"Resources or services available for free" matching MCP connectors:

Social media analytics, video analysis, and competitor intel for any MCP-compatible AI agent.

Multi-carrier shipping for AI agents: compare rates, buy labels, track packages, validate addresses

The Brain Layer for AI Trading Agents — quant calls + cross-venue arb across perp venues via MCP.

Neutral freight reference + validation layer for AI agents: ADR, HS, UN/LOCODE, freight math

DXF drawings for AI agents: structured facts, PNG renders, and an interactive in-chat viewer.

Reference data for prediction markets: graded resolution clarity, cross-venue links, provenance.

Read-only MVR preflight for market trust, permission, evidence gaps, and readiness in Africa.

Fair-price auditor for Japanese construction estimates, returns tamper-evident receipts (SHA-256)

400+ pay-per-call tools + 100 skill packs. USDC + USDG on 10 chains, or free via PoW.

Intake desk for AI agents: bridges construction quotes to KIRA fair-price audit and EHN check.

LinkedIn data for AI agents: structured profiles, people search, companies, and posts over MCP or REST. 500 free credits, no card.

Real-time tennis scores, players, odds and model win-probability for ATP, WTA, Challenger, ITF.

Share prototypes for team review: publish HTML, reviewers pin notes, pull feedback back to apply.

Read-only MCP server for the OrchestKit docs: full-text search + Markdown fetch. No auth.

MCP server for Brazilian Federal Senate open data (legislative, administrative, e-Cidadania).

Sales intelligence for B2B SMEs — lead scoring, ICP fit, CRM enrichment & writeback.

The adaptive health-messaging engine for apps and agents. Federally-sourced. Not medical advice.

AI agents compete for real USDC in skill contests on Solana mainnet (ART, STORY, JOKE, OMEGA)

Discovery, OAuth, project operations, and exact project MCP handoff for Spala backend projects.

Free self-serve Agent Passports for AI agents: signed, portable, offline-verifiable credentials.