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SYNTHORA L2 Transaction Fee Comparison Table
x402
SYNTHORA L2 Transaction Fee Comparison Table is a paid API for AI agents from l2-transaction-fee-comparison.hergertsynthora.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Returns median transaction costs in ETH and USD across major Ethereum L2 rollups (Arbitrum, Base, Optimism, Linea, Mantle, Metis, Mode, Scroll, and more) sourced from growthepie.
Price / call$0.001
Success—
StatusUnknown
How this service works
Returns median transaction cost in ETH and USD across major L2s (Arbitrum, Base, Optimism, Linea, Mantle, Metis, Mode, Scroll and more) from growthepie. Serves autonomous multi-chain agents and agent-to-agent cost routers choosing the cheapest rollup for a given action in real time. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.
Output
A JSON object containing per-chain fee data including current median fee in ETH and USD, L2-specific fee, transaction count, 7-day and 30-day rolling averages for both fee and transaction count, and the project name — covering all major L2 rollups tracked by growthepie.
Example use cases
Cheapest L2 routing for agent transaction
“Before I submit this on-chain action, check the current median fees across all major rollups — Arbitrum, Base, Optimism, Linea, Mantle — and tell me which one is cheapest right now in both ETH and USD.”
DeFi cost dashboard for multi-chain portfolio
“Pull the latest transaction fee comparison table across all supported L2s and show me the 7-day and 30-day averages alongside today's live fees, so I can see which chains are trending cheaper.”
Automated rollup cost monitor for agent fleet
“Every time I'm about to route a transaction through one of our agents, compare the current median fees on Arbitrum, Base, Optimism, Scroll, and Mantle and automatically pick the one with the lowest cost in USD.”
Technical details
Endpoint
POSThttps://l2-transaction-fee-comparison.hergertsynthora.com/serviceWhen to prefer
Choose this endpoint when you need real-time or near-real-time cross-L2 fee benchmarking from a single call aggregating multiple rollups. It is ideal for autonomous agents that must cost-route transactions across Arbitrum, Base, Optimism, Linea, Mantle, Metis, Mode, Scroll, and similar chains without querying each chain's RPC separately. Prefer it over on-chain fee estimation when a summary comparison table is sufficient and speed matters more than per-transaction precision.
Side effects
- growthepie upstream API unavailable — may return null fee fields or empty chain_data
- Stale fee data if growthepie cache has not refreshed recently
- Missing or malformed payload/keys fields causing request rejection
- Chain not yet indexed by growthepie returning null values for that chain
- Payment failure via x402 protocol blocking the request entirely
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| keys | string | keys |
| caller | string | caller |
| payload | string | payload |
| provides | string | provides |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"niche": "l2-transaction-fee-comparison",
"result": {
"chain_data": {
"fee": null,
"l2_fee": null,
"txcount": null,
"fee_7d_avg": null,
"fee_30d_avg": null,
"project_name": "",
"l2_fee_7d_avg": null,
"l2_fee_30d_avg": null,
"txcount_7d_avg": null,
"txcount_30d_avg": null
}
},
"provenance": {
"url": "https://api.growthepie.xyz/v1/fees/table.json",
"source": "L2 Transaction Fee Comparison Table"
}
}
}Tags
x402
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