"Services or tools available for free without requiring an API key" matching MCP connectors:
GET /v1/connectors — MCP directory API referenceMatching Connector Tools:
Company & brand data by domain or ticker/ISIN: industry, headcount, HQ, social, colors, logos.
Remote shell and detached long-running jobs on your own machines — no SSH, open ports or VPN.
Self-hostable team wiki; agents read & write it via MCP; Atlas turns your repo into a cited wiki.
MCP-native open-source Notion alternative: read & write pages, databases and kanban boards.
Read, search, send, organize, draft and schedule email across your inboxes from any MCP client.
Sales intelligence for B2B SMEs — lead scoring, ICP fit, CRM enrichment & writeback.
Austria's official company register (Firmenbuch) – master data, financials & ratios for AI agents.
DMARC analytics and domain onboarding for AI assistants — health, SPF/DKIM, compliance, anomalies.
Generate images, video & speech with Nano Banana, Veo, Omni and Gemini TTS. Pay as you go.
Live data-center, power-grid, interconnection-queue, fiber and natural-gas infrastructure intelligence for AI agents — query it and cite it. Streamable HTTP at https://dchub.cloud/mcp. Free tier, no signup. Every full-data response carries a CC-BY-4.0 attribution line and an as_of stamp. Coverage counts and their definitions are served, not stated here: /api/v1/canon/phrases for current quantities, /api/v1/ops/deadman for per-source ingest freshness, and dchub.cloud/bind for the integration contract. The DC Hub Gas Index (DCGI) was withdrawn 2026-08-08 rather than published wrong; live gas data remains via get_gas_intelligence.
Project management, CRM, time tracking and project economy for consulting and engineering firms
Polish law: search statutes (ISAP), court rulings, verify citations. Free tier + paid plans + x402.
Operate smplkit from your agent: feature flags, config, logging, audit, and scheduled jobs.
Project portfolio management for PMOs. Alternative to Microsoft Project Online. OAuth + PAT.
Millions of dated buying and momentum signals: who raised, who's hiring, what changed and when
Multi-carrier shipping for AI agents: compare rates, buy labels, track packages, validate addresses
63 tools for Apple Health, Fitbit, Oura & Health Connect data in Claude, ChatGPT, Grok & Mistral.
IPStack MCP Adapter turns IPStack'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.
Loads your personal writing voice into any AI and scores how closely a draft matches it.
DocForge turns documents into structured data. Upload a PDF, image, or Office file and get fielded JSON back with per-field confidence scores. 95 templates (invoices, receipts, bank statements, ID docs), custom JSON Schema mode, auto-detect, natural-language instructions. Keyless demo tool included. Free 7-day trial.
