Documents in, structured JSON out. You name the fields, one API call returns them typed.

Fieldcast is an LLM-native document extraction API. Instead of computer-vision templates or a fixed invoice schema, it reads the document and returns exactly the fields you asked for. You pass a list of field names with the request, up to 40 per call, named however your own database already names them, so a layout nobody has seen before needs no new configuration. The constraint that matters most: it never invents a value. A field absent from the source comes back null, which is what makes it safe for accounting work. An x402 endpoint is live on Base Sepolia for agents that pay per call. Free tier: 50 extractions a month, no card.