MCP servers for ChatGPT

Tested financial & practical calculators as free, no-auth MCP tools for AI agents.

Brazilian labor calculation for AI: update labor claims and awards with official correction and interest.

Calendar quarter 1-4 band

Hosted Google Calendar MCP server for AI agents. No self-hosting or Google Cloud setup.

Manage Google, Outlook & Apple calendars and create private sync rules from chat.

Certified SEC EDGAR fact memory for AI agents with zero hallucination and filing provenance.

Turn a written schedule into a live calendar link people subscribe to in Apple, Google, Outlook.

Route tasks by measured judgment quality: third-party-verified, Brier-based calibration records.

Would you make the shortlist? Score a job against your CV: fit, gaps, ATS score, likely questions.

Geometry and CAD file metadata extraction for STL, OBJ, PLY, PCD, LAS/LAZ, glTF/GLB.

Public holidays for 150+ countries, business-day maths and timezone lookup

API for AI agents to delegate tasks to real humans.

Concert booking intelligence: run and read Promoter Briefs from Claude or ChatGPT.

Let your agent call businesses for you: quotes, reservations, cancellations, waiting on hold.

Manage CallKaro voice agents, phone numbers, call queues, and place single or batch AI calls.

Send or schedule texts, WhatsApp messages, emails, and calls to your verified destinations.

AI agents use CalmBoard MCP to access board data, tasks, insights, and project workflows.

Manage tasks, Focus Zone, notes, projects, and task history from compatible AI assistants.

SEO MCP server for keyword research, SERP analysis, audits, and Search Console workflows.

Connect AI agents to shared product marketing intelligence in Calven.

Read-only CalvingWatch product, tester, camera, privacy and safety facts; no customer data.