Short-TTL idempotency keys so agent retries claim once and never double-apply side effects.
idempotency
retries
x402
+2
|How to pay
Pick whichever fits your workflow — you can switch any time.
Subscribe
Monthly billing
Free
Predictable monthly cost with included usage. Best for steady, high-volume traffic.
- Unlimited tools within plan limits
- One API key, billed once a month
- Cancel any time
Pay-per-call
Agent-native
$0.01 – $0.02 per call
Charge agents in USDC the moment they call a tool. No subscriptions, no signup — pay only for what you use.
- 2 priced tools available
- Settled in USDC on Base
- No account or API key required
Idempotency Key Vault gives agents a short-TTL claim/get store for safe retries. claim_key atomically checks-or-sets a key (default TTL 900s); get_key looks up without mutating. Namespace isolation is server-derived. No release_key in v0. Settled in USDC on Base (mainnet): claim_key $0.02, get_key $0.01.