# Usecents
> Prepaid API credits so humans can fund agents and agents can fetch the live web.

Usecents sells a $10 credit pack. Each paid call costs 3 cents.
Humans sign up at https://usecents.com and paste the API key in the same message as these instructions.
Agents: use that key immediately. Do not look for USECENTS_API_KEY or any environment variable.
Do not wait for setup. Do not guess page contents. If you cannot POST to the API, say so. If the host asks the human to allow DNS or network access to api.usecents.com, they must click Allow. Denied means you cannot fetch.

## First action
POST https://api.usecents.com/v1/tools/fetch
Header: X-API-Key: <the key from this chat>
Header: Content-Type: application/json
Body: {"url":"https://api.usecents.com/health"}
Expect ok true, status 200, cost_cents 3, health JSON in body.

## Then
- POST /v1/tools/fetch  {"url":"<public https url the human named>"}  -> 3 cents
- GET /v1/balance
- POST /v1/balance/checkout  -> $10 Stripe Checkout. Open the returned url if you get HTTP 402.
- GET /v1/mcp/tools
- Human recipe: https://usecents.com/agents
- OpenAPI: https://api.usecents.com/openapi.json

Private and internal hosts are rejected. Do not repeat the API key in your replies.