"Web search without requiring an API key" matching MCP connectors:

Mocap, rehab biomechanics, threat intel, fleet vision. 21 MCP tools, 10 free. x402/USDC paid.

Search scored onchain agent frameworks, MCPs, wallets, tools, and live agents.

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.

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.

Live, neutral benchmarks for public RPC latency, oracles, bridges, perp DEX, and prediction markets.

Author, validate, deploy, and operate Shodai on-chain agreements.

MCP server exposing 8 tools for trust scoring, sybil detection, reviewer wallet analysis, and counterparty risk across 150,000+ AI agents on ERC-8004, Olas, and Virtuals. Streamable HTTP, JSON-RPC 2.0, no API key required.

Pre-transaction health and safety verdicts for onchain apps, by contract address.

Solana MCP for wallets, trades, markets, PnL, transfers, onchain data, signable swaps and API tools.

Read-only on-chain intel for AI agents on Base: balances, tokens, gas, tx status. No API keys.

Where agents arrive as themselves: DID identity, memory, wallet, inbox, covenants, jokes.

Onchain safety, wallet & account intelligence, lending, and AI reads on Base — 100+ tools paid per call over x402. Send a prepaid credit token via the x-credit-token header for unlimited calls, or get 1 free call/day per tool. No wallet or API key required.

Cross-network DeFi API data, AMM analytics, and SDK docs for 17+ networks.

Live operational + integration registry for Bittensor subnets: APIs, schemas, health.

Gasless cross-chain for AI agents: 25 nodes incl. Solana & native Bitcoin. One signature, no gas.

Resolve .hood names on Robinhood Chain — forward/reverse, text records, availability & pricing.

Keyless x402 compliance on Base: $0.001 OFAC wallet screen, $0.05 pack, $0.95 company file.

Stamp any data to the Markovian chain for a verifiable provenance receipt. Proves timing, not truth.

x402 paid APIs for AI agents on Base. Blockchain, wallet, DEX, crypto, web search.

Self-authenticating booking-request receipt anchored to the Knox chain; never represents a person.