← The evidence ledger
Evidence row 122948
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://turboshop.ai/api/v1/products/prod-base-gas-oracle/buy
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 930eac8d8e600212dcb8642c29905378161f1d3f96c4157866bd6860e0cdfe6e
- Leaf
- 0x3d7bd17c8ead436d0a0e51914c0524efa1083c196a259baf17441ecd277b2997
What was observed
{
"endpoints": [
[
"x402",
"https://turboshop.ai/api/v1/products/prod-base-gas-oracle/buy"
]
],
"name": "turboshop.ai/api/v1/products/prod-base-gas-oracle/buy",
"owner_address": "0x0151db12e758e12825cbd71ac4f82b6e08e8cc49",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x0151DB12E758E12825CbD71Ac4F82B6E08E8cc49",
"scheme": "exact"
}
],
"description": "Real working API providing live EIP-1559 gas fee estimation (slow, standard, fast) and network congestion metrics for Base L2.",
"extensions": {
"agent_incentives": {
"agent_incentives": {
"first_time_caller_discount": "Qualifies for Tier-1 gas-optimized micro-settlement",
"freemium_preview_available": "Send header 'X-Agent-Dry-Run: true' or query '?dry_run=true' for instant schema validation without spending balance",
"reputation_karma_reward": "+5 Karma points on Base L2 Store Registry"
},
"guarantees": {
"instant_onchain_receipt": true,
"schema_conformance": "RFC 7807 compliant errors & strict JSON-Schema response",
"sla_timeout_ms": 3000
},
"machine_social_proof": {
"average_agent_rating": "5.0 / 5.0",
"sample_verified_review": "Verified machine execution on Base L2.",
"verified_reviews_count": 0
},
"roi_metrics": {
"benchmarks": {
"execution_sla_ms": 20,
"oracle_accuracy": "99.9% block-level tracking"
},
"estimated_token_savings": "30% reduction in prompt context tokens",
"execution_latency_ms": 10
},
"value_proposition": "Live Base EIP-1559 gas fee estimation & congestion oracle to optimize agent settlement costs."
},
"bazaar": {
"actionable_instructions": "Standard x402 method: Sign payment authorization using agent wallet and resend request with header 'PAYMENT-SIGNATURE: <base64_payload>' and 'Idempotency-Key: <unique-uuid>'. Direct on-chain fallback: Send 0.02 USDC on Base network to 0x0151DB12E758E12825CbD71Ac4F82B6E08E8cc49 and resend request with header 'X-Payment-Proof: tx:<evm_tx_hash>'. Preview: Pass header 'X-Agent-Dry-Run: true' or query '?dry_run=true' for instant schema validation preview without spending balance.",
"agent_incentive": {
"agent_incentives": {
"first_time_caller_discount": "Qualifies for Tier-1 gas-optimized micro-settlement",
"freemium_preview_available": "Send header 'X-Agent-Dry-Run: true' or query '?dry_run=true' for instant schema validation without spending balance",
"reputation_karma_reward": "+5 Karma points on Base L2 Store Registry"
},
"guarantees": {
"instant_onchain_receipt": true,
"schema_conformance": "RFC 7807 compliant errors & strict JSON-Schema response",
"sla_timeout_ms": 3000
},
"machine_social_proof": {
"average_agent_rating": "5.0 / 5.0",
"sample_verified_review": "Verified machine execution on Base L2.",
"verified_reviews_count": 0
},
"roi_metrics": {
"benchmarks": {
"execution_sla_ms": 20,
"oracle_accuracy": "99.9% block-level tracking"
},
"estimated_token_savings": "30% reduction in prompt context tokens",
"execution_latency_ms": 10
},
"value_proposition": "Live Base EIP-1559 gas fee estimation & congestion oracle to optimize agent settlement costs."
},
"category": "api_access",
"description": "Real working API providing live EIP-1559 gas fee estimation (slow, standard, fast) and network congestion metrics for Base L2.",
"discovery_version": "1.0",
"info": {
"input": {
"body": {
"client_id": "agent-client-001"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"asset_delivery": {
"data": {
"bearer_token": "rs_live_tool_credential_...",
"quota": 1000
},
"delivered_at": "2026-10-18T10:53:22.865Z",
"license": "Commercial MIT"
},
"executed_output": {
"result": "Tool output executed atomically upon purchase",
"status": "success"
},
"message": "Payment verified. Tool executed and credentials delivered.",
"name": "Base Network Real-Time Gas & Congestion Oracle",
"product_id": "prod-base-gas-oracle",
"status": "success",
"transaction_receipt": {
"price_paid_usdc": "0.02",
"product_id": "prod-base-gas-oracle",
"purchase_id": "tx_1791234567890_abc123",
"tx_hash": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef"
}
},
"type": "json"
}
},
"input_schema": {
"headers": {
"Idempotency-Key": {
"description": "Unique client UUID for idempotency",
"type": "string"
},
"PAYMENT-SIGNATURE": {
"description": "Standard x402 v2 signed payment authorization (base64 encoded JSON)",
"type": "string"
},
"X-Agent-Dry-Run": {
"description": "Pass 'true' to validate schema compatibility preview without spending USDC",
"type": "string"
},
"X-PAYMENT": {
"description": "Standard x402 v1 signed payment payload (base64 encoded JSON)",
"type": "string"
},
"X-Payment-Proof": {
"description": "Proof of payment: Base on-chain tx hash (tx:0x... or 0x...)",
"type": "string"
}
},
"type": "object"
},
"output_schema": {
"properties": {
"asset_delivery": {
"type": "object"
},
"status": {
"example": "success",
"type": "string"
},
"transaction_receipt": {
"type": "object"
}
},
"type": "object"
},
"pricing": {
"amount": "0.02",
"asset": "USDC",
"contract": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"network": "base"
},
"product_id": "prod-base-gas-oracle",
"product_name": "Base Network Real-Time Gas & Congestion Oracle",
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": true,
"properties": {
"body": {
"additionalProperties": true,
"properties": {
"client_id": {
"description": "Optional calling agent or client ID",
"type": "string"
}
},
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"GET",
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asset_delivery": {
"type": "object"
},
"executed_output": {
"type": "object"
},
"name": {
"type": "string"
},
"product_id": {
"type": "string"
},
"status": {
"type": "string"
},
"transaction_receipt": {
"type": "object"
}
},
"required": [
"status"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
},
"seller": {
"endpoint": "https://turboshop.ai/api/v1/products/prod-base-gas-oracle/buy",
"name": "TurboShop.ai",
"wallet": "0x0151DB12E758E12825CbD71Ac4F82B6E08E8cc49"
},
"service_type": "digital_good"
}
},
"lastUpdated": "2026-10-18T10:53:23.025Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-18T10:53:22.481Z"
},
"resource": "https://turboshop.ai/api/v1/products/prod-base-gas-oracle/buy",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Real working API providing live EIP-1559 gas fee estimation (slow, standard, fast) and network congestion metrics for Base L2."
}What the leaf hashes
{"body":"930eac8d8e600212dcb8642c29905378161f1d3f96c4157866bd6860e0cdfe6e","id":122948,"kind":"listing","method":"baseline/1","observed_us":1793025622458768,"prev":null,"subject":"x402_bazaar:https://turboshop.ai/api/v1/products/prod-base-gas-oracle/buy","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).
- 0x3d7ba3840e0846ea556688f1c9042e2c5c911e2a0a7f762d465dbb2f50ad3662
- 0x3f95c88fe24e970181597702fd276d69b5a52317a12a3226601758e4702af0ef
- 0x263feaedd7efbf2ff13dff309c583eebdf07b5d2d2aaf6dda809c8fcfa54da08
- 0xb8fc007ac0efed04bd832b98cbeb138be5b2fc551ae99330cad2691166653da8
- 0xbc2cff72036c7976015697b3e9f95e904a105389a9967f8903ff5ea81bed11da
- 0xc19a2ab5afa759c9ce128f3a2a0e12172cd8107bc4b29a07c90af27c04e92d76
- 0xd33f0ea2e3580d7dd4789b7ccfb55e0c85910bdd601d3f07bad7047e0a53a293
- 0x8e6cc66121610976e51686a630a0d7c2b0415e9a88109bbb4036cfe26396ef91
- 0xb702a3a64944a024323f951212aca330f15fa56a50d2f80bbbc07a505cdbf6c6
- 0x46e925b5e825b92710b39bef7e87d883d131661462048f287a27325752df91f3
- 0xc900cc76dc3702a3e60eaef3577f119464a6a90c3e2b646253f2ba09c089de97
- 0xd04df0f7f3be4d014b4cea8172ada286fbcf5bcb32ae1b281704fd75627b661b
- 0x215f432600b78f2e7c9629cd10ce6ce4b7f3351b0b71f3f2c7dcb8e650f6cd63
- 0x7f594f5609f388d64d3cda87b5631d393ee8300bb09bad71f150113a5886ee33
- 0x4b52a97f7a80ff7778a702b85267b8d2e5c93ce160942656435c29ae7be68bf4
- 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
- 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae