"DuckDuckGo Search Engine" matching MCP connectors:

Tesouro em Foco is a free remote MCP server that brings Brazilian government bond (Tesouro Direto) pricing into AI assistants such as Claude, Cursor, and any MCP-compatible client. The engine implements the Brazilian National Treasury's official pricing methodology — validated against 269,000+ real trades — and covers all retail bond types: fixed-rate (LTN, NTN-F), inflation-linked (NTN-B Principal, NTN-B), and retirement/education bonds (Renda+ and Educa+, NTN-B1).

A quant-factor brain for your AI — factor scores, similarity search, and risk-coherence analogues for 14,684 tickers across 6 asset classes

Search 900+ crowdfunding and P2P lending platforms, market data and regulation by country.

Deterministic market-state engine for trading agents — state, gate, coordinates, with receipts.

Used & imported cars in Portugal: search stock, ISV/IUC tax calc, resale value, contact.

Search AliExpress with real prices, live promo codes and the true post-cashback cost.

Deterministic cross-border tax engine: PE, GAAR, Indian TP, rule-level lookup. Compiled law, no LLM.

Search evidence-backed freebies, rebates, benefits, public programs, and free tools.

Search and vet SEC-registered financial advisors: profiles, disclosures, firm fees, credentials.

Deep purchase intelligence for agents and apps: live prices, landed cost, trust scores. Free.

Travel award search: compare cash vs points on hotels, flights & cars, cents-per-point, and book.

Auditable US clean-energy tax-credit scenarios for 45Q, 45V, 45Y, 48E, and 45X.

Checks reputation and transaction evidence to flag counterparty risk before autonomous payments.

Official-source China bank card offer facts for agents; free bank list and paid factual search.

Search expert emerging-markets research on economics, politics, policy and sovereign risk.

x402-paid tools: EU company & sanctions data, web search, LLM chat, crypto intel, x402 monitoring.

R_net LP risk evaluator for DeFAI agents. IL + Breakeven Corridor O(1). L402 Lightning paywall.

MCP server exposing the Backtest360 engine API as tools for AI agents.

Real-time DEX and on-chain data across 36 blockchains: liquidity pools, token prices, OHLCV, transactions, and cross-chain search. 17 keyless tools.

Search, compare and estimate rewards across US credit cards. Verified fees, APRs and bonuses.