# io.github.Jannis-E/x402-mcp-server (npm · x402-mcp-server_by_milza)

Pay-per-call x402 tools on Base: web extract/render, burn-once secret vault, chart, GeoTIFF

- Trust score: 70/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-25

## Components

- npm · `x402-mcp-server_by_milza`: 70/100 (this document), [markdown](https://verifymcp.io/servers/jannis-e-x402-mcp-server/x402-mcp-server-by-milza.md), [page](https://verifymcp.io/servers/jannis-e-x402-mcp-server/x402-mcp-server-by-milza)

## Channel facts

- Registry: `npm`
- Package: `x402-mcp-server_by_milza`
- Version: `1.0.5`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-25.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 31 of 110 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 1 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 67/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 634 tokens (~126/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 13/100
  - Stability observed for 4 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the io.github.Jannis-E/x402-mcp-server server?

io.github.Jannis-E/x402-mcp-server runs locally as an npm package, launched with npx -y x402-mcp-server_by_milza. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add jannis-e-x402-mcp-server -- npx -y x402-mcp-server_by_milza
```

### Cursor

```json
{
  "mcpServers": {
    "jannis-e-x402-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "x402-mcp-server_by_milza"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "jannis-e-x402-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "x402-mcp-server_by_milza"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add jannis-e-x402-mcp-server -- npx -y x402-mcp-server_by_milza
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "jannis-e-x402-mcp-server": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "x402-mcp-server_by_milza"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add jannis-e-x402-mcp-server --command npx --arg -y --arg x402-mcp-server_by_milza
```

### Hermes

```yaml
mcp_servers:
  jannis-e-x402-mcp-server:
    command: "npx"
    args: ["-y", "x402-mcp-server_by_milza"]
```

### Netclaw

```json
{
  "McpServers": {
    "jannis-e-x402-mcp-server": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "x402-mcp-server_by_milza"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add jannis-e-x402-mcp-server -t stdio -c npx -a -y x402-mcp-server_by_milza
```

### Other

```json
{
  "mcpServers": {
    "jannis-e-x402-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "x402-mcp-server_by_milza"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-25 (score 70, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-24 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-23 (score 69, +1)

- [security regression] Tool safety: pass → unverified
- [security] Stability: Stability not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet.
- [functional regression] Capabilities: pass → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional improvement] Stability: unverified → 0.07
- [functional] First check of Schema quality: unverified
- [functional] Package version: 1.0.4 → 1.0.5

### 2026-09-21 (score 68)

First indexed and scored.

## MCP tools (5)

### `markdown-extractor` (~107 tokens)

Fetches a public URL and returns clean, token-efficient markdown, paywalled with the x402 v2 protocol on Base Mainnet. Designed for autonomous AI agents to call directly: no API key, no signup — pay per call in USDC. Costs 0.01 USDC per call on eip155:8453, paid automatically from BASE_PRIVATE_KEY. Request body fields are tool-specific -- see https://markdown-extractor.jannioura.workers.dev/openapi.json.

### `spa-dom-to-md` (~107 tokens)

Renders JavaScript-heavy SPA pages in real headless Chromium via Cloudflare Browser Rendering, waits for network-idle / selector-ready, strips nav/footer/script chrome, and serializes the fully-rendered DOM into clean, LLM-ready Markdown. Costs 0.03 USDC per call on eip155:8453, paid automatically from BASE_PRIVATE_KEY. Request body fields are tool-specific -- see https://spa-dom-to-md.jannioura.workers.dev/openapi.json.

### `burn-once-secret-vault` (~147 tokens)

Store a secret (API key, webhook payload, signed URL) encrypted with WebCrypto AES-256-GCM and share a claim URL that yields the secret exactly once. A Durable Object serializes reads so single-use delivery is race-free, and every burn returns an Ed25519-signed attestation. Creating a vault requires x402 payment; the recipient's claim read (GET /v/:vault_id) is free. Costs 0.01 USDC per call on eip155:8453, paid automatically from BASE_PRIVATE_KEY. Request body fields are tool-specific -- see https://burn-once-secret-vault.jannioura.workers.dev/openapi.json.

### `svg-bar-chart-renderer` (~127 tokens)

Deterministic, paid-per-render SVG bar chart generator for LLM agents. Accepts labeled scalar data and layout options, performs exact geometry math (min/max normalization, nice-interval y-axis ticks, label spacing, bar-width distribution), and returns schema-valid, escape-correct SVG with identical input always yielding byte-identical output. Costs 0.015 USDC per call on eip155:8453, paid automatically from BASE_PRIVATE_KEY. Request body fields are tool-specific -- see https://svg-bar-chart-renderer.jannioura.workers.dev/openapi.json.

### `wasm-geotiff-transcoder` (~146 tokens)

Decodes a GeoTIFF/COG raster (fetch by https URL or inline base64), reads the selected RGB bands via windowed overview-level reads, applies a tone-map stretch, and returns a render-ready PNG/WebP plus structured georeference metadata (CRS, bounds, pixel scale) and source stats. Sources are hard-capped at 20 MB and output width at 2048 px. Costs 0.03 USDC per call on eip155:8453, paid automatically from BASE_PRIVATE_KEY. Request body fields are tool-specific -- see https://wasm-geotiff-transcoder.jannioura.workers.dev/openapi.json.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/jannis-e-x402-mcp-server/x402-mcp-server-by-milza#diagnostics

## Score history

- 2026-09-25: 70
- 2026-09-24: 70
- 2026-09-23: 69
- 2026-09-22: 68
- 2026-09-21: 68

## Common questions

### What is the io.github.Jannis-E/x402-mcp-server server?

io.github.Jannis-E/x402-mcp-server is listed in the public MCP registry as io.github.Jannis-E/x402-mcp-server. Pay-per-call x402 tools on Base: web extract/render, burn-once secret vault, chart, GeoTIFF. This page covers its npm package (x402-mcp-server_by_milza).

### Is the io.github.Jannis-E/x402-mcp-server server safe to use?

io.github.Jannis-E/x402-mcp-server scores 70 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 25 September 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the io.github.Jannis-E/x402-mcp-server server expose?

io.github.Jannis-E/x402-mcp-server exposes 5 tools: markdown-extractor, spa-dom-to-md, burn-once-secret-vault, svg-bar-chart-renderer, wasm-geotiff-transcoder. Their descriptions and schemas cost roughly 634 tokens of context every time the server is loaded.

### Is the io.github.Jannis-E/x402-mcp-server server still maintained?

io.github.Jannis-E/x402-mcp-server is still listed as active in the MCP registry. We last reached this channel on 25 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the io.github.Jannis-E/x402-mcp-server server under?

io.github.Jannis-E/x402-mcp-server declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/x402-mcp-server_by_milza
- Socket report: https://socket.dev/npm/package/x402-mcp-server_by_milza
- Repository: https://github.com/Jannis-E/x402-mcp-server
- Changelog RSS feed: https://verifymcp.io/servers/jannis-e-x402-mcp-server/x402-mcp-server-by-milza.xml
- Changelog JSON feed: https://verifymcp.io/servers/jannis-e-x402-mcp-server/x402-mcp-server-by-milza.json
- HTML version of this page: https://verifymcp.io/servers/jannis-e-x402-mcp-server/x402-mcp-server-by-milza