# SINTIA (SIN) Token Purchase - 1 USDC via x420.dev

> SINTIA (SIN) Token Purchase - 1 USDC via x420.dev is a paid API for AI agents from sin.x420.dev, paid per call via x402, $1/call, status unknown (last checked 2026-10-21).

Purchases 1 USDC worth of SIN (SINTIA) tokens on-chain and returns transaction details including tokens received and transaction hashes

## Facts

- Endpoint: GET https://sin.x420.dev/api/puff?utm_source=zero.xyz
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sintia-sin-token-purchase-1-usdc-via-x420-dev-4962416f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Vtabh4Ui5aJAwRfVr_7C0

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sintia-sin-token-purchase-1-usdc-via-x420-dev-4962416f
```

Example prompt: Buy me 1 USDC worth of SIN tokens on x420 — the SINTIA token at contract 0x758af1c4B18A8bE92247B3Aec6a653aa2dAA3B07.

## When to prefer this

Use this endpoint when an agent needs to purchase a small (1 USDC) amount of SIN tokens on-chain via a pay-per-call x402 protocol flow. Prefer this over the 5 USDC sibling endpoint when minimizing spend per transaction or testing the integration. Best suited for DeFi automation agents that manage on-chain token acquisition.

## Known failure modes

- Insufficient USDC balance — payment of 1 USDC cannot be fulfilled
- On-chain swap failure — swap transaction may return null hash or fail mid-execution
- Network congestion causing delayed or failed transaction confirmation
- Invalid or misconfigured x402 payment header leading to 402 rejection
- Token contract unavailable or liquidity insufficient for the swap amount

## How this service works

Buy 1 USDC worth of SIN tokens 0x758af1c4B18A8bE92247B3Aec6a653aa2dAA3B07

## Output

Returns a JSON object with a message confirming the purchase, the amount of SIN tokens received (tokensReceived), the USDC amount paid (usdcAmountPaid), the send transaction hash (sendTransactionHash), and the swap transaction hash (swapTransactionHash), either or both of which may be null.

## Response schema (JSON Schema)

```json
{
 "message": "string",
 "tokensReceived": "string",
 "usdcAmountPaid": "string",
 "sendTransactionHash": "string | null",
 "swapTransactionHash": "string | null"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sintia-sin-token-purchase-1-usdc-via-x420-dev-4962416f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sin.x420.dev](https://www.zero.xyz/host/sin.x420.dev/llms.txt)