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Generate QR codes and manage dynamic (editable) QR codes with scan analytics over a hosted MCP server (17 tools) and a free REST API

A free MCP server that gives any AI the nine questions every reader asks, 766 verified persuasion techniques extracted from a century of real marketing copy, copy checks and A/B test math. No API key.

Semantic search over 9 free-license stock photo sources. Hosted remote server with OAuth — no API key to paste.

Live scuba dive planning: forecast windows near any place, best-time climatology, marine-life seasons, and facts for 4,800+ dive sites — free, read-only, no auth.

The free SEO and AEO MCP server that turns your Claude / Cursor / ChatGPT Desktop into a senior SEO + AEO consultant. Audits any URL, generates sitemap.xml / llms.txt / robots.txt, finds keyword gaps, and tells your AI exactly what to fix — all using your own AI credits, never ours.

AI-powered property intelligence MCP server. Instant zoning, buildability, ADU eligibility, flood risk, and environmental data for any U.S. address from 20+ government sources. Pay-as-you-go: $5 per successful analysis (prepaid credits). Free Score available at buildability.us. Get a key at https://buildability.us/api. Works with Claude, Grok, Cursor, and any MCP client.

Facebook & Instagram data for AI agents — pages, posts, groups, Ads Library, Marketplace, profiles and reels. 47 read-only tools, structured output. Free tier: 200 calls/month.

Splice provides discovery and ideation tools for music creators using its catalog of royalty-free samples. Its MCP server helps assistants search sounds with natural language and build stacks of complementary sounds for new projects.

Royalty-Free Music

Hosted MCP that hands a coding agent the ecommerce conversion mechanics: quantity breaks, free-shipping threshold, order bump and sticky add-to-cart, with the EU rules attached.

Fact-check any claim with live web sources. Ed25519-signed receipts. Catches hallucinations. One MCP tool: verify_claim. $0.02 per check, free trial.

A free URL shortener

Free UK Construction Industry Scheme (CIS) calculators for contractors: deductions, gross-up, tax month deadlines, late filing penalties, gross payment test and verification. No sign-in.

Free MCP server providing network diagnostic tools: IP geolocation lookup, DNS lookup, and IPv6 connectivity check. Published on NPM as 17nas-mcp-server.

Free trial available. Get 500MB test traffic upon registration, with integration completed in 5 minutes. We offer dynamic residential proxies, long-term ISP proxies and premium ISP proxies, covering over 200 countries and regions worldwide with more than 90 million residential IPs. Suitable for web crawling, cross-border multi-account management, SEO monitoring and other scenarios.

Free company data for AI agents: company profiles, tech stacks with evidence and first/last-seen dates, email formats and recent tool switches for any business website. Hosted remote server, no sign-in, no card.

Free directory of AI agent services: search MCP servers and x402 services, see how to connect and pay, prepare output verification, and list your own. No authentication.

Free hostnames for the sites your AI agents build: claim a name under makes.fyi or agentdomains.co with one CLI command, add A/AAAA/CNAME/TXT records, forwards, or a reverse proxy with HTTPS. Also ships an MCP server.

Free capability resolver for AI agents. Discovers and compares tools, APIs, MCP servers, and x402 machine services through a no-auth remote MCP endpoint.

Free, persistent message board for AI agents. Share a common room, create private threads, search messages and coordinate across sessions using six MCP tools or HTTP. Open registration; Streamable HTTP with agent credentials.

Free social platform for AI agents - boards for solutions, questions, and drama where every post is anchored to its tool-call receipt.

Free, read-only remote MCP server (no auth) over the AgentTask Atlas catalog: MCP servers and Agent Skills organized by dev task, each with a one-line practical verdict, install command, credentials and source link. Tools: search_catalog, get_entry, list_categories.

Free, keyless real-time air quality (US AQI, PM2.5, PM10, ozone, NO2, SO2, CO) for any city.

free webpages

Free AI readiness scan for any website. Paid reports for agents are coming soon.

Free local MCP server for Apple Mail, Calendar, and Reminders on macOS.

Free, no sign-in MCP: can AI agents reach checkout at a store? Try "Use ARC to check allbirds.com"

Free crypto intelligence for AI agents: instant rug/scam scans for any Solana or EVM token, verified whale flows, and AI agent signals with a public accuracy record. Remote server, no API key.

Free, sourced money facts and scheme lookups for US/UK/CA/AU/NZ. Every answer cites bankrolled.com.