"A tool or integration for communicating with Notion" matching MCP servers:

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

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.

Create free, no-signup invoices from your AI assistant — the create_invoice tool returns a link that opens blankinvoicemaker.com pre-filled, ready to download as a watermark-free PDF.

Lets AI agents discover, pay for, and call any HTTP API per request using USDC, with gasless nanopayments and no API keys or accounts needed.

MCP server for cryptocurrency payment integration, enabling payment requests, webhook verification, and payment URL building.

Enables to generate, decode, and validate PayBySquare QR codes for Slovak payments, with MCP integration for use with Claude Desktop and other MCP clients.

An MCP server for KG Financial's payment services integration, enabling AI coding tools to generate accurate code by automatically searching payment integration documentation through natural language queries.

Enables AI assistants to parse, validate, send, and inspect X12 EDI documents via the SignalEDI Core API, with optional QuickBooks integration and a demo mode for keyless local testing.

Enables AI assistants like Claude Code or Cursor to interact with a PNLCS billing panel, querying and managing clients, invoices, orders, tickets, and transactions via natural language.

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.

Pay for any x402-gated content or API with USDC micropayments on Base. Discover payment gates, execute payments, and view transaction history.

Give your AI agent a prepaid card to pay per call for hundreds of paid services — no per-vendor signups or API keys.

MCP server for the x402 micropayment marketplace minia2a.uk, enabling AI agents to discover, call, and pay for 1,700+ services using USDC micropayments with no API keys or subscriptions. Supports registration, credits, service browsing, and autonomous calling with Claude Code auto-mode.

Provides AI agents with structured, verified specs for African APIs like Wave and Paycard, enabling automatic integration code generation without manual documentation parsing.

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

Enables AI agents to verify proposed payments against their assigned task, budgets, permitted categories, and counterparties, returning an ALLOW or DENY decision with a tamper-evident audit trail.

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

A Model Context Protocol server that exposes the flexprice API as tools for AI assistants, enabling management of customers, plans, prices, subscriptions, invoices, payments, and events from IDEs or CLI.

Enables AI agents to discover, call, and pay for 170+ x402 micropayment services via the minia2a marketplace, with automatic USDC payments and no API keys or subscriptions.