"Exploring RAG through defined workspaces" 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.

Authenticated hosted Streamable HTTP MCP server for crypto data routing through PubFi capability and gateway tools.

AI inference via MCP — pay per request with Solana USDC through x402. No API keys.

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

Run crypto trading strategy backtests through EmidLabs's Backtesting API.

Delegare provides secure payments for AI agents. Google AP2-powered payment authorization for AI agents. Issue scoped spending mandates with hard limits, merchant controls, and no exposure of card credentials or private keys. Agents pay across dual rails: cards and ACH via Stripe, or USDC and USDT on Coinbase Base. Supports paid API access and x402-protected requests through MCP.

Production-ready TronSave MCP server focused on helping agents and clients buy and sell TRON resource quickly through one unified interface, with fast order execution, pricing/estimation tools, and secure session-based workflows.

Korean crypto × AI media MCP — channel stance, daily briefs, RAG, canonical store, AI personas.

Testnet TronSave MCP server focused on helping agents and clients buy and sell TRON resource quickly through one unified interface, with fast order execution, pricing/estimation tools, and secure session-based workflows.

Live cached Solana decisions and delta feeds purchasable by AI agents through x402.

Search recorded crypto and TradFi microstructure through deterministic, reproducible agent tools.

Policy-gated MCP treasury for AI agents. Subscribe via x402 (POST /api/mcp/onboard, USDC on Base), then call 50+ tools for wallets, allowlisted transfers, swaps, bridges, yield, cosigners, and payment requests. Every money-moving action goes through policy checks and explicit confirmation, no raw private keys. Docs: https://fortfiapp.com/agents

Live and historical Polymarket prediction-market orderbook data — plus Hyperliquid perpetual-futures orderbooks — for any MCP-capable AI agent. 12 tools and 2 resources covering market discovery, live order books, time-series snapshots, multi-day summaries, and pipeline health. Tier-aware: the same endpoint serves free (BTC, 24h history) through Enterprise (all categories, unlimited history) automatically based on the API key.