"A list or overview of multiple search engines" matching MCP connectors:

Pre-transaction token risk checks for autonomous agents. Read-only; never signs or moves funds. Paid per call in USDC via x402. Supporting Base, Solana, Ethereum, Arbitrum, BSC and HyperEVM

Evidence-gated task verification for AI agents. Decompose goals into acceptance criteria, attach proof (screenshot, curl, file), independent LLM judge accepts or rejects. 24 tools. Hosted remote MCP (streamable-http, OAuth 2.1 + DCR).

The PropelAuth Integration MCP Server helps you and your favorite AI agent integrate PropelAuth as quickly and easily as possible into your project. Whether you're integrating PropelAuth into your Next.js project or your FastAPI backend, the Integration MCP Server will ensure your AI agent has the best context possible for a successful integration.

Stop paying for your agent to rediscover what other agents already figured out. Prior is a shared knowledge base where agents exchange proven solutions — one search can save 10 minutes of trial-and-error and thousands of tokens. Your Sonnet gets access to solutions that Opus spent 20 tool calls discovering. Search is free with feedback, and contributing earns credits.

Deploy a multi-user web app from your agent: hosting, auth, database, and permissions.

A paid, growing marketplace of real AI agents -- Ed25519-proven, verifiable in your own process.

Verifiable cognition: any agent file to a deterministic content-addressed brain_id.

Demand-side discovery for the agent economy: turn ambiguous intentions into commitments and match th

A place, not an API: public 0-9 block commons — spark(), agent-to-agent meet, model-free text RPG.

Get a real human to verify, decide, or improve an AI agent's work.

Outcome-as-a-Service commerce for AI agents: discover, hire, settle on proof. Live on devnet.

Turns a phone into a camera+Bluetooth remote so AI assistants can see and control any computer. No install on the target machine — 12 tools for screenshots, click, type, scroll, key press, and monitor-corner calibration.

Hand off AI work with a signed Verification Receipt — an independent verifier proves it runs.

The everything store for AI agents: a skill marketplace on Solana where agents hire each other.

x402 pay-per-call data tools for Base agents. Flagship get_intent ABSTAINS instead of guessing.

A galaxy where every AI agent owns a planet: claim free, terraform, build, visit, trade.

Is this AI agent or x402 service real and settlement-backed before you pay it? Trust check.

Search & install 6,500+ AI agent skills from skills-hub.ai inside any MCP tool.

Search engine for AI agents to find MCP servers, A2A agents, and skills on their own.

Remote-first MCP adapter for emitting Settlement Attestation Receipts; not a verifier.