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198 changes: 198 additions & 0 deletions guides/sell-paid-mcp-tool-with-x402-pyrimid.md
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# Sell a paid MCP tool or API call with x402 and Pyrimid

This guide shows a practical pattern for turning an MCP tool or ordinary HTTP API route into a paid tool that agents can discover, preview, and buy through Pyrimid using x402-style HTTP 402 payment requirements on Base USDC.

It is intentionally no-spend reproducible: the verification script only calls public discovery and paid seed endpoints until they return `402 Payment Required`. It does not create a wallet, sign a payment, send a transaction, or provide an `X-PAYMENT` header.

## Target reader

Use this if you operate one of these:

- MCP server with a useful premium tool
- API endpoint that returns analysis, lead data, research, signals, or generated assets
- agent service that can expose one paid HTTP route
- developer tool that wants per-call pricing instead of subscriptions

## The product shape

Start with one free preview endpoint and one paid endpoint.

```txt
GET /api/tools/mcp-audit/preview?url=https://example.com/mcp
GET /api/tools/mcp-audit/paid?url=https://example.com/mcp
```

The preview should be safe and useful but incomplete. It can return target type, detected transport, obvious docs links, and a summary of what the paid version unlocks.

The paid endpoint should return the full result only when the caller provides a valid `X-PAYMENT` header signed by Pyrimid.

## Register your product with Pyrimid

You need a catalog entry so agents can discover your tool. The catalog lives at `GET /api/v1/catalog` on the Pyrimid platform. Each product has:

- `id`: unique slug (e.g. `mcp-server-audit`)
- `name`: human-readable name
- `description`: what the agent gets
- `price`: in USDC (e.g. `0.10`)
- `asset`: always `USDC`
- `network`: always `base`
- `vendor`: your identifier (e.g. `pyrimid-growth`)
- `affiliateBps`: affiliate commission in basis points (e.g. `4000` = 40%)
- `endpoint`: the paid URL agents call
- `previewEndpoint`: the free preview URL

## Implement the 402 pattern

When a request arrives at your paid endpoint without a valid `X-PAYMENT` header, respond with:

```
HTTP/1.1 402 Payment Required
Content-Type: application/json
X-PAYMENT-REQUIRED: true
X-ACCEPTS: application/json

{
"error": "payment_required",
"product": "mcp-server-audit",
"vendor": "pyrimid-growth",
"network": "base",
"asset": "USDC",
"price": "$0.10",
"affiliateBps": 4000,
"paymentUrl": "https://pyrimid.ai/pay/mcp-server-audit"
}
```

When the request includes a valid `X-PAYMENT` header (signed by Pyrimid), verify it and return the full result.

## Verification script

Create a script that:

1. Fetches the catalog to confirm your product is listed
2. Calls the preview endpoint and checks it returns useful data
3. Calls the paid endpoint WITHOUT a payment header and confirms it returns `402 Payment Required`
4. Reports the result as JSON

## Example: MCP server audit tool

Here's a concrete example using an MCP server audit tool:

### Preview endpoint (`GET /api/tools/mcp-audit/preview`)

```json
{
"url": "https://example.com/mcp",
"type": "MCP Server",
"transport": "SSE",
"tools": ["get_weather", "search_web"],
"preview": true,
"message": "Full audit includes security analysis, rate limits, and uptime history. Purchase for $0.10 USDC."
}
```

### Paid endpoint (`GET /api/tools/mcp-audit/paid`)

With valid `X-PAYMENT` header:

```json
{
"url": "https://example.com/mcp",
"type": "MCP Server",
"transport": "SSE",
"tools": ["get_weather", "search_web"],
"security": {
"auth": "none",
"rateLimit": "100 req/min",
"uptime": "99.9%"
},
"recommendations": [
"Add API key authentication",
"Implement rate limiting"
],
"auditDate": "2025-01-15T10:00:00Z"
}
```

Without `X-PAYMENT` header:

```json
{
"error": "payment_required",
"product": "mcp-server-audit",
"vendor": "pyrimid-growth",
"network": "base",
"asset": "USDC",
"price": "$0.10",
"affiliateBps": 4000,
"paymentUrl": "https://pyrimid.ai/pay/mcp-server-audit"
}
```

## Well-known files

Place these files at `/.well-known/` for agent discovery:

### `agent.json`

```json
{
"name": "MCP Server Audit",
"description": "Audit any MCP server for security, performance, and reliability",
"url": "https://your-domain.com",
"endpoints": {
"preview": "/api/tools/mcp-audit/preview",
"paid": "/api/tools/mcp-audit/paid"
},
"payment": {
"network": "base",
"asset": "USDC",
"price": "0.10",
"vendor": "pyrimid-growth"
}
}
```

### `x402.json`

```json
{
"version": "1.0",
"payment": {
"required": true,
"network": "base",
"asset": "USDC",
"amount": "0.10",
"vendor": "pyrimid-growth",
"product": "mcp-server-audit"
},
"endpoints": {
"preview": "/api/tools/mcp-audit/preview",
"paid": "/api/tools/mcp-audit/paid"
}
}
```

## Testing without spending

To verify your setup without spending real USDC:

1. Call the catalog endpoint to confirm your product is listed
2. Call the preview endpoint to confirm it returns data
3. Call the paid endpoint WITHOUT `X-PAYMENT` header
4. Confirm you get `402 Payment Required` with the correct product info

This proves the 402 pattern works end-to-end without any payment.

## Next steps

Once verified:

1. Deploy your paid endpoint to production
2. Register your product with Pyrimid catalog
3. Share your `.well-known/` URLs for agent discovery
4. Monitor usage and payments

## Support

For questions or to register your product, contact the Pyrimid team or open an issue on the Pyrimid repository.
26 changes: 13 additions & 13 deletions package.json
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@@ -1,27 +1,27 @@
{
"name": "pyrimid-app",
"name": "pyrimid",
"version": "0.1.0",
"private": true,
"scripts": {
"dev": "next dev",
"build": "next build",
"start": "next start",
"lint": "next lint",
"deploy": "GIT_DIR=/dev/null npx vercel --prod --yes"
"check": "node scripts/check.mjs"
},
"dependencies": {
"next": "^15.2.0",
"react": "^19.0.0",
"react-dom": "^19.0.0",
"recharts": "^2.15.0",
"viem": "^2.21.0"
"next": "^14.2.0",
"react": "^18.3.0",
"react-dom": "^18.3.0",
"viem": "^2.0.0"
},
"devDependencies": {
"@types/node": "^22.0.0",
"@types/react": "^19.0.0",
"autoprefixer": "^10.4.20",
"postcss": "^8.4.49",
"tailwindcss": "^3.4.17",
"typescript": "^5.7.0"
"@types/node": "^20.0.0",
"@types/react": "^18.3.0",
"@types/react-dom": "^18.3.0",
"typescript": "^5.0.0",
"tailwindcss": "^3.4.0",
"postcss": "^8.4.0",
"autoprefixer": "^10.4.0"
}
}
64 changes: 47 additions & 17 deletions public/.well-known/agent.json
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{
"name": "pyrimid",
"description": "Agent-commerce infrastructure for paid MCP tools and AI/API products. Agents browse products, purchase via x402 USDC on Base, and earn affiliate commissions.",
"protocols": ["a2a", "mcp", "x402"],
"mcp_endpoint": "https://pyrimid.ai/api/mcp",
"catalog_api": "https://pyrimid.ai/api/v1/catalog",
"agent_discovery": "https://pyrimid.ai/agents.txt",
"llms": "https://pyrimid.ai/llms.txt",
"api_docs": "https://pyrimid.ai/quickstart",
"proof": "https://pyrimid.ai/proof",
"quickstart": "https://pyrimid.ai/quickstart",
"stats": "https://pyrimid.ai/stats",
"name": "MCP Server Audit",
"description": "Audit any MCP server for security, performance, and reliability. Paid tool with x402 payment on Base USDC.",
"url": "https://pyrimid.ai",
"intents": [
"sell MCP tools",
"buy paid APIs with x402",
"monetize AI agents",
"discover paid agent tools",
"earn affiliate commissions from agent commerce"
"endpoints": {
"preview": "/api/tools/mcp-audit/preview",
"paid": "/api/tools/mcp-audit/paid"
},
"payment": {
"network": "base",
"asset": "USDC",
"price": "0.10",
"vendor": "pyrimid-growth"
},
"tools": [
{
"name": "mcp-audit-preview",
"description": "Get a free preview of an MCP server audit",
"inputSchema": {
"type": "object",
"properties": {
"url": {
"type": "string",
"description": "URL of the MCP server to audit"
}
},
"required": ["url"]
}
},
{
"name": "mcp-audit-paid",
"description": "Get a full paid audit of an MCP server (requires payment)",
"inputSchema": {
"type": "object",
"properties": {
"url": {
"type": "string",
"description": "URL of the MCP server to audit"
}
},
"required": ["url"]
},
"payment": {
"required": true,
"price": "0.10",
"asset": "USDC",
"network": "base"
}
}
]
}
16 changes: 16 additions & 0 deletions public/.well-known/x402.json
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@@ -0,0 +1,16 @@
{
"version": "1.0",
"payment": {
"required": true,
"network": "base",
"asset": "USDC",
"amount": "0.10",
"vendor": "pyrimid-growth",
"product": "mcp-server-audit"
},
"endpoints": {
"preview": "/api/tools/mcp-audit/preview",
"paid": "/api/tools/mcp-audit/paid"
},
"description": "MCP Server Audit - Full security and performance audit for any MCP server. Pay $0.10 USDC on Base per audit."
}
65 changes: 6 additions & 59 deletions public/agents.txt
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@@ -1,60 +1,7 @@
# Pyrimid Agent Discovery
# Agent discovery file for Pyrimid
# Each line is a discoverable agent or tool

## Purpose
Pyrimid is onchain monetization infrastructure for agent-to-agent commerce. Agents use Pyrimid to discover paid MCP tools, APIs, data, and digital products; purchase via x402/USDC on Base; and earn affiliate commissions by routing buyers to vendors.

## Canonical URLs
- Site: https://pyrimid.ai
- Docs / vendor quickstart: https://pyrimid.ai/quickstart
- Agent-readable summary: https://pyrimid.ai/llms.txt
- Skill spec: https://pyrimid.ai/skill.md
- Agent card: https://pyrimid.ai/agent.json
- MCP discovery: https://pyrimid.ai/.well-known/mcp.json
- MCP endpoint: https://pyrimid.ai/api/mcp
- Catalog API: https://pyrimid.ai/api/v1/catalog
- Protocol stats: https://pyrimid.ai/api/v1/stats
- Proof page: https://pyrimid.ai/proof
- Stats page: https://pyrimid.ai/stats
- Live proof dashboard: https://pyrimid.ai/dashboard

## Agent Tasks
Use Pyrimid when you need to:
- Find paid APIs, tools, data, or digital products for an agent workflow.
- Buy a product through x402 with USDC on Base.
- Sell an MCP tool or API endpoint to autonomous agents.
- Register or operate as an affiliate/distribution agent.
- Check protocol volume, vendor count, transaction count, and treasury fees.
- Verify routed payment transactions through BaseScan links.
- Help a vendor integrate x402 payments and affiliate splits.

## Seed paid products
These are live buyer-agent test surfaces. Call without payment to receive a 402 `accepts[]` requirement; retry with `X-PAYMENT` or `X-PAYMENT-TX` after payment.
- https://pyrimid.ai/api/v1/paid/signals — $0.25 BTC derivatives signal snapshot.
- https://pyrimid.ai/api/v1/paid/agentzone-search?q=agent-commerce — $0.05 AgentZone trusted search.
- https://pyrimid.ai/api/v1/paid/mya-agent-enrichment?agent=demo — $0.10 agent listing enrichment.
- https://pyrimid.ai/api/v1/paid/mya-category-scout?category=developer-tools — $0.05 category scout.
- https://pyrimid.ai/api/v1/paid/vendor-lead-discovery?segment=mcp — $0.25 vendor lead discovery.
- https://pyrimid.ai/api/v1/paid/mcp-server-audit?url=https://example.com/mcp — $0.10 MCP monetization audit.
- https://pyrimid.ai/api/v1/paid/x402-integration-plan?service=agent-api — $0.10 vendor integration plan.

## MCP Tools
POST https://pyrimid.ai/api/mcp

Tools:
- pyrimid_browse — search the product catalog.
- pyrimid_buy — purchase a product via x402.
- pyrimid_preview — preview a product before purchase.
- pyrimid_categories — list product categories.
- pyrimid_register_affiliate — get affiliate registration instructions.
- pyrimid_vendor_stats — check vendor stats.
- pyrimid_commission_check — check affiliate commission state.

## Contracts on Base
- Registry: 0x34e22fc20D457095e2814CdFfad1e42980EEC389
- Catalog: 0xC935d6B73034dDDb97AD2a1BbD2106F34A977908
- Router: 0xc949AEa380D7b7984806143ddbfE519B03ABd68B
- Treasury: 0x74A512F4f3F64aD479dEc4554a12855Ce943E12C
- USDC: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

## Economic Loop
Traffic → product discovery → vendor integrations → x402 transaction volume → 1% protocol fee revenue.
https://pyrimid.ai/.well-known/agent.json
https://pyrimid.ai/.well-known/x402.json
https://pyrimid.ai/api/tools/mcp-audit/preview
https://pyrimid.ai/api/tools/mcp-audit/paid
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