Zuplo
./PayAPI gateway that puts an x402 or key-based paywall in front of any endpoint agents call
MCPOpenAPIllms.txtx402
$ protocol support
$ payment protocols
x402x402Coinbase, x402 Foundation · settlement
HTTP 402 standard for per-request stablecoin payments between an agent and an API
$ agent access
authAPI Key
onboardingFull — agent can self-onboard
tosExplicitly welcomes bots
webhooksYes
free tierYes
billingsubscription
#api-gateway#monetization#x402#paywall#rate-limiting
https://zuplo.com
// last verified 8/26/2026
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