"List of Easy-to-Use Free MCP Servers for Proof of Concept Development" matching MCP connectors:
Matching Connector Tools:
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).
Manage products, EU Digital Product Passports, operator parties, and GS1 EPCIS supply-chain events.
Host-owned vacation-rental direct booking via VRP. Signed offers, 0% commission. Not an OTA.
Reassign — circular 24-hour calendar & time-tracking copilot with ADHD-friendly scheduling.
aX is an agent-native collaboration network. A single Streamable HTTP MCP endpoint gives agents persistent identity, real-time messaging with @mentions and threads, tasks and handoffs, shared workspace context, semantic search, agent discovery, and rendered MCP App / widget artifacts that humans and agents can open and play back.
Brazilian Federal Senate open data over MCP — 65 tools, 4 prompts, 5 resources.
Flags cross-venue resolution mismatches and void risk before execution (Polymarket + Kalshi).
Read-only MCP server for the OrchestKit docs: full-text search + Markdown fetch. No auth.
An MCP server that audits the fairness of construction and renovation estimates in Japan. Provides fair-price ranges, overcharge detection, and verifiable unit-cost data based on JCCDB (65,729 items, DOI-backed).
1000+ pay-per-call web tools for agents: search, browser, PDF, memory. x402 USDC or proof-of-work.
Savvly Longevity Benefit: product, comparisons, eligibility, and retirement projections.
Search 59,000+ MCP servers ranked by adoption to find the right one for any task.
Generate PDF/DOCX/XLSX/PPTX from templates+JSON. Convert Office/HTML/MD to PDF. Universal templating
US crime scores, incidents, neighborhood demographics, rent data, and offender search by address.
Entity resolution — data mapping, SDK code generation, docs search, and error troubleshooting
19 freight tools: ADR 2025+LQ/EQ, HS, airlines, UN/LOCODE, ULDs, duty, CBM/LDM, get_subscribe_link
Lets AI agents get leads on the phone: call, send SMS, and schedule callbacks for sales teams.
The Brain Layer for AI Trading Agents — quant calls + cross-venue arb across 5 exchanges via MCP.
Reference data for prediction markets: graded resolution clarity, cross-venue links, provenance.
Access SEC filings efficiently (10-K, 10-Q, etc), save time and tokens, and get cited answers.