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MCP servers published as npm packages: octapi to Open Primitive
8,832 servers in the MCP Registry are distributed as a Node.js package published to the npm registry. They run on the user's own computer and need Node.js; clients usually start it with npx.
| Server | Runs |
|---|---|
| octapiA business's WhatsApp front desk as tools: inbox, customers, catalogue, bookings, fees. | Local · stdio |
| Octen MCPURL to LLM-ready markdown — plus per-page category, page_structure, and query-driven highlights. | Local · stdio |
| OctobrainPersistent memory for AI assistants with semantic search and knowledge graph relationships. | Local · stdio |
| OctocodeAI-powered code indexer with semantic search and knowledge graphs. | Local · stdio |
| Octocode MCP - AI Context PlatformAI code research platform. Search, analyze, and extract insights from any GitHub repository. | Local · stdio |
| OctoCounts MCP ServerAnalyze and compare public GitHub repo line counts (SLOC) via OctoCounts, from any MCP client. | Local · stdio |
| OctofsStandalone MCP filesystem tools server — view, edit, shell, workdir. | Local · stdio |
| Octopus BlackboardShared memory & coordination for AI coding agents — a blackboard, not an orchestrator. | Local · stdio |
| Octri API DocsSearch an Octri project's API docs and call its endpoints as tools, shaped by its SDK Studio config. | Local · stdio |
| Octri CLIPush OpenAPI specs, build SDKs in ten languages, publish API docs, and triage production SDK errors. | Local · stdio |
| ocularVision tools for coding agents: screenshots, OCR, UI diffs, errors, tables, and charts. | Local · stdio |
| Ocular Audio MCPMCP server for video transcripts, screenshots, and OCR on YouTube and web videos. | Local · stdio |
| OculoAI-powered native browser with 12 MCP tools. ~30 tokens per page. | Local · stdio |
| Odds Api MCP ServerLive sports betting odds from 365+ bookmakers across 34 sports, with value bets and arbitrage. | Local · stdio |
| Odoo MCP ConnectorQuery, report on, and optionally modify any Odoo ERP from Claude. Read-only by default. | Local · stdio |
| Odoo Surface MCPFull Odoo access for AI agents via MCP: CRUD, website, translations, attachments, workflows. | Local · stdio |
| Odysee MCPKeyless Odysee video search by keyword or channel. | Local · stdio |
| Oe MCPConnect any AI coding app to enterprise data sources. One binary, one JSON config. | Local · stdio |
| Oe MCPConnect Claude Code, Cursor & Windsurf to 2,600+ enterprise data sources with one binary. | Local · stdio |
| Oecd MCPOECD economic data via SDMX. No key required. | Local · stdio |
| Oecd MCP ServerSearch and query 1,500+ OECD statistical datasets via SDMX. Keyless. | Remote & Local · HTTP, stdio |
| Oeis MCPUse this MCP server to the OEIS, the encyclopedia of integer sequences. Look up any sequence,... | Local · stdio |
| Oeis MCP ServerIdentify integer sequences by terms, search the OEIS, read formulas, programs, b-files, cross-refs. | Remote & Local · HTTP, stdio |
| Office Addin MCPMCP server for Office add-ins via WebView2/CDP. Provides excel.*, page.*, and addin.* tools. | Local · stdio |
| Office MCPLocal Windows MCP server for creating and reviewing Excel, Word, and PowerPoint files. | Local · stdio |
| Office Outlook MCPOutlook / Microsoft 365 for Claude — mail, calendar, contacts and tasks, with confirm-gated sending. | Local · stdio |
| Office Quotes MCPQuotes from The Office TV show. No key required. | Local · stdio |
| Offline ProtocolFind Offline Protocol SDK packages, read integration guides, plan and scaffold local apps. | Local · stdio |
| OfflineCreator StudioCreate images and videos with OfflineCreator Studio through OAuth or the npm stdio server. | Remote & Local · HTTP, stdio |
| Ofw MCPOurFamilyWizard co-parenting for Claude — messages, calendar, expenses, and journal. | Local · stdio |
| OGForge MCPGenerate Open Graph images with themes and Lucide icons. | Local · stdio |
| Ogs MCPKeyless MCP server for Online-Go.com: Go/Baduk/Weiqi players, ratings, recent games. | Local · stdio |
| Oh My Posh ConfiguratorMCP server for creating, validating, and exporting Oh My Posh terminal prompt configurations. | Local · stdio |
| Ohdear MCPOh Dear API: monitors, checks, statuses. | Local · stdio |
| Ohm MCPAST-based Python refactoring MCP server with safe automated refactorings and rollback. | Local · stdio |
| ohmyho.stOperate ohmyho.st hosting from your coding agent: deploy GitHub apps, Postgres, mail, domains. | Local · stdio |
| OilpriceAPI MCP-SERVERSource-timestamped energy data and reviewed OilPriceAPI product facts for MCP clients. | Local · stdio |
| oJo — HTML to image and PDFRender HTML or templates to a hosted PNG or PDF, in one response. Free previews need no API key. | Local · stdio |
| Okaneland MCPVerified AI-tool prices and AI product margin math for agents. | Local · stdio |
| okf-mcpValidate, search, graph, and safely author local Open Knowledge Format bundles. | Local · stdio |
| okffsMCP server connecting Claude Code to GitHub for an issue to branch to PR to close workflow. | Local · stdio |
| Oliver's mTOR AtlasEvidence-labelled mTOR research: studies, entities, pathway claims, contradictions, open questions. | Remote & Local · HTTP, stdio |
| Ollos MCPLocal, offline transcription, speakers, keyframes, on-screen text and review of any audio or video. | Local · stdio |
| Ololand DdOloLand M&A intelligence — 33 tools for deal analysis, valuation, risk, and cross-deal learning. | Remote & Local · HTTP, stdio |
| Omdb MCPQuery the OMDb API: movie/series search and full details with ratings. | Local · stdio |
| Omitly MCPOmitly's local, verifiable PDF redaction for AI agents — your documents never leave your device. | Local · stdio |
| Omnarai MCPDeliberation + live 5-model council divergence over the Omnarai multi-AI attributed corpus. | Remote & Local · HTTP, stdio |
| Omni MCP ServerAll-in-one MCP server: GitHub, Git, Slack, web fetch, memory, and filesystem. Agent Mode opt-in. | Local · stdio |
| OmnicordDiscord server management MCP for AI agents: chat, moderation, admin, and full server building. | Local · stdio |
| OmnideckLocal privacy-first tools: redact secrets, decode JWTs, compare LLM costs. No network calls. | Local · stdio |
| Omnidim MCP ServerOfficial MCP server for OmniDimension. Drive voice agents, dispatch calls, and run bulk campaigns. | Remote & Local · HTTP, stdio |
| OmniFocusFull CRUD MCP server for OmniFocus via Omni Automation — tasks, projects, folders, tags, recurrence. | Local · stdio |
| OmniologyAI agents compete for real USDC in skill contests on Solana mainnet (ART, STORY, JOKE, OMEGA) | Remote & Local · HTTP, stdio |
| Omnisockit MCPTurn your AI into a WeCom development expert. 41 SKILLs, 550+ APIs. | Local · stdio |
| Omophub MCPSearch, lookup, map, and navigate OMOP medical vocabularies via AI agents. | Local · stdio |
| omp-worker-mcpDelegate complete coding tasks to the local OMP default model and inspect the result. | Local · stdio |
| On This Day MCPHistoric births, deaths, and events for any date from Wikipedia. No key required. | Local · stdio |
| On va où ? Routing APIAddress geocoding and bike, scooter, motorcycle, wheelchair and walking routes across Europe. | Local · stdio |
| OnceExecution-safety MCP for AI coding agents protecting consequential writes from unsafe retries. | Local · stdio |
| Onchain Agent WalletsGive an AI agent a Solana spending allowance instead of your key. Chain-enforced cap, x402. | Local · stdio |
| Onchain Safety MCPToken-safety for AI agents: rug/honeypot verdict + score across PulseChain, Monad, Base & BSC. | Local · stdio |
| Onde Inference CLIManage your Onde Inference account and models: apps, model catalog, fine-tuned GGUF deploys. | Local · stdio |
| OneFind, document and execute authenticated API calls across 700+ apps via one MCP server. | Remote & Local · HTTP, stdio |
| One Search MCPWeb search, URL discovery, scraping & extraction with agent-browser and search providers. | Local · stdio |
| One Shot UiDeterministic UI extraction and screenshot diffing for AI coding agents. | Local · stdio |
| Onebusaway MCP ServerReal-time transit stops, routes, arrivals, vehicle positions, and schedules via OneBusAway APIs. | Remote & Local · HTTP, stdio |
| Onehome MCPOneHome (CoreLogic) real-estate access for Claude — search, property details, photos, saved homes. | Local · stdio |
| Onelogin MCPMCP server for OneLogin API - manage users, apps, roles, and authentication. | Local · stdio |
| OnepasswordMCP server for interacting with 1Password via the CLI to read and manage credentials. | Local · stdio |
| Onepassword Agent MCPLocal MCP access to approved 1Password fields without exposing plaintext secrets to AI agents. | Local · stdio |
| Onepiece OracleOne Piece TCG MCP server with card search, deck analysis, and set browsing. | Local · stdio |
| Oneshot MCPSearch receipt-verified agent build packs, with each pack's real M-of-N pass rate. | Local · stdio |
| Onesignal MCPQuery the OneSignal API (free tier; use a current v2 Organization API key for ONESIGNAL_USER_KEY. | Local · stdio |
| OneSource MCPBlockchain data, Deepstate and Standard Reserve markets, live chain queries, and API docs. | Local · stdio |
| OnlyswapsDEX meta-aggregator for AI agents. Best prices from 15+ aggregators across 13 chains. | Local · stdio |
| OnshapeDrive Onshape CAD from an assistant: documents, sketches, solid features, assemblies and exports. | Local · stdio |
| Onthecheap MCPOn the Cheap MCP — free and cheap events, deals and local guides across 14 US cities. | Local · stdio |
| OntoClean Markdown and AI-readability scoring for any URL. Built for AI agents. | Remote & Local · HTTP, stdio |
| ontomicsIndex your codebase's domain knowledge. 20x fewer tokens, faster. | Local · stdio |
| Onyx MCPSecure MCP access to Onyx search, chat, projects, and administration. | Local · stdio |
| OokCiteCatch fabricated citations: verify DOIs/ISBNs and format them in 2900+ CSL styles. | Local · stdio |
| Oorep MCPMCP server and TypeScript SDK for OOREP homeopathic repertory and materia medica reference data. | Local · stdio |
| OP3 MCP ServerOP3 podcast analytics: downloads, geography, app share, episode breakdowns. Read-only. | Local · stdio |
| OPA MCPAuthor, validate, debug, and explain OPA Rego policies through any MCP-compatible client. | Local · stdio |
| Opc MCP ServerOPC Suite — CRM, sales, inventory, accounting, HRM, payroll, claims, projects from any AI agent. | Remote & Local · HTTP, stdio |
| OPC UA ModelerOPC UA companion spec types, namespace dependencies, and engineering units for AI agents. | Remote & Local · HTTP, stdio |
| Opedd — Licensed Content for AILicensed, rights-cleared content for AI agents - verifiable license keys + EU AI Act attestation. | Remote & Local · HTTP, stdio |
| Open & AsyncDraft decision docs, turn meetings into async artifacts, and triage sync vs async in your editor. | Local · stdio |
| Open AgreementsFill standard legal agreement templates (NDAs, SAFEs, NVCA docs, employment) as DOCX files. | Remote & Local · HTTP, stdio |
| Open Eagle EyeLive snapshots from ~29,000 public cameras across 11 countries — traffic, weather, webcams. | Local · stdio |
| Open Food Facts MCPUse this MCP server to Open Food Facts product, ingredient, allergen, and nutrition lookup.... | Local · stdio |
| Open Food Facts MCP by UnClickSearch food products, ingredients, nutrition, brands, and categories. No API key. By UnClick. | Local · stdio |
| Open Investment ModelRead-only OpenIM search for institutional buy-side investment models and architecture. | Local · stdio |
| Open LibrarySearch books and authors on the Internet Archive's Open Library. | Local · stdio |
| Open Library MCPOpen Library search, works, authors, editions, and ISBN. | Local · stdio |
| Open MCP AppsPersistent, interactive MCP Apps — the AI builds an app once, you both reuse it. | Local · stdio |
| Open Meteo MCPOpen-Meteo weather, geocoding, elevation, and UV forecasts. | Local · stdio |
| Open Meteo MCP ServerGlobal weather via Open-Meteo: forecast, historical, marine, air quality, geocoding, elevation. | Remote & Local · HTTP, stdio |
| Open Notify MCPPeople currently in space from Open Notify. No key required. | Local · stdio |
| Open Primitive33 tools, 30 US federal data domains. Ed25519 signed, provenance chains, entity graph. Free. | Local · stdio |