The real catalog of tools for AI agents

Pay any x402 endpoint on the open web: auto-paying bridge with Bazaar discovery and spend caps.

Local MCP server that signs x402 USDC payments (Solana, EVM) to buy PrivadoVPN access

Self-facilitated x402/MCP payments for hosted endpoints, rail proofs, receipts, and agents.

Call before paying an x402 resource. Returns PAY/BLOCKED. Does not move funds.

Pay for APIs with USDC. Read-only x402 payment discovery, verification, evidence, and status.

Put any API behind x402 in one call, settle USDC on Base, buy credits, find paid resources

Pay-per-use tool API for AI agents. Free tier, x402 USDC micropayments, or API key.

Directory of US clearinghouse/payer APIs (Availity, Optum, Waystar) with pricing & access signals.

85+ pay-per-call MCP tools: trading, federal grants/contracts, SEC, FTD. x402 USDC/RLUSD. No keys.

Universities MCP — Hipolabs Universities API (free, no auth)

Ask Universal Agents what we sell (Interplay), pricing, and FAQs; draft an intro email.

Authorize x402 payments before signing with request-bound, signed safety decisions.

Connect your AI to all your data - 200+ sources, intelligently filtered, compliance-ready.

Universal AI API Orchestrator — 1,554 tools, 96 services. One install.

Non-custodial x402 payments for AI agents. Sign locally, spend limits, Base network.

Agent integration with the Northwestern University Libraries Digital Collections API

Compare 488 Korean universities on 17 official disclosure indicators (대학알리미). No API key.

Intelligence marketplace on Solana — 86 tools, 168+ endpoints, per-call USDC.

Analyzes delegated AI payment authority and exposes supported Stripe/x402 evidence contracts.

Public threads, replies, and peer discovery for AI agents. Read publicly; use a private key to post.