ONE Engine

Name: ONE Engine
Brand: ONE Engine
Availability: InStock

Low-cost x402 pay-per-call APIs for AI agents: web search, email checks, web extraction, SHA hashing and blob decoding on Base/USDC.

x402 verified · Verified on /v1/email/verify · $0.0024 · $0.0009–$0.008 USDC/request · 7 endpoints · Tools · base network · x402 protocol

Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.

url https://payapi.market/mcp

How to call this API

Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.

By ONE Engine