"How to look up websites using a search engine without APIs" matching MCP connectors:
GET /v1/connectors — MCP directory API referenceMatching Connector Tools:
Onchain Diary exposes its full knowledge base — 96 Web3 security articles and 220 glossary terms, in English and Chinese — through the Model Context Protocol. Any MCP-capable assistant can search it and read complete articles without scraping HTML.
Search scored onchain-agent tooling: frameworks, MCP servers, wallets, x402 rails, deploy specs.
Open AI Visibility Index for crypto and Web3. Weekly share-of-answer measurements for 24 tracked brands across ChatGPT, Perplexity and Gemini, from a frozen versioned prompt panel. Five read-only tools: full index, per-brand lookup, brand list, complete measurement history and methodology. No auth, no API key. Data is CC BY 4.0 with a permanent archive of every weekly snapshot, so any figure can be verified independently.
Abstraxn Agent Kit gives AI agents instant access to real-time Web3, blockchain, and market data with no signup or API key. Access blockchain tools, crypto, wallet, ENS, transaction simulation, and travel APIs through one MCP server, with paid calls settled directly from the user's crypto wallet via x402—without Abstraxn holding or custodizing funds.
Anonymous broker: AI agents publish capabilities, negotiate, and form direct peer-to-peer deals.
Free, keyless MCP server with 50 read-only blockchain tools for Bitcoin, Ethereum, and Mezo. No installation, no API key required -- just add the URL to your MCP client and start querying balances, transactions, blocks, ENS names, ERC-20 tokens, smart contracts, and more. Runs on Cloudflare's global edge network via Streamable HTTP. All tools are strictly read-only and stateless.
Evidence-backed crypto due diligence with sources, freshness, and a runtime receipt on every call.
Live operational + integration registry for Bittensor subnets: APIs, schemas, health.
Free read-only discovery for a settlement-verified x402 API marketplace on Base.
Free, keyless MCP server with 50 read-only blockchain tools for Bitcoin, Ethereum, and Mezo. No installation, no API key required -- just add the URL to your MCP client and start querying balances, transactions, blocks, ENS names, ERC-20 tokens, smart contracts, and more. Runs on Cloudflare's global edge network via Streamable HTTP. All tools are strictly read-only and stateless.
Timestamp & verify evidence on-chain, free. Proofpack: a portable BEEF+BUMP proof bundle per txid.
A 1600×900 pixel billboard split into 14,400 blocks of 10×10 pixels, sold only over x402 for $1.00 USDC on Base — and only to machines. Humans may look. A purchase buys 100 pixels you control, a permanent public deed with your message and link, and a line in the Founding Machines registry. GET /blocks/next assigns the next open block; GET /blocks/{col},{row} buys a specific one.
Feed of x402/L402 services newly listed on 402index.io within a recency window (candidate #8, manual
Verifiable crypto signals, recorded history and always-on monitoring for AI agents via x402 on Base.
Risk-adjusted stablecoin yield ranks for other agents. Research only. Never holds keys or executes.
Reputation oracle for AI agents on Base: SAFE/CAUTION/BLOCK + 0-100 score before you pay. x402+MCP
Read the public Sup wire over hosted MCP, or use local clients to claim, send, and verify receipts.
The MCP-native bridge to ERC-8004 (on-chain agent identity/reputation/validation): resolve registrat
x402 pay-per-call APIs for AI agents on Base: site audits, llms.txt, wallet watch, prices, fetch.
Verifiable delivery for the agent economy: commit-reveal content notarization. Sellers commit to a d
