"MCP servers that work without API keys" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Design quality gate for AI-generated UI: score any URL on 45 deterministic checks, A–F grade.
Generate synthetic random user data for testing, demos, and development without using real persona.
Verify before the agent pays. Screwtape is an independent check on agent work before a payment goes out: invoices, duplicate invoices and reconciliation, with a signed receipt for your auditor. It is independent of your agent's own model and vendor, with no stake in your agent passing. - judge: pass, fail or retry verdict on one agent output, with a score, reasons and a next_step. Optional deterministic checks: required fields, types, formats, sums, regex. - check_duplicate_invoice (/v1/duplicate): opt-in duplicate-invoice check using keyed fingerprints. - consensus: scores agreement across 2 to 16 agent answers and flags false consensus. - Advisory mode: recommends approve, review or return; a person decides. - Receipts: Ed25519-signed. The receipt proves what was checked, when, and the verdict. Verify via POST /v1/receipts/verify or offline; export via GET /v1/receipts/export. - Judged content isn't stored unless you opt in. Free key: 100 calls/day. Or $0.005 USDC per call via x402 on Base or Solana, no key needed. MCP: https://screwtape.ai/mcp Docs: https://screwtape.ai/docs/ Icon: https://screwtape.ai/icon-512.png Tags: verification, evaluation, llm-as-judge, invoices, receipts, x402
Test inboxes for your app's sign-up and login emails: get the code or link, or why none came.
HefestoAI checks AI-generated code before you ship it.
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.
Test a web app in a real browser from plain English. Passed, failed or cannot verify, with evidence.
Load testing and synthetic monitoring platform: test with Playwright, Browser Bot, or Protocol Bots.
Is your website ready for AI agents? 0-100 score, A-F grade and fixes. By Crypto Money Maker
Fact-check LLM outputs with cited sources. API key: aihcc.cloud/keys.
Web animation accessibility MCP: GSAP, static CSS checks, prefers-reduced-motion, WCAG 2.2.2/2.3.3.
Run accessibility, contrast, and design token audits and file QA issues from your AI coding tool.
Your agent verifies its change before commit; PR review that knows what depends on your change.
Benchmark your own prompt on 100+ models with real API calls, then choose the winner by accuracy, cost, speed, or any mix of those.
Authorized security scans, evidence, fix prompts and retests for AI-built web apps.
Verify an artifact an AI agent produced — schema, emptiness, provenance and mandate authority — before you accept the work or pay for it. Ed25519-signed and verifiable without this service; 20 checks a day free, then 0.005 USDC per call over x402.
Security scans for AI-built web apps, starting with Lovable. Verify ownership, run authorized scans, inspect findings, get AI-ready fix prompts and request retests. Uses OAuth with a Guarita account. Fix prompt access follows the account plan.
Pre-launch website QA: deterministic rule-based scans, readiness score, and blockers for agents.
Runs an eight-stage isolation test against your staging Supabase and issues a signed attestation. Needs a RowAttest API key: Authorization: Bearer rak_... (create one on the API keys page in the app).
Assign Linear, Jira or GitHub issues to an AI coding agent team that plans, builds, reviews, tests.
