json
{
  "mcpServers": {
    "knowmint": {
      "command": "npx",
      "args": ["--yes", "--package", "@knowmint/mcp-server@0.1.2", "mcp-server"],
      "env": {
        "KM_BASE_URL": "https://knowmint.shop"
      }
    }
  }
}
```

> **No API key needed for initial setup.** The agent can self-register using `km_register`.

#### Self-Registration (No Prior Account Needed)

1. Prepare a Solana keypair file (e.g. `~/.config/solana/id.json`)
2. Call `km_register` with the keypair path — the tool handles challenge, signature, and registration automatically
3. The API key is saved to `~/.km/config.json` and used for all subsequent calls

```
km_register(keypair_path: "~/.config/solana/id.json")
  → POST /api/v1/auth/challenge (get nonce)
  → Sign message with keypair
  → POST /api/v1/auth/register (get API key)
  → Saved to ~/.km/config.json — ready to use
```

To re-login to an existing account: `km_wallet_login(keypair_path: "...")`.

#### Tool Reference

| Tool | Description |
|---|---|
| `km_register` | **Register a new account with a Solana keypair and get an API key** |
| `km_wallet_login` | **Re-login to an existing account and get a new API key** |
| `km_search` | Search knowledge |
| `km_get_detail` | Get knowledge details |
| `km_purchase` | Purchase knowledge (Solana transfer) |
| `km_get_content` | Get purchased content (x402 gate) |
| `km_get_version_history` | Get version history |
| `km_publish` | Publish knowledge |

#### x402 Autonomous Purchase Flow

```
km_get_content()
  → HTTP 402 (payment_required)
  → Solana transfer
  → Retry with payment_proof
  → Content returned
```

> **Security**: Do not place config files in public repos or synced directories. Rotate keys regularly.
> - Search & read only (`km_search` / `km_get_detail` / `km_get_content`) → `read` permission key
> - Purchase & publish (`km_purchase` / `km_publish`) → `write` permission key

### CLI (`km`)

Standalone Node.js CLI. Config stored in `~/.km/config.json`.

#### Self-Registration

```bash
# Register with an existing Solana keypair (creates account + saves API key)
km register --keypair ~/.config/solana/id.json

# Register with auto-generated keypair (new wallet created automatically)
km register

# Re-login to an existing account
km wallet-login --keypair ~/.config/solana/id.json
```

#### Usage

```bash
km login --base-url https://knowmint.shop   # Manual API key input (if already have one)
km search "prompt engineering"
km install  --tx-hash  --deploy-to claude
km publish prompt ./prompt.md --price 0.5SOL --tags "seo,marketing"
km my purchases
```

`--deploy-to claude,opencode` auto-deploys purchased knowledge to your tools.

See `cli/README.md` for full documentation.

---

## For Humans

The web UI features a retro RPG-style design (Dragon Quest inspired). Humans can:

- **List** knowledge with SOL pricing, previews, and tags
- **Browse** a marketplace of prompts, tool definitions, datasets, and APIs
- **Purchase** with Phantom or Solflare wallet
- **Track** sales, purchases, and feedback on a personal dashboard

---

## Quick Start

**Prerequisites**: Node.js 22.6+ / npm

```bash
git clone https://github.com/Sou0327/knowmint.git
cd knowmint
npm install

# Start local Supabase (applies migrations automatically)
npx supabase start

# Copy and fill environment variables
cp .env.local.example .env.local

# Start dev server
npm run dev   # http://localhost:3000
```

### Required Environment Variables

| Variable | Description |
|---|---|
| `NEXT_PUBLIC_SUPABASE_URL` | Supabase project URL |
| `NEXT_PUBLIC_SUPABASE_ANON_KEY` | Supabase anon key |
| `SUPABASE_SERVICE_ROLE_KEY` | Admin client (API routes) |

### Optional (Recommended for Production)

| Variable | Description |
|---|---|
| `NEXT_PUBLIC_SOLANA_RPC_URL` | Solana RPC URL |
| `NEXT_PUBLIC_SOLANA_NETWORK` | `devnet` (default) / `mainnet-beta` |
| `X402_NETWORK` | x402 payment network CAIP-2 identifier |
| `CRON_SECRET` | Cron job auth key |
| `UPSTASH_REDIS_REST_URL` | Rate limiting (Upstash Redis) |
| `UPSTASH_REDIS_REST_TOKEN` | Rate limiting token |
| `WEBHOOK_SIGNING_KEY` | Webhook signature verification |

---

## Agent Plugins

### Coinbase AgentKit (`packages/agentkit-plugin/`)

`ActionProvider` plugin for AgentKit agents.

```bash
cd packages/agentkit-plugin && npm install && npm run build
```

5 actions: `km_search` / `km_get_detail` / `km_purchase` / `km_get_content` / `km_publish`

### ElizaOS (`packages/eliza-plugin/`)

Plugin for the ElizaOS framework.

```bash
cd packages/eliza-plugin && npm install && npm run build
```

```typescript
import { knowmintPlugin } from "@knowmint/eliza-plugin";

const character = {
  plugins: [knowmintPlugin],
  settings: {
    KM_API_KEY: "km_xxx",
    KM_BASE_URL: "https://knowmint.shop", // optional
  },
};
```

Actions: `SEARCH_KNOWLEDGE` / `PURCHASE_KNOWLEDGE` / `GET_CONTENT`
Provider: `trending-knowledge` (top 5 injected into context)

---

## API Overview

Most endpoints are protected by `withApiAuth` (API key auth + rate limiting).
Full reference: `docs/openapi.yaml` / `docs/api-guidelines.md`

### Auth (No API Key Required)

| Method | Path | Description |
|---|---|---|
| POST | `/api/v1/auth/challenge` | Get a signing challenge (wallet + purpose) |
| POST | `/api/v1/auth/register` | Register with wallet signature → receive API key |
| POST | `/api/v1/auth/login` | Re-login with wallet signature → receive new API key |

### Knowledge

| Method | Path | Description |
|---|---|---|
| GET | `/api/v1/knowledge` | List knowledge |
| POST | `/api/v1/knowledge` | Create knowledge |
| POST | `/api/v1/knowledge/batch` | Batch get |
| GET | `/api/v1/knowledge/{id}` | Get details |
| PATCH | `/api/v1/knowledge/{id}` | Update |
| POST | `/api/v1/knowledge/{id}/publish` | Publish |
| POST | `/api/v1/knowledge/{id}/purchase` | Purchase (Solana TX verification) |
| GET | `/api/v1/knowledge/{id}/content` | Get content (x402 gate) |
| POST | `/api/v1/knowledge/{id}/feedback` | Submit feedback |

### User

| Method | Path | Description |
|---|---|---|
| GET | `/api/v1/me/purchases` | Purchase history |
| GET | `/api/v1/me/listings` | My listings |
| POST | `/api/v1/me/wallet/challenge` | SIWS challenge |
| POST | `/api/v1/me/wallet/verify` | Wallet verification |

---

## Tech Stack

| Layer | Technology |
|---|---|
| Frontend | Next.js 16 (App Router) + React 19, TypeScript, Tailwind CSS v4 |
| Backend / DB | Supabase (PostgreSQL, Auth, Storage, RLS) |
| Payments | Solana (non-custodial P2P, Anchor 0.32) |
| Rate Limiting | Upstash Redis |
| MCP | `@knowmint/mcp-server` (`@modelcontextprotocol/sdk`) |
| Deploy | Cloudflare Workers (opennextjs-cloudflare) |
| Testing | Mocha/Chai (unit/integration), Vitest (components) |

---

## Testing

```bash
# Unit tests (202 tests, Mocha/Chai)
npm run test:unit

# Component tests (Vitest)
npm run test:components

# Staging integration tests (requires supabase start)
npm run test:staging

# E2E tests
npm run test:e2e:fake-tx        # Fake transaction rejection
npm run test:e2e:cli-flow       # CLI flow (login/search/install/publish/deploy)
npm run test:e2e:cli-purchase   # CLI purchase flow
npm run test:e2e:x402-flow      # HTTP 402 payment gate
npm run test:e2e:devnet         # Devnet SOL transfer → purchase → content
```

For local devnet testing with a full purchase flow, see [Local Devnet Testing Guide](docs/local-devnet-guide.md).

---

## Deployment

Deployed to Cloudflare Workers via opennextjs-cloudflare.

```bash
npm run build:cf    # Build + strip @vercel/og WASM
npm run deploy:cf   # Deploy to production
```

**CI/CD** (`.github/workflows/deploy.yml`):
- Push to `main` → auto-deploy to production Worker
- PR created → auto-deploy to preview Worker
- PR closed → preview Worker deleted

---

## Contributing

1. Fork the repository
2. Create a feature branch (`git checkout -b feature/my-feature`)
3. Commit your changes
4. Push to the branch and open a Pull Request

---

## License

[MIT](LICENSE)

## Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [Sou0327](https://github.com/Sou0327)
- **Source:** [Sou0327/knowmint](https://github.com/Sou0327/knowmint)
- **License:** MIT
- **Homepage:** https://knowmint.shop/

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.4 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** yes
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.4** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/mcp-sou0327-knowmint
- Seller: https://agentstack.voostack.com/s/sou0327
- Browse the marketplace: https://agentstack.voostack.com/browse

---
Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.