MCP server directory

Lets an AI agent gate its own work before claiming "done": a fail-closed ship checklist (`verify_gate` counts a check satisfied only if explicitly proven), required independent refute-first review, and an append-only sha256-chained receipts ledger that makes any edit to past receipts detectable. `pip install mcp-agent-gate`.

Lightning-paid Nostr signing MCP server. AI agents pay sats per call to sign and publish Nostr events — no API keys, just Lightning. Live at https://mcp.jorgenclaw.ai/sse. Tools: nostr_sign_event (2 sats), nostr_publish_event (3 sats).

280+ free developer & security tools as MCP tools — encoders/decoders, hashes (MD5/SHA/HMAC/bcrypt/argon2/scrypt), JWT decoder, regex tester, JSON/YAML/XML formatters, network diagnostics (ping/traceroute/dig/whois/SSL/SPF/DMARC), OSINT (IP geo, EXIF, vendor lookups), and more. Proxies to the public API at onlinecybertools.com — no auth required. Published to npm with SLSA v1 provenance.

Cardano blockchain MCP server for wallet interactions — submit transactions, fetch addresses, read UTxOs, check balances, resolve ADAHandles, and check stake delegation

Code-intelligence engine that indexes a repo into a persistent knowledge graph — functions, classes, call chains, HTTP routes, cross-service links. 159 languages via tree-sitter + Hybrid LSP, sub-ms structural queries, ~99% fewer tokens than grep. Single static binary, zero dependencies, 100% local. `npx codebase-memory-mcp`

Deploy static HTML folders to permanent vibie.page URLs in seconds. One-line auto-install (`npx vibie-mcp setup`) wires up Claude Desktop and Cursor, OAuth device-flow auth, automatic folder marker for repeat deploys without re-typing slugs.

MCP server for [TaskBounty](https://www.task-bounty.com). AI agents fix GitHub bugs (every fix ships with a regression test) and raise test coverage on your codebase. Posters draft and fund bounties from chat (Stripe Checkout); solvers submit PRs verified end-to-end in a sandbox. Paid in USDC, ETH, or BTC. 11 tools.

Wireflow speaks the Model Context Protocol. Connect Claude or any MCP client and let it build, inspect, and run your AI workflows, and generate and edit media through one canvas, API, and MCP, across 100+ models. It acts on your behalf with explicit consent and per-scope permissions. Add a custom connector in your MCP client and point it at the Streamable HTTP endpoint below. The client walks you through Wireflow’s OAuth sign-in and a consent screen, no manual API keys, no client setup. - OAuth 2.1 authorization code flow with PKCE (S256). - Dynamic Client Registration (RFC 7591), so clients self-register with no pre-shared credentials. - You approve a consent screen listing exactly the permissions the client asked for. Revoke anytime from settings.

Drives a browser (or a native Expo/React Native app on iOS/Android) and your dev server onto one correlated timeline, so a browser console error and the backend stack trace from the same moment line up. Includes `repro` action sequences, a unified log/network query API, and an Electron cockpit.

Durable hybrid memory for AI agents. Combines vector search, BM25, temporal retrieval, and optional Memgraph knowledge graph via reciprocal rank fusion. 6 MCP tools: health, search, answer, feedback, graph_query, graph_add_triple. Self-hosted with Qdrant backend. 82.5% strict accuracy on LoCoMo benchmark. `pip install 'mnemostack[mcp]'`