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Base Transaction Cost Estimator
x402
Base Transaction Cost Estimator is a paid API for AI agents from x402-data-api.bodhinindustries.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Estimates the gas cost of a transaction on Base L2, returning gas units, effective gas price, ETH cost, and USD cost computed live from the chain with no third-party data.
Price / call$0.01
Success—
StatusUnknown
How this service works
Self-computed Base onchain toolkit for AI agents: ERC-20 safety scan, manipulation-resistant TWAP price oracle, gas/fee oracle, calldata decoder, token/address/contract intel, wallet approval-risk audit, and batch token triage — all computed live from raw Base chain, no third-party data.
Output
Returns the estimated gas units, effective gas price in Gwei, expected cost in ETH and USD (using a self-computed ETH/USD price), the Base block height at time of computation, whether the transaction would revert, the revert reason if any, and a flag confirming no third-party data was used.
Example use cases
Example prompt
“Before I submit this contract call on Base, can you estimate the gas cost — the target is 0x1234...abcd, the calldata is 0xa9059cbb..., and my wallet is 0xabc...def — tell me the gas units, ETH cost, USD cost, and whether it will revert?”
Technical details
Endpoint
GEThttps://x402-data-api.bodhinindustries.workers.dev/txcostWhen to prefer
Use this endpoint when you need a live, self-computed gas cost estimate for a Base L2 transaction without relying on any external price feeds or third-party oracles. It is ideal for pre-flight transaction checks, cost budgeting, revert detection, and building autonomous agents that need trustless fee estimation directly from the Base chain.
Side effects
- Missing 'to' parameter returns a 400 error
- Transaction simulation reverts — willRevert is true and revertReason is populated
- Invalid address format causes estimation failure
- Calldata that triggers out-of-gas errors returns null gasEstimate
- Network congestion on Base may cause delayed or stale block data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| torequired | string | Target address of the transaction. |
| data | string | Calldata hex (omit for a plain ETH transfer). |
| from | string | Sender (msg.sender) — recommended for accurate estimates. |
| value | string | ETH value in wei (integer string). |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| to | string | target |
| from | string | sender (or null) |
| block | integer | Base block height |
| chain | string | base |
| ethUsd | number | self-computed ETH/USD |
| costEth | string | expected cost in ETH (or null) |
| costUsd | number | expected cost in USD (or null) |
| valueWei | string | value in wei |
| computedAt | string | ISO-8601 timestamp |
| willRevert | boolean | estimateGas reverted |
| gasEstimate | string | gas units (or null) |
| gasPriceGwei | number | effective gas price used |
| revertReason | string | revert reason (or null) |
| thirdPartyDataUsed | boolean | always false |
Tags
x402
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