"A system for building an autonomous second brain" matching MCP servers:

A thin stdio client that proxies to the Second Eyes API, enabling wallet-equipped agents to pay via x402 and receive deterministic verdicts.

A local MCP server that helps the Payments team by querying microservice specs, payment flows, triaging CS tickets with GCP analysis, and calling Stark Bank APIs in development/sandbox environments.

Enables AI agents to autonomously issue single-use, merchant-locked virtual Visa cards and execute payments across supported merchants through the Model Context Protocol, with human-in-the-loop approval.

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 AI agents with a wallet and autonomous payment capabilities using stablecoins, enabling seamless micropayments and financial operations with under 5-second settlement on Hedera.

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.

A template for building MCP servers with a built-in paywall gate that offers free local execution and premium server-side execution via Stripe and x402 payment lanes.

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.

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

Unofficial MCP server for Oblio.eu accounting software enabling natural language interaction to create invoices, manage documents, collect payments, query nomenclatures, and submit e-Factura to Romania's SPV system.

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

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

A single MCP gateway for Allternit LLC business operations, providing tools for Stripe invoicing, Cloudflare Pages deployment, brain document search, and client folder creation, all with safety confirmations for destructive actions.

Enables building client statements of account from existing invoices, credit notes, and deposits, with aged outstanding balances, PDF/plain-text output, and drafted payment chasers at friendly, firm, or final levels.

MCP server for MeroShare, enabling AI tools to manage IPO/FPO applications, portfolio, and share transactions in Nepal's online share system.

MCP server for Factura.uz electronic invoicing system (Uzbekistan). Supports creating, signing, accepting, and rejecting e-invoices, plus company and product lookups.

An MCP server for Danish accounting via Billy.dk API, enabling natural-language control over invoices, bank lines, reports, and more, with a write-guard for safety.

Enables autonomous AI agents to execute onchain transactions, settle HTTP 402 micro-payments, and verify cryptographic execution receipts through KeeperHub with built-in safety caps.

A Python MCP server that connects to an Inventory Management System, providing 15 tools for CRUD operations on users, inventory items, and bills.