Tool detail

onchain-gas

Returns next-block baseFee plus slow/med/fast priority-fee tiers (maxFeePerGas, maxPriorityFeePerGas) for a chosen EVM chain, live from chain state.

Categories: Onchain data

Use when

get current gas fee tiers for Ethereum, Base, Arbitrum or another EVM chain
estimate maxFeePerGas and priority fee before sending a transaction

Not for

not historical gas data - current next-block estimate only

Inputs

GET query param: network (enum: ethereum/base/arbitrum/optimism/polygon/bnb/avalanche, optional, default ethereum).

Admitted input schema

{
  "type": "object",
  "properties": {
    "network": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "enum": [
        "ethereum",
        "base",
        "arbitrum",
        "optimism",
        "polygon",
        "bnb",
        "avalanche"
      ],
      "description": "EVM network (default ethereum)."
    }
  },
  "required": [],
  "additionalProperties": false
}

Endpoint

Method: GET
URL: https://api.agentstools.dev/gas

Payment

Protocol: x402
Listed price: 0.005 USDC per request on Base
Payment method: exact
Network: eip155:8453
Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Directory: Coinbase x402 Bazaar
Record: GET https://api.agentstools.dev/gas
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z