MCP servers for ChatGPT

Vietnam stocks, foreign/proprietary flows, macro, ETF flows, forex, crypto. Read-only, cited.

Pre-call research briefs for sales calls: set up Hog, book briefs and read them from your agent.

Hogsheads to liters, number discarded

U.S. federal holidays with observed dates and business-day math. Example from an open-source kit.

Holiday Pay Calculator NZ: the site's own MCP server — calculator, enquiry (enquiry = a human...

Holiday photo MCP server: list and fetch personal holiday photos inline in Claude chat.

Searchable directory of Airbnb listings — discover properties and retrieve direct Airbnb links.

Free, keyless public holidays lookup for any country and year, plus single-date holiday checks.

Hollerdex: a domain's public emails, phones and social profiles as one ranked contact card.

Find open models and get download links with the SHA-256 each file must have.

AI visibility audits, llms.txt and schema generators, instant quotes, missed-call and ROI tools.

34 read-only Canadian mortgage, tax and home-buying tools, including nationwide LTT coverage.

Homechecker's professionally authored Australian homebuyer guides: search, cite, build checklists.

Home cleaning and aircon servicing in Singapore: coverage, open times, exact prices and booking.

Query Honeycomb observability data: traces, events, metrics, SLOs, triggers, and boards.

Search Robinhood Chain ecosystem projects, retrieve project details, and list categories.

Public webhook inboxes for agents. Receive OAuth redirects, payment callbacks and CI notifications.

Webhook, email, WebSocket and tunnel testing for AI agents: capture, wait, verify, replay.

Live chat and AI agent for websites: answer visitors, manage sites, the AI agent and stats.

SSH connection manager with MCP server for AI-assisted operations across servers.

Free UK calculators, converters and validators (tax, VAT, stamp duty, dates, units), read-only.