← The evidence ledger
Evidence row 2253766
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://agents.avasis.ai/v1/eth/fee-plan
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 35d86850ca22c540a7f24d556d4c91d5a86cf40bbbb6e91985157e15e5a157cb
- Leaf
- 0xbc3da31e13b601b3805c92329f834b12f09e35644d61b7a052b719e4bd0dcc49
What was observed
{
"endpoints": [
[
"x402",
"https://agents.avasis.ai/v1/eth/fee-plan"
]
],
"name": "Avasis Agent Platform",
"owner_address": "0x6264191d6dd5427435b5e829077842e130ef1fc8",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0x6264191D6dD5427435B5E829077842e130Ef1fc8",
"scheme": "exact"
}
],
"description": "Ethereum gas fee plan for ONE transaction ($0.02): give gas_limit (+ urgency low/normal/high/next_block, optional max_usd budget) and get the EIP-1559 fields to sign (maxFeePerGas, maxPriorityFeePerGas, hex ready_to_sign), expected + max cost in ETH + USD, blocks to inclusion, the other tiers, and a send_now / downgrade / wait decision with its reason from the latest block's fill. Free live sample /v1/evm/fee-plan/sample. Upstream down 503, never charged.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"gas_limit": 65000,
"urgency": "normal"
},
"type": "http"
},
"output": {
"example": {
"also_try": [
{
"free_sample": "https://agents.avasis.ai/v1/evm/gas-ops/sample",
"price_usd": "0.05",
"url": "https://agents.avasis.ai/v1/evm/gas-ops",
"what": "EVM gas ops kit: Ethereum gas + Base gas fee tiers (slow/standard/fast/urgent), EIP-1559 next base fee, USD cost per tx and for your gas_limit, Base-vs-Ethereum pick, plus Solana slot / priority fees / SOL-USD; one shot, $0.05"
},
{
"free_sample": "https://agents.avasis.ai/v1/evm/tx-precheck/sample",
"price_usd": "0.02",
"url": "https://agents.avasis.ai/v1/eth/tx-precheck",
"what": "Ethereum tx precheck: simulate YOUR unsigned transaction before you sign (would it revert + reason, gas in USD, every transfer, approval exposure, counterparty risk): SIGN / CAUTION / BLOCK"
}
],
"alternatives": [
{
"blocks": [
2,
10
],
"expected": {
"eth": 0.00005915,
"usd": 0.152637
},
"maxFeePerGas": {
"gwei": 0.96125
},
"tier": "slow",
"urgency": "low"
},
{
"blocks": [
1,
1
],
"expected": {
"eth": 0.00012415,
"usd": 0.320369
},
"maxFeePerGas": {
"gwei": 2.32
},
"tier": "fast",
"urgency": "high"
},
{
"blocks": [
1,
1
],
"expected": {
"eth": 0.00015665,
"usd": 0.404235
},
"maxFeePerGas": {
"gwei": 3.23
},
"tier": "urgent",
"urgency": "next_block"
}
],
"chain": "ethereum",
"chainId": 1,
"computedAt": "2026-10-29T12:00:00.500Z",
"decision": {
"action": "send_now",
"reason": "standard tier for normal urgency: latest block 46.3% full vs 50% target, base fee falling (-0.925% next block); expected $0.237 for 65000 gas, typically 1-2 blocks (~12-24 s)",
"requested_tier": "standard",
"tier": "standard"
},
"eth_usd": {
"available": true,
"price": 2580.5,
"source": "chainlink ETH/USD aggregator on Base (latestRoundData)"
},
"headline": "Ethereum: standard tier (normal urgency) = maxFee 1.82 gwei / tip 1 gwei, ~$0.237 for 65000 gas, ~1-2 blocks · send now",
"how_to_use": [
"Type-2 (EIP-1559) transaction: copy ready_to_sign.maxFeePerGas and maxPriorityFeePerGas (hex wei) into your transaction with your to / value / data / nonce; decision.action says send_now, downgrade (a cheaper tier fits max_usd) or wait (re-quote after recheck_in)."
],
"inputs": {
"calldata_bytes": null,
"gas_limit": 65000,
"max_usd": null,
"urgency": "normal"
},
"kit": "evm-fee-plan-1",
"l1_data_fee": {
"applicable": false,
"available": false
},
"market": {
"base_fee": {
"gwei": 0.41
},
"block": {
"ageSeconds": 5,
"gasUsedPct": 46.3,
"number": 23700000,
"timestamp": 1761739195
},
"next_block": {
"base_fee_direction": "falling",
"change_pct": -0.925,
"label": "balanced",
"next_base_fee_estimate": {
"gwei": 0.406208
}
},
"observedAt": "2026-10-29T12:00:00.000Z",
"priority": {
"basis": "node eth_maxPriorityFeePerGas",
"gwei": 1
}
},
"plan": {
"cost": {
"expected": {
"eth": 0.00009165,
"usd": 0.236503
},
"gas": 65000,
"max_authorized": {
"eth": 0.0001183,
"usd": 0.305273
}
},
"inclusion": {
"blocks": [
1,
2
],
"seconds": [
12,
24
]
},
"maxFeePerGas": {
"gwei": 1.82
},
"maxPriorityFeePerGas": {
"gwei": 1
},
"tier": "standard",
"urgency": "normal"
},
"ready_to_sign": {
"chainId": "0x1",
"gas": "0xfde8",
"maxFeePerGas": "0x6c7aff00",
"maxPriorityFeePerGas": "0x3b9aca00",
"tier": "standard",
"type": "0x2"
},
"sources": [
"publicnode ethereum rpc (via stream hub)",
"chainlink ETH/USD (Base feed)"
]
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"additionalProperties": false,
"properties": {
"gas_limit": {
"description": "gas units of YOUR transaction (default 21000 = ETH transfer; ~65000 ERC-20 transfer, ~46000 approve, ~180000 swap)",
"maximum": 30000000,
"minimum": 21000,
"type": "integer"
},
"max_usd": {
"description": "optional USD gas budget for this transaction: the plan downgrades to the best tier that fits, or says wait when even the slow tier is above it",
"maximum": 100000,
"minimum": 0.000001,
"type": "number"
},
"urgency": {
"description": "low = may wait a few blocks (slow tier), normal = next block or two (default, standard), high = busy blocks (fast), next_block = must land in the very next block (urgent)",
"enum": [
"low",
"normal",
"high",
"next_block"
],
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"alternatives": {
"type": "array"
},
"chain": {
"type": "string"
},
"chainId": {
"type": "integer"
},
"decision": {
"type": "object"
},
"eth_usd": {
"type": "object"
},
"headline": {
"type": "string"
},
"how_to_use": {
"type": "array"
},
"inputs": {
"type": "object"
},
"kit": {
"type": "string"
},
"l1_data_fee": {
"type": "object"
},
"market": {
"type": "object"
},
"plan": {
"type": "object"
},
"ready_to_sign": {
"type": "object"
},
"sources": {
"type": "array"
}
},
"required": [
"kit",
"chain",
"chainId",
"headline",
"decision",
"plan",
"ready_to_sign",
"market",
"eth_usd"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"builder-code": {
"info": {
"a": "bc_d5i1omim"
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"a": {
"description": "App builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"s": {
"description": "Service builder codes",
"items": {
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"maxItems": 11,
"type": "array"
},
"w": {
"description": "Wallet builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
}
},
"type": "object"
}
}
},
"lastUpdated": "2026-11-02T17:29:39.63Z",
"quality": {
"lastCalledAt": "2026-11-02T17:29:39.63Z"
},
"resource": "https://agents.avasis.ai/v1/eth/fee-plan",
"serviceName": "Avasis Agent Platform",
"tags": [
"ethereum",
"gas",
"fees",
"evm",
"eip-1559"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Ethereum gas fee plan for ONE transaction ($0.02): give gas_limit (+ urgency low/normal/high/next_block, optional max_usd budget) and get the EIP-1559 fields to sign (maxFeePerGas, maxPriorityFeePerGas, hex ready_to_sign), expected + max cost in ETH + USD, blocks to inclusion, the other tiers, and a send_now / downgrade / wait decision with its reason from the latest block's fill. Free live sample /v1/evm/fee-plan/sample. Upstream down 503, never charged."
}What the leaf hashes
{"body":"35d86850ca22c540a7f24d556d4c91d5a86cf40bbbb6e91985157e15e5a157cb","id":2253766,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793647856027541,"prev":null,"subject":"x402_bazaar:https://agents.avasis.ai/v1/eth/fee-plan","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
- 0xbc3daedf10d2777458e35e2612d8cb0641277c9ed874bf08b61d2a344a588f7a
- 0xbb7819116083d923e3e69f16f18d5169839ca742b113a59a2a19989cde3b5921
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- 0x0108a8dea8f77b47dd6605325d137a80f2d97be2c14b61648359ed106a2a2b83
- 0xc255b891127dd99b1ec30215f09275d89f146afa5b9e74c7f200bdcf87f14da4
- 0x66f14537caf3129ae61481d96481cbc4bbbca1279b0b84c1039f838e49fe0f49
- 0x0f3faa61bb1370d1edc69d612ed7ef10993d3397f37e07c443df6660a139bb25
- 0xfbbc2f3e96db46309f5ceea557d72a65d693789efd29018cfb1335926307b668
- 0x3d381206acac62e0236c02727f10fff4b32fa698c518e46025d828b16b4a6d57
- 0x33eaf83ff3680b986d64a2d09bfb5f0ccba4815fe302481f28b059c31b4f6efe
- 0x2b23e564b52c0999f8aa4d782b4e71a40cf2bd4b0c0540b346384d450203df55
- 0xe58525446254d2108eb36448d0c82e228b172272ca44d008f01d5ed4cf747eac
- 0x626fb5c7d656fa8c4ab162a898cfff0f195757f6cb547860059c20e431ef93c9
- 0xc1d961be09ff84253ce4ecf4b141b3c25631ce9eb1cc0a3197e5d83d03240ee4
- 0x834b6b9a36b42da183e2542785e8d2d7548ace455268a81922edbe6020cef644
- 0x2922573a524a0694086782ac45fa3083d3fc3f6a2a479b2105e1e2f06b2916f7
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- 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af