"Popular MCP tools commonly used by programmers" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
MCP-native AI browser testing for coding agents. Submit a URL + goal, get back action trail, bugs, screenshots, and WebM video your agent patches from directly. 43 tools, 12 AI evaluation personalities, combo tiers with auto-pause-on-bugs, throwaway email + SMS inboxes.
12 free MCP tools for local validation of emails, URLs, IP addresses, IBANs, dates, UUIDs, JSON and other structured inputs. No API key or external verification service required.
7 free MCP tools for optimizing HTML, JavaScript, CSS, JSON, CSV, prompts and terminal text. Lightweight, local transformations designed for AI agents and developer workflows.
13 free MCP tools for generating synthetic test data, mock identities, color palettes, SVG avatars, placeholder text, slugs, hashes and random tokens. Built for AI agents, prototyping and software testing.
32 free MCP tools for data validation, text optimization, and synthetic test data.
Check one web page for broken links, redirect chains hop by hop and mixed content. Free, no key.
Benchmark your own prompt on 100+ models with real API calls, then choose the winner by accuracy, cost, speed, or any mix of those.
32 free MCP tools for data validation, text optimization, and synthetic test data.
Independent schema and rule check of AI agent output before you pay. Signed attestation and receipt.
Audit public webpages and supplied markup for HTML, CSS, SEO, JSON-LD, and link issues.
Lint a SKILL.md for frontmatter, structure, secrets and size. All 6 tools free.
Risk-scan a diff, flag AI-generated-code tells, find secrets. 5 of 7 tools need no account.
Free AI test helpers: injection inputs, OWASP mapping, release plans, response and tool-call packs.
Technical SEO audit tools over MCP. Wrendex crawls a site with 140+ checks (broken links, redirects, canonicals, hreflang, sitemaps, structured data, duplicate trackers, render-blocking resources, Core Web Vitals page weight) and exposes crawl runs, issues and fix lists as tools so coding agents like Claude Code, Cursor and Codex can audit and fix a site. Stateless Streamable HTTP; authenticate with a Wrendex bearer token from https://wrendex.com/docs.
Agent website testing: browser QA, visual regression, Markdown extraction, and security checks.
Paid deterministic data-quality and execution-verification tools for AI agents.
Zero-config agent-readiness auditor and Flight Simulator tools for AI coding agents
Scan URLs or HTML for WCAG 2.2 accessibility violations. 75-rule manifest, severity-weighted score, shareable HTML/CSV/JSON reports. Tools: scan_url, scan_html, get_report, list_rules.
Run, debug, and triage tests from your IDE using natural language, no dashboard switching, no manual data transfers. The TestMu AI (formerly LambdaTest) MCP Server is a single remote server exposing four tool suites: HyperExecute — analyze your project, generate YAML configs and test runner commands, then monitor jobs and sessions. Automation — pull a TestID's details plus command, network, and console logs into one chat for instant root-cause analysis. Includes mobile app upload. SmartUI — explain pixel, layout, DOM, and perceptual changes in a visual regression run, with context-aware React/HTML/CSS fixes. Accessibility — audit any public URL or a local React app against WCAG and get ready-to-apply remediation steps. Connects over https://mcp.lambdatest.com/mcp using OAuth 2.1 — no API keys in your config. One-click install in Cursor; works with Claude, GitHub Copilot, Cline, and any MCP client. Tests execute on the TestMu AI cloud: 3,000+ browsers and 10,000+ real devices.
Pine Script backtest-trap checks, backtest reconciliation and official Korean finance data.
