"Google's email service" matching MCP connectors:
GET /v1/connectors — MCP directory API referenceMatching Connector Tools:
Issue and manage Brazilian service invoices (NFS-e) by chatting with your agent, platform-hosted, no
Send a fax in Australia (+61). Pay only if it delivers. Email receipt. No card at send.
Pay-per-call APIs and MCP services for agents, no accounts or keys, with verifiable receipts.
Inspect and validate an x402 endpoint before an autonomous agent spends USDC.
Prepaid email-verify credits for MCP agents via Stripe Link.
Which x402 service actually works: uptime, valid 402, and settlements proven on-chain.
Deterministic Canadian mortgage calculations for qualification, debt service, LTV, and penalties.
Tollbooth Authority — Certified Purchase Order Service for DPYC operators
Roastify Developer API MCP Service — Tollbooth DPYC monetization
Machine-service catalogue, payment hand-off and free market discovery for autonomous AI agents.
AI news, model pricing, service status, and machine-payable premium tools. AFTA-certified.
Pay-per-call x402 gateway: agent tools, OpenAI-compatible LLM, market data, RPC, security audits.
Bi-temporal memory-as-a-service and paid agent labor. Pay-per-call USDC via x402; signed receipts.
Search travel eSIM plans for 150+ countries and buy via Stripe link; eSIM QR delivered by email.
54 pay-per-call AI services over x402 (USDC on Base): compression, OCR, FX, inference.
Bounded data, document, web-quality, and operations services purchased with USDC through x402.
Verify x402 endpoints before payment or publish service profiles for agent discovery.
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.
Scheduling, availability, clients, billing and CRM for appointment-based services.
Workflow diagnostics, capability routing, and x402 settlement for MCP-compatible agents.
