# aptu.dev

aptu.dev is machine-payable API infrastructure for autonomous agents.
Instant per-call settlement via x402 using USDC on Base and Solana.

## Endpoints

- [x402 manifest](https://aptu.dev/.well-known/x402): x402 discovery manifest
- [catalog](https://aptu.dev/v1/catalog): JSON endpoint catalog
- [OpenAPI](https://aptu.dev/v1/openapi.json): OpenAPI 3.1 document
- [x401 probe](https://aptu.dev/v1/x401-probe): free x401 draft-0.2.0 demand probe (401 + PROOF-REQUEST)
- [rss.xml](https://aptu.dev/rss.xml): RSS 2.0 changelog feed of paid endpoint and price changes
- [llms.txt](https://aptu.dev/llms.txt): site summary for machine readers
- [llms-full.txt](https://aptu.dev/llms-full.txt): full-content companion
- [terms](https://aptu.dev/terms.txt): service terms (plain text)
- [skill.md](https://aptu.dev/skill.md): agent skill description
- [ard.json](https://aptu.dev/.well-known/ard.json): ARD v0.91 agent discovery manifest
- [webmcp.json](https://aptu.dev/.well-known/webmcp.json): WebMCP tool manifest
- [agent card](https://aptu.dev/.well-known/agent-card.json): A2A agent card (transport: POST /a2a)
- [req-resolve](https://aptu.dev/v1/req-resolve): paid Quebec enterprise registry (REQ) lookup by NEQ or name