"National Rail" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Send a USPS Certified Mail letter to any US address from ChatGPT, Claude or Grok. The assistant prepares the letter and hands back a review link; a person reads it, checks the recipient, pays and authorizes. Nothing is printed, mailed or charged without that approval. $16.17 with the electronic return receipt, $13.18 without. No subscription, and no account needed to see a price. Docs: https://piloxa.com/send-a-certified-letter-online
Tesouro em Foco is a free remote MCP server that brings Brazilian government bond (Tesouro Direto) pricing into AI assistants such as Claude, Cursor, and any MCP-compatible client. The engine implements the Brazilian National Treasury's official pricing methodology — validated against 269,000+ real trades — and covers all retail bond types: fixed-rate (LTN, NTN-F), inflation-linked (NTN-B Principal, NTN-B), and retirement/education bonds (Renda+ and Educa+, NTN-B1).
Rattlesnakes By Mail is a public record of dated, sourced claims about AI crawlers and AI agents, including GPTBot, ClaudeBot, PerplexityBot, Googlebot, and Applebot. Each claim carries a verbatim quote from vendor documentation, a publication date, and an evidence URL. Five MCP tools cover crawler lookup, user agent identification, change history since a given date, free-text question matching against published claims, and token-gated correction notes.
The official Model Context Protocol (MCP) server for EU Fund Portal — connecting AI agents directly to the most comprehensive structured feed of European grants, tenders, and public capital allocation. Access 60,000+ live European funding opportunities across 31 countries, covering centrally managed EU programmes (Horizon Europe, EIC Accelerator, European Defence Fund, LIFE, Digital Europe) alongside national funding bodies across 32 jurisdictions.
The company registry MCP: brreg orgnr, Companies House, Bolagsverket organisationsnummer.
AI-native stablecoin settlement rail replacing SWIFT for institutional cross-border payments. 14 tools covering settlement quotes, execution, ESG scoring, oracle status, fee verification, competitor comparison, rail health, investment context, and MPP-gated macro intelligence. Settles via Base mainnet USDC at ~1.385% all-in.
Checks if an LEI-holding entity has a match in the national registry its jurisdiction expects.
Free, no key: search 10M+ government tenders, RFPs and grants from 60 national procurement sources.
Search and compare 26,000+ UK electronics products across multiple retailers including AO. Get real-time prices, stock availability, and price comparison across retailers in a single search. Covers laptops, phones, tablets, headphones, TVs, monitors, cameras, gaming, and more.
Print and mail physical letters and postcards to US postal addresses, plus address verification. Upload PDF/HTML/Markdown/text/DOCX/image documents, get a quote, and pay per call with x402 USDC on Base mainnet or credit card. Supports certified/registered mail with proof of delivery and mail-merge templates.
Global population estimates from WorldPop, 2000-2030, at country and sub-national levels.
Machine-readable taxonomy of 100+ AI system failure modes spanning factuality, alignment, planning, code generation, and instruction following.
PhoboMail gives AI agents their own @phobomail.com email address with zero human involvement. Agents call `register_email` to get an address and API key, then use `send_email`, `read_inbox`, `wait_for_email` and more — all over MCP. Ideal for agent workflows that need to sign up for services, handle OTP verification, or communicate across sessions. Hosted on Cloudflare.
Cultural color and colour intelligence API. Every colour anchored to a named person, a documented year, and a consequence. 34 archives spanning literary, cultural, pigment, and national traditions. Ask it what color could get you executed in the Ottoman Empire.
Ephemeral mailboxes and a mock OAuth IdP for testing email and auth flows — 39 API-driven tools covering mailboxes, mails, attachments, domains, teams, and mock identities.
Nutrition for 910 plant foods across 11 national datasets, plus GB/EU & US claim checking
19 deterministic validation tools for AI agents: IBAN, SWIFT/BIC, LEI, VAT, ABA routing, IFSC, ABN, Luhn, ISBN, E.164, SEDOL and company-number checks, plus rental due-diligence and batch/vendor-onboarding packs. Pay-per-call via x402 (gasless EIP-3009 USDC on Base); 20 free calls/day, no API key.
Deterministic banking, LEI, VAT, SWIFT & compliance checks via MCP with signed XDR-1 receipts.
Query US Treasury national debt, interest rates, exchange rates, and fiscal datasets via MCP.
Multi-rail settlement binder MCP. binder_verify proves integrity only — not settlement.
