"All items" matching MCP connectors:

Screwtape.ai decides whether an AI agent is allowed to spend money, and keeps the proof. Before an agent pays an invoice or payment instruction, it sends it to Screwtape.ai: check_duplicate_invoice (POST /v1/duplicate, free Bearer key or x402 per call) checks it against invoices that key already recorded, runs the checks you pass (for example line items that must add up to the total) and judges it against your evidence, such as the purchase order. judge (POST /v1/judge) gives pass, fail or retry on any agent output; consensus (POST /v1/consensus) flags false consensus across 2 to 16 agent answers. Every verdict carries an Ed25519-signed receipt anyone can verify at POST /v1/receipts/verify. judge and consensus can be paid per call with x402 ($0.005 USDC on Base or Solana, no account); a free key gives 10 calls per UTC day.

UI VerifyA

ai.uiverify

UI Verify is visual regression testing built for coding agents. Connect the MCP server and your agent (Claude Code, Cursor, Codex) pulls a pull request's UI changes into the conversation, views each visual diff, reads the AI judge's verdict of regression vs intended change, and accepts the intended baselines - all over MCP.

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

Check public web pages for common WCAG 2.2 accessibility issues from your MCP client. The free scan_url tool needs no account and returns a score, severity breakdown, WCAG references, affected elements and fix guidance. Automated checks do not establish conformance; manual review is still required. Optional authenticated tools support monitoring your own sites. Documentation: https://allyproof.com/docs/mcp

Real MCP handshake witness graded per-client, signed expiring receipt.

Pays your endpoint like a stranger would and signs a checkout conformance verdict.

Read verification codes (OTP) and test email sent to your catch-all test hostnames.

Read your Yellowhead Diagnostics, scans and action items in an AI assistant, and start Diagnostics.

img alt attribute count, markup discarded

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/

All 36 Edge Thirteen MCP tools (SEC filings, WCAG, entity diligence, more) in one endpoint.

Format-true synthetic test data for 90 countries — IBANs, SWIFT/BIC, IDs, cards, all certified.

Independent preview-URL QA for coding agents. Playwright heuristics, pass/fail pack.