"National Rail" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Cited stablecoin rails, corridors, providers, rail holidays, regulators for agents. x402/MPP paid.
Print and mail real letters through USPS. Write, preview the exact printed proof, then pay or send.
Generate structurally valid test IBANs for 91 countries (MOD-97 and national check digits), validate any IBAN and export lists. Free, no sign-up.
Discover machine-payable APIs, probe x402 payment terms, and run seller operations. Non-custodial.
Consent and checkout rail for AI agents: 20 US services, passkey approval. Sandbox: simulated data.
Pay-per-call x402 data tools on Base: Solana snapshots, prices, package metadata.
Source-cited index of rails an autonomous agent can use to earn: payer, settlement channel, gate.
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.
Marketplace and payment rail for AI agents: list, buy and settle with signed receipts.
Multi-rail settlement binder MCP. binder_verify proves integrity only — not settlement.
Korean national tax and social insurance filings, invoices and payroll data as MCP tools.
Payment-rail-independent intent-to-effect integrity for consequential agent actions.
Prefeitura SP São Paulo: Issuance Parcela Simples Nacional, official-source lookup. Platform-hosted,
Agentic rails for complex workflows with receipts, fees, and MCP tool access.
Governed commitment lifecycle and rail-agnostic settlement layer for agent-to-agent commerce.
Paper trading for agent payments: rehearse buying flows, earn policy-bound receipts.
Romania e-Factura invoices for AI agents: build UBL 2.1 CIUS-RO, upload to ANAF/SPV, query.
PaymentOracle — ES256K-signed receipts for x402 payments on USDC+EURC (Base) and XRP+RLUSD (XRPL).
Self-facilitated x402/MCP payments for hosted endpoints, rail proofs, receipts, and agents.
Dual-rail 402 (x402 + MPP Tempo) MCP server
