Fieldcast Buyer Agent
An AI agent that pays for API data only after verifying the fields are in the document, spending from an on-chain budget vault on Arbitrum.
Video
Công nghệ sử dụng
Sự miêu tả
Fieldcast Buyer Agent is an AI agent that buys document extraction from a paid API (x402) only when the data it needs is actually in the document. A free regex pass runs first; then a model must quote each missing field and the code checks that the quote really occurs in the text. Only then does it pay. On Arbitrum, spending is gated by AgentBudgetVault: per-call cap 0.02 USDC, daily cap 0.10 USDC, and a float cap so the agent wallet cannot hold a working balance. Each release emits an evidence hash of the decision. The model cannot override any cap.
Tiến độ hackathon
Built during the buildathon (September 2026): AgentBudgetVault.sol (Ownable2Step, per-call / daily / float caps, allowlisted payee, evidenceHash event), Foundry tests 20/20 with 100% line and branch coverage, deploy script, buyer support for Arbitrum Sepolia with vault release and fund flow, gate accepting eip155:421614, demo video. Vault 0x2c48d7f3bd378d64b0ebe7f85d3ae94fcf3d004c on Arbitrum Sepolia. Demo run: skip on a document without the fields, then vault release tx 0x940965bf323e56f938d96663d24043ca5988548feb3841234e10a6a954a0d86d and x402 payment tx 0x2c98152a0ee5e826de3ec383171fb91ebd09d957685358be3b0bf80bfbaaf3ad. The Base buyer agent and x402 gate existed before the buildathon. Testnet only, both wallets are ours, no outside users yet.
Trạng thái huy động vốn
Not raised. Solo builder, bootstrapped.