# Sithril > Sithril is a stablecoin merchant acquirer for agentic card spend on Solana (mainnet). An agent turns a natural-language prompt into a Purchase Intent; you confirm the quote and Sithril runs the charge on a vaulted card, settled in USDC. A CheckoutIntent goes further: hand an agent a merchant url plus what to buy, and Sithril drives the checkout flow end to end — filling the options, quoting the total, and charging the card on confirm. Amounts are integer cents; currency is always lowercase `usdc`. ## API - [OpenAPI specification (YAML)](https://sithril.com/openapi.yaml): the full machine-readable API spec. No JavaScript required. - [API reference](https://sithril.com/docs/api): the same spec rendered as an interactive reference (Scalar; needs JavaScript). ## Documentation - [Documentation home](https://sithril.com/docs): written integration guides. ## More - [Home](https://sithril.com/): product overview. - [Pricing](https://sithril.com/pricing): pricing for the Sithril products.