"Tools and methods for plotting graphs without an API key" 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.
Generate synthetic random user data for testing, demos, and development without using real persona.
Check an A2A agent before you delegate, or an MCP server's measured conduct. Free, no key.
Design quality gate for AI-generated UI: score any URL on 45 deterministic checks, A–F grade.
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
Lint a SKILL.md for frontmatter, structure, secrets and size. All 6 tools free.
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.
Risk-scan a diff, flag AI-generated-code tells, find secrets. 5 of 7 tools need no account.
Test inboxes for your app's sign-up and login emails: get the code or link, or why none came.
Check an online store's product catalog before you import it or send it to a shopping feed.
Audits any remote agent or MCP URL for JSON-RPC compliance, latency SLA, OpenAPI schema, and HTTP.
Live behavioral security verifier, schema auditor, and trust oracle for A2A, MCP & x402 agents.
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.
A webhook inbox for agents: one call returns a live URL. Mock, verify, inspect and replay.
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.
Fact-check LLM outputs with cited sources. API key: aihcc.cloud/keys.
Ensemble testing of web pages for accessibility, usability, and web standards
Web animation accessibility MCP: GSAP, static CSS checks, prefers-reduced-motion, WCAG 2.2.2/2.3.3.
See which AI models fall for traps in everyday jobs, and check or scan any MCP server, skill or package before your agent installs it. No sign-in; read-only; returns structured data.
