The real catalog of tools for AI agents

Receipts-verified reviews of x402 services and paid APIs, before you spend.

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

Audits NEXUS's own x402 payment logs against its own delivery logs and issues a signed proof-of-deli

Buyer-side trust oracle + capped sessions for x402 agents: verified_route, receipts, 17 free tools.

Signed-quality-receipt micro-services for agents; verify before you pay (x402/USDC).

Record x402 agent purchases as reconciled, auditable receipts; verify any receipt on the ledger.

Verify claims, resolve FIGI identity, extract claims, and sign x402 delivery receipts over MCP.

Agent-native MCP for governed commerce, x402 payments, paid capabilities, and verifiable receipts.

x402 tools for MCP clients: pay exact/Starknet or STARK-receipt 402s, verify, JCS-hash. No account.

Fail-closed verify-before-you-act gate for AI agents. Signed receipts. Pay-per-call via x402.

Deterministic runtime enforcement of step order for AI agents: ALLOW/DENY before a step runs.

Verify a SCITT receipt under a trust root you hold — offline, no backend, no key, no network

Issue & verify signed (ed25519), hash-chained, timestamped provenance receipts for agent actions.

Which x402 pay-per-call endpoint delivered for a task at a price? Facts from our own paid calls.

Evidence-based commerce completion checks for agents. x402 paid calls and free standard metadata.

Cryptographically anchored evidence for agents: verified run receipts, proof-gated settlement.

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

MCP tools for x402 readiness, paid-path probes, launch packs, and trust receipts.

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

Contradiction-verified, freshness-SLA'd signed feed: per-record status + as-of date + receipt.