"Gmail automation tool or service" matching MCP connectors:

Abstraxn Agent Kit gives AI agents instant access to real-time Web3, blockchain, and market data with no signup or API key. Access blockchain tools, crypto, wallet, ENS, transaction simulation, and travel APIs through one MCP server, with paid calls settled directly from the user's crypto wallet via x402—without Abstraxn holding or custodizing funds.

Exit-cost estimates, depth concentration, liquidity tiers, and sealed records; no commodity futures.

Pre-transaction token risk checks for autonomous agents. Read-only; never signs or moves funds. Paid per call in USDC via x402. Supporting Base, Solana, Ethereum, Arbitrum, BSC and HyperEVM

Pay-per-call safety checks for AI agents: screen a crypto address or URL before you transact.

Universal pay-per-call tool API for AI agents. Web search, price feeds, hive memory, LLM routing, code sandbox. Free tier (10 calls/day, no signup). x402 payments on Base + Solana.

Monetization gateway for MCP servers. Agents call a tool, receive an x402 v2 payment challenge, sign a USDC transfer on Base, and get the result. Payment is verified before the tool runs and settled only after it returns, so failed calls are never charged. Discovery and tool listing are free.

Monetize any MCP server: x402 paywall, pay-per-call billing in USDC on Base, agent marketplace.

Rug-check & launch radar for trading agents: composite honeypot score, EVM+Solana, keyless x402.

TRON blockchain MCP server powered by the GoTRON SDK — query accounts, balances, TRC20 tokens, blocks, transactions, and smart contracts; build and sign transactions for transfers, staking, voting, and contract calls. Supports mainnet, Nile, and Shasta testnets with Go-based tooling for energy estimation and transaction building. Available via stdio or hosted Streamable HTTP

Paid work for agents: claim verifier-checked jobs, submit, earn USDC. Some need no bond or funding.

Screen an Ethereum address or ENS name for on-chain reputation risk, sanctions, and reasoning.

The stock market, in SQL — scan, replay, or subscribe across ~12k US tickers and top 100 cryptos.

40+ Lightning-paid AI tools for agents: calls, SMS, fax, voice, translation. No signup, no keys.

Check a Base contract, transaction or web page before you act. Free pricing, paid per call in USDC.

Pay-per-call agent tools via x402 (USDC on Base): chat, prices, funding, RNG. No account or keys.

Korean crypto + news (kpop/semi), 17 tools, signed receipts. x402 Base+Polygon+Solana.

Bounded data, document, web-quality, and operations services purchased with USDC through x402.

63 pay-per-call tools for agents: vision, text, data, web, blockchain. USDC on Base via x402.

Rent verified subdomains by the hour, day, or month. Free 24h trials, x402 USDC on Base.

Read-only MCP for Rialto quotes and swap preflight on Robinhood Chain. No signing or broadcast.