"Scheduler that invokes the agent based on a predefined schedule" matching MCP connectors:

Author and validate Calaf workspace seeds against the app's real importer. No account needed.

Drive real Android & iOS devices and web browsers from natural language for mobile + web QA. 290+ 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.

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

Check that your AI is being logical. Free tool that mathematically catches contradictions in agent reasoning. No account needed. Also offers paid guardrails that converts natural language to formal verification proofs, that anyone can check succinctly.

Score any URL against a real design contract — 40 checks, A-F grade, token + motion validation.

Testing, benchmarking and auditing autonomous AI agents — methods, harnesses, evidence

Lint a SKILL.md for frontmatter, structure, secrets and size. All 6 tools free.

Verify scraped data against the live source page. Signed verdicts, $0.01 via x402.

Seven tools over the tabnas parsing engine: parse, validate, diagnose, fixtures, compare.

Risk-scan a diff, flag AI-generated-code tells, find secrets. 5 of 7 tools need no account.

Point Claude Code, Qwen Code, Cursor, or any MCP client at https://docs.jmeter.ai/api/mcp and your agent answers JMeter questions grounded in this documentation, with a source link for every answer. Free, no API key, no signup.

A skeptical senior-engineer code reviewer over MCP: risk-scans unified diffs, flags AI-generated-code tells, reports complexity hotspots, scans for leaked secrets, and runs an OWASP security pass — real analyzers, no external APIs. Free tier, no signup.

A fully free linter for agent skill files: lint_skill validates YAML frontmatter, structure, size budgets, and safety phrasing with a pass/fail verdict; packaging_check validates zip layout against marketplace rules; plus regex_test, json_validate, diff_texts, and cron_explain for skill authors. No license or account required.

Scan any website or MCP server for agent readiness: 0-100 score, a fix per failing check. Free.

49 deterministic tools for text integrity, agent control, and contextual quality evidence.

AgentReady.market audit: can an AI shopping agent find, understand and BUY on this store? /100.

Rule-based site audits: accessibility, SEO, security headers, performance. Metered per call.

Post-scrape data cleaner, no LLM: repairs mojibake, HTML, invisible chars. Plus a verdict.

Exposes FEDLIN's public security scanners as agent-callable tools over Streamable HTTP.

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