MCP Server Directory

Base64 encode, input discarded io.github.sadri-dridi/base64-ok

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Deterministic eligibility decisions and test-driven rule authoring via the Aethis developer API.

Delvorn io.github.MrAnderson323/delvorn

GET https://delvorn.site/api/x402/test-asset $0.05 Base. First independent=Certified+$0.05 back.

Toolbox for AI agent skills: scaffold, lint, pack, install, and serve SKILL.md skills

x402 MCP Starter io.github.kadopi/x402-mcp-starter

Free self-hosted x402 USDC billing for Cloudflare MCP servers, with a Base Sepolia test endpoint.

robots-txt-checker io.github.ryuamarines/robots-txt-checker

Checks if a URL path is allowed by robots.txt. x402 payment required (testnet USDC).

HVAC Builder app.hvacbuilder/hvac-builder

Design, solve and simulate HVAC systems from real components, weather years and buildings.

Stratify site.aeon-labs/stratify

Backtest NIFTY option strategies on real 1-minute data, with an honest out-of-sample panel.

Reports what a checked Lean 4 or Metamath proof rests on: inherited sorry, compiler trust, axioms.

AlphaKey IDaaS MCP Server — Manage SSO, MFA, users, apps, and security policies through AI IDE

Xxencode charset, input discarded io.github.sadri-dridi/xx-len

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perfloop ai.perfloop/perfloop

Always-on performance engineering for your own code: proven pull requests, the merge stays yours.

US state OK io.github.sadri-dridi/st-ok

USPS state code OK.

site uk.co.levtestingcost/site

LEV Testing Cost: the site's own MCP server — enquiry (enquiry = a human handoff, not a...

Cross-repository semantic code intelligence for AI coding agents, from a local code graph.

Rocket Launch Schedule (SpaceX, Falcon, Electron) — buy per-query in-session (launchwatch) com.a2awire/data-rocket-launch-schedule-spacex

Rocket launch schedule: SpaceX, Falcon, Electron. $0.01/query, free testnet funds.

DELBOY companion-MCP — neutral provenance/attestation layer for agentic finance. Witness only: signs

Run bounded, deterministic MCP reliability tests and generate executable regressions.

A2AWire Benchmark: Predict the News com.a2awire/benchmark-predict-the-news

Free to compete: testnet faucet funds everything. Predict news outcomes. Get scored, get hired.

Seldons Korea Trade ai.seldons/korea-business-trade

Korean tax-office and fair-trade registries, HS codes, landed cost. Two tools need no API key.

RiverWatch: USGS river levels & stream-flow gauges — per query com.a2awire/data-river-level-stream-flow-flood-alert-gauge

River levels & flood alerts: USGS gauges. $0.01/query. Register in-session — free testnet funds.

US Weather Alerts (NWS Warnings & Watches) — buy per-query in-session (usweather) com.a2awire/data-us-weather-alerts-nws

US weather alerts (NWS): warnings, watches. $0.01/query. Register in-session — free testnet funds.

Fieldstub com.fieldstub/fieldstub

Capture extra work on a jobsite and file it into Procore as a Change Event on real budget codes.

barcode-qr-code-sepa-payment-ean13 io.github.theluckystrike/barcode-qr-code-sepa-payment-ean13

QR codes and barcodes offline: WiFi, vCards, SEPA payment codes, Code 128, EAN-13, SVG or PNG.