MCP Server Directory

Verified AI-tool prices and AI product margin math for agents.

Embedded, local-first memory and retrieval for AI agents. One SQLite file, no server, no API key.

regexcronsql-validator io.github.encodi/regexcronsql-validator

Valida regex, cron y SQL contra ejecucion real. Pago por llamada via x402/USDC.

Gmail MCP server for email triage: search, labels, archive, trash, unsubscribe, snooze.

Zetesis Scientific Due Diligence io.github.reutavidan/zetesis

Due diligence on life-science claims: omics, trials, gene therapy. Dimension by dimension.

MCP server that pays x402-gated HTTP endpoints — fetch, and on a 402 authorize, sign, retry

Coherence guard for shared files: denies stale writes so agents don't silently overwrite each other.

Query Yandex Webmaster indexing, queries, diagnostics and backlinks, and recrawl, via an AI agent.

Agent-native API client: execute/test REST/GraphQL/WS/SSE with assertions, extraction, collections

Read-only IBKR MCP: account, positions, brief, regime, stress, reporting, Edge, and risk.

contractor-quote-check com.checkmycontractorquote/contractor-quote-check

Check contractor quotes for red flags and pricing risks. Free scan, paid reports, RFP tools.

Local confidentiality chamber: blocks the wrong AI output before it leaves the machine.

IssueFoundry Agent Market io.github.codework-lgtm/issuefoundry-agent-market

Discover agent services and buy IssueFoundry's fractional-cent x402 reliability utilities.

Place search, directions, isochrones & area analysis across 10 map providers. No API key to start.

ecommerce-prompts-mcp io.github.xpaysh/ecommerce-prompts-mcp

Free copy-and-run ChatGPT prompts for online stores: 924 prompts, 43 categories + 10 tasks.

LandingConnect com.landingconnect/landingconnect

Build & publish sites — or a game, a calendar, a report — by chatting with Claude. Live in seconds.

Claude Cost Audit io.github.tylerscomic-lab/claude-cost-audit-mcp

Exact Claude API cost calc with real cache economics, plus a tiktoken-misuse scanner.

quant-brain-mcp io.github.paarths-collab/quant-brain-mcp

Stock analysis MCP: 38 indicators, 7 optimizers, 8 backtests, US + India sectors.

Bug Bounty Intelligence io.github.holistis/bug-bounty-intelligence-mcp

AI security scanner for Solidity + free CC0 dataset of Sherlock audit-competition acceptance rates.

A security-focused MCP server for self-hosted n8n Community Edition.

Last.fm MCP server: scrobbles, charts, artist/album/track info and more

adu-zoning io.github.themutherfvcker/adu-zoning

Check if a Florida address can build an ADU: county GIS zoning, eligibility verdict, local rules.

Customer access to the Crown Town Compost portal: pickups, invoices, and skips (AI-built).

Offline deterministic engineering-trust certificates for repositories, with no telemetry.