"Free Network Graph Visualization Tools (No Account Required)" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Conformance checker for MCP servers. Free, no key, verdicts recomputable and re-measured daily.
Lint a SKILL.md for frontmatter, structure, secrets and size. All 6 tools free.
Risk-scan a diff, flag AI-generated-code tells, find secrets. 5 of 7 tools need no account.
Author and validate Calaf workspace seeds against the app's real importer. No account needed.
Workflow planning, recovery checkpoints, coordination, fixtures, and compatibility tools for agents.
Evidence-gated task verification for AI agents. Decompose goals into acceptance criteria, attach proof (screenshot, curl, file), independent LLM judge accepts or rejects. 24 tools. Hosted remote MCP (streamable-http, OAuth 2.1 + DCR).
Whether a registry MCP server works for a stock client, and what changed in its tools. Free, no key.
Free platform to test MCP clients without installing anything. Create mock tools with dynamic templates, configurable delays, conditions (if/then), and response sequences. Supports JSON-RPC 2.0 over Streamable HTTP. Built-in text_echo and json_echo tools. Rate-limited tiers: anonymous (5 calls/min, 1 mock tool), registered (10 calls/min, 4 mock tools), premium (60 calls/min, unlimited). Zero setup — no install, no registration required. More info: https://www.testmcp.dev
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.
AI-callable tools for API mocking, testing, monitoring, security, and automation.
Rule engine with built-in simulation. 55 MCP tools for complete business rule lifecycle management.
Seven tools over the tabnas parsing engine: parse, validate, diagnose, fixtures, compare.
Free tools: 2026 API shutdown scanner, small-business website auditor, photo resale estimator.
X-Z-CS AI validation with auditable reasoning. 8 active tools; 5 in maintenance. v0.5.62
Apache JMeter community documentation, conversion tools, linters, and calculators for AI agents.
Test FIX from Claude, ChatGPT, or Cursor: free sandbox FIX sessions or your own FIXSIM instances.
Verify structured artifacts, discover local tools and hand off immutable public state.
Checks whether generated Minecraft Bedrock content will actually load. Nine read-only tools.
Hosted browser for AI agents: screenshots, post-JS DOM, console, WCAG. No install, no API key.
Validates JSON against a JSON Schema, lists violations. x402 payment required (testnet USDC).
