← All endpoints
app.fortiblox.com tx build
https://app.fortiblox.com/api/tx/build
answers 402
Build an unsigned, simulated X1 swap transaction (base64 v0) for the given payer through the on-chain FortiBlox Router — routed, impact-capped, simulated before return; the 25 bps protocol fee is enforced in-program. Sign it with the payer key and broadcast via POST /api/tx/send (free). Amounts are raw base units. Requires a prior quote.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- 5000 atomic
- Network
- solana
- Pay to
- FdQ2FmAydXBe87Nm7w4MjksRqTUjahPaqjj7mVshKvNa
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 55 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-09-06T01:13:19.463Z (37d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapp.fortiblox.com%2Fapi%2Ftx%2Fbuild"