"F#" matching MCP servers:

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.

Enables AI agents to search marketplace listings, place escrow-protected purchases paid in Nano, track orders, and retrieve signed receipts.

Enables AI agents to scan payment endpoints for safety, returning a letter grade (A–F) and verdict before authorizing payments.

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 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.

Enables interaction with the Gumroad v2 API, providing access to all 105 seller operations such as products, sales, payouts, subscribers, email campaigns, licence keys, and webhooks.

Model Context Protocol (MCP) server for French Electronic Invoicing (NF XP Z12-013). Provide tools to validate, generate, and explore API specifications for PDP/OD interoperability.

Enables AI agents to issue, void, query, and manage Taiwan e-invoices via 27 MCP tools, wrapping the Universal EC POS Web Service.

An MCP server that exposes tools for Taiwan's ezPay e-invoice lifecycle, enabling AI assistants to issue, void, and query invoices and allowances through the standard MCP protocol.

Enables read-only consultation of electronic service invoices (NFS-e) from São Paulo city hall via an official source, using a single tool and pay-per-use credits.

Enables agents to query whether a WordPress plugin, npm package, or PyPI project looks abandoned, returning a live abandonment-risk score, status, and the registry signals behind it, plus raw registry, GitHub, and version history detail. Calls are paid per request in USDC via x402, with free discovery and source-listing tools.

Enables AI assistants to create checkout sessions, list products, retrieve orders, and process refunds for Waffo Pancake payments through natural language commands.

Provides AI assistants with access to PurelyMail's email management API, enabling user, domain, routing, and billing management through natural language.

An MCP server for autonomous AI agents to discover, pay for, and rate paid APIs on Casper with policy-controlled approvals and on-chain reputation.

Enables querying issued electronic service invoices (NFS-e) from the Brazilian Federal Revenue via natural language, providing read-only access to official invoice data.

Enables querying official electronic service invoices (NFS-e) from the Cuiabá city government in Brazil, providing read-only access to official data.

Enables AI assistants to manage products, shopping carts, and orders in an online store through a well-defined MCP API.

Enables MCP clients to convert amounts between currencies using live ECB daily reference rates and to validate IBAN structure and checksum.

Enables issuing, consulting, and listing Brazilian NFS-e invoices through Spedy's API over an authenticated HTTP endpoint.

An experimental MCP server that lets AI agents interact with guarded payment workflows through typed tools, enabling safe agent-assisted payments with M-Pesa and mock Airtel Money.