MCP connectors for ChatGPT

On-Demand-Books

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Find personalized puzzle books by first name from a 100,000+ title Shopify catalog.

Onboard

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Your AI copilot for customer onboarding — projects, KPIs, tasks, and safe writes.

ONCE — Exactly-Once Reliability for AI Agent Actions

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Prevent duplicate AI-agent side effects with idempotency, verification, and durable receipts.

ONCE

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ONCE is music distribution built for agents.

• Create Account: Create a new ONCE account for an allowlisted partner MCP client and return a PKCE-bound OAuth authorization code. Unauthenticated; allowlisted partners only.
• Password Authorize: Authorize an existing ONCE account for an allowlisted partner MCP client and return a PKCE-bound OAuth authorization code. Unauthenticated; allowlisted partners only.
• Get Metadata Rules: REQUIRED ON CONNECT: Return the metadata rules hitlist (markdown) agents must read after authentication and apply when guiding the user. Same content as mcp://docs/metadata-rules-h

OnceAsk

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MCP server for OnceAsk, the AI-native current-address layer for people and agents.

onchain-activity-index

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DeFi Protocol Activity Index -- quantitative on-chain activity metric from DefiLlama data

onchain-agents

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Sato Hub gives AI assistants and agents structured access to the onchain agent ecosystem.

• Onchain Agent Search Resources: Search the Onchain Agent directory of onchain agents, frameworks, skills, and tooling. Filters: query (free text, AND-matched terms), chain, status, liveness, featured,
• Onchain Agent Get Resource: Get the full record for one directory resource by slug, optionally with its recent activity feed (releases/posts). Use onchain_agent_search_resources first to find a slug.
• Onchain Agent Get Deploy Spec: Get the structured deploy manifest for one resource by slug — the essential, install-and-instantiate information an agent needs to BUILD from it: runtime, install comman

OnchainAI

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Crypto tool MCP: search/trust/install-risk.

OnchainDiligence

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Pay-per-call compliance via x402: wallet sanctions, OFAC name, UK + US company verification.

Oncofiles

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AI-powered medical document management for cancer patients.

One

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Search, document and execute authenticated API calls across 700+ apps via one MCP server

Read-only approved AI tools, public stacks, guides, and evidence-aware comparisons.

One AI Guide

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One AI Guide is an independent directory and decision guide for AI tools.

• Search Tools: Search approved One AI Guide tools.
• Get Tool: Get one approved tool by UUID or canonical slug.
• List Stacks: List approved public or template stacks whose tools are approved.

one-brain

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Shared memory for a team in Claude Code: what one person records, everyone has.

One drive

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Browse and search OneDrive, upload and download files, create folders, copy, move, and delete items, find duplicates, and manage share links and permissions.

• Arcade ListApps: See the apps the current caller can act on and whether they are connected. Returns each app's id, name, connected state, and (when connected) the account it is connected as. Call this
• MicrosoftOnedrive CopyItem: Copy a file or folder and wait for the copy to finish, returning the new item. Microsoft Graph performs copies asynchronously; this tool polls the operation to completion w
• MicrosoftOnedrive CreateFolder: Create a new folder in OneDrive.

一心eSIM商品目錄查詢與下單服務：查詢各國eSIM上網方案的即時價格與庫存、依旅遊天數與用量推薦方案、協助建立訂單並取得LinePay或ECPay付款連結。

Ten machine-readable signals on one public page: the top miss if any, and a receipt we re-verify.

Search a curated gallery of live, tryable AI-built products for prior art.

OneAIMemory

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Cross-device AI memory with encrypted activity capture and context handoff between AI tools

onebusaway-mcp-server

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Real-time transit stops, routes, arrivals, vehicle positions, and schedules via OneBusAway APIs.

oneda

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Persistent, governed institutional memory for Claude Code — specs, decisions, learnings.

Versioned agent memory in your own Postgres: portable context, permissioned, audit trail.

OneHaus

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OneHaus connects your home to your AI assistant over the Model Context Protocol.

• Create Contact: Create a contact
• Update Contact: Update a contact
• Delete Contact: Soft-delete a contact

onehq-comissions-calculator

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OneHQ Commission Calculator MCP is a MCP server that gives AI assistants direct access to insurance commission calculation and compliance tools.

• Calculate Commission: Calculate insurance commissions across a distribution hierarchy. Given an annual premium and a list of agents/tiers with their contract percentages, returns a full breakdown of w
• Build Hierarchy: Build or model a distribution hierarchy structure. Accepts named tiers with contract percentages and returns a validated hierarchy object ready to use with calculate_commission. Also
• Validate Hierarchy: Validate a commission hierarchy against a specific carrier's maximum allowed contract levels. Flags errors (over-contracted tiers), warnings (outside typical ranges), and returns a

onelens-mcp

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Query OneLens cloud-cost data in natural language: breakdowns, trends, cost centers.

OneLore

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Shared project context for AI agents and teams: docs, tasks, and messages that stay current.

OnePageCRM

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Turn your AI assistant into your CRM assistant.

• Describe: Schema discovery — fields, types, constraints, and examples for reads and writes. Call with no arguments for all entities summary, or pass an entity name for full schema.
• Context: Account-specific reference data: statuses, lead sources, call results, pipelines, users, tags, reason lost options, and custom fields. Call before creating or updating records to get valid fi
• Query: Execute an OQL (OnePageCRM Query Language) query. Pass a JSON query object to read CRM data. Use describe() to discover entities and fields.

OneQAZ Trading Intelligence

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Live market data, signals, positions, and macro analysis for crypto, KR stocks, and US stocks.

MCP server that lets AI assistants use all OneSchema features exposed via the public API.

OneSource MCP

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@one-source/mcp Unified MCP server for OneSource — 31 tools for blockchain data, live chain queries, and API documentation in a single server.

• 1s Address Txs: Get transaction history for an address (sent and received). Sorted by block number descending. Use from_block/to_block to narrow the range.
• 1s Block: Get indexed block details by block number. Returns block metadata including timestamp, transaction count, and gas used. For the latest pending block, use 1s_pending_block instead.
• 1s Contract Info: Get indexed contract metadata including deployment info and detected standards. Use this for enriched contract data; use 1s_contract_info_live for real-time ERC standard detection vi