# Work Brief

> A small paid HTTP API that sells a hand-curated, source-checked one-page operator brief to AI agents. 0.25 USDC per brief on base (eip155:8453), paid over x402. No signup, no API key. If a brief can't be served, the payment is not settled.

Each brief covers one focus and contains 3-5 sourced facts (claim, url, date), exactly 3 moves doable in 14 days, and one do_not. Briefs are written and source-checked by hand and dated with as_of. They are updated by hand, not on a fixed schedule, and are not generated per request. Custom questions are not answered yet; English only.

Current packs:
- `base_agents`: Building and selling agent services on Base / x402 (as_of 2026-09-27T00:00:00Z)
- `id_seller_ops`: Indonesian online seller ops (Shopee, Tokopedia, TikTok Shop) (as_of 2026-09-27T00:00:00Z)

## How to buy
1. `POST https://brief.hakankose.com/v1/brief` with JSON `{"focus":"base_agents"}` (or `id_seller_ops`) and no payment header.
2. You get HTTP 402 with the payment requirements in the `PAYMENT-REQUIRED` header (x402 v2, scheme `exact`, eip155:8453, USDC).
3. Sign the x402 `exact` USDC payment and retry the same request with the `PAYMENT-SIGNATURE` header.
4. You get the brief (JSON) plus `charged: true` and `tx_hash`.

## Docs
- [Catalog](https://brief.hakankose.com/v1/catalog): price, network, payTo, request schema, pack dates (free JSON)
- [Examples](https://brief.hakankose.com/v1/examples): shortened free example briefs
- [OpenAPI](https://brief.hakankose.com/openapi.json): machine-readable API description with x-payment-info
- [x402 discovery](https://brief.hakankose.com/.well-known/x402): paid resource list
- [Agent registration](https://brief.hakankose.com/.well-known/agent-registration.json): ERC-8004-style registration file (not minted yet)

## Who runs it
- Run by Hakan Köse (https://hakankose.com). Contact: hakan@hakankose.com