GateCheck By LarryBuildsAI
- LarryLemonBot/LarryBuildsAI
GateCheck is an MCP server that runs preflight checks on paid x402 and MCP tools before marketplace listing.
About
GateCheck is an MCP server that acts as a preflight gate for developers who plan to sell agent capabilities through x402 and MCP marketplaces. Before you pay listing fees or expose a SKU on xpay-style portals, you want a structured readiness pass that mirrors what buyers and platforms expect: paid-path behavior, agent-tool readiness, and documentation hooks like product cards and server cards. GateCheck is published alongside Boundary Guard x402 in the LarryBuildsAI proof-before-pay stack, so it complements deep probes and launch-pack generation rather than replacing them. For a developer wearing product, security, and GTM hats, it compresses “are we allowed to list this?” into agent-invokable checks instead of a manual spreadsheet. Use it when the implementation exists but the marketplace narrative and technical proof are not yet aligned. It does not execute trades, host payments, or enrich private databases—it validates that your paid tool story matches probe-ready evidence.
- Preflight checks tailored to paid x402 and MCP tools before marketplace listing
- Product positioning as GateCheck by LarryBuildsAI with Glama and server-card discovery URLs
- Integrates with Boundary Guard x402 ecosystem (xpay proxy and portal endpoints in registry metadata)
- Search-oriented coverage: seller readiness, unpaid 402 probe, MCP launch pack, agent tool readiness checker
- Explicitly separate from Signal Desk and ResultRail for focused listing gate workflow
GateCheck By LarryBuildsAI by the numbers
- Data as of Jul 7, 2026 (Skillselion catalog sync)
claude mcp add --transport http gatecheck https://proofbeforepay.vercel.app/gatecheck/mcp --header "Authorization: Bearer YOUR_TOKEN"Add your badge
Show developers this MCP server is listed on Skillselion. Paste this into your README.
| Transport | HTTP |
|---|---|
| Auth | Required |
| Repository | LarryLemonBot/LarryBuildsAI ↗ |
What it does
Run seller preflight on paid x402 and MCP tools so marketplace listings pass readiness before you publish on xpay or similar portals.
Who is it for?
Best when you're preparing first paid MCP or x402 listings and already have an endpoint and need GateCheck-branded preflight aligned with Boundary Guard tooling.
Skip if: Developers still validating product-market fit with no paid endpoint, or teams needing full penetration testing of custom backends unrelated to x402 listing rules.
What you get
After adding GateCheck, your agent can complete listing-oriented preflight so you ship to xpay or Glama with clearer readiness evidence.
- Seller readiness preflight outcome oriented to marketplace listing
- Pointers to product card and server-card assets for listing copy
- Clear separation from Signal Desk (spend routing) and ResultRail (data packs)
By the numbers
- Product name GateCheck by LarryBuildsAI in registry metadata
- Homepage and server-card hosted on proofbeforepay.vercel.app/gatecheck
- Related stack: Boundary Guard x402, Signal Desk, ResultRail (separate products)
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Marketplace seller preflight MCP, not a pay-per-success data API like ResultRail.
FAQ
Who is GateCheck for?
Developers and small teams publishing paid MCP or x402 agent tools who want LarryBuildsAI’s listing preflight inside an MCP client before going live on marketplaces.
When should I use GateCheck?
Use it in ship/launch when the tool works locally but you have not yet listed on xpay, Glama, or similar—and you need seller readiness and launch-pack alignment checks first.
How do I add GateCheck to my agent?
Register mcp:io.github.LarryLemonBot/gatecheck from the MCP registry, then point your client at the publisher server-card and homepage URLs on proofbeforepay.vercel.app/gatecheck per their well-known metadata.