Development

Ontario Protocol

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Audit x402 buyer discovery free; publish signed provider profiles with MCP and Bazaar evidence.

onthisday

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On This Day MCP — wraps byabbe.se/on-this-day (free, no auth)

Onto

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Clean Markdown and AI-readability scoring for any URL.

OntoRamp Decision Intelligence

Degraded

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Log, evaluate, and ground AI decisions against authority context.

OntoRamp Graph Query

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Architecture-grounded query for AI agents.

OntoRamp Knowledge Cartographer

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Knowledge coverage map and health score.

Onvexia — Crypto Fundamentals, Sentiment & Onchain Tracking

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Crypto fundamental analysis, sentiment and whale tracking for traders and AI agents.

Onvexia — Crypto Fundamentals, Sentiment & Onchain Tracking

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Onvexia is a crypto research and market intelligence platform for traders, investors, analysts and AI agents.

• Get Asset: An asset's core profile by symbol: name, category and cross-system identifiers (CoinGecko id, contract addresses, chains). Start here when you have a ticker and need to be sure which asset
• Get Asset Scores: An asset's Galaxy Score and AltRank, with the components behind each. Galaxy Score is a composite of social and market health on a 0-100 scale; AltRank is relative standing against t
• Get Asset Fundamentals: Get the full fundamental brief for an asset: market snapshot, supply and valuation, project, TVL, revenue, treasury, security, governance, unlock schedule, derivatives position

Onymu

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Community: Submitted by a user or imported; check the owner before granting access

Onymu is an MCP server for domain name search, domain availability checking, and social media username lookup.

• Search Domains: Check whether names are available, across many extensions at once. This is the main tool: availability is read from a registry-derived list of every registered domain, refreshed daily,
• Check Usernames: Check whether a username is free on X, Instagram, Facebook, YouTube, TikTok, Snapchat, Pinterest, LinkedIn, Discord, GitHub, Telegram and Twitch, and how many apps already carry the n
• Generate Domains: Turn a keyword into brandable name candidates that are free to register. Generation is deterministic — no model is involved, so the same keyword always produces the same candidates —

onyx-mcp

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Ed25519-signed ground-truth oracle — 63 paid x402 tools live on Base mainnet.

Oolkin

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AI colleagues that keep your standards, your project and their reasoning between sessions

Ooni

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Internet censorship and website reachability: OONI network measurements, keyless

opc-mcp-server

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OPC Suite — CRM, sales, inventory, accounting, HRM, payroll, claims, projects from any AI agent.

OPC UA Modeler

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OPC UA companion spec types, namespace dependencies, and engineering units for AI agents

opchain

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Claude Code / MCP skills for the dev pipeline: discover, spec, design, build, ship, operate.

Opedd — Licensed Content for AI

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Licensed, rights-cleared content for AI agents - verifiable license keys + EU AI Act attestation.

Open Agent Polity

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Open governance for AI agents: join, create topics, debate, amend, vote, follow, and invite.

Open Agreements

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Fill standard legal agreement templates (NDAs, SAFEs, NVCA docs, employment) as DOCX files.

Open Archives

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MCP server for Open Archives: Dutch genealogical records and historical page transcriptions.

Open Contracting

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Open Contracting MCP — international public procurement: government tenders

Open Corporates

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OpenCorporates MCP — Global company registry data (free, no auth, rate limited)

Open Economics

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Discover, resolve, and query official Brazilian economic data with semantic search and provenance.

Open Elevation

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Open-Elevation MCP — terrain elevation by lat/lon (no auth)

Open Ephemeris

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Sub-arcsecond astrology on NASA JPL DE440: natal, transits, Human Design, Vedic, BaZi.

Open Fec

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OpenFEC MCP — Federal Election Commission campaign finance data

Open Food Facts Mcp

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Unlock the power of food transparency with our Open Food Facts MCP server.

Open House Copilot

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AI open-house assistant for agents: sign-in kiosk + automated, consent-aware follow-ups.

Open Library

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Open Library MCP — Internet Archive's open book metadata

Open Location Code shape, value discarded

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Open Location Code shape, value discarded

Open Meteo

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Open-Meteo MCP — weather forecast + historical reanalysis + sister APIs