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melis x402 Tools — 22 pay-per-call APIs for AI agents. No accounts, no API keys. USDC on Base.
melis x402 Tools — 22 pay-per-call APIs for AI agents. No accounts, no API keys. USDC on Base.
Valid MCP server (2 strong, 4 medium validity signals). No known CVEs in dependencies. Package registry verified. Imported from the Official MCP Registry. Trust signals: trusted author (4/4 approved).
3 files analyzed · 1 issue found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
This plugin requests these system permissions. Most are normal for its category.
Set these up before or after installing:
Environment variable: X402_PAYMENT_HEADER
Environment variable: X402_INTERNAL_KEY
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-mizukaizen-x402-tools-mcp": {
"env": {
"X402_INTERNAL_KEY": "your-x402-internal-key-here",
"X402_PAYMENT_HEADER": "your-x402-payment-header-here"
},
"args": [
"-y",
"@melis-ai/x402-tools-mcp"
],
"command": "npx"
}
}
}From the project's GitHub README.
Boring infrastructure for agent builders. 22 pay-per-call utility tools served as an MCP server — scrape, validate, embed, store, moderate, notify, convert, prevent loops. No accounts, no API keys, no subscriptions. Pay with USDC on Base via the x402 protocol.
npx @melis-ai/x402-tools-mcp
→ Full catalogue with prices and live examples: agents.melis.ai → Canonical 5-step RAG pipeline: agents.melis.ai/pipelines/rag → 5-minute getting started: agents.melis.ai/docs/getting-started
| Tool | Price (USDC) | Description |
|---|---|---|
list_services | free | Returns the full catalogue with prices and endpoint URLs |
cacheserve | $0.001 | Fetch a URL with server-side caching — avoids redundant origin hits |
docconvert_text | $0.001 | Format conversion: md↔html, json↔csv, html→txt, etc. |
intentflow | $0.001 | Context handoff relay for multi-agent delegation (async, returns retrieve_url) |
memoryserve_write | $0.001 | Store text + embedding in Qdrant + SQLite, namespaced per agent_id |
memoryserve_query | $0.001 | Recall most-similar memories by semantic query |
memscrub | $0.001 | Scan retrieved RAG content for indirect prompt injection (10 patterns) |
notifyrelay_webhook | $0.001 | POST a JSON payload to a URL with optional HMAC-SHA256 signing |
schemagate | $0.001 | Validate a JSON response against a JSON Schema, return a hint on failure |
loopwall_hop | $0.0005 | Validate one hop of a signed multi-agent chain (loop / budget enforcement) |
loopwall_issue | $0.001 | Issue a signed Job Envelope at chain start with budget + hop cap |
imageguard | $0.002 | NSFW image classification (multi-class moderation on roadmap) |
notifyrelay_telegram | $0.002 | Send a Telegram message to a known chat ID |
promptguard | $0.002 | Score untrusted input for prompt injection risk (0–100) |
structextract | $0.002 | Extract structured JSON from HTML — tables, links, emails, phones |
xaudit | $0.002 | Validate API response content with a cryptographically signed certificate |
docconvert_pdf | $0.005 | Convert HTML or markdown to PDF (base64 output) |
kyaoracle | $0.005 | On-chain trust score (0–100) for an Ethereum/Base wallet address |
linkrisk | $0.005 | URL risk profile — heuristic phishing signals, redirect tracing |
markdownopt | $0.005 | Convert URL or HTML to clean LLM-ready markdown (~70% token reduction) |
notifyrelay_email | $0.005 | Send a transactional email via Resend (allowlisted, rate-limited) |
embedpay | $0.00005 / 1k tokens | OpenAI text-embedding-3-small wrapper, batch tier available |
linksafe | $0.01 | Definitive URL safety check via Playwright sandbox + VirusTotal |
scrapepay | $0.01 | Web extraction via Playwright (robots.txt enforced, SSRF-safe) |
pdf_render | $0.49 | High-fidelity URL or HTML → PDF via Playwright |
22 services. Live prices and live wallet on Basescan.
Add to your claude_desktop_config.json:
{
"mcpServers": {
"x402-tools": {
"command": "npx",
"args": ["@melis-ai/x402-tools-mcp"]
}
}
}
macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Windows: %APPDATA%\Claude\claude_desktop_config.json
Restart Claude Desktop. All 22 tools appear in the tool picker.
See agents.melis.ai/docs/install-mcp for per-client setup.
// All 22 tools registered as MCP tools — your agent calls them like any function
const page = await callTool('scrapepay', { url: 'https://example.com/article' });
const md = await callTool('markdownopt', { html: page.content });
const vec = await callTool('embedpay', { input: md.markdown });
const stored = await callTool('memoryserve_write', {
agent_id: 'agent-1', content: md.markdown, vector: vec.embedding,
});
// Later — recall and guard against indirect injection
const hits = await callTool('memoryserve_query', {
agent_id: 'agent-1', query: 'what did we learn about X?',
});
for (const chunk of hits.matches) {
const scrub = await callTool('memscrub', { content: chunk.content });
if (scrub.risk_level === 'safe') useChunk(chunk);
}
Total cost per 5k-token page: ~$0.017 USDC. Detailed walkthrough: agents.melis.ai/pipelines/rag.
x402 settles in USDC on Base (Coinbase L2). Two paths:
$1.00 of USDC covers 100 ScrapePay calls, 200 PromptGuard calls, or one full RAG-pipeline ingestion run.
| URL | Purpose |
|---|---|
| agents.melis.ai/llms.txt | Concise LLM-readable catalogue |
| agents.melis.ai/llms-full.txt | Full schemas + composition recipes |
| agents.melis.ai/openapi.json | OpenAPI 3.1 spec for all 22 endpoints |
| agents.melis.ai/ai-plugin.json | ChatGPT-plugin manifest |
https://<service>.melis.ai/.well-known/mcp.json | Per-service MCP discovery |
| agents.melis.ai/agents-faq | Agent-builder FAQ (distinct from human FAQ) |
Found a vulnerability? See SECURITY.md. Email sean@melis.ai. Critical issues acknowledged within 24 hours.
If you use melis x402 Tools in research or downstream products, see CITATION.cff for the canonical citation.
Sean Melis — agent operator and builder, London UK. Catalogue: agents.melis.ai · Email: sean@melis.ai
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