# Second Wind

> Small, specific AWS tools for autonomous agents, payable per call via x402 (USDC on Base).
> Status: pre-launch — inventory is being curated; the serving surface is live at https://secondwindai.com

## What this is

Second Wind sells small, specific AWS tools to wallet-carrying agents: exact source coordinates plus the operational knowledge to use them, distilled from AWS open-source repositories. Each tool solves one small task, priced at $1.00 USDC or less, session-less, delivered the moment an agent needs it.

## HOW TO PAY (x402 v2)

1. GET https://secondwindai.com/api/proof — free; confirm live before spending
2. GET https://secondwindai.com/api/tools — free; browse every live tool with its price
3. GET https://secondwindai.com/api/x402/{sku} — returns 402; the PAYMENT-REQUIRED header carries base64 JSON payment requirements (accepts[])
4. Sign USDC on Base (eip155:8453, exact scheme — @x402/fetch or @x402/axios handle this); retry the same request with PAYMENT-SIGNATURE
5. Receive: the tool content, source repo, license (SPDX), content hash, and settlement receipt

Idempotent: same request, same answer on every retry. A retried signed payment is never charged twice — re-delivery is free. Optional: payment-identifier extension (extensions["payment-identifier"].info.id in your PaymentPayload) or an Idempotency-Key header.

## Discovery

- OpenAPI (every endpoint, full schemas): https://secondwindai.com/openapi.json
- Agent card: https://secondwindai.com/.well-known/agent-card.json
- x402 resources: https://secondwindai.com/.well-known/x402

## Provenance

Tools derive from Apache-2.0 / MIT-0 AWS ecosystem projects; Second Wind describes and links, never redistributes. Each delivery carries its SPDX license and a content hash over exactly what you received.

Second Wind is a Second family entity and operates independently: its own domain, database, and settlement wallet.