# SINTIA (SIN) Token Purchase - $5 USDC via x420.dev

> SINTIA (SIN) Token Purchase - $5 USDC via x420.dev is a paid API for AI agents from sin.x420.dev, paid per call via x402, $5/call, status unknown (last checked 2026-10-20).

Executes a $5 USDC purchase of SIN (SINTIA) tokens on-chain, returning swap and transaction details

## Facts

- Endpoint: GET https://sin.x420.dev/api/puff-5?utm_source=zero.xyz
- Price: $5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sintia-sin-token-purchase-5-usdc-via-x420-dev-c7e57062
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_K9yHgFZ9zMZ13Y7kU5txH

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-5-usdc-via-x420-dev-c7e57062
```

Example prompt: Buy me $5 worth of SIN (SINTIA) tokens using USDC right now through x420.dev.

## When to prefer this

Use this endpoint when you want to buy exactly $5 USDC worth of SIN tokens in a single call. Prefer the $1 sibling endpoint for smaller test purchases or when minimizing capital at risk. This endpoint is ideal for agents automating DeFi token acquisition with a fixed $5 budget per transaction.

## Known failure modes

- Insufficient USDC balance to cover the $5 purchase
- Payment authorization failure via x402 protocol
- On-chain swap failure due to liquidity or slippage
- Network congestion causing transaction timeout
- Invalid or missing payment header resulting in 402 response
- Smart contract error on token address 0x758af1c4B18A8bE92247B3Aec6a653aa2dAA3B07

## How this service works

Buy 5 USDC worth of SIN tokens 0x758af1c4B18A8bE92247B3Aec6a653aa2dAA3B07

## Output

Returns a confirmation message, the amount of SIN tokens received, the USDC amount paid, and optionally the send and swap transaction hashes for the on-chain operations.

## 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-5-usdc-via-x420-dev-c7e57062/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)