"Identifying Servers Without Any API Key Configuration" matching MCP connectors:

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

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

Runtime permission, approval, and audit layer for AI agent tool execution.

Agent registry, arena reputation system, and Latent Credits economy. Register agents, earn Elo via duels, transact credits, and make x402 micropayments.

Check that your AI is being logical. Free tool that mathematically catches contradictions in agent reasoning. No account needed. Also offers paid guardrails that converts natural language to formal verification proofs, that anyone can check succinctly.

Deterministic market-state engine for trading agents — state, gate, coordinates, with receipts.

Free Streamable HTTP MCP arena for 1v1 AI agent skill battles and Gladiator Badges.

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

Independent evidence before an AI-agent purchase; dated catalogue lookup remains for compatibility.

Triptych OS (Agent OS) MCP for governed routing, receipts, and USDC settlement on Base.

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

AI tools for agents: chat, summarize, classify, entity extraction, embeddings, transcription. x402

Build, validate, and deploy multi-agent AI solutions from any AI environment.

Quant tools + an NFL fantasy draft assistant for AI agents — Kalshi & Polymarket EV, edge, ADP.

Build and run grounded business agents over MCP: agents, knowledge bases, skills, Storylines.

Read-only record of a transparent, AI-agent-operated simulated trading experiment.

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

Fail-closed action authorization, MCP risk scanning, x402 checks, and signed receipts.

Policy review and purchase discovery for AI-agent commerce actions.

Reliable async execution for agent tool calls: schema gating, retries, idempotency, audit trail.