"Papers With Code" matching MCP connectors:

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

Live censorship, China economic, and tamper-evident AI evaluation tools with bounded analysis.

We buy from x402 endpoints with real USDC and publish delivery outcomes. Check before you spend.

Money, FX, capital-market and metadata-only China macro evidence with source clocks and limits.

~Alter is the identity layer agents query before they transact, answering who is actually on the other end. 11 of the 42 tools work with no account and no key. Call them now and see what comes back. Two calls plus a small proof of work gives your agent its own ~handle. Reads settle in USDC over x402 and 75% goes to the person read. Being known.

Search and cite US law from official sources, then form an LLC or nonprofit with free agent tools.

Check whether AI agents can read any website: 18 deterministic checks, each with its fix.

US federal contract recompetes with the incumbent named, awards by company, agency spend.

Live DNS lookups for agents: A/MX/TXT/SPF/CNAME/PTR with TTLs and DNSSEC, via Google Public DNS.

CLSTR reads 100,000+ articles a day from 40,000+ sources in 170+ countries and deduplicates them into single events, then links related events into ongoing situations with a maintained summary and a full timeline. An agent can answer what has happened over the last six weeks, not just what a single headline says right now.

Free US cleaning cost, time, crew, and chemical-use calculators with visual reports.

Entity resolution — data mapping, SDK code generation, docs search, and error troubleshooting

Free, open MCP server for The Urantia Papers. 197 papers, 14,500+ paragraphs, 4,400+ entities.

Scan code for quantum-vulnerable cryptography and get NIST post-quantum migration guidance.

Riddle.com is a no-code platform for quizzes, surveys, personality tests, prediction games, interactive graphics, and leaderboards. Use the MCP to create, edit and analyze content.

Bank and lender monitoring with historical-evidence limits and eligibility flags beside every claim.

Scores a business's online presence 0–100 and names the top issues to fix — search visibility, whether AI assistants can read and recommend it, speed and first impression, trust, and how easy the business is to reach. Give the scan_website tool a URL and it returns the score with the top issues, in chat. English and Arabic. By BottleTech (bottletech.net).

Manage websites, help documents and customer-support conversations with safe, scoped tools.

Connect Claude or any MCP client to Thread Otter, a GTM agent for founders. Free tools with no key: find_buyer_threads (give it a website URL and get recent Reddit threads where that product's buyers are asking for it, report in ~3 minutes), reddit_demand_board (weekly demand across 40 communities with thread receipts), and subreddit_rules (promotion posture for 2,000+ profiled subreddits). With an API key: read your buying-intent mentions across Reddit, X, LinkedIn, and Bluesky, check your pipeline, and propose posts and reply drafts in your voice. Propose-only by design: nothing sends without your approval flow. Keys at threadotter.com/connect.

32 creative AI tools (18 free) for agents: generate, upscale, mockup, print, watermark.