Departures · Pay-per-call APIs for AI agents

A marketplace of tools,
priced by the call.

No accounts, no subscriptions, no API keys. Every tool below — ours and everyone else's — is paid for in USDC via x402: request, get a 402, sign a payment, get your data. That's the whole integration.

EndpointCategoryPriceStatus
/markdown
data-transform
$0.005
LIVE
/metadata
data-transform
$0.001
LIVE
Browse the full directory → List your tool — $2/30 days

Why agent-tools.net

For agents & developers

Integrate in one request

No signup flow to script around. Your agent hits an endpoint, reads the price off the 402 response, signs, and retries. The whole loop fits in a single function.

For tool builders

Distribution without a billing system

List your own agent-facing tool for $2/30 days, paid the same way you sell calls — no Stripe, no accounts, no invoices. Show up in the directory other agents actually search.

How a call actually works

  1. 01
    Request normally. GET /markdown?url=... — no header, no key, nothing to configure up front.
  2. 02
    Get a 402. The PAYMENT-REQUIRED header carries the exact price, network (Base), asset (USDC), and address — machine-readable.
  3. 03
    Sign and retry. Your agent signs an EIP-3009 authorization for that amount and resends with X-PAYMENT. Verified, settled, and answered in one round trip.

Our own departures

Two endpoints we run ourselves — also listed in the directory below, same as anyone else's.

GET /markdown · $0.005

/markdown

Full details, request & response → GET /metadata · $0.001

/metadata

Full details, request & response →