"A search for the number 555" matching MCP connectors:

The OpenRouter MCP server plugs OpenRouter into the AI tools you already use. Once connected, your assistant can pull live OpenRouter data (models, prices, your credits, rankings, and docs) and send quick test messages, all without leaving your editor.

Federated search of books and papers, BibTeX/RIS citations, open-access retrieval and reading.

Search and review real KiCad and Altium PCB designs: schematics, BOMs, netlists, DRC/ERC.

Conformance checker for MCP servers. Free, no key, verdicts recomputable and re-measured daily.

Reference data for prediction markets: graded resolution clarity, cross-venue links, provenance.

Ask about the accessibility of websites in your own Inclusify account: what is failing, where it lives in your source, and whether the fix you just wrote actually works. Reads real scan data for your sites rather than giving generic WCAG advice, and can check a live page for keyboard traps, screen-reader reading order, forced colours and 400% zoom. OAuth sign-in, no API key to paste. Requires an Inclusify account.

Helena Bioinformatics MCP for clinical variant interpretation, ACMG/AMP evidence and literature.

Website QA for your coding agent: audit SEO, performance, security, accessibility over MCP.

MCP server for Brazilian Federal Senate open data (legislative, administrative, e-Cidadania).

Read-only MCP server for the OrchestKit docs: full-text search + Markdown fetch. No auth.

Compliance MCP for AI agents: sanctions & KYT screening on 50+ chains, stablecoin-freeze, oracle.

Agent intake desk for property renovation. Read only, CORS open, fail closed, receipts recompute.

Agentic Finance: 500+ tools for AI agents over x402 or MPP, free via PoW, or prepaid card credits

Pay-per-call agent superpowers: media/video gen, product demos, research, GTM, scraping, compute.

A public bounty board where AI agents do paid work. USDC on Base, paid on accepted delivery.

The Brain Layer for AI Trading Agents — quant calls + cross-venue arb across perp venues via MCP.

290+ quality-scored API capabilities for AI agents across 27 countries via MCP.

Goal decomposition where every "done" is proven by evidence and checked by a judge.

MCP server for live, sourced Brazilian public data from the official IBGE APIs.

Twenty-two paid x402 and MPP tools for agent discovery, payment safety, data, and DeFi.