"Free tools or resources that do not require an API" matching MCP connectors:

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

Live internet-censorship signals and tamper-evident, pre-registered, hash-chained AI model evals.

Live exit costs by venue, depth concentration, and a sealed calls record that keeps its misses.

500+ pay-per-call tools + skill packs. USDC + USDG on 12 chains, or free via proof-of-work.

Bank and lender failure early warning, with the validated record served beside every claim.

Host-owned vacation-rental direct booking via VRP. Signed offers, 0% commission. Not an OTA.

Free Vedic astrology: panchang, kundali, transits, matching, doshas, eclipses, numerology

Savvly MCP: query fund data, model projections, and compare against alternative retirement products.

Scan code for quantum-vulnerable cryptography and get NIST post-quantum migration guidance.

Hosted MCP memory: save sessions/decisions once, search from Claude, Cursor, ChatGPT. EU-hosted FTS.

APILayer MCP Adapter turns APILayer's REST APIs into Model Context Protocol tools so any MCP-compatible client can call them directly in conversation. The first release ships ipstack IP geolocation and security lookups (single IP, caller's IP, and bulk). Additional APILayer services are added by registering them in a single config file, so the catalog grows without client-side changes.

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

Read-only breach intel, full history 2007-today: reports THAT an org was breached, never the data.

AMZScout Skill + MCP gives AI agents live access to real Amazon marketplace data across 14 Amazon marketplaces. Analyze any ASIN, validate product ideas, research niches, compare competitors, discover profitable keywords, and build data-driven PPC strategies using trusted Amazon insights instead of AI assumptions. Works with Claude, ChatGPT, Cursor, and any other MCP-compatible AI client. To connect, you'll need an AMZScout API plan and authorize your account. Get access and view pricing here: https://learn.amzscout.net/amazon-product-api-for-ai-agents

Funding stress early warning for US money markets from free public data, with an honest backtest.

Check if a task runs locally vs cloud. Save money on calls that don't need cloud inference.

Classify data safety before storing or sharing. GDPR, HIPAA, PCI-DSS, CCPA. AI-powered.

Read-only Amazon SES observability: search events, inspect bounces, pull delivery stats.

530 MCP tools across 561 fintech tools: ChainGraph AP2 decisions, execution_hash. Zero PII.

SSRF-safe web intelligence: 4 outcomes, 32 paid x402 tools, 3 free tools and a URL preview.