"A tool for executing code in Jupyter Notebooks" matching MCP connectors:

Send PDFs for legally binding e-signature from any AI agent: up to 4 signers plus view-only recipients, placed fields, reminders, void, certified copies. Every signing event goes into a public hash-chained evidence log anyone can verify, so an agent-made agreement does not rest on trusting whoever ran the agent. 100 documents a month free, no card; then prepaid per document. Sign in with OAuth or use an API key. Docs: signathing.com/developers

A planner that keeps itself, with memory across AI agents. Nuto gives AI agents one schedule and shared long-term memory to recall context, record decisions and progress, and schedule follow-ups; connect through remote MCP with browser OAuth. Free to start.

AEO grader: deep site scan with ready-to-paste fixes, plus a 10-engine AI visibility report (x402).

Executable skill packages for agents: vetted competence, ready to run, not just documents.

Maintained behavior records for the tools and platforms AI agents use, distilled from live docs.

Discovery for the agent ecosystem: findable businesses, tools, knowledge, agent spaces, skills.

Read-only search of 2,189 AI agent tools (MCP servers, x402 APIs) with daily automated trust scores.

Manage incidents, alerts, monitors, status pages, on-call and telemetry in OneUptime.

Your Apple Health data, food diary and lifts, for ChatGPT, Claude and Gemini. Approved on iPhone.

Quote and order followers, views, likes and members for any public link, with spend caps.

Find Costa Rica services, providers, classes and events; check availability and prepare bookings.

Valmiki Ramayana verses: lookup, search and verse-of-the-day in 4 languages