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Avasis Ethereum Gas Tip Feed
x402
Avasis Ethereum Gas Tip Feed is a paid API for AI agents from agents.avasis.ai, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).
Returns real-time Ethereum mainnet gas fee data (base fee, gas price, max priority fee, suggested max fee) and latest block info from a single batched RPC call, refreshed every 4 seconds.
Price / call$0.002
Success—
StatusUnknown
How this service works
Ethereum mainnet gas tip for agents that send transactions: latest block number and age, base fee, eth_gasPrice, eth_maxPriorityFeePerGas and a suggested maxFeePerGas (2x base fee + priority), from one batched RPC call every 4 s. Long-poll with ?since=<seq>&wait=25. Prepaid meter price $0.0002/call (packs at /v1/meter); SSE at /v1/stream/tips.
Output
A JSON object containing: a sequence number, chain info (name 'ethereum', chainId 1), gas values in gwei (baseFee, gasPrice, maxPriorityFee, suggestedMaxFee where suggestedMaxFee = 2×baseFee + priority), latest block number and age in seconds, data age in milliseconds, a stale boolean, a changed boolean, and an observedAt ISO timestamp.
Example use cases
Pre-transaction gas estimation for DeFi bot
“Before I submit this Ethereum swap transaction, check the current base fee, max priority fee, and suggested maxFeePerGas so I can set the right gas parameters and not overpay or get stuck.”
Real-time gas alert in trading pipeline
“I want to long-poll for ETH gas updates starting from sequence 812 — notify me as soon as the base fee changes so my trading agent can react immediately.”
Gas fee dashboard for on-chain agent fleet
“Fetch me the latest Ethereum mainnet gas tip — base fee, gasPrice, maxPriorityFee, and the 2x-base suggested maxFeePerGas — along with the current block number and how many seconds old it is.”
Technical details
Endpoint
GEThttps://agents.avasis.ai/v1/tip/eth-gas?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent or automated system needs to price Ethereum mainnet transactions in real time with minimal latency, especially when polling for changes (long-poll support via ?since=&wait=). Ideal for DeFi bots, gas optimization pipelines, and on-chain agent fleets that need a single batched call covering all fee components. Prefer over raw RPC calls when you want pre-computed suggestedMaxFee and a freshness indicator in one metered call.
Side effects
- Stale data: if the Ethereum node is lagging, stale:true is returned and blockAgeSeconds may be high
- Long-poll timeout: if no update arrives within the wait window, the last known data is returned
- Payment failure: x402 payment not accepted results in 402 response with no gas data
- Invalid since parameter: malformed sequence number may return an error or ignore the parameter
- Network outage: upstream RPC provider unavailability causes delayed or missing responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"seq": 812,
"data": {
"gwei": {
"baseFee": 0.41,
"gasPrice": 1.41,
"maxPriorityFee": 1,
"suggestedMaxFee": 1.82
},
"chain": "ethereum",
"chainId": 1,
"blockNumber": 23700000,
"blockAgeSeconds": 5
},
"ageMs": 420,
"stale": false,
"topic": "eth-gas",
"changed": true,
"observedAt": "2026-10-29T12:00:00.000Z"
}
}Tags
x402
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