402.md
>_ Use Cases

Five Commerce Modes.
One Platform.

402.md handles every type of agent-to-business transaction. From $0.05 API calls to $99 product orders — each mode has the right escrow, settlement, and flow.

0h hold (instant)

API Pay-per-Call

Monetize any API endpoint with per-request USDC pricing. Agents call, pay, and receive the response — no API keys, no subscriptions, no rate limits.

POST api.402.md/skills/translate/analyze
→ 402 { amount: 50000 } // $0.05
PAYMENT-SIGNATURE: <proof>
→ 200 OK { "result": "Bonjour" }
Example: $0.05/call
24h escrow

SaaS Subscriptions

Sell time-based access to your SaaS product. Agents subscribe with USDC and receive a ticket granting access for the subscription period.

POST api.402.md/skills/analytics-pro/subscribe
→ 402 { amount: 49000000 } // $49
PAYMENT-SIGNATURE: <proof>
→ 200 { "ticket": "tkt_a9f",
  "accessUrl": "https://...",
  "expiresIn": "30d" }
Example: $49/month
72h escrow

Physical Products

Enable agents to purchase physical goods with shipping. 402.md holds funds in escrow for 72 hours, giving you time to fulfill the order.

POST api.402.md/skills/premium-widgets/buy
→ 402 { amount: 9999000 } // $99.99
PAYMENT-SIGNATURE: <proof>
→ 200 { "orderId": "ord_x7k",
  "shipping": "3-5 days" }
Example: $99.99 + shipping
0h hold (instant)

Content Paywalls

Monetize articles, reports, datasets, or any digital content with micropayments. Agents pay per piece — no subscription fatigue, no minimum readership.

GET api.402.md/skills/research-db/articles/42
→ 402 { amount: 100000 } // $0.10
PAYMENT-SIGNATURE: <proof>
→ 200 { "title": "...",
  "content": "<full article>" }
Example: $0.10/article
48h escrow

One-Time Services

Offer async services — design, writing, data processing — with escrow protection. Agents pay up front, you deliver within the hold period.

POST api.402.md/skills/logo-design/create
→ 402 { amount: 25000000 } // $25
PAYMENT-SIGNATURE: <proof>
→ 200 { "orderId": "ord_r2d",
  "eta": "24h" }
Example: $25/task
>_ Escrow by Mode

Smart Escrow Protects Both Sides

Each commerce mode has a hold period tuned to the delivery timeline. Instant for digital goods, longer for physical products — so buyers and sellers are both protected.

ModeHold PeriodSettlement
API Pay-per-Call0hInstant
Content Paywalls0hInstant
SaaS Subscriptions24hAfter hold
One-Time Services48hAfter hold
Physical Products72hAfter hold

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