Supports Coinbase CDP facilitator for x402 payment settlement, enabling pay-per-call USDC payments on Base.
GEO Audit tool scores a URL's visibility to Google AI Overviews across weighted checks and returns concrete fixes.
GEO Audit tool scores a URL's visibility to Perplexity as an AI search engine across weighted checks and returns concrete fixes.
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@Storefront Grader grade https://mystore.com and show me the failing checks"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
Pay-per-call MCP APIs for AI agents. Every call is settled in USDC via the x402 protocol on Base — no accounts, no API keys, no subscriptions. Payment is the auth: your agent pays per call and gets the result.
Operated by Harrison Truong · Contact: theharrisontruong@gmail.com
Service | What it does | MCP tool | Price | Status |
AI Storefront Readiness Grader | Grades any storefront URL A–F across 20 weighted conversion-readiness checks (checkout friction, trust signals, mobile readiness, merchandising completeness) and returns the failing checks |
| $1.00 / call | ✅ LIVE |
GEO Audit | Scores any URL's visibility to AI search engines (ChatGPT, Perplexity, Claude, Google AI Overviews) across 20 weighted checks and returns concrete fixes. Free tier: |
| $1.50 / call | ✅ LIVE |
A11y Audit | Accessibility lawsuit-risk scan: 20 weighted WCAG checks plus a lawsuit-risk level, framed as risk reduction for US businesses. Automated triage, not a certification |
| $1.50 / call | Code complete — deploys with the next release |
Feed Audit | Product-feed hygiene audit: flags the feed errors that get listings disapproved or suppressed before they cost sales | — | $1.00 / call | Code complete — deploys with the next release |
Service | MCP endpoint | HTTP endpoint |
Storefront Grader |
|
|
GEO Audit |
|
|
Both take { "url": "https://your-site.example" }. Source for every service lives in
this repo (grader/, geo/, a11y/).
Add either live service to any MCP client as a remote server:
{
"mcpServers": {
"storefront-grader": { "url": "https://grader-al6bxcngia-ue.a.run.app/mcp" },
"geo-audit": { "url": "https://geo-al6bxcngia-ue.a.run.app/mcp" }
}
}Related MCP server: Agent Readiness MCP
Call the tool or endpoint without payment → you get an HTTP 402 with the full payment requirements (amount, network, pay-to address).
Pay in USDC on Base mainnet (eip155:8453) with any x402 client (@x402/fetch,
the x402 Python package, CDP or PayAI wrappers) and retry with the payment proof.
The call runs and returns the result. No signup, no key management, no invoice.
Discovery documents (/.well-known/x402):
Both services also declare the Bazaar discovery extension (extensions.bazaar) in
their 402 responses, so catalog crawlers can index the paid routes from the 402 alone.
Payment terms: x402 exact scheme · asset USDC
(0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) · pay to
0xd702C8A8Ee30F6950A2a663010d12FC195D5348e · facilitator PayAI
(https://facilitator.payai.network), with Coinbase CDP facilitator support built in.
Official MCP Registry —
io.github.theharrisontruong-web/storefront-grader ·
io.github.theharrisontruong-web/geo-audit
Glama (both A-rated) — Storefront Grader · GEO Audit
Smithery — namespace theharrisontruong:
storefront-grader ·
geo-audit
x402scan — Storefront Grader
server.json — Official MCP Registry manifest for the Storefront Grader (remote).
server-geo.json — Official MCP Registry manifest for GEO Audit (remote).
server-a11y.json — Official MCP Registry manifest for A11y Audit (publishes on deploy).
glama.json — Glama maintainer claim for this repository.
MIT — see LICENSE. The license covers this documentation/metadata repo; the hosted services themselves are pay-per-call as described above.
This server cannot be deployed
The website checker for AI agents. One call: verdict, score out of 100, fix list.
Tests an AI agent's purchase against the task it was given. Paid per call in USDC via x402.
Solana address risk grades and token scans for AI agents. Pay-per-call via x402 (USDC on Base).
Pay-per-call browser rendering and x402 marketplace ranking for AI agents, billed via USDC.
