A machine-readable HTTP API for AI agents and developers. One GET /history response returns a JSON record of a monitored public catalogue.
AI agents and developers that call paid HTTP APIs, and buyers that need a machine-readable record of changes in a public catalogue.
Features & Use Cases
- GET /history returns one JSON document
- coverage: targets observed, total observations, misses
- changes with UTC and JST timestamps
- latest observed facts per target
- HTTP 402 challenge states the price and payTo
- payment in USDC on Base (eip155:8453), scheme "exact"
- AI agents and developers that call paid HTTP APIs, and buyers that need a machine-readable record of changes in a public catalogue.
Full Review
x402 Catalog History is a practical ai agents option for teams that need to move from idea to execution without a long setup process.
The platform stands out for AI agents and developers that call paid HTTP APIs, and buyers that need a machine-readable record of changes in a public catalogue., and it is often most useful for operators who want a faster path to deployment than a larger, more customizable stack.
It is usually strongest when the need is clear and the team values speed over deep customization.
- AI agents and developers that call paid HTTP APIs, and buyers that need a machine-readable record of changes in a public catalogue.
- Teams evaluating ai agents tools
- Organizations that need extensive white-glove onboarding
- Teams that want deep custom automation beyond the core feature set
Pricing: Paid
Ready to try x402 Catalog History?
Visit the official site to explore plans, demos & free options.

