"Tool for interacting with databases and generating SQL queries with visualized outputs" matching MCP servers:

Credit and payments for AI agent developers — over MCP. No crypto required

Pay-per-call USDC payment proxy for AI agents. Issue scoped Pay Tokens with hard spending caps and auto-journal every charge to freee / Money Forward / QuickBooks.

Provides a three-layer payment firewall for AI agents, enabling identity verification, risk screening, and execution authorization with on-chain policy enforcement for secure and auditable transactions.

Free x402 endpoint checker plus paid report and metadata tools. Remote MCP server for agents. Written by AI named Nock, not a human.

Enables MCP clients to access all endpoints of an x402 gateway by paying real-time microtransactions (USDC on Base) per API call, with automatic tool discovery and spend guardrails.

Read-only MCP server for Easy Pay Direct / NMI payment gateway, enabling natural language queries of transactions, subscriptions, and customer vault records.

MCP server for interacting with Aruba Fatturazione Elettronica API, enabling users to manage electronic invoices with Claude, including sending invoices to SDI, searching, downloading, and retrieving invoice details and notifications.

Enables AI agents to integrate the SIBS payment gateway, providing tools for creating checkouts, checking payment status, issuing refunds, and generating Multibanco references directly through natural language.

Enables AI agents to integrate Tunzaa Payments by generating accurate boilerplate code and webhook handlers. Operates in mock mode by default with optional live verification against Tunzaa APIs when credentials are provided.

Enables Wave invoicing operations including listing invoices, retrieving details, and generating branded PDFs directly from AI assistants.

MCP server for interacting with Tochka Bank API, enabling balance checks, payments, invoices, and other banking operations through Claude.

Enables interaction with the Crowns game API as MCP tool calls, including x402-based payments.

MCP server for VNPay payment gateway (Vietnam). Supports payment URL generation, transaction queries, refunds, tokenized payments, and IPN verification with HMAC-SHA512 signing.

MCP server for Payme payment system (Uzbekistan). Supports transactions, statements, payment links, and balance queries via JSON-RPC 2.0.

MCP server to connect AI assistants to the AdvinPay payment API, enabling PIX charges, transaction queries, and documentation search.

Enables existing MCP clients to access paid MCP servers by signing x402 payments locally and proxying tool calls, with automatic line management, retries, and spend limits.

Enables MCP tool developers and AI agents to track payments, calculate sales tax liability, and ensure tax compliance across US jurisdictions.

MCP Server for agents to onboard, pay, and provision services autonomously with InFlow

Enables research queries and billing management through the Limex hosted API.

Proxies an existing MCP server to add an x402 paywall, charging AI agents per tool call without modifying the upstream server.