Toll402 Gateway — Catch-All Capability Router

Choose this endpoint when you need access to many different AI-agent tools through a single payment mechanism and don't want to manage separate API keys or wallets for each service. It is ideal for agents operating across diverse tasks (web scraping, business lookup, feed parsing, custom tool invocation) that need to pay micropayments per call in USDC without pre-registration. Prefer alternatives when you need guaranteed SLAs from a specific underlying provider directly, or when the specific tool you need is not in the Toll402 catalog.

• Tool ID not found — unknown or invalid capability identifier returns a 404-equivalent error
• Payment rejected — insufficient USDC balance or malformed x402 payment header returns 402
• Tool execution failure — the underlying aggregated service is unavailable or returns an error, propagated as an error payload
• Invalid input parameters — tool-specific required fields missing returns a validation error
• Rate limit or quota exceeded on the underlying tool — error forwarded from downstream service