Developer tools MCP servers

HouseExhale

@attachmentnerd

Explain bedroom CO2 readings, check certified HRV/ERV airflow, and find US installers and rebates.

SafeStreets

@Poseidon-t

Walkability and pedestrian safety for any US address: scores, neighborhoods, deadly roads.

Lab4U

mcp.lab4u.ru

Lab4U (Russia): pick lab tests for a goal or a doctor's list and build a cart on lab4u.ru

SemverKit

semverkit.mike-tusa.workers.dev

Semver parse, compare, npm range checks, max-satisfying and version bumps (node-semver compatible).

toolgrep

toolgrep.com

Find developer tools, APIs, MCP servers and SaaS by need, with pricing, free tier and API facts.

Nerf Watch

tokenusage.dev

Daily Nerf Watch scores for Claude and GPT models on one private, code-graded suite. Read-only.

Codex Reset Tracker

tokenusage.dev

Codex reset tracker: usage-limit reset announcements from @thsottiaux on X. Read-only, no key.

Ncrypt

@andyrzr-bot

Share documents privately from an AI agent. The agent gets a link; it cannot read the file.

Worth

@a21ai

Find what anything is worth: resale value, used and new prices, and where to buy or sell it.

Agent Tested

agenttested.dev

Hands-on agent test results for small AI tools and MCP servers, live AI outages, malware name check.

Snip

snip.link

Free QR codes that never expire and free short links with click stats.

CoreNexis API

corenexis.com

PDF from HTML or Markdown, OCR, email validation, image conversion and hosting, QR and barcodes.

Summer

gosummer.ai

Telehealth support for Claude, Codex and Cursor: investigate cases and connect your tools.

Ball Ranks Fantasy Sports

@Ollynov

Fantasy football and basketball rankings and player projections from Ball Ranks.

CodeTrendy

codetrendy.com

Search the CodeTrendy directory of websites and tools. Read-only, no API key.

Verdict L402

@jeannicolasdavid1979

Ask if an action is safe before your agent runs it: injection, shell, MCP installs. Free samples.

Stint

@enigma-1111

A shared story anyone can continue. Read the last line, quote a passage, submit a paid line.

DEEPBOM

@JunHwan-Kwon

Browser-local and CLI static evidence for deployed AI model artifacts.

DeepStack: Independent analysis of the AI economy

@mcauduro0

Where informed investors disagree, the evidence each side stands on, and the date that settles it.

dochost

@zyli5313

Publish, list, update and delete shareable Markdown/HTML pages from your AI assistant.

Trade Evidence

@Standard-Trade

All 36,524 Canton Fair 2026 exhibitors: find factories, flag traders, MOQs, prices, US import rules.

fline

fline.sh

Hosting for apps you build with AI. Tested with Claude Code and Codex. Private beta: ask for access.

Suprsonic

@O-mega-Enterprise

One API key, dozens of capabilities for your AI agent. Zero provider auth.

KnownFix

@b-hash88

Developer fixes, free skills, browser tools and scoped technical services over MCP.

qrcode.io QR codes

qrcode.io

Free static QR codes (PNG or SVG) that never expire, for URLs, WiFi, vCards and text. No account.

ReelsMeals

@jmqcooper

Find free public recipes; import links and plan meals from your cookbook. Private tools need a plan.

Oids

@oidsdev

The communications layer for AI agents: posts, DMs, team rooms, and file exchange.

SAASH Saudi Government, Business, Workforce & Legal Services | خدمات سعودية للوكلاء

@SAASH-SA

Saudi government, citizen, business, legal and workforce service discovery in Arabic and English.

QuotaTick

@backstagebarcelona66-maker

Did Codex, Claude Code or Cursor reset usage limits today? Live status and news, official sources.

Helfer & Profi

@helferundprofi

Free German neighborhood marketplace: search local help requests and providers by postal code.

IndiaInsurances

indiainsurances.com

Every Indian insurance policy, clause by clause, with verbatim quotes. Free, no API key.

PokerData

@hft-studio

GTO poker solver data: NLHE/PLO preflop ranges, postflop strategy, EV. 6-max NL preflop free.

MentionFox

@OsakaSaul

Cited research on people and companies, plus buyers with a filed reason to buy now. Free to try.

ITC Prevailing Wage & Apprenticeship Guide

@ovanova-solar

IRS prevailing wage & apprenticeship (PWA) rules for the clean-energy ITC: checks, cures, rates.

Sunrise & Sunset Times

sunrise-sunset.org

Sunrise, sunset, twilight, golden hour and moon times for any place on Earth. Free, no API key.

pekt – norske domener

@datamynt

Check if a domain is available and what it costs at pekt, a Norwegian domain service. No login.

Sportpoeder

sportpoeder.nl

Supplement prices and price history (NL/BE), SupplementScore ratings, verified discount codes, UCP

Research Methods Library

@mikenguyen13

Research methods for AI assistants: study design guidance, R and Python code, and citations

KalshiSpy

kalshispy.com

What Kalshi's top-earning traders won and hold: settled wins free, live markets with an API key.

Soldgraph

@soldgraph

Sold comps and active listings from eBay, Poshmark, Mercari, Depop, Vinted, TCGplayer and more.

Scholar Sidekick

@mlava

Catch AI-fabricated citations (real DOI + fake title). Retraction, open-access, 10,000+ CSL styles.

lovefengis docs

lovefengis.com

Developer documentation of lovefengis (REST API, MCP, CLI, auth) over MCP. Read-only, no auth.

ZEAM :: Prism

zeamprism.com

A marketplace for AI agents. Tools and data for agents, on one MCP address. No account, no API key.

HrefGate

hrefgate.mike-tusa.workers.dev

Lint hreflang: codes, x-default, self-reference, canonical, return links. Never fetches URLs.

MoneyDeals – US Tech Deals

moneydeals.com

Verified US consumer-tech deals, coupons and 90-day price history. Free, read-only, no API key.

Barcode Generator

barcodegen.net

Generate barcodes and QR codes in 35 symbologies: QR, Data Matrix, PDF417, EAN-13, Code 128, more.

MeetZone

meetzone-api.mike-tusa.workers.dev

Find meeting times that overlap working hours across IANA time zones, DST-aware. Free tier.

Attest by DataHubz (verify only)

datahubz.com

Verify Attest agreements, stamp codes, receipts, proofs and SHA-256 fingerprints, with no sign-in.

AI Agents API Library

@eater2

Find APIs and MCP servers for AI agents: auth, free tier, MCP endpoint, docs, last-checked date.

Sphere Marketplace

@dtajitdinov-aris

One agent sells work, another buys it; delivery passes a gate and comes with a verifiable receipt.

EGOS (público)

@enioxt

Diagnóstico 'cabe IA?' por regra fixa, capacidades do EGOS com prova, pesquisa pública. Sem senha.

ISO 20022 Navigator

@kreativeManish

Look up ISO 20022 messages, bank transaction codes, legacy MT replacements, schemes and code sets.

CodeAtlas

codeatlas.com.br

Read-only CodeAtlas service catalog: list, get and search services. No authentication.

Verithic · official data by municipality

@veredamonte-glitch

Data by municipality near Barcelona and Madrid: €/m², IBI, rent, minutes. Every figure sourced

Tailwind Shades

@bourhaouta

Tailwind CSS palettes (50-950) from any color, the closest Tailwind color, and Tailwind's defaults

Jid: the trust API for AI agents

jid.com

Verify a business before an agent pays, signs or buys: registry-cited decision and signed receipt.

Is It Down API (60SecMonitor)

api.isitdownapi.com

Is this vendor down? Pay-per-call status for 1,400+ SaaS/cloud vendors, up to 25 per call (x402).

SupaPark — Walt Disney World live data

supapark.com

Live Walt Disney World waits, crowd forecasts, Lightning Lane sellouts and prices, dining drop odds.

Relin

@earonesty

Send and receive webhooks, manage customer endpoints, and inspect and retry deliveries.

Whisper

@whisper-sec

One routable IPv6 per AI agent, verifiable from the DNS root. Keyless tools need no signup.