"Developing a Bulk Email System" matching MCP connectors:

Prompt evals over MCP: run a prompt on your dataset, score each output 1-5 with an LLM judge.

Test-inbox API for email and SMS: create inboxes, long-poll messages, extract OTPs and links.

Rule engine with built-in simulation. 55 MCP tools for complete business rule lifecycle management.

Hire a real human for real-world verification, product testing, AI output review, and errands.

Grade MCP servers A to F with the open behavioral litmus. npm: full toolset; hosted: lookups only.

Promotion gate for AI agents: leakage audits, exact-statistics verdicts, and a live report card.

Email compatibility analysis across 15 clients — preview, audit, fix, diff, deliverability.

Runs your code against a contract; returns HELD or BROKE at the exact input. Deterministic.

Machine-readable taxonomy of 100+ AI system failure modes spanning factuality, alignment, planning, code generation, and instruction following.

MCP server for the Fail Modes taxonomy — a knowledge base of AI system failure modes

Scan URLs for WCAG 2.1 violations, generate AI fixes, and produce VPAT 2.5 compliance reports.

A flock of AI users tests your deployed app and reports where real people get stuck, with fixes.

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.

130+ QA & dev tools for AI agents: prompt injection, RAG testing, VLM eval, guardrails. Free.

MCP server for e-mail testing: create disposable inboxes, wait for delivery, and extract e-mail content or links - all from your AI agent or test automation workflow. Get a free API key on https://app.zyntra.app/

Validate up to 75,000 URLs per job (status, redirects, response times). OAuth 2.1.

Benchmark-first release surface with a read-only MCP endpoint and operator CLI.

Test-inbox API for email and SMS: create inboxes, long-poll messages, extract OTPs and links. 34 tools; bearer auth with an mfx_ API key (free tier).

Drive real Android & iOS devices and web browsers from natural language for mobile + web QA. 145+ tools across device control, app management, automation sessions, browser automation, and flow recording / replay. Bearer-auth — get a token at robotactions.com → Profile → API Tokens.

MCP server providing access to the Scorecard API to evaluate and optimize LLM systems.