MCP servers for ChatGPT

Identify integer sequences by terms, search the OEIS, read formulas, programs, b-files, cross-refs.

45+ interactive charts, dashboards, flowcharts, and KPIs inside any AI conversation

Browse free to play PC games and their details from FreeToGame. No key required.

IP geolocation from GeoJS. No key required.

11 tools for managing Grist documents with AI

Unified MCP Hub for managing multiple Model Context Protocol servers

Gmail MCP server for email triage: search, labels, archive, trash, unsubscribe, snooze.

MCP server for ComfyUI: text-to-image, variations, img2img refine, upscale, image proxy.

Search books and fetch volume details from the Google Books API. No key required.

FCC Census Block API: find census block, state, county and tract for coordinates.

Validate and format IBAN bank account numbers locally. No network and no key.

Generate PDF documents locally with text, headings, and pages. No network and no key.

Governed agent access to ERPNext — MCP + A2A doors, one spine. No debit without a credit.

Portable cryptographic identity for AI agents. Ed25519 keypairs and signed manifests.

Web search, clean page reading & one-call research dossiers for AI agents. No API key.

Ping Identity Aic is an MCP server that runs on your own machine, started by your client over stdio.

PubMed & Europe PMC literature search, US/UK drug labelling, and clinical trials for AI assistants.

Search Stack Exchange questions, fetch Q&A threads as markdown, look up tag FAQs and user profiles.

Offline full-text search over the HackTricks security wiki, synced every 3 days.

MCP Server for notify to Weixin, Telegram, Bark, Lark, Feishu, DingTalk

MCP server for the @agentutility edge-finance cluster — pay-per-call x402 tools, no API keys, USDC…