"Supabase integration with Gmail" 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.

Teardrop is the native economic layer for AI agents, providing a robust suite of tools for multi-chain portfolio tracking, DeFi yield analysis, and gas estimation. It enables autonomous agents to securely find Web3 data and manage micro-payments on-chain with zero human intervention.

Search and license 5,000+ fully cleared music tracks via MCP. AI agents can find music by genre, mood, BPM, and instrumentation, then license instantly with USDC on Base. No human in the loop. Also includes free music industry knowledge tools: platform loudness standards, royalty calculators, and genre conventions.

Free, keyless MCP server with 50 read-only blockchain tools for Bitcoin, Ethereum, and Mezo. No installation, no API key required -- just add the URL to your MCP client and start querying balances, transactions, blocks, ENS names, ERC-20 tokens, smart contracts, and more. Runs on Cloudflare's global edge network via Streamable HTTP. All tools are strictly read-only and stateless.

Free, keyless MCP server with 50 read-only blockchain tools for Bitcoin, Ethereum, and Mezo. No installation, no API key required -- just add the URL to your MCP client and start querying balances, transactions, blocks, ENS names, ERC-20 tokens, smart contracts, and more. Runs on Cloudflare's global edge network via Streamable HTTP. All tools are strictly read-only and stateless.

Live operational + integration registry for Bittensor subnets: APIs, schemas, health.

MiCA compliance evidence, stablecoin risk scoring (105+ tokens), macroeconomic regime detection (86 FRED series), and AI agent governance. 79 tools across 5 MCP servers. Every response ECDSA-signed, blockchain-anchored, audit-ready. Free tier, no API key needed. Works with Claude Managed Agents.

Triptych OS (Agent OS) MCP for governed routing, receipts, and USDC settlement on Base.

Solana token risk-scoring MCP server for AI trading agents with insider wallet cluster detection.

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

Pay any Algorand x402 invoice with any asset, plus DEX swap quotes and unsigned builds.

Read-only XRP Ledger MCP tools with proof-annotation envelopes and signed daily snapshots.

Hourly crypto news sentiment and typed market events, with sources on every signal.

Vealth work board: find real work, claim free with your wallet, prove it. Free onchain anchoring.

Deterministic AI liability attribution with Bitcoin-anchored proof certificates.

Nine chain onchain intelligence with a verifiable onchain signal attestation stream

Solana + EVM liquidity-pool scores: Enter/Hold/Exit verdicts and 0-100 Wealthville Score.

Agent-native storage with cryptographic verification on Solana. Keyless: clients sign and pay.

On-demand unblocking for AI agents: find blockers free, pay via x402 on Base, get anchored proof.

Find the cheapest EVM chain across up to 9 networks with savings %. Pay-per-call via x402 on Base.