← All endpoints
the-composer.fly.dev tx build
https://the-composer.fly.dev/tx/build
answers 402
Build one unsigned transaction from an IDL instruction
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- 2000 atomic
- Network
- solana
- Pay to
- WzMaL78srutrF6CsxEkWuhMaDF5HZA6jNRaEPengqpb
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 76 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-09-06T01:21:04.844Z (37d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fthe-composer.fly.dev%2Ftx%2Fbuild"