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api.hergertsynthora.com v1 tx-simulator
https://api.hergertsynthora.com/v1/tx-simulator
answers 402
SYNTHORA tx-simulator: simulate an EVM transaction before signing — SAFE/WARN/DANGER verdict, decoded intent, warnings and checks performed. Pre-trade safety for agent wallets. $0.03 USDC x402 Base.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.03
- Network
- base
- Pay to
- 0xEf879BFD6C4AccB8F795136de90246e1EC245e06
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 225 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-09-06T01:18:45.349Z (2h ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.hergertsynthora.com%2Fv1%2Ftx-simulator"