← The evidence ledger
Evidence row 63921
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://agentshelf.syntexa.ch/v1/base-estimate-gas
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 5228f9bedf6b14b012aff4822fd7e623450ceaed646d9b77dd965046f2c294c7
- Leaf
- 0x36d00ae7b1a3f124cd8838a00052301f4f5b044d0f7ec3f6034df7d707dc4c56
What was observed
{
"endpoints": [
[
"x402",
"https://agentshelf.syntexa.ch/v1/base-estimate-gas"
]
],
"name": "agentshelf.syntexa.ch/v1/base-estimate-gas",
"owner_address": "0x1d61faa032d3f40d9c470d2bf3a3f53de0e55a38",
"raw": {
"accepts": [
{
"amount": "3000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 60,
"network": "eip155:8453",
"payTo": "0x1D61FAA032d3f40D9C470D2bf3A3f53De0E55a38",
"scheme": "exact"
}
],
"description": "Call when an agent needs eth_estimateGas, the current gas price, and the estimated cost in ETH and USD for a Base transaction. Send to and optional from, data, and value. Read-only. No spend. Send JSON {\"to\":\"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045\"}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/base-estimate-gas first.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"to": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"billed": true,
"data": null,
"estimated_cost_eth": "0.000021",
"estimated_cost_usd": "0.042",
"estimated_cost_wei": "21000000000000",
"eth_usd": "2000",
"from": null,
"gas": "21000",
"gas_price_wei": "1000000000",
"network": "eip155:8453",
"ok": true,
"receipt_id": "rcpt_01EXAMPLE000000000000000",
"to": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"value": null,
"warnings": []
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"examples": [
{
"to": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
}
],
"properties": {
"data": {
"description": "Optional calldata, even-length 0x hex, at most 2048 characters. Example: 0x. Required when to is omitted.",
"maxLength": 2048,
"type": "string"
},
"from": {
"description": "Optional sender on Base mainnet. Example: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045. EIP-55 or all one case. Read-only.",
"type": "string"
},
"to": {
"description": "Optional recipient or contract on Base mainnet. Example: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045. Required when data is omitted.",
"examples": [
"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
],
"type": "string"
},
"value": {
"description": "Optional value in wei, as a decimal integer or 0x hex quantity. Example: 0. Omit it for zero.",
"type": "string"
}
},
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"examples": [
{
"billed": true,
"data": null,
"estimated_cost_eth": "0.000021",
"estimated_cost_usd": "0.042",
"estimated_cost_wei": "21000000000000",
"eth_usd": "2000",
"from": null,
"gas": "21000",
"gas_price_wei": "1000000000",
"network": "eip155:8453",
"ok": true,
"receipt_id": "rcpt_01EXAMPLE000000000000000",
"to": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"value": null,
"warnings": []
}
],
"properties": {
"billed": {
"examples": [
true
],
"type": "boolean"
},
"data": {
"examples": [
null
],
"type": [
"string",
"null"
]
},
"estimated_cost_eth": {
"examples": [
"0.000021"
],
"type": "string"
},
"estimated_cost_usd": {
"examples": [
"0.042"
],
"type": [
"string",
"null"
]
},
"estimated_cost_wei": {
"examples": [
"21000000000000"
],
"type": "string"
},
"eth_usd": {
"examples": [
"2000"
],
"type": [
"string",
"null"
]
},
"from": {
"examples": [
null
],
"type": [
"string",
"null"
]
},
"gas": {
"examples": [
"21000"
],
"type": "string"
},
"gas_price_wei": {
"examples": [
"1000000000"
],
"type": "string"
},
"network": {
"const": "eip155:8453",
"examples": [
"eip155:8453"
],
"type": "string"
},
"ok": {
"const": true,
"examples": [
true
],
"type": "boolean"
},
"receipt_id": {
"examples": [
"rcpt_01EXAMPLE000000000000000"
],
"type": "string"
},
"to": {
"examples": [
"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
],
"type": [
"string",
"null"
]
},
"value": {
"examples": [
null
],
"type": [
"string",
"null"
]
},
"warnings": {
"default": [],
"examples": [
[]
],
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"ok",
"receipt_id",
"billed",
"network",
"from",
"to",
"data",
"value",
"gas",
"gas_price_wei",
"estimated_cost_wei",
"estimated_cost_eth",
"estimated_cost_usd",
"eth_usd"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-19T07:31:59.682Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-19T07:31:59.288Z"
},
"resource": "https://agentshelf.syntexa.ch/v1/base-estimate-gas",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Call when an agent needs eth_estimateGas, the current gas price, and the estimated cost in ETH and USD for a Base transaction. Send to and optional from, data, and value. Read-only. No spend. Send JSON {\"to\":\"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045\"}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/base-estimate-gas first."
}What the leaf hashes
{"body":"5228f9bedf6b14b012aff4822fd7e623450ceaed646d9b77dd965046f2c294c7","id":63921,"kind":"listing","method":"baseline/1","observed_us":1793025455802713,"prev":null,"subject":"x402_bazaar:https://agentshelf.syntexa.ch/v1/base-estimate-gas","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0x36cffbed6445037e32617cf5fa01b48d7b40e4ad6c4fd27d394302a8489bd3be
- 0x8552ba74d78fcf57711edd482a35762baa992062f50f40c3ae1b8009322a81fd
- 0xea90f4231426d389cbcdbc61c61181fae1dbd9fa0d83b88b2877f28dcdf2d3b4
- 0xd859b942dd255d29737a8a9d46d4cf14f088a1dc6ed9c3c9f0b85929e2a8cbe7
- 0xd4749213370e488218ca7c7789ba3bbbfa7c761b8d49dbf8fdec895bb3b2581b
- 0x2298a9edd5b6183e138d0e4808fc1b37aeb897cbc9a074da6893bbec2dd55b17
- 0x6b5da42589065d0722c854959e32824237133f6198fafaa6589904da3350fa2a
- 0x8b43aaf6a6f90455c163e7c772f4a55e917f5f5dfafb02481e027dde607d5815
- 0x033a42b89f3e3407122c0d602f35a71e0aa466f24cb3329c48bbd21e937c0e2d
- 0x7f646cc5e17121efe4381acea1d941112b5aa8de81dc471998b936a49db0f9d4
- 0x6cbefa9ec57ab9d64a7d01c677008d2c83081eace93b8302d64510745c5d3e36
- 0x992ab7416b80cd368936c788f743fd3ea4576a49e22c75ab0262abf692f8ed6c
- 0xdfc7a920beab71e6882e75c57bf136a5354c4ea989a35108a69046bc62059090
- 0x4338355a835617a26aa0bfcc971e84eb030d84e2aa840e3c8af958921dd080c7
- 0x610738e0c43687aded83c613c73de8b5226c73c375858a167436461c522ea213
- 0x06d71bfa7d8b41d62c8836efc2c601e1cc3772d9453596b2ae4950887f3310ca
- 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae