"Services or tools that don't require a separate API key" matching MCP connectors:

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

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

Exit-cost estimates, depth concentration, liquidity tiers, and sealed records; no commodity futures.

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

SSRF-safe web intelligence: 4 outcomes, 43 paid x402 tools, 3 free tools and a URL preview.

US funding-stress warning with construction-PIT evidence limits and explicit eligibility flags.

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

Diagnoses, drugs & lab codes: ICD-11, SNOMED, LOINC, RxNorm, MeSH, ATC, CID-10. 37 tools, MIT.

Bank and lender monitoring with historical-evidence limits and eligibility flags beside every claim.

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

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

Plain-English git via MCP: 22 tools to branch, commit, push, and tag. No git jargon.

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

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

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

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.

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

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.