← The evidence ledger
Evidence row 16518
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://ask.singitai.app/v1/chat/claude-sonnet-5.5
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 7322ebe269f787940df970099115fe1cf8c5349fed4472fba2162c83dd8eadac
- Leaf
- 0xd958e8af36908a1dc294beb34a2cdb3e8ec0164ad24b15624421ba28b8d32dfd
What was observed
{
"endpoints": [
[
"x402",
"https://ask.singitai.app/v1/chat/claude-sonnet-5.5"
]
],
"name": "SingIt Ask",
"owner_address": "0xc23d1dc0f5fce1abffb051e06cb93f0329968b4e",
"raw": {
"accepts": [
{
"amount": "2580",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"billing": {
"markupBps": 3000,
"maxChargeAtomic": "2580",
"mode": "exact_ceiling",
"settlementFeeAtomic": "1000",
"version": 1
},
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0xC23d1Dc0f5fCe1abfFB051e06cB93f0329968B4e",
"scheme": "exact"
},
{
"amount": "4474",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"billing": {
"markupBps": 3000,
"maxChargeAtomic": "4474",
"mode": "actual_usage",
"settlementFeeAtomic": "2000",
"version": 1
},
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"paymentFlow": "escrow",
"receiverAuthorizer": "9dpHxn3XFZMZv59vE5MKxhfwGUCCgkcCUzYZLpdEm7ox",
"tokenProgram": "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA",
"withdrawDelay": 300
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "4an2sqamWWhny9mjLsMtGXCDXakeNtg6vSLq4QvhdmQu",
"scheme": "upto"
},
{
"amount": "3474",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "permit2",
"billing": {
"markupBps": 3000,
"maxChargeAtomic": "3474",
"mode": "actual_usage",
"settlementFeeAtomic": "1000",
"version": 1
},
"facilitatorAddress": "0x67B9CE703d9ce658d7C4ac3c289cEa112fE662Af",
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0xC23d1Dc0f5fCe1abfFB051e06cB93f0329968B4e",
"scheme": "upto"
},
{
"amount": "3580",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"billing": {
"markupBps": 3000,
"maxChargeAtomic": "3580",
"mode": "exact_ceiling",
"settlementFeeAtomic": "2000",
"version": 1
},
"feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "4an2sqamWWhny9mjLsMtGXCDXakeNtg6vSLq4QvhdmQu",
"scheme": "exact"
}
],
"description": "SingIt Ask: Claude Sonnet 5.5 (Anthropic) chat completions with no API key or account, OpenAI-compatible. Anthropic's mid-sized Claude model: everyday coding, writing and analysis at a lower cost than Opus. Call it when an agent needs Claude Sonnet 5.5 specifically.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"max_tokens": 400,
"messages": [
{
"content": "Where is good coffee near the Colosseum? (via Claude Sonnet 5.5)",
"role": "user"
}
],
"model": "claude-sonnet-5.5"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"billing": {
"currency": "USDC",
"markupAtomic": "2",
"markupBps": 3000,
"maxChargeAtomic": "3000",
"mode": "actual_usage",
"providerCostAtomic": "6",
"settlementFeeAtomic": "1000",
"totalAtomic": "1008",
"version": 1
},
"choices": [
{
"finish_reason": "stop",
"index": 0,
"message": {
"content": "Around the Colosseum, try Caffè Propaganda on Via Claudia or Bar Martini for an espresso with a view.",
"role": "assistant"
}
}
],
"created": 1791932400,
"id": "singit-ask-1791932400000",
"model": "singit-ask",
"object": "chat.completion",
"usage": {
"buyer_cost_micro": 6,
"completion_tokens": 31,
"prompt_tokens": 14,
"total_tokens": 45
}
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"max_tokens": {
"default": 800,
"description": "The longest answer, in tokens. The payment ceiling grows with it; the charge follows what was used.",
"maximum": 1200,
"minimum": 1,
"type": "integer"
},
"messages": {
"description": "The conversation, oldest first.",
"items": {
"properties": {
"content": {
"description": "Plain text; all messages together under 24000 characters.",
"type": "string"
},
"role": {
"enum": [
"system",
"user",
"assistant"
],
"type": "string"
}
},
"required": [
"role",
"content"
],
"type": "object"
},
"maxItems": 40,
"minItems": 1,
"type": "array"
},
"model": {
"description": "Any model id from GET /v1/models; the ceiling follows its price. Omit for the default model.",
"examples": [
"deepseek-v4.1-flash",
"claude-opus-5.5",
"gpt-5.5",
"gemini-3.1-pro"
],
"type": "string"
},
"stream": {
"description": "Streaming is not offered.",
"enum": [
false
],
"type": "boolean"
}
},
"required": [
"messages"
]
},
"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": {
"properties": {
"billing": {
"description": "What was charged, in USDC micro-units",
"properties": {
"currency": {
"const": "USDC",
"type": "string"
},
"markupAtomic": {
"type": "string"
},
"providerCostAtomic": {
"type": "string"
},
"totalAtomic": {
"description": "The amount settled",
"type": "string"
}
},
"type": "object"
},
"choices": {
"items": {
"properties": {
"finish_reason": {
"description": "stop, or length when max_tokens ended the answer",
"type": "string"
},
"index": {
"type": "integer"
},
"message": {
"properties": {
"content": {
"type": "string"
},
"role": {
"type": "string"
}
},
"type": "object"
}
},
"type": "object"
},
"type": "array"
},
"created": {
"description": "Unix seconds",
"type": "integer"
},
"id": {
"type": "string"
},
"model": {
"type": "string"
},
"object": {
"const": "chat.completion",
"type": "string"
},
"usage": {
"description": "Token counts and the model's own cost in micro-USD (buyer_cost_micro)",
"type": "object"
}
},
"required": [
"choices",
"billing"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"eip2612GasSponsoring": {
"info": {
"description": "The facilitator accepts EIP-2612 gasless Permit to `Permit2` canonical contract.",
"version": "1"
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"amount": {
"description": "The amount to approve (uint256). Typically MaxUint.",
"pattern": "^[0-9]+$",
"type": "string"
},
"asset": {
"description": "The address of the ERC-20 token contract.",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"deadline": {
"description": "The timestamp at which the signature expires.",
"pattern": "^[0-9]+$",
"type": "string"
},
"from": {
"description": "The address of the sender.",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"nonce": {
"description": "The current nonce of the sender.",
"pattern": "^[0-9]+$",
"type": "string"
},
"signature": {
"description": "The 65-byte concatenated signature (r, s, v) as a hex string.",
"pattern": "^0x[a-fA-F0-9]+$",
"type": "string"
},
"spender": {
"description": "The address of the spender (Canonical Permit2).",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"version": {
"description": "Schema version identifier.",
"pattern": "^[0-9]+(\\.[0-9]+)*$",
"type": "string"
}
},
"required": [
"from",
"asset",
"spender",
"amount",
"nonce",
"deadline",
"signature",
"version"
],
"type": "object"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1792921332/bazaar-icons/a240c598b3f928d1.png",
"lastUpdated": "2026-10-26T13:04:08.052Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-25T09:42:47.401Z"
},
"resource": "https://ask.singitai.app/v1/chat/claude-sonnet-5.5",
"serviceName": "SingIt Ask",
"tags": [
"llm",
"chat",
"openai-compatible",
"inference",
"pay-per-use"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "SingIt Ask: Claude Sonnet 5.5 (Anthropic) chat completions with no API key or account, OpenAI-compatible. Anthropic's mid-sized Claude model: everyday coding, writing and analysis at a lower cost than Opus. Call it when an agent needs Claude Sonnet 5.5 specifically."
}What the leaf hashes
{"body":"7322ebe269f787940df970099115fe1cf8c5349fed4472fba2162c83dd8eadac","id":16518,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793025323136729,"prev":null,"subject":"x402_bazaar:https://ask.singitai.app/v1/chat/claude-sonnet-5.5","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).
- 0xd9590f48c9b6619ee08f8a159f0c8e7815ed645f84ff8781bb37803d99d265dc
- 0x90b4323a900a300f2584d9520a7f0d0a96173e1387b80f2b9eec8f31b9907135
- 0xaec56f69eb01eb50ba17651e3d6b1d64753052ee55caf3ac5cfeb55bb4acace9
- 0x4820d811c101a5c915473e400d0107070da966215241bdab7f87f337a3d7ca59
- 0x9913540a8ac8f68f4cf697a1ac187fc698183ca4b9b945f81808c156bd8b51f8
- 0x49fae442fb4fcbfda1132df30064a2d988cd3dbcb646e3dd22f9a8b33811faa4
- 0x998c2b0c242a010f123c297ca15da6360500e0df4f904cfd98a1f804eb4a0683
- 0xbe92d261a2efc2626bf8a3ca76f2f0494bc5496479f9cd095e7409321bae2cf1
- 0xd650aae11fc4ec71a6d15a833a46afb8373c9dbda697aacbf624b13652ab472b
- 0xbef0db8aab9733efc417d7a27c94356a006b86ef076eb4c35a8d217ef10b433b
- 0xd96796540b8f5b592d8f03fc775e7a26bd00af394ce468ff886a43215a522475
- 0x07e91966e8a0c43a0725bd3d523259064a93333c2900e6171b69ffbfd9f423f1
- 0xcd9e3af1fa905ec61b99ee9442716d7c7a439aecacd018ec229a24def1cabf6b
- 0x6b927d53caa5125cdba9255612d524976c691f8672796c3f0885ba2c5b3af1ad
- 0x6dc40f983a3840a0ad927a9ca17f4ff1e3b649a6c735e2a09b140db7c2caf13b
- 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
- 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae