io.github.Har50/gateway — WebMCP discovery and gasless Base Mainnet settlement

The MCP server io.github.Har50/gateway provides WebMCP discovery and enables gasless settlement on Base Mainnet. It supports session keys and x402, with execution and security components including Tenderly pre-flight safety and sponsored UserOps (Pimlico), backed by a Go Redis rate-limit gateway.

🛠️ Key Features

WebMCP discovery
Gasless Base Mainnet settlement via session keys and x402
EIP-7579 session keys
Tenderly pre-flight safety
Sponsored UserOps (Pimlico)
Go Redis rate-limit gateway

🚀 Use Cases

AI agents that need x402 HTTP paywalls
Transaction flows requiring sponsored UserOps on Base Mainnet
Systems that want Tenderly pre-flight safety before execution

⚡ Developer Benefits

Standalone Base L2 API surface for AI agents
Architecture and system design documentation (e.g., docs/ARCHITECTURE.md)
Developer-facing approach via an execution/security rail for agentic transactions

⚠️ Limitations

Not part of vda-compliance (per repository excerpt)

{ "type": "object", "properties": { "fromAddress": { "type": "string", "description": "The Safe Smart Account address performing the action." }, "targetAddress": { "type": "string", "description": "Target contract or token recipient address." }, "calldata": { "type": "string", "description": "Hex-encoded transaction calldata." }, "valueWei": { "type": "string", "description": "Native token value in Wei (defaults to '0')." }, "maxAllowedDrainUSD": { "type": "number", "description": "Maximum allowable wallet drain in USD during simulation guardrail check." }, "sessionKeyId": { "type": "string", "description": "Optional ERC-7579 session key id to enforce spend/target caps." }, "agentId": { "type": "string", "description": "Agent identifier for session scoping." } }, "required": [ "fromAddress", "targetAddress", "calldata" ] }

{ "type": "object", "properties": { "fromAddress": { "type": "string" }, "targetAddress": { "type": "string" }, "calldata": { "type": "string" }, "valueWei": { "type": "string" }, "maxAllowedDrainUSD": { "type": "number" } }, "required": [ "fromAddress", "targetAddress", "calldata" ] }

{ "type": "object", "properties": { "agentId": { "type": "string" }, "maxUsdc": { "type": "number" }, "ttlHours": { "type": "number" }, "target": { "type": "string" } }, "required": [ "agentId" ] }

Docs

Doc

Purpose

Investor pitch

Executive summary, stack diagram, GTM

Architecture

System design

Website launch

Portal strategy + hero copy

MCP

Cursor / Claude Desktop

Production roadmap

Deploy checklist

Master plan

Product plan

WebMCP SDK quickstart

Browser → AgentExec adapter

Executive pitch deck

One-page technical summary

Keeper verification

Base Sepolia drain → auto top-up

Mainnet checklist

Production go-live

Quick start (API)

bash

npm install && npm test && npm run dev
# http://127.0.0.1:8787  ·  Swagger: /docs

bash

# x402 sample paywall (protects /v1/paid/*)
X402_ENABLED=true \
X402_RECIPIENT=0xYourTreasury \
X402_PRICE_USDC=0.01 \
npm run dev

bash

# Production stack
cp .env.example .env   # fill secrets
npm run prod:up        # docker compose -f docker-compose.prod.yml up -d --build
# Gateway: http://localhost:8080

# MCP (stdio → gateway)
API_BASE_URL=http://localhost:8080 AGENT_API_KEY=dev-agent-key npm run mcp

Install

Tools (4)

execute_onchain_intentget_smart_account_infodry_run_simulationissue_session_key

Remote endpoint

Streamable HTTP

Hosted server - connect over the network, no local install.

url

https://api.agentexec.dev/mcp

Add to VS Code Add to Cursor

claude_desktop_config.json

json

{
  "mcpServers": {
    "gateway": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://api.agentexec.dev/mcp"
      ]
    }
  }
}

Desktop config is stdio-only; this bridges via mcp-remote. Native remote: Settings > Connectors.

AgentExec WebMCP & Base L2 Gateway

io.github.Har50/gateway — WebMCP discovery and gasless Base Mainnet settlement

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

⚠️ Limitations

Topics

execute_onchain_intent

get_smart_account_info

dry_run_simulation

issue_session_key

AgentExec — Base L2 AI Transaction Provider

Docs

Quick start (API)

Website (AgentExec landing)

Middleware

Install

Remote endpoint

Related servers

fromAddress	string	required	The Safe Smart Account address performing the action.
targetAddress	string	required	Target contract or token recipient address.
calldata	string	required	Hex-encoded transaction calldata.
valueWei	string	optional	Native token value in Wei (defaults to '0').
maxAllowedDrainUSD	number	optional	Maximum allowable wallet drain in USD during simulation guardrail check.
sessionKeyId	string	optional	Optional ERC-7579 session key id to enforce spend/target caps.
agentId	string	optional	Agent identifier for session scoping.