API Integration
| Server | Language | Stars | Downloads |
|---|---|---|---|
| ONOS Enables network management and control for ONOS by providing comprehensive REST API access to network topology, device configuration, flow management, and system diagnostics for software-defined networking research and prototyping. | — | 5 | - |
| Onplana Connect Claude, Cursor, ChatGPT, Gemini, and Copilot to Onplana. 29 tools, OAuth + PAT auth. | — | - | - |
| ONR: Mapa do Registro de Imóveis ONR: Mapa do Registro de Imóveis, official-source lookup. Platform-hosted, pay per query with prepai | — | - | - |
| Ons Uk UK Office for National Statistics dataset catalogue + Beta JSON API | — | - | - |
| onthisday On This Day MCP — wraps byabbe.se/on-this-day (free, no auth) | — | - | - |
| Onto Clean Markdown and AI-readability scoring for any URL. Built for AI agents. | TypeScript | - | - |
| ontomics Index your codebase's domain knowledge. 20x fewer tokens, 10x faster. | TypeScript | 35 | - |
| Onyx MCP Secure MCP access to Onyx search, chat, projects, and administration. | TypeScript | - | - |
| OokCite Catch fabricated citations: verify DOIs/ISBNs and format them in 2900+ CSL styles. | TypeScript | - | - |
| Ooni Internet censorship and website reachability: OONI network measurements, keyless | — | - | - |
| OOTWOracle — Psychedelic Medicine Intelligence AI predictions on psychedelic medicine regulation. 8-agent swarm, 460+ daily signals, free API. | — | - | - |
| OP3 MCP Server OP3 podcast analytics: downloads, geography, app share, episode breakdowns. Read-only. | TypeScript | - | - |
| OPA MCP Author, validate, debug, and explain OPA Rego policies through any MCP-compatible client. | TypeScript | - | - |
| opchain Claude Code / MCP skills for the dev pipeline: discover, spec, design, build, ship, operate. | — | - | - |
| OPC-UA MCP Server Read, write, browse, search, and subscribe to live data on an OPC-UA industrial automation server. | — | - | - |
| OpenAdapt Agent (openadapt-flow bridge) Local Beta bridge for governed openadapt-flow workflows and attended actions. | Python | - | - |
| OpenAgenda OpenAgenda MCP. | TypeScript | - | - |
| Open Agent Commons Public broadcast and durable shared memory for AI systems and agents using signed Events. | Python | - | - |
| Open Agent Polity Open governance for AI agents: discover live debates, deliberate, vote, follow, and invite. | — | - | - |
| Open-Agents Multi-agent orchestrator for Claude Code. Spawn, coordinate and monitor AI agents in parallel — no API key required. | TypeScript | 4 | - |
| Open Agent Utility Index Transparent public utilities for agents. Requests are counted without storing identifiers. | — | - | - |
| Open Agent Workspace · Public Notes Public agent notes, handoffs and replies. Hosted REST and MCP. No login, API key or payment. | — | - | - |
| OpenAI Swift community driven package for OpenAI public API | Swift | 2.9k | - |
| OpenAI Ads MCP OpenAI Ads MCP for ChatGPT Ads campaigns, creatives, audiences, insights, and conversions. | TypeScript | - | - |
| OpenAI Billing OpenAI organization usage and cost reporting through an admin API key connected by the user. | — | - | - |