"Multi-user Google Calendar and Sheets MCP server with OAuth token authentication" matching MCP servers:

Streamable HTTP MCP server that exposes user and billing management tools, resources, and prompts through a REST API, enabling natural language interaction with user profiles, bills, and sharing features.

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

Enables MCP-capable LLMs to securely autofill and save invoices on Digital Invoicing Software on behalf of tenants, with multi-tenant authentication and session management.

Discover audio and LLM services, compare seven voices, and check prices for free. Generate speech, transcribe audio and request LLM text with optional capped USDC payments on Base; voice-cloning requirements are also available.

MCP server for interacting with NexBank API v2, providing six business tools and supporting Bearer Token or OAuth authentication.

Enables Pix payment operations (cash-in/cash-out) and webhook management for Intra Pay via natural language, supporting multi-tenant authentication.

Exposes the Ravex Partner API to MCP-compatible AI agents, with secure bearer-token authentication, idempotent write operations, and webhook-based reconciliation for async processing.

Generates professional invoices from Claude Desktop using RapidInvoice and stores them in Supabase, with support for multi-currency, public share links, and user-specific billing limits.

An MCP server that wraps the Check Payroll API, providing 263 tools for managing companies, employees, contractors, payrolls, tax configuration, and more.

A read-only MCP server for the open-banking.io PSD2 API that lets AI agents query personal bank balances and transactions via natural language, with zero-knowledge encryption ensuring all sensitive data is decrypted in-process and never exposed to third parties.

Enables LLM agents to manage QuickBooks Online invoices, customers, and payments via typed tools with OAuth 2.1 authentication, rate limiting, and retries, plus read-only resources for company and receivables summaries.

MCP server exposing a fictional payment domain as tools, resources, and prompts, enabling reasoning over transactions, payment hubs, services, and system health.

MCP Server for AI agents to discover and call pay-per-request APIs via EntRoute. Give Claude, Cursor, Windsurf, or any MCP-compatible agent access to 350+ verified x402 API endpoints across 110+ capabilities — DeFi prices, web search, prediction markets, news, and more.

Talk to your DeonPay merchant account from any MCP-compatible AI host. Enables reading transactions, creating payment links, inspecting subscriptions, and more.

Generate crypto QR codes (BTC, ETH, SOL, USDC, USDT, EURC) and manage payment sessions from Claude Desktop or any MCP client. Non-custodial, free.

Exposes all 379 Invoice Ninja v5 REST API endpoints through three consolidated tools (list, describe, call), enabling full invoice management and business operations via natural language.

Create invoices from any MCP client via the Invovate API — compute totals and generate PDF, JSON, or UBL invoices in 11 languages. Exposes four tools: calculate_invoice_totals (no API key needed), generate_invoice_pdf, generate_invoice_ubl, and get_invoice_capabilities.

Enables issuing invoices, proformas, and delivery notices, collecting payments, submitting e-Factura to Romania's SPV, and querying reference data on Oblio.eu through natural language from MCP clients.

An MCP server that exposes Alipay AI Pay capabilities to AI agents, enabling skill discovery, payment integration guides, and merchant onboarding workflows via Alipay's payment APIs.

Enables AI agents to directly operate ChainPay cryptocurrency payment system, including order creation, balance checks, and withdrawals.