GateCheck by LarryBuildsAI
One-cent x402 and MCP readiness checks plus fixed-price marketplace launch packs.
Open source Repository Open in the app JSON README (API)
About
One-cent x402 and MCP readiness checks plus fixed-price marketplace launch packs.
Details
- Kind
- MCP servers
- Topic
- Finance & crypto
- Publisher
- larrylemonbot
- Origin
- official
- Category
- ferramentas
- Transport
- http
- Version
- 0.1.3
- Last push
- 2026-07-14T23:20:33Z
- Repository state
- ativo
- Added
- 2026-08-29 03:02:01
- Updated
- 2026-08-29 03:02:01
- Origin id
io.github.LarryLemonBot/gatecheck
README
# GateCheck by LarryBuildsAI
GateCheck is a hosted remote MCP server and x402 readiness surface for paid agent-tool sellers.
Use it before public submission, promotion, or paid agent routing to verify that a paid x402 or MCP tool is discoverable, inspectable, and claim-bounded.
## Hosted MCP Endpoint
- Remote MCP URL: `https://proofbeforepay.vercel.app/gatecheck/mcp`
- Transport: `streamable-http`
- Public introspection: `initialize` and `tools/list`
- Protected tool execution: bearer auth may be required for direct production calls
- Product homepage: `https://proofbeforepay.vercel.app/gatecheck`
- Scorecard: `https://github.com/LarryLemonBot/gatecheck/blob/main/scorecard.md`
- Product card: `https://proofbeforepay.vercel.app/gatecheck/product-card.md`
- Marketplace index: `https://proofbeforepay.vercel.app/gatecheck/marketplaces.json`
## MCP Client Config
```json
{
"mcpServers": {
"gatecheck": {
"type": "streamable-http",
"url": "https://proofbeforepay.vercel.app/gatecheck/mcp"
}
}
}
```
If your client supports request headers and you have a GateCheck production token, add:
```json
{
"Authorization": "Bearer YOUR_GATECHECK_TOKEN"
}
```
Do not put private keys, wallet secrets, cookies, customer data, or marketplace dashboard credentials into public metadata.
## Tools
GateCheck currently exposes six MCP tools:
- `boundary_guard_check`
- `scan_x402_resource`
- `probe_x402_paid_path`
- `check_agent_tool_readiness`
- `generate_x402_launch_pack`
- `generate_trust_receipt`
Public `tools/list` is available so buyers, agents, and directories can inspect the tool inventory before protected calls.
## Buy through PayanAgent
These fixed-price offers settle in USDC through PayanAgent and automatically return the purchased GateCheck artifact:
- [Quick x402 readiness check — $0.01 launch price](https://payanagent.com/marketplace/offers/kh738f3cbjbe89xhrtgzcxrg558agye2)
- [Single-route launch pack — $9](https://payanagent.com/marketplace/offers/kh79mkywpaqdd5ca53hah5e1z98ahzg0)
- [Service launch pack — $29](https://payanagent.com/marketplace/offers/kh7fw80665fqap3a8wq2pjx8wx8aghzc)
- [Premium marketplace launch pack — $49](https://payanagent.com/marketplace/offers/kh76jzxdp8k5e3nr56ctp2c0qh8ag7jj)
Buyer input is validated before PayanAgent presents the payment flow. Generated launch packs contain listing and approval-review artifacts; they do not publish listings, contact buyers, or claim marketplace endorsement.
## What GateCheck Checks
- Product-scoped discovery: homepage, `llms.txt`, `agents.txt`, product card, skill card, sitemap, and MCP server card.
- MCP inventory: public initialize and tool-list introspection.
- x402 behavior: unpaid `402` challenge metadata without submitting payment signatures or moving funds.
- Listing readiness: buyer-facing copy, prices, evidence links, launch-pack artifacts, and claim boundaries.
## Claim Boundary
GateCheck reports and receipts prove observed public metadata, unpaid `402` behavior, request summaries, hashes, and returned artifacts only.
They do not prove marketplace endorsement, settlement, security certification, custody, KYC/AML coverage, buyer adoption, or downstream execution.
## Product Boundary
GateCheck is separate from Signal Desk and ResultRail.
This repository is the public distribution and marketplace-submission surface for GateCheck only.
## Current Public Visibility
Verified public surfaces include:
- GateCheck remote MCP endpoint: `https://proofbeforepay.vercel.app/gatecheck/mcp`
- Official MCP Registry: `https://registry.modelcontextprotocol.io/v0.1/servers?search=io.github.LarryLemonBot/gatecheck`
- Smithery: `https://smithery.ai/servers/larrybuildsai/gatecheck`
- Glama: `https://glama.ai/mcp/connectors/io.github.LarryLemonBot/gatecheck`
- mcpservers.org: `https://mcpservers.org/servers/x402-resource-scanner-vercel-app-gatecheck-marketplaces`
Known external blockers: the former MCP.so listing URL currently returns `404`, and `https://xpay.tools/agents.txt` has not exposed `gatecheck`. Neither surface is claimed as live.
## Marketplace Packet
- Cline submission draft: `marketplaces/cline-submission.md`
- MCP.Directory submission draft: `marketplaces/mcp-directory-submission.md`
- Server manifest: `server.json`
- Public scorecard: `scorecard.md`
- Logo SVG: `assets/gatecheck-logo.svg`
- Logo PNG: `assets/gatecheck-logo.png`