"How to use Google Calendar and Gmail effectively" matching MCP servers:

Enables inspection of subscription catalogs and tracks, plus controlled updates to regional base-plan prices through the Android Publisher API.

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.

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

Enables AI agents to call Safaricom's M-Pesa Daraja API directly, sending STK push prompts, checking balances, looking up or reversing transactions, and receiving results as SUCCESS, FAILED, or UNKNOWN. Requests are sent once per idempotency key with sandbox-by-default operation, so agents can operate and test payments without risking double charges or real money.

A local, read-only stdio MCP server that lets a Grok Build CLI agent check how much of its weekly SuperGrok / Grok Build usage pool is left, when the period resets, and its Extra Usage cap via tools like get_budget. It reads the existing grok login session and returns per-product figures as JSON, mirroring the TUI /usage screen, so agents can pause before expensive work when quota runs low.

Exactly-once execution for irreversible agent actions: an agent claims the right to run an effect, and a retry after a lost response returns the sealed result instead of charging again. 12 tools over stdio, including a gateway mode where the agent holds a single-use ticket and never the provider key.

Connects Claude to the customer side of Housecall Pro, letting you view estimates and invoices, check company details, and decline estimate options using the link your contractor sent.

Lets AI agents encrypt a password, API key, or note locally, pay a small USDC fee over x402 on Base, and share a single-use link that can be opened exactly once and is destroyed on read. Reading is free, expiring unread secrets are cleaned up, and the server only ever stores ciphertext.

Payment infrastructure MCP server enabling AI agents to make gasless USDC payments on Base and JIT single-use virtual card checkouts, with zero-trust card handling, merchant checkout hints, and signed receipts.

Enables Claude to interact with a Folio business bank account for managing accounts, transactions, receipts, bookkeeping, and payments as drafts.

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

10 MCP servers so agents can work in Korea: Naver Smart Store, Coupang, Cafe24, public data (business status, holidays, addresses), HWP files, KakaoTalk, Popbill e-tax invoices & 알림톡, Toss Payments, Japan→Korea sourcing, tax calendar — with human approval on every write. npm @appmonster/mcp-*.

Enables users to access transaction reports and exports, create payment links, and optionally match payments to a payer roster workbook through an MCP interface.

Lets an MCP client find overdue Stripe invoices, see who owes what and how late they are, and re-send reminder emails for invoices that are still open. Runs read-only unless writes are explicitly enabled, re-checks invoice state before sending, and logs every call to an audit trail.

Enables reading the school lunch calendar, managing students, placing and changing orders, and tracking deliveries and payments on a My Hot Lunchbox parent account. It signs in server-side with account credentials and exposes 38 MCP tools with confirm-gated write operations.

Stdio bridge for Frantic's live bounty-board MCP. Use npx -y frantic-mcp in stdio-only clients; remote clients connect at https://api.gofrantic.com/mcp. Browse funded work, claim bounties, submit artifacts and inspect the public receipt ledger. Posting and funding use Base USDC through x402; agents are paid after accepted delivery. Guide: https://gofrantic.com/AGENTS.md.

MCP server for document intelligence via x402 micropayments. 6 tools: document analysis, invoice extraction, screenshot data, alt text, PII detection, sentiment analysis. Pay-per-use with USDC on Base — no API keys needed.

Live market intelligence for AI agents, paid per call in USDC on Base via x402 — no API key or signup. SEC insider trades and insider cluster buying, Polymarket and Kalshi prediction-market odds and 24h movers, 24 US macro indicators with an economic release calendar, and analytics on the x402 agent economy (service rankings, trends, pricing, and a usage-ranked search for paid APIs). Data refreshe

Enables AI agents to search, license, and pay for rights-clean music per use, returning a verifiable license certificate.

Enables AI agents to spend with the user's own key by paying via USDT TRC-20 and buying Visa/Mastercard prepaid cards, travel eSIMs, and gift cards, and also provides access to policy and how-to documentation.

Deprecated browser-automation MCP server for Venmo, PayPal, and Cash App (withdrawn due to ToS violations, account suspension risk, and credential exposure). Do not use.

Pay-per-use semantic web search for AI agents. Powered by SearxNG, agents pay in sats via Lightning Network micropayments — no API keys required.

Connects AI agents to Bitcoin payment rails with owner-defined spending policies and limits.

A privacy-first MCP server providing 14 offline Brazilian utilities including document validation, boleto parsing, PIX BR Code generation/parsing, and calendar tools.

Lets any MCP-compatible agent shop for catalog items by SKU and quantity under a user-set budget, category and expiry limit. Purchases flow through deterministic server-side pricing, policy checks, single-use approval binding and a recoverable execution state machine, so a compromised or manipulated model cannot move money.

A Model Context Protocol server that enables LLMs to interact with the Lob.com API for address verification and sending physical mail. It provides 76 tools across 12 resource groups including postcards, letters, checks, and templates with built-in safety features for production use.

A drop-in MCP skill that gives AI agents a real on-chain wallet on Pharos — check balances, read live prices, move tokens, pay only when conditions are met, screen for scams, and buy x402 pay-per-use APIs, all from natural language.

Enables AI models to query and compare Brazilian card machine MDR rates and monthly costs across brands and business profiles, including tools for listing brands and tiers, calculating costs, and ranking options.

Enables AI agents to manage financial operations including balance checks, money transfers, invoicing, spending policies, and audit logs through the PayGent API.

Lets coding agents like Claude Code, Cursor, and Codex call MONA Pay directly while developing, so they can create VietQR codes and checkout links, look up incoming transactions, link bank accounts via OTP, and configure or test webhooks (plus email and Zalo notifications) without leaving the editor. It also verifies HMAC-SHA256 webhook signatures offline and generates ready-to-use webhook handler snippets and sandbox transactions for end-to-end payment testing.