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402.com.tr x402 encode-selector
https://402.com.tr/api/x402/encode-selector
answers 402
Computes the 4-byte selector for a function signature (e.g. transfer(address,uint256) → 0xa9059cbb). The inverse of the decoder — useful for agents building or matching calldata.
We sent a real
GET request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.01
- Network
- base
- Pay to
- 0x973a31858f4d2125f48c880542da11a2796f12d6
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- GET
- Response latency
- 286 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-09-06T01:16:01.760Z (19d ago)
- Category
- data
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2F402.com.tr%2Fapi%2Fx402%2Fencode-selector"