Discover Model Context Protocol servers from the official registry. Publisher metadata with transparent provenance — not a security certification.
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16 099 records · Registry listing ≠ independent verification by NexIP
io.github.OrtaMarco/mx-fiscal-mcp-server
Validate RFC, CURP, CLABE and NSS, read CFDI 4.0 invoices and check their SAT status. No keys.
io.github.OrtaMarco/domain-security-mcp-server
Audit a domain's email and web security: SPF, DKIM, DMARC, MTA-STS, DNSSEC, TLS, WHOIS. No API keys.
io.github.OrihuelaConde/local-whisper-mcp
Private audio and video transcription with Whisper on your own computer, on the GPU or CPU.
io.github.OrgMentem/zotio
Zotero MCP server: local-first search, library checks, and preview-first writes for AI agents.
io.github.OrestKlymko/penlydoc-mcp
Send documents for e-signature, track who signed and save sealed PDFs with PenlyDoc.
io.github.OrbisAPI/orbis-mcp
8,000+ pay-per-call APIs via x402 USDC micropayments on Base. No API keys needed.
io.github.OrangeproAI/orangepro
Find test gaps, generate grounded tests, and dynamically prove behavior with mutation testing.
io.github.Opita-Code/dark-memory-mcp
Persistent memory + vibe-loop engine for AI agents. Single Go binary, SQLite-backed, stdio MCP.
io.github.Openly-Useful/citewire
Attribution-first MCP server for free news sources and free article APIs.
io.github.OpenTrain-AI/opentrain
Hire human data labelers, RLHF annotators, and evaluators from your coding agent.
io.github.OpenPowerShift/raptor-studio
Build, validate and simulate reliability block diagrams (RAM analysis) from an AI assistant.
io.github.OpenInterpretability/ekbasis
Foresee what git commands and multi-step changes will do, as calibrated probabilities
io.github.OpenImageDebugger/oid-mcp
MCP server giving AI agents eyes on OpenImageDebugger buffers in live gdb/lldb sessions
io.github.OpenHCSDev/openhcs
Inspect, author, validate, and run high-content microscopy workflows.
io.github.OpenAdaptAI/openadapt-agent
Your AI agent decides what to enter. OpenAdapt enters it in the app and checks that it saved.
io.github.OnourImpram/mneme
Vault-native, accountable memory for Claude Code and MCP clients. Markdown is ground truth.
io.github.Onlydns/onlydns-mcp
Model Context Protocol server for OnlyDNS to manage DNS zones, records, DNSSEC, and TSIG keys.
io.github.OniVe/weeeking
MCP server for Weeek with full public API coverage: tasks, projects, CRM, time tracking.
io.github.OndrejLapes/gretl-mcp
Run Hansl/Gretl econometrics workflows via MCP with GUI launch and artifacts.
io.github.Oncorporation/filesystem-server
Secure filesystem access for AI agents with configurable directory and file type restrictions
