"An open-source relational database management system" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Check an A2A agent before you delegate, or an MCP server's measured conduct. Free, no key.
Disposable, receive-only email inboxes for AI agents. Create an address, wait for the verification email, and get the one-time code or magic link back as structured fields. Long-polling wait_for_email with sender and subject filters, attachments, sanitised HTML, and restore for later password resets. OAuth 2.1, hosted in the EU, cannot send email.
Behind Second Look (preview): a shop's product page as clean data, source checks, price history.
Review supplied AI claims and source excerpts for quote mismatches, broken references and evidence gaps. MCP-native free_trial_status/free_trial: five attempts per network for the campaign, shared daily capacity. Paid checks are separate. No live retrieval or factual-truth certification; human review required.
Assign Linear, Jira or GitHub issues to an AI coding agent team that plans, builds, reviews, tests.
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).
Configure mobile bug reporting and investigate saved bug reports with your coding assistant. Manage apps and reporter settings, get Android/iOS/React Native setup guidance, and read report metadata, screenshots and logs. OAuth with an existing BugScreen account and workspace. Docs: https://www.bugscreen.app/docs/mcp
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.
Disposable email inboxes for AI agents: create an address, wait for mail, read OTP codes and links.
Create and manage test cases, test runs and results in Testiny from your AI assistant.
Diagnose why an AI agent failed and get the verified fix instantly. Free, no token.
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.
An open-source benchmark of how well LLMs solve nonogram puzzles, from 5x5 to 20x20.
Rule engine with built-in simulation. 55 MCP tools for complete business rule lifecycle management.
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.
Read visual design reviews captured on live web pages with the Website Feedback Tool Chrome extension: comments, CSS selectors, computed styles, console and network errors, and screenshots, so a coding agent can apply the fixes. Tool calls require the agent key from the extension (Connect AI agent) as an Authorization: Bearer header.
Does an MCP server work for a stock client? By registry name or URL. Tool drift too. Free, no key.
Create and evaluate versioned decision models with reproducible results and declared assumptions.
Free open check: can an AI agent reach checkout on this store? Advisory; ARC stops before payment.
