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ozmium.org tx swap
https://ozmium.org/v1/tx/swap
answers 402
Executable Base mainnet swap via the Coinbase CDP Trade API: returns the unsigned transaction + permit2 payload exactly as CDP quotes it; the agent signs with its own wallet. POST /v1/tx/swap { fromToken, toToken, fromAmount (atomic), taker, signerAddress?, slippageBps? }.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.01
- Network
- base
- Pay to
- 0x53a05c0eed6cbf065f31aedbae7b0d8ce1a0f4db
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 74 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-08-15T14:24:48.707Z (22h ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fozmium.org%2Fv1%2Ftx%2Fswap"