MCP servers (7677)
Openreview
OpenReview MCP — ML conference submissions and reviews (API v2)
Opensea
OpenSea MCP — NFT marketplace data (v2 API)
Opensensemap
openSenseMap MCP — citizen-science environmental sensor network (opensensemap.org)
Openstates
OpenStates MCP — bills, legislators, votes in all 50 US states
Opentargets
Open Targets MCP — disease/target/drug knowledge graph.
Opentreeoflife
Open Tree of Life MCP.
Openverse
Openverse MCP — Creative-Commons-licensed image + audio search.
Openweather
OpenWeather MCP — wraps the OpenWeatherMap API (openweathermap.org)
OperatorNest tools
Calculate API and subscription costs, meeting time zones, recurring schedules and cron matches.
OpsLevel
Query your OpsLevel internal developer portal: catalog, maturity data, and tech docs.
Oqmd
OQMD (Open Quantum Materials Database) MCP.
Orange Peel
Cited Hermès price & resale market data as MCP tools, with attribution. Not affiliated.
Orbit
The most in-depth, source-backed context about a person for deep personalization and research.
Orcha
Securely search and manage workspace context files for AI agents and teams.
Orcid
ORCID MCP — public records.
Organizze
Your Organizze finances in natural language: consolidated balances, monthly overview, transaction se
Orla
Personal, family and business books over fiat and crypto. Reads and records; it cannot pay.
Orphograph
Anchor a file's SHA-256 fingerprint to Bitcoin. The file never leaves the device.
Osf
OSF (Open Science Framework, by the Center for Open Science) MCP.
Osrm
OSRM MCP — routing via the public demo server
Osv
OSV.dev (Open Source Vulnerabilities) MCP.
OurPay Wallet
Crypto wallet for AI agents: balances, payments, swaps and trading with owner controls.
Oura Ring
Sleep, readiness, HRV, resting heart rate, activity and stress from your Oura Ring
Outlook Mail
Outlook Mail (Microsoft 365) MCP Pack
Overleaf
Read and edit Overleaf papers from any AI client. Edits can arrive as tracked-change suggestions.
Overpass
OpenStreetMap Overpass MCP — programmatic queries against the OSM database
Overwatch 2 Data MCP Server
Overwatch 2 MCP for hero meta, public player stats, replays, patch notes, and OWCS Korea.
Overwing
Guardrails for LLM output: pass / fail / review verdicts and one recommended action. Hosted or npm.
Owasp
OWASP MCP — keyless.
OwnPG
PostgreSQL DBA tools over MCP, scoped to one database and one schema.