"Google's email service" matching MCP connectors:

WafermapA

xyz.wafermap

x402 layer for AI agents: 35 pay-per-call resources, x402 service discovery, USDG/USDC.

MCP catalogue + x402 Doctor. Paid HTTP via x402 (USDC), IETF MPP, or Stripe cards on $1+ routes.

All 26 AgentX paid services as MCP tools — site checks, markets, crypto, email DNS, AI text work.

Receipts-verified reviews of x402 services and paid APIs, before your agent pays.

One gate over 44 paid x402 routes, from ScriptMasterLabs, a service-disabled veteran-owned small business (SDVOSB) in Kinston, NC; buyer pays per call in USDC on Base.

Chainflip Broker as a ServiceA

io.chainflip-broker

Native cross-chain swaps: Bitcoin, Ethereum, Solana, Polkadot, Tron, Arbitrum. Quote, swap, track.

AI Agent Utility Layer for agent safety, web monitoring, crypto research and tool discovery.

Stablecoin escrow payments the buyer can dispute, with a signed receipt. Pay a wallet or an email.

Crypto scam checks (tokens, sites, wallets), chain reads, web page to Markdown, email checks.

Screen global stocks, options, ETFs and crypto in plain English, and set email alerts on any screen.

8-agent research committee, live analysis and scored news on US stocks and crypto, for any agent.

x402 pay-per-call APIs for agents: web search, wallet/token checks, text structuring.

x402 paid on-chain data: token report, contract DD, pool risk, wallet profile, Robinhood Chain.

Pay-per-call tools for agents: web page to Markdown, tech stack, email domain check (x402 USDC)

No-KYC crypto swaps, no account or email. Read-only quotes, coins, swap links, order status.

Ten x402-paid tools for JSON, YAML, cron, diff, text, DNS, WHOIS, GitHub, crypto, and email.

Deterministic finance & quant tools AI agents call and pay for per request over x402 (USDC on Base) — DCF/IRR/XIRR/NPV, LP/GP distribution waterfalls, Black-Scholes pricing & Greeks, bond yield/duration/amortization, portfolio risk, wallet AML screening, and email validation. No API key, no data feed; deterministic, evidence-backed; $0.02–$2.00 USDC per call.

Inspect and validate an x402 endpoint before an autonomous agent spends USDC.

JPYC (JPY stablecoin) EC platform MCP: product search, x402 gasless checkout, order status.

Email verification for AI agents — verify, clean & validate emails; self-onboard + crypto pay