The real catalog of tools for AI agents

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

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

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

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.

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

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

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

Paid token risk and security intelligence for AI agents over MCP with x402 payments.

Verify signed x402 payments; treasury-scoped settlement is irreversible.

Payment decisions, durable evidence, x402 resource discovery and live gateway status for AI agents.

Preflight x402 payment compatibility with structured risk evidence and remediation guidance.

Trust filter for ERC-8004: only ~3.8% of x402 endpoints hit 5+ payers/30d. Free MCP; x402 upgrade.

Kaspa x402 agent payer — pay x402 v2 services on Kaspa (KAS) per call, no account or API key

PaymentOracle — ES256K-signed receipts for x402 payments on USDC+EURC (Base) and XRP+RLUSD (XRPL).

Calibrated intelligence via x402 (USDC Base). ERC-8004 #84581: 272 payments, 49 wallets.

DeFi yields, staking routing, semantic research & security intel via x402 micro-payments on Base