← The evidence ledger
Evidence row 1507936
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://agents.avasis.ai/v1/evm/gas-ops
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- d22c2ffad8008ada3f579c2965ef8fdc2b2e774051b3cc0f2cdbb2a11a23f2b8
- Leaf
- 0xb48865c18bfcd709886c263d3ede80773141e654ded37778408da68da7f38d9f
What was observed
{
"endpoints": [
[
"x402",
"https://agents.avasis.ai/v1/evm/gas-ops"
]
],
"name": "Avasis Agent Platform",
"owner_address": "0x6264191d6dd5427435b5e829077842e130ef1fc8",
"raw": {
"accepts": [
{
"amount": "50000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0x6264191D6dD5427435B5E829077842e130Ef1fc8",
"scheme": "exact"
}
],
"description": "Ethereum gas + Base gas in one call (evm gas ops, $0.05) for agents that send transactions. Per chain: base fee, priority fee, four EIP-1559 fee tiers (slow/standard/fast/urgent: maxFeePerGas + maxPriorityFeePerGas), next-block base-fee estimate + congestion, ETH + USD cost of a transfer / ERC-20 transfer / approve / swap and of your gas_limit (Chainlink ETH/USD), Base-vs-Ethereum comparison, a pick with its reason. Free live sample /v1/evm/gas-ops/sample. Upstream down 503, never charged.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"gas_limit": 21000
},
"type": "http"
},
"output": {
"example": {
"also_try": [
{
"price_usd": "0.05",
"url": "https://agents.avasis.ai/v1/meter/pack-trial",
"what": "Prepaid trial pack ($0.06 of credit): metered calls instead of per-call x402: these tips at $0.0002 per call instead of $0.002, the EVM gas-ops kit at $0.005; unchanged long-poll answers are free; SSE stream at /v1/stream/tips"
},
{
"price_usd": "1",
"url": "https://agents.avasis.ai/v1/meter/pack-1",
"what": "Prepaid $1 pack ($1.1 of credit, 30-day expiry from the last top-up): 220 metered gas-ops calls at $0.005 or 5,500 single tips; failed calls never debited"
}
],
"base": {
"ageMs": 380,
"available": true,
"block": {
"ageSeconds": 1,
"gasUsedPct": 14.2,
"number": 37400000,
"timestamp": 1761739199
},
"chain": "base",
"chainId": 8453,
"costs": {
"note": "(+ erc20_transfer, erc20_approve, dex_swap, max_authorized, wei in the paid body)",
"ops": [
{
"expected": {
"eth": 6.51e-8,
"usd": 0.000167991
},
"gas": 21000,
"op": "eth_transfer"
}
],
"per_gas_now": {
"gwei": 0.0031
},
"your_tx": {
"expected": {
"eth": 6.51e-8,
"usd": 0.000167991
},
"gas": 21000
}
},
"gwei": {
"baseFee": 0.0021,
"gasPrice": 0.0031,
"maxPriorityFee": 0.001,
"suggestedMaxFee": 0.0052
},
"next_block": {
"base_fee_direction": "falling",
"change_pct": -0.0592,
"eip1559": {
"denominator": 250,
"elasticity": 6,
"max_change_pct": 0.4
},
"label": "balanced",
"next_base_fee_estimate": {
"gwei": 0.002099
},
"vs_target": 0.852
},
"observedAt": "2026-10-29T12:00:00.000Z",
"pick": {
"tier": "standard"
},
"priority": {
"basis": "node eth_maxPriorityFeePerGas",
"gwei": 0.001
},
"seq": 2411,
"stale": false,
"tiers": [
{
"maxFeePerGas": {
"gwei": 0.002863
},
"maxPriorityFeePerGas": {
"gwei": 0.0005
},
"tier": "slow"
},
{
"maxFeePerGas": {
"gwei": 0.0052
},
"maxPriorityFeePerGas": {
"gwei": 0.001
},
"tier": "standard"
},
{
"maxFeePerGas": {
"gwei": 0.0057
},
"maxPriorityFeePerGas": {
"gwei": 0.0015
},
"tier": "fast"
},
{
"maxFeePerGas": {
"gwei": 0.0083
},
"maxPriorityFeePerGas": {
"gwei": 0.002
},
"tier": "urgent"
}
]
},
"compare": {
"cheaper": "base",
"ethereum_over_base": 454.8,
"gas_limit": 21000
},
"computedAt": "2026-10-29T12:00:00.500Z",
"eth_usd": {
"available": true,
"price": 2580.5,
"source": "chainlink ETH/USD aggregator on Base (latestRoundData)"
},
"ethereum": {
"ageMs": 420,
"available": true,
"block": {
"ageSeconds": 5,
"gasUsedPct": 46.3,
"number": 23700000,
"timestamp": 1761739195
},
"chain": "ethereum",
"chainId": 1,
"costs": {
"note": "(+ erc20_transfer, erc20_approve, dex_swap, max_authorized, wei in the paid body)",
"ops": [
{
"expected": {
"eth": 0.00002961,
"usd": 0.0764086
},
"gas": 21000,
"op": "eth_transfer"
}
],
"per_gas_now": {
"gwei": 1.41
},
"your_tx": {
"expected": {
"eth": 0.00002961,
"usd": 0.0764086
},
"gas": 21000
}
},
"gwei": {
"baseFee": 0.41,
"gasPrice": 1.41,
"maxPriorityFee": 1,
"suggestedMaxFee": 1.82
},
"next_block": {
"base_fee_direction": "falling",
"change_pct": -0.925,
"eip1559": {
"denominator": 8,
"elasticity": 2,
"max_change_pct": 12.5
},
"label": "balanced",
"next_base_fee_estimate": {
"gwei": 0.406208
},
"vs_target": 0.926
},
"observedAt": "2026-10-29T12:00:00.000Z",
"pick": {
"tier": "standard"
},
"priority": {
"basis": "node eth_maxPriorityFeePerGas",
"gwei": 1
},
"seq": 812,
"stale": false,
"tiers": [
{
"maxFeePerGas": {
"gwei": 0.96125
},
"maxPriorityFeePerGas": {
"gwei": 0.5
},
"tier": "slow"
},
{
"maxFeePerGas": {
"gwei": 1.82
},
"maxPriorityFeePerGas": {
"gwei": 1
},
"tier": "standard"
},
{
"maxFeePerGas": {
"gwei": 2.32
},
"maxPriorityFeePerGas": {
"gwei": 1.5
},
"tier": "fast"
},
{
"maxFeePerGas": {
"gwei": 3.23
},
"maxPriorityFeePerGas": {
"gwei": 2
},
"tier": "urgent"
}
]
},
"gas_limit": 21000,
"headline": "Ethereum base fee 0.41 gwei, balanced (falling), transfer ~$0.076 · Base 0.0021 gwei, transfer ~$0.00017 · ETH $2580.5 · Base 455x cheaper for 21000 gas right now",
"how_to_use": [
"Type-2 (EIP-1559) transaction: set maxFeePerGas and maxPriorityFeePerGas from the tier you choose (tiers[]); pick.tier is our deterministic suggestion with its reason."
],
"kit": "evm-gas-ops-1",
"solana": {
"priority_fee": {
"available": true,
"suggested": {
"high": 50000,
"low": 1000,
"medium": 10000,
"veryHigh": 200000
}
},
"slot": {
"available": true,
"slotProcessed": 462900001
},
"sol_usd": {
"available": true,
"price": 100.08
}
},
"sources": [
"publicnode ethereum rpc (via stream hub)",
"publicnode base rpc (via stream hub)",
"chainlink ETH/USD (Base feed)",
"publicnode solana rpc (via stream hub)"
]
},
"type": "json"
}
},
"schema": {
"$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, ~180000 swap): priced per tier in ETH and USD under costs.your_tx",
"maximum": 30000000,
"minimum": 21000,
"type": "integer"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"base": {
"type": "object"
},
"compare": {
"type": "object"
},
"eth_usd": {
"type": "object"
},
"ethereum": {
"type": "object"
},
"gas_limit": {
"type": "integer"
},
"headline": {
"type": "string"
},
"how_to_use": {
"type": "array"
},
"kit": {
"type": "string"
},
"solana": {
"type": "object"
},
"sources": {
"type": "array"
}
},
"required": [
"kit",
"headline",
"ethereum",
"base",
"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": "2026-10-31T12:09:22.034Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-31T12:09:21.943Z"
},
"resource": "https://agents.avasis.ai/v1/evm/gas-ops",
"serviceName": "Avasis Agent Platform",
"tags": [
"ethereum",
"base",
"gas",
"evm",
"fees"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Ethereum gas + Base gas in one call (evm gas ops, $0.05) for agents that send transactions. Per chain: base fee, priority fee, four EIP-1559 fee tiers (slow/standard/fast/urgent: maxFeePerGas + maxPriorityFeePerGas), next-block base-fee estimate + congestion, ETH + USD cost of a transfer / ERC-20 transfer / approve / swap and of your gas_limit (Chainlink ETH/USD), Base-vs-Ethereum comparison, a pick with its reason. Free live sample /v1/evm/gas-ops/sample. Upstream down 503, never charged."
}What the leaf hashes
{"body":"d22c2ffad8008ada3f579c2965ef8fdc2b2e774051b3cc0f2cdbb2a11a23f2b8","id":1507936,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793472705860426,"prev":null,"subject":"x402_bazaar:https://agents.avasis.ai/v1/evm/gas-ops","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (246033 rows).
- 0xb48895fc539c75356abbaee37d3f6463b2707fb936120d5c1c15325fa2a78ab1
- 0xc5e97c6dda3af451c4ee08d64bc9d90e38bc497db24b5f2baff33efe15394933
- 0xb4eaa592313c794d76065df3f2816f3c0570f10a5920e807037b73caae79a662
- 0x4f58ea2a512a81f0d2bf07128374d17b2c07a3cff10fa48b65787b095e103e55
- 0x4543179269933a0575213a92531b1bb1d7717e123c721fade6f5fc8e2709aa76
- 0x2929e15de7a1c0f21ba19d11610255cb86470b749fceaeef8f05f4ad49ba90cd
- 0x6f3cb691e33aeef25d322657c393efcdb118fe1cc69fa76d83e828ae8208c41e
- 0x9b3d544f8bae0de318ff4e9147e2f9141a132ec4c48ec8c45cb8908649d346bb
- 0x00da24c6612b2eb5e1e90985ab8cacd793b1228ae443ee01d07a71874ef3e52c
- 0x8f22d8a397e406f1acccf7b65ecf0ee9a12cbf519084a0310511995038815250
- 0xd3116a59a4ef04449af3e3e0d1e00acd7f9b4f0bd37dc62968e842a3b9b62e35
- 0x5ae0a7b65cc56319c356f6c30697c26127f3d1e7e67bb05a5e0fbc4d103968fd
- 0xc3ddb373f637398d9ec8fb5c1463a1261a97d1401cfa2b7e180df020e4d48003
- 0x8185eeafe9adefad89b2d62fb2c2a6beb3fde0409e51deb7d5c1a3c4cb40d65a
- 0x57afe240b626bf60f6af8c76404811e95ea5519f217fac382bd159177a8ec870
- 0x2e1cd25ce4079da9bfa6219d7ffec992149add4cd7d5c5b2cfee9908c1c8a5dd
- 0x50003b3c3045b653f8be4232e95e80582cf5c54c14c509ba0a9a197b9e5005cb
- 0x0504a25438f3c7932125463198ca74c5064f23f71a5c92763b3fc96a98cc8b57
- Day root
- 0x24463725d1c0d9894bd6123691d532547aaa79f0762c0e45aa6a68acf1fd71ab
- Chained
- 0x7d4824ff313dee7252a46f9d5c37b452851deb6c9f24a40c2f74ee0e53c82980
- Published
- On Arc Testnet, block 70093156: 0xedb7b832f4ebf6781b5ecd2ed241c435b862f4d3761541fa31adc1831b8c44a0