← The evidence ledger
Evidence row 291256
Observed , by probe.mcp/1.
- Kind
- mcp.tools
- About
- endpoint e999266e-f734-44c7-8978-b71ddf855ec0
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 5a7550263c9031fa878b49b21cc004ea1ac48dae53932159254ef3721c402f75
- Leaf
- 0xd9f0e2e7807d188b785979d8d4c726262502d81fc5a68e3c6d46a41c2784018d
What was observed
{
"count": 12,
"tools": [
{
"description": "Cached x402 endpoint observations, operated by SpendPreflight. Returns a transparent score (or unknown), its components and seven-day unpaid probe history for an already publicly listed URL. Never fetches the caller's URL or pays the endpoint. Unlisted, unavailable or stale data is not charged. This is not a paid-delivery or compliance guarantee. Provide the exact resource URL; add method when the URL has multiple advertised methods. Use for endpoint history and price context before paying. Use check_payee for wallet/name screening or preflight_payment for an allow/hold/block decision. Price $0.005 per cached lookup (shared free trial first). An unknown score means missing evidence; repeated paid calls may incur another charge.",
"inputSchema": {
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"description": "Example arguments: {\"url\":\"https://api.spendpreflight.com/v1/check\",\"method\":\"GET\"}",
"properties": {
"method": {
"description": "Advertised method such as GET or POST; required if the URL is ambiguous",
"maxLength": 16,
"minLength": 3,
"type": "string"
},
"url": {
"description": "Exact public HTTP(S) URL already listed by Bazaar or x402scan",
"maxLength": 2048,
"minLength": 1,
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
},
"name": "check_endpoint"
},
{
"description": "Compatibility alias of listing_guard for existing clients. Prefer listing_guard for a new detailed metadata check; these are the same operation, not two independent checks. Bazaar Listing Guard: CDP technical validation plus a bounded heuristic metadata screen for agent-directed instructions, embedded URLs, tool calls, invisible Unicode, long fields and prices above 100x a fresh Scout category median. Returns riskScore, flagged spans and rewrite suggestions. Not Coinbase policy certification or guaranteed detection. Public HTTPS only; no target payment or request bodies stored. Price $0.05 USDC on Base; shared trial may apply.",
"inputSchema": {
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"description": "Example arguments: {\"url\":\"https://api.spendpreflight.com/v1/check\",\"method\":\"GET\"}",
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"POST"
],
"type": "string"
},
"url": {
"maxLength": 2048,
"type": "string"
}
},
"required": [
"url",
"method"
],
"type": "object"
},
"name": "check_listing"
},
{
"description": "Payee risk check. Screens a payee wallet address and name against the OFAC SDN sanctions list and checks the merchant domain's registration age and DNS. Returns risk low|medium|high|unknown with flags such as sanctioned_address, sanctioned_name_possible, new_domain. Call this before a USDC payment when you only have a payee name, wallet or domain. Provide at least one of domain, address, or name; inputs may be combined, and domain accepts a hostname or URL. For an x402 challenge or cart and an allow/hold/block spending-rule decision, use preflight_payment instead. Price $0.01 per call (free trial first).",
"inputSchema": {
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"description": "Example arguments: {\"name\":\"Example Shop LLC\"}",
"properties": {
"address": {
"description": "Payee wallet address (EVM 0x…, BTC, etc.)",
"type": "string"
},
"domain": {
"description": "Merchant domain or URL, e.g. shop.example.com",
"type": "string"
},
"name": {
"description": "Merchant or payee legal name",
"type": "string"
}
},
"type": "object"
},
"name": "check_payee"
},
{
"description": "Base contract safety signals from bounded public-chain reads and OFAC. Basic: deployed bytecode and SDN match. Deep adds standard owner(), paused(), totalSupply(), decimals() and ERC-1967 storage observations, exact ERC-1167 minimal-proxy target detection, a Sourcify runtime-verification claim matched to current bytecode, and direct-deployment age when independently supported by the creation receipt. Honeypot/sellability, liquidity locks, holder concentration and scam lists are NOT assessed. Missing data is unknown; never a safe-to-buy verdict. Informational, not financial advice. Basic $0.02; deep $0.05. Shared trial first.",
"inputSchema": {
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"description": "Example arguments: {\"address\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\"chain\":\"eip155:8453\",\"tier\":\"basic\"}",
"properties": {
"address": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"chain": {
"const": "eip155:8453",
"type": "string"
},
"tier": {
"default": "basic",
"enum": [
"basic",
"deep"
],
"type": "string"
}
},
"required": [
"address"
],
"type": "object"
},
"name": "check_token"
},
{
"description": "Nearest RV dump/water stations from FillPoint RV's dated September 17, 2026 ODbL snapshot. $0.01 for bounded straight-line proximity calculation, not live access, potable-water assurance or road routing. Snapshot age and unknown current conditions are explicit. Full underlying projection is free under ODbL.",
"inputSchema": {
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"description": "Example arguments: {\"latitude\":42.07,\"longitude\":-88.36,\"radius_km\":50,\"limit\":10,\"service\":\"dump\"}",
"properties": {
"latitude": {
"maximum": 90,
"minimum": -90,
"type": "number"
},
"limit": {
"default": 10,
"maximum": 50,
"minimum": 1,
"type": "integer"
},
"longitude": {
"maximum": 180,
"minimum": -180,
"type": "number"
},
"radius_km": {
"default": 50,
"maximum": 500,
"minimum": 0.1,
"type": "number"
},
"service": {
"default": "either",
"enum": [
"dump",
"water",
"either"
],
"type": "string"
}
},
"required": [
"latitude",
"longitude"
],
"type": "object"
},
"name": "find_rv_stations"
},
{
"description": "Free, read-only service reference. Use when you need prices, default spending rules, payment setup, trial allowance, or a ready-to-use example call. If you already have a payment challenge or cart, call preflight_payment directly; this reference call is optional. Takes no arguments and performs no payee screening or payment decision. Use check_payee for standalone payee risk; use preflight_payment for an x402 challenge or cart and an allow/hold/block decision.",
"inputSchema": {
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"description": "Example arguments: {}",
"properties": {},
"type": "object"
},
"name": "get_service_info"
},
{
"description": "Free x402 Lint by SpendPreflight. Checks a public HTTPS endpoint with an unpaid GET: v1/v2 challenge shape, payTo/asset/network syntax, price, Bazaar metadata and browser CORS headers. Returns a heuristic Listing Guard riskScore (0–100 or unknown), fixes and a public seven-day report link. Positive scores include optional paid Listing Guard and monitoring links; no paid call is made. Scores are not safety or Bazaar acceptance guarantees. No payment or credentials; GET cannot validate a POST-only endpoint or paid delivery. Do not submit private URLs. CI Action: https://github.com/spendpreflight/x402-lint-action; report badge: /v1/lint/reports/{id}/badge.svg reads only the existing seven-day snapshot, never runs a check.",
"inputSchema": {
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"description": "Example arguments: {\"url\":\"https://api.spendpreflight.com/v1/check?name=Acme\"}",
"properties": {
"url": {
"maxLength": 2048,
"minLength": 1,
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
},
"name": "lint_endpoint"
},
{
"description": "Bazaar Listing Guard: CDP technical validation plus a bounded heuristic metadata screen for agent-directed instructions, embedded URLs, tool calls, invisible Unicode, long fields and prices above 100x a fresh Scout category median. Returns riskScore, flagged spans and rewrite suggestions. Not Coinbase policy certification or guaranteed detection. Public HTTPS only; no target payment or request bodies stored. Price $0.05 USDC on Base; shared trial may apply.",
"inputSchema": {
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"description": "Example arguments: {\"url\":\"https://api.spendpreflight.com/v1/check\",\"method\":\"GET\"}",
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"POST"
],
"type": "string"
},
"url": {
"maxLength": 2048,
"type": "string"
}
},
"required": [
"url",
"method"
],
"type": "object"
},
"name": "listing_guard"
},
{
"description": "Verify a native Base USDC transfer by tx_hash (optional log_index), or exact pay_to + decimal amount + past start/end (max 90 days). Ambiguous matches fail without charge. Signed observation, OFAC flags, confirmations and printable HTML. Not invoice ownership or finality proof. Price $0.01 USDC on Base. No free trial.",
"inputSchema": {
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"description": "Example arguments: {\"tx_hash\":\"0x1111111111111111111111111111111111111111111111111111111111111111\"}",
"properties": {
"amount": {
"pattern": "^(?:0|[1-9][0-9]{0,70})(?:\\.[0-9]{1,6})?$",
"type": "string"
},
"end": {
"$ref": "#/properties/start"
},
"log_index": {
"maximum": 1000000,
"minimum": 0,
"type": "integer"
},
"pay_to": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"start": {
"format": "date-time",
"type": "string"
},
"tx_hash": {
"pattern": "^0x[0-9a-fA-F]{64}$",
"type": "string"
}
},
"type": "object"
},
"name": "payment_receipt"
},
{
"description": "Call this before any x402/USDC payment to evaluate the actual challenge or cart before signing. Spend preflight for AI agents. Send the x402 PaymentRequired body (v1 or v2) you received, or a cart, plus optional rules (per-payment max, hold threshold, daily cap, allowlists, new-domain days, endpoint category price multiple, liveness and payTo changes). Returns allow|hold|block with reasons, the cheapest acceptable payment option, and a receipt id. Read-only: never signs, settles, or holds funds. Use before every payment. It includes payee screening in its spending-rule decision. For standalone wallet, name, or domain screening without a payment, use check_payee instead. Each repeat call creates a new receipt and may consume another trial or paid call. Price $0.02 per call (free trial first).",
"inputSchema": {
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"description": "Example arguments: {\"cart\":{\"merchant_name\":\"Example Shop LLC\",\"total_usd\":0.01},\"rules\":{\"max_per_payment_usd\":1},\"spent_today_usd\":0}",
"properties": {
"cart": {
"additionalProperties": false,
"description": "Use instead of challenge for agent checkout / card payments",
"properties": {
"merchant_domain": {
"type": "string"
},
"merchant_name": {
"type": "string"
},
"pay_to": {
"type": "string"
},
"total_usd": {
"type": "number"
}
},
"type": "object"
},
"challenge": {
"additionalProperties": {},
"description": "The x402 PaymentRequired body (v1 or v2) your agent received with HTTP 402",
"type": "object"
},
"resource_method": {
"description": "Advertised method for an indexed URL with multiple methods",
"maxLength": 16,
"minLength": 3,
"type": "string"
},
"resource_url": {
"description": "URL that returned the 402, if not inside the challenge",
"type": "string"
},
"rules": {
"additionalProperties": false,
"description": "Spending rules; all optional. See get_service_info for defaults.",
"properties": {
"allowed_networks": {
"items": {
"maxLength": 128,
"minLength": 1,
"type": "string"
},
"maxItems": 100,
"type": "array"
},
"daily_cap_usd": {
"minimum": 0,
"type": "number"
},
"domain_allowlist": {
"items": {
"maxLength": 253,
"minLength": 1,
"type": "string"
},
"maxItems": 100,
"type": "array"
},
"domain_blocklist": {
"items": {
"maxLength": 253,
"minLength": 1,
"type": "string"
},
"maxItems": 100,
"type": "array"
},
"hold_above_usd": {
"minimum": 0,
"type": "number"
},
"hold_on_payto_change": {
"type": "boolean"
},
"max_per_payment_usd": {
"exclusiveMinimum": 0,
"type": "number"
},
"max_price_multiple": {
"anyOf": [
{
"exclusiveMinimum": 0,
"type": "number"
},
{
"type": "null"
}
]
},
"new_domain_days": {
"minimum": 0,
"type": "number"
},
"payto_allowlist": {
"items": {
"maxLength": 128,
"minLength": 1,
"type": "string"
},
"maxItems": 100,
"type": "array"
},
"payto_blocklist": {
"items": {
"maxLength": 128,
"minLength": 1,
"type": "string"
},
"maxItems": 100,
"type": "array"
},
"require_live": {
"type": "boolean"
},
"screen_sanctions": {
"type": "boolean"
},
"strict_allowlist": {
"type": "boolean"
},
"usdc_only": {
"type": "boolean"
}
},
"type": "object"
},
"spent_today_usd": {
"description": "What this agent already spent today, for the daily cap",
"type": "number"
}
},
"type": "object"
},
"name": "preflight_payment"
},
{
"description": "Off-grid PV energy-balance estimate based on Wattpath by Nomad Energy Club. Supply daily loads, peak sun hours, PV losses, and optional battery assumptions. No location/weather lookup, electrical design, surge or installation certification. $0.02 per calculation; no stored inputs.",
"inputSchema": {
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"description": "Example arguments: {\"loads\":[{\"watts\":100,\"hours_per_day\":5,\"quantity\":1,\"kind\":\"dc\"}],\"peak_sun_hours\":4,\"pv_loss_fraction\":0.2,\"panel_watts\":200,\"battery\":{\"voltage\":12,\"usable_fraction\":0.8,\"autonomy_days\":2}}",
"properties": {
"battery": {
"additionalProperties": false,
"properties": {
"autonomy_days": {
"exclusiveMinimum": 0,
"maximum": 30,
"type": "number"
},
"existing_capacity_ah": {
"maximum": 1000000,
"minimum": 0,
"type": "number"
},
"usable_fraction": {
"maximum": 1,
"minimum": 0.05,
"type": "number"
},
"voltage": {
"maximum": 1000,
"minimum": 1,
"type": "number"
}
},
"required": [
"voltage",
"usable_fraction",
"autonomy_days"
],
"type": "object"
},
"inverter_efficiency": {
"maximum": 1,
"minimum": 0.1,
"type": "number"
},
"loads": {
"items": {
"additionalProperties": false,
"properties": {
"hours_per_day": {
"maximum": 24,
"minimum": 0,
"type": "number"
},
"kind": {
"enum": [
"ac",
"dc"
],
"type": "string"
},
"quantity": {
"default": 1,
"maximum": 100,
"minimum": 1,
"type": "integer"
},
"watts": {
"maximum": 100000,
"minimum": 0,
"type": "number"
}
},
"required": [
"watts",
"hours_per_day",
"kind"
],
"type": "object"
},
"maxItems": 50,
"minItems": 1,
"type": "array"
},
"panel_watts": {
"maximum": 2000,
"minimum": 1,
"type": "number"
},
"peak_sun_hours": {
"exclusiveMinimum": 0,
"maximum": 24,
"type": "number"
},
"pv_loss_fraction": {
"maximum": 0.95,
"minimum": 0,
"type": "number"
}
},
"required": [
"loads",
"peak_sun_hours",
"pv_loss_fraction"
],
"type": "object"
},
"name": "size_solar"
},
{
"description": "Export native Base USDC wallet transfers as JSON or CSV for a past range up to 90 days, start inclusive/end exclusive. Exact decimal running balances, counterparties and OFAC flags. Up to 1000 transfers/128 RPC calls/25 seconds; oversized or unavailable historical data fails without charge. Informational, not tax advice. Price $0.05 USDC on Base. No free trial.",
"inputSchema": {
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"description": "Example arguments: {\"address\":\"0x1111111111111111111111111111111111111111\",\"start\":\"2026-10-01T00:00:00Z\",\"end\":\"2026-10-02T00:00:00Z\",\"format\":\"json\"}",
"properties": {
"address": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"end": {
"$ref": "#/properties/start"
},
"format": {
"default": "json",
"enum": [
"json",
"csv"
],
"type": "string"
},
"start": {
"format": "date-time",
"type": "string"
}
},
"required": [
"address",
"start",
"end"
],
"type": "object"
},
"name": "wallet_statement"
}
]
}What the leaf hashes
{"body":"5a7550263c9031fa878b49b21cc004ea1ac48dae53932159254ef3721c402f75","id":291256,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793047973892736,"prev":null,"subject":"e999266e-f734-44c7-8978-b71ddf855ec0","subject_kind":"endpoint"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0xd9f106036c585f73e2bb1612688137fbfc91070e6479c939d7889eed40a613c2
- 0x77c7ade2f34a2a20add7cefeb2bc68b77cda60b63b6837c3ddeac8a584d46ce9
- 0xf5001ef04d581aeb396b1d203c8f7eb36a98b0b73a07681083ff66967a9c24ad
- 0x1c1b735aabc625ba37eaad0ad7b6b98d93dac271924ac8c8a28feb7b6380269c
- 0x7a99d8ad6a9e138807538b629be98345aeffebc5e46bd575df7523b495be8fef
- 0xb2a3d4662c25642038a45ce9ccf9ec32da72863bcb6df7e02c1a6f6c7a4ed59a
- 0x12099b74d3268b95bb7bf40862e9116133568d5a99ccaaf0bfdd0998dc615cc3
- 0x3321509009548b1682e1b723c2fcef96c859133af036bee0ae2b57dcd308c478
- 0x68c971729b04d1634887b79cea976d18d27a982e87ff4592dd02843c6beafffe
- 0xddb1d558f250f3c7af2a9114478d2e8fd2c1ccf13c41a7367d80c929b4a5e0c6
- 0xc65997d4cbe46cfb99054bd5df6a660823432d48a8d7d21b0c1bed1df236af25
- 0x3704bc5ad033a79977899a5ead894cf50c0b8c8432c020959cefe2af561eb5ee
- 0xcd9e3af1fa905ec61b99ee9442716d7c7a439aecacd018ec229a24def1cabf6b
- 0x6b927d53caa5125cdba9255612d524976c691f8672796c3f0885ba2c5b3af1ad
- 0x6dc40f983a3840a0ad927a9ca17f4ff1e3b649a6c735e2a09b140db7c2caf13b
- 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
- 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae