seob5285-alt-x402-facilitator-proxySAFE
"An open, multi-tenant HTTP 402 infrastructure gateway and Model Context Protocol (MCP) server daemon built for autonomous AI agents. Enables programmatic 1% platform-fee split settlements in USDC on Base L2 with plug-and-play templates for Express.js, LangChain (TS), and CrewAI (Python)."
Overview
From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.
A decentralized, autonomous payment infrastructure for API monetization on Base L2 with programmatic fee routing and agent-compatible settlement protocols.
🏗️ Architecture Overview
The X402 Facilitator Proxy implements a complete multi-tenant payment gateway that enables merchants to monetize APIs through HTTP 402 "Payment Required" responses, while autonomous agents can seamlessly settle transactions using USDC on Base L2.
x402-facilitator-proxy/ ├── src/ # Core Cloudflare Worker Engine │ ├── index.ts # Main proxy gateway endpoint │ └── backend/automation/ │ └── sweeper.ts # Automated fee collection ├── x402-client-sdk/ # Core Interface Rails │ ├── src/ │ │ ├── client-library.ts # TypeScript SDK │ │ └── mcp-server.ts # Model Context Protocol Server │ ├── package.json # SDK dependencies │ └── tsconfig.json # TypeScript configuration └── templates/ # Integration Templates ├── express-middleware/ │ └── x402-guard.js # Merchant-Side API Gating ├── langchain-ts/ │ ├── agent.ts # TypeScript Agent Template │ ├── package.json # LangChain dependencies │ └── README.md # Setup instructions └── crewai-python/ └── agent.py # Python Agent Template
🚀 Core Components
1. Cloudflare Worker Proxy Engine
The core backend (src/index.ts) operates as a serverless payment verification gateway deployed on Cloudflare's edge network:
- Endpoint:
https://x402-facilitator-proxy.seob5285.workers.dev/api/v1/verify-and-settle - Platform Vault:
0x2E3DADfb314718849A93c49A78618E586c3b2C60 - Fee Structure: Automated 1% platform fee routing
*
45933583394aOBSERVED · 2026-10-13Connect
Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control. Replace the environment placeholders with a token scoped to the least it needs.
claude mcp add x402-facilitator-proxy -- npx -y [email protected]
Exposed tools (1)
1 read · 0 write · 0 destructive.
| Tool | Risk | Description |
|---|---|---|
route_x402_payment | read | Executes an automated multi-tenant utility split payment on Base L2 network (routing 1% facilitator fee) and settles access validation. |
Trust audit
SAFEgrade B · trust 89/100 Nothing in the source contradicts what it says it does. Grade A is reserved for packages that have also passed the behavioural sandbox.
| Layer | What it checks | Result |
|---|---|---|
| L0 | Provenance & inventory | PASS |
| L1 | Static analysis of the code | PASS |
| L2 | Instruction surface (what it tells the agent) | PASS |
| L3 | Class-specific surface | PASS |
| L4 | Behavioural (sandbox) | SKIPPED |
What the source does
- Filesystem
- none-observed
- Network
- declared (5 observation(s))
- Shell
- none-observed
- Dependencies
- not all pinned
- Secrets in source
- none-found
Findings (5)
ethers, hono, viem, x402-facilitator-proxy, @cloudflare/workers-types, dotenv, tsx, wrangler
@langchain/core, @langchain/openai, langchain, ethers, zod, @types/node, tsx, typescript
@modelcontextprotocol/sdk, ethers, zod, tsx, typescript, @types/node
mcp-publisher.exe
Gates applied: no_behavioural_pass, no_license.
45933583394afull audit observations/trust-audit/mcp-server/seob5285-alt__x402-facilitator-proxy.json · Report an issue / request a re-scanAudit history
Every audit this server has had. A grade with a past is a grade somebody is still checking.
| Date | Source | Verdict | Grade | Score | Change |
|---|---|---|---|---|---|
| 2026-10-13 | 45933583394a | SAFE | B | 89 | first audit |
Questions
What is the seob5285-alt-x402-facilitator-proxy MCP server?
"An open, multi-tenant HTTP 402 infrastructure gateway and Model Context Protocol (MCP) server daemon built for autonomous AI agents. Enables programmatic 1% platform-fee split settlements in USDC on Base L2 with plug-and-play templates for Express.js, LangChain (TS), and CrewAI (Python)."
What tools does seob5285-alt-x402-facilitator-proxy expose?
1 in total: 1 read-only, 0 that write, and 0 that can delete or overwrite. Every one is listed on this page with its risk.
Is seob5285-alt-x402-facilitator-proxy safe to connect to an agent?
The audit found nothing in the source that contradicts what it says it does, and graded it B (89/100). Grade A is held back for packages that have also passed a sandboxed behavioural run, which is why a clean server reads B.
What credentials does seob5285-alt-x402-facilitator-proxy need?
It reads HOT_WALLET_PRIVATE_KEY from the environment. Give it a token scoped to the least it needs — an agent that can be talked into calling a tool can be talked into calling it with your credentials.
How does seob5285-alt-x402-facilitator-proxy run?
It speaks stdio, so it runs as a local process your client starts. It is published on npm as @x402/client-sdk at 1.0.0.
How current is this page?
The grade is for one exact copy of the source (45933583394a), read on 2026-10-13. The repository is watched and re-audited when it changes.