x402 Merchant Check
Pre-payment merchant trust checks for x402 agents on Base and Solana.
MCP server · by gradientdecisions.com
About
x402 Merchant Check is an MCP server published by gradientdecisions.com. Marketplaces we read that list it: 1 (Official MCP Registry). We first saw it on 2026-10-11 and have recorded no change since. As of our marketplace pass on 2026-10-12.
What it asks for
- Runs remotely
None of the marketplaces we read publishes its tools or the settings it asks for.
What it declares, asks for and runs, in full
Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.
Works with
- Claude Code
- Codex
- Cursor
- VS Code
- Copilot CLI
A one-click link opens the client, which asks you to confirm before it adds the server.
From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.
Connect
Commands and configs built only from what its marketplaces declare. We do not run them for you and do not test plugins.
As a remote MCP server
Built from what Official MCP Registry declares.
claude mcp add --transport http merchant-check https://mcp.gradientdecisions.com/mcp[mcp_servers.merchant-check]
url = "https://mcp.gradientdecisions.com/mcp"{
"mcpServers": {
"merchant-check": {
"url": "https://mcp.gradientdecisions.com/mcp"
}
}
}Where it is published
| Marketplace | Status | Version | Figures | Verified | First seen |
|---|---|---|---|---|---|
| Official MCP Registry (Open the registry record) | Listed | 1.0.0 | Forks (GitHub): 0 Stars (GitHub): 0 |
Not marked |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
What changed
Nothing has moved on this plugin since we started watching it.
Similar plugins
Products whose own names, descriptions, tools and skills are closest in meaning to this one, on every marketplace we read. Closeness is ranked within this list only.
-
Risk-check counterparties before an AI agent pays; pay x402 resources only after a verified allow
-
Read-only Base mainnet reader. Verifies x402 payment settlements + AFTA federation status.
-
Inspect and validate an x402 endpoint before an autonomous agent spends USDC.
-
Verify signed x402 payments; treasury-scoped settlement is irreversible.
-
mizan app.higgsfield.mizan-bazar/mizan
Check an x402 endpoint before your agent pays it: avoid / caution / ok, proven on-chain.
-
AgentPay — trust routing + spend caps for x402 agents
Buyer-side trust oracle + capped sessions for x402 agents: verified_route, receipts, 17 free tools.
-
Check an x402 endpoint before your agent pays it: challenge validity and on-chain payer evidence.
-
AgentObserver - Check x402 Dependencies Before Paying
Check Exa, BlockRun, OneSource, Apify and other x402 dependencies before invoking or paying.
-
MCP bridge for autonomous x402 payments in HPP USDC.e — discover and pay for services per call.
-
Ask probe402's public record about an x402 or MPP endpoint before an agent pays it.
Similar plugins by marketplace
The same question asked of one marketplace at a time: is there an analog of this plugin there?
Has a listing on Claude Code: claude-plugins-community (5)
-
Inspect, debug, and test Machine Payments Protocol (HTTP 402) endpoints directly from Claude Code. Parses spec-compliant WWW-Authenticate challenges, discovers MPP endpoints on…
-
Payment infrastructure for AI agents. Agent Credit Score (300-850), real payment rails (Stripe/Paystack/Lightning), autonomous shopping with escrow, hash-chained ledger, and…
-
Accept any crypto payments (Bitcoin, Solana, Ethereum, Base, Arbitrum, Optimism, Polygon, BSC, Sui, plus stablecoins like USDC/USDT) in any Claude-built app via CoinVoyage…
-
Solana token safety scanner behind x402 micropayments. Checks mint/freeze authority, holder concentration, liquidity, LP locks, honeypot detection, metadata mutability, token age…
-
Build on Solana with Helius — live blockchain tools, expert coding patterns, and autonomous account signup
Has a listing on Claude Code: claude-plugins-official (5)
-
Ship stablecoin apps faster. Best-practice skills for USDC payments, cross-chain transfers, wallets, and smart contracts — plus Circle's MCP server for real-time SDK and…
-
Build Airwallex payment integrations in your own codebase. Generates the checkout, card-element, onboarding, and subscription-billing code for an Airwallex integration and wires…
-
Bring Airwallex's global financial infrastructure to Claude. Orchestrate actions across your account in plain language, e.g., set up invoices from a PO, onboard suppliers from…
-
PayPal development plugin for Claude — integrate payments, subscriptions, invoices, disputes, and more using PayPal's APIs and MCP server
-
Mercado Pago full-product integration toolkit. One agent routes to four orchestration skills (mp-integrate wizard, mp-webhooks, mp-test-setup, mp-review) that pull every endpoint…
Has a listing on Claude: knowledge-work-plugins (5)
-
Bring Airwallex's global financial infrastructure to Claude. Orchestrate actions across your account in plain language, e.g., set up invoices from a PO, onboard suppliers from…
-
Carta Cap Table plugin — skills and hooks for querying cap tables, grants, SAFEs, 409A valuations, waterfall scenarios, and more
-
Search companies and contacts, enrich leads, find lookalikes, and get AI-ranked contact recommendations. Pre-built skills chain multiple ZoomInfo tools into complete B2B sales…
-
Ask Claude about the contractors you pay through Wingspan, what you owe them, and what is holding up a payment, then onboard contractors and log payments as drafts, with a preview…
-
QuickBooks business insights and actions: financial health briefings across P&L, cash flow, balance sheet and A/R, industry benchmarking, payroll cost analysis, overdue-invoice…
Has a listing on Codex: openai-curated (openai/plugins) (5)
-
Develop your payments integration faster with the ability to create products, prices, and payment links directly in ChatGPT. Run your business from ChatGPT with the ability to…
-
CrowdStrike Falcon Foundry development skills for building cybersecurity applications on the Falcon platform. Includes UI development, collections, functions, workflows, API…
-
Cloudflare platform plugin with curated skills for Workers, Wrangler, and Agents SDK plus the official Cloudflare API MCP server.
-
Public equity investing workflows for listed-company research, earnings analysis, valuation, model updates, long/short pitches, catalysts, thesis tracking, ETF/index and…
-
Evaluate Codex skills and plugins from chat with a beginner-friendly start command, local-first reports, token budget explanations, and guided benchmarking.
Has a listing on Community GitHub marketplaces (5)
-
Ship stablecoin apps faster. Best-practice skills for USDC payments, cross-chain transfers, wallets, and smart contracts — plus Circle's MCP server for real-time SDK and…
-
agentforge io.github.acarchidi/agentforge
DeFi safety layer for AI agents: wallet safety, token risk, tx decode/simulate. 20 tools.
-
Deprecated — renamed to airwallex-agentos. Run: /plugin install airwallex-agentos
-
Build Airwallex payment integrations in your own codebase. Generates the checkout, card-element, onboarding, and subscription-billing code for an Airwallex integration and wires…
-
Bring Airwallex's global financial infrastructure to Claude. Orchestrate actions across your account in plain language, e.g., set up invoices from a PO, onboard suppliers from…
Has a listing on Copilot CLI: github/awesome-copilot (5)
-
Accept payments and grow your business. Stripe's agent plugin includes best practices, upgrade guidance, and our MCP server.
-
Safe BLE diagnostics, evidence workflows, and guarded automation for AI agents.
-
Three-layer verification pipeline for AI output. Extracts claims, finds sources, and flags hallucination risks so humans can verify before acting.
-
Visualizes live session AI-credit usage as a Pac-Man board with pellets, ghosts, fruit milestones, and game-over limits.
-
Explore and query TimeBase streams, schemas, QQL, symbols, and server status via MCP.
Has a listing on Copilot CLI: github/copilot-plugins (5)
-
Toolkit for building Microsoft 365 Copilot declarative agents — scaffolding, JSON manifest development, and capability configuration.
-
mobile-app
Build and deploy Power Apps code apps for mobile using Expo (React Native), with native device functionality and Power Platform connectors
-
Advanced Security plugin for GitHub Copilot.
-
mcp-apps
Generate MCP App widgets for MCP tools. Produces self-contained HTML widgets using the MCP Apps protocol.
-
Build Power Apps Canvas Apps using the Canvas Authoring MCP server.
Has a listing on Cursor: cursor/plugins (5)
-
Check balances, get quotes, and preview or place trades.
-
Use your X Money Card, send money to users on X, manage your finances, view your balance and browse through your transaction history.
-
Work with payments, orders, catalog, customers, and invoices.
-
Review positions, balances, P&L, and draft trade instructions.
-
Read and write invoices, contacts, reports, and payroll.
Has a listing on Docker MCP Catalog (5)
-
Tools for cross-border payments, taxes, and compliance.
-
Provides access to Mercado Pago Marketplace API.
-
OpenZeppelin Stellar Contracts
Access to OpenZeppelin Stellar Contracts.
-
mcp io.github.hummingbot/mcp
MCP server exposing Hummingbot API for automated multi-exchange trading
-
Access to OpenZeppelin Stylus Contracts.
Has a listing on Official MCP Registry (5)
-
Risk-check counterparties before an AI agent pays; pay x402 resources only after a verified allow
-
Read-only Base mainnet reader. Verifies x402 payment settlements + AFTA federation status.
-
Inspect and validate an x402 endpoint before an autonomous agent spends USDC.
-
Verify signed x402 payments; treasury-scoped settlement is irreversible.
-
mizan app.higgsfield.mizan-bazar/mizan
Check an x402 endpoint before your agent pays it: avoid / caution / ok, proven on-chain.
Found by meaning, not by shared code or a shared repository: similar plugins stay separate products, and this is not a review or a recommendation.
Is this your plugin?
Add it to your projects and prove you maintain it with a file in its repository, a file on your domain or a DNS record. You get alerts when a marketplace lists it, drops it, changes its verified mark or what it asks for, and its remote endpoint goes on monitoring as a web service.
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.