Developer Tools MCP Servers

3rd Generation Testing (3TG) — generate deterministic test suites from Markdown spec tables via MCP.

Scan the open TCP ports of your own public IP. Fast (32) or deep (65535). No key, no signup.

Find known subdomains of a domain. Passive data; may include historic entries. List or count.

Plan your perfect day out anywhere: itineraries and neighbourhood guides, tuned to mood and weather.

Continuous improvement for software engineering teams: check-ins, improvements, suggestions.

Check whether a NAICS code aligns with a vertical: a routing-for-review signal, not a determination.

Search for books and book-related products, with access to product and delivery details

Official Seoul tourism data in 7 languages, in cooperation with the Seoul Tourism Organization.

BaZi (八字) MCP gateway + 玄学社区. 12 tools (4 fortune + 5 forum + 3 meta). x-api-key required.

Live Steam Market API docs, schemas, products, games, markets and endpoint search.

Book, reschedule, and cancel home services (cleaning, lawn, snow) via phone OTP authentication.

Decrypt .lsa/.lsav files from Xiaomi devices. Upload, status, download, pricing.

Detect breaking changes, generate changelogs, diff, and validate OpenAPI specs.

Investment research superagent: podcasts, SEC filings, and no-code research pipelines.

Pack cargo into containers & onto pallets; a verifiable 3D loading plan. Free tier + REST API.

Curated multilingual dictionary that names code identifiers from domain concepts (KO/JA/ZH/VI/EN).

Corporate travel: search and book flights, hotels, rail and transfers, manage orders.

Sales prospecting and lead generation from Google reviews: local businesses leaking leads, scored.

Live USPS, UPS & FedEx shipping rates plus USPS postage and stamp prices. Free, no API key.

Argentina CUIT/CUIL validation and AFIP fiscal QR generation. Pure, no-auth MCP tools.

Analyze job listings against your resume, track applications, and generate cover letters.

Source-linked US tariff and trade-action changes: legal status, effective dates, dated archive.

The Emotion Dictionary's 402 emotions: define a word, resolve a feeling, body maps. CC BY 4.0.

Crypto market intelligence: social sentiment, on-chain, trending narratives & analyst insights.