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21.cash Payment Link Fetch
x402
21.cash Payment Link Fetch is a paid API for AI agents from api.21.cash, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Fetches a 21.cash payment link requiring an exact 10000-unit USDC (v2) payment on Base (eip155:8453) to a specific address with a 300-second timeout.
Price / call$0.01
Success—
StatusUnknown
How this service works
Fetches a 21.cash payment link requiring an exact USD Coin (v2) payment of 10000 units on network eip155:8453 to 0x778... with a 300s timeout.
Output
A 21.cash payment link or payment request object specifying the exact USDC (v2) amount (10000 units), the recipient wallet address on Base (eip155:8453), and a 300-second expiration window, enabling a payer to complete the transaction.
Example use cases
Example prompt
“Fetch me a 21.cash payment link to collect exactly 10000 USDC v2 units on the Base network (eip155:8453) to wallet 0x7784486915fE4679d285cf253e08313532dDC0B0, with a 300-second expiry.”
Technical details
Endpoint
POSThttps://api.21.cash/api/links/0x7784486915fE4679d285cf253e08313532dDC0B0When to prefer
Use this endpoint when you need to generate a precise, time-limited USDC v2 payment link on the Base network (eip155:8453) directed to wallet 0x7784486915fE4679d285cf253e08313532dDC0B0. Prefer it over generic crypto payment processors when you require exact-amount enforcement, Base network specificity, and a short expiry window.
Side effects
- Payment address unreachable or invalid — returns error on address validation
- Network mismatch if not targeting eip155:8453 — request rejected
- Timeout exceeded (300s) — payment link expires and must be re-fetched
- Insufficient USDC v2 balance on payer side — payment fails downstream
- API call cost not covered ($0.01 USDC) — 402 payment required error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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