← The evidence ledger
Evidence row 407509
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://pool.linkrra.com/api/billing/x402/chat/completions
- Recorded
- Previous row
- #297324
- Body SHA-256
- 3bcd58451b908947963460f0443a11b6dd79776433ac95536509b51d743d792f
- Leaf
- 0x35a79a0662f59f3335bc7d05b1249e4ac3ec9021418eca58b530cedbedbe7cf2
What was observed
{
"endpoints": [
[
"x402",
"https://pool.linkrra.com/api/billing/x402/chat/completions"
]
],
"name": "Linkrra Synap: Open-Model LLMs",
"owner_address": "0xaa0a350f6080940c138a8a50c0fa8c8387782eb4",
"raw": {
"accepts": [
{
"amount": "1000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0xAA0a350f6080940c138A8A50C0Fa8c8387782eb4",
"scheme": "exact"
}
],
"description": "Linkrra Synap: OpenAI-compatible chat completions API (LLM inference) for chat, coding and agent workloads. Pay per call in USDC on Base via x402 - no account, no API key. Model \"auto\" picks the cheapest fit. From $0.001 per call, usage-priced per token above that (GET /v1/models). Streaming supported. Product site: https://synap.linkrra.com",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"max_tokens": 256,
"messages": [
{
"content": "Write a Python function that reverses a string",
"role": "user"
}
],
"model": "auto",
"stream": false
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"choices": [
{
"message": {
"content": "def reverse(s):\n return s[::-1]",
"role": "assistant"
}
}
],
"id": "chatcmpl-...",
"model": "qwen/qwen3-vl-30b-a3b-instruct",
"object": "chat.completion",
"payment": {
"network": "eip155:8453",
"paidUsd": 0.001,
"transaction": "0x..."
},
"usage": {
"completion_tokens": 12,
"prompt_tokens": 16,
"total_tokens": 28
}
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"max_tokens": {
"default": 4096,
"description": "Completion token cap. The price is quoted for the prompt plus this cap.",
"maximum": 4096,
"minimum": 1,
"type": "integer"
},
"messages": {
"description": "OpenAI-format chat history, oldest first: [{role, content}].",
"examples": [
[
{
"content": "Write a Python function that reverses a string",
"role": "user"
}
]
],
"items": {
"properties": {
"content": {
"description": "Text, or an array of OpenAI content parts."
},
"role": {
"enum": [
"system",
"user",
"assistant",
"tool"
],
"type": "string"
}
},
"required": [
"role",
"content"
],
"type": "object"
},
"minItems": 1,
"type": "array"
},
"model": {
"description": "\"auto\" = cheapest of our self-hosted models that fits, or name one.",
"enum": [
"auto",
"qwen/qwen3-vl-30b-a3b-instruct",
"qwen/qwen3-30b-a3b",
"qwen3-coder-30b",
"gpt-oss-20b",
"gemma-4-26b-a4b-it"
],
"type": "string"
},
"stream": {
"default": false,
"description": "true = stream OpenAI-format Server-Sent Events.",
"type": "boolean"
}
},
"required": [
"model",
"messages"
],
"type": "object"
},
"bodyType": {
"enum": [
"json"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"description": "200 chat.completion (SSE if stream=true). 402 payment required or insufficient (challenge in PAYMENT-REQUIRED). 202 settlement pending. 400 invalid body or payment header. 404 model not offered. 409 payment already used. 503 no node serving the model, nothing charged. 500/502 facilitator, chain or model-server error; if inference fails after settlement the amount stays credited to the paying wallet.",
"properties": {
"example": {
"properties": {
"choices": {
"description": "choices[0].message.content is the reply.",
"type": "array"
},
"model": {
"description": "The model that answered.",
"type": "string"
},
"payment": {
"description": "USDC paid + Base tx hash; any unused amount stays credited to the payer.",
"type": "object"
},
"usage": {
"description": "Tokens billed: prompt, completion, total.",
"type": "object"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type",
"example"
],
"type": "object"
}
},
"required": [
"input",
"output"
],
"type": "object"
}
},
"builder-code": {
"info": {
"a": "bc_66yn2s8l"
},
"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"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1792411337/bazaar-icons/b78bd1ea567f2008.png",
"lastUpdated": "2026-10-27T03:41:16.508Z",
"quality": {
"l30DaysTotalCalls": 87,
"l30DaysUniquePayers": 6,
"lastCalledAt": "2026-10-26T23:41:08.292Z"
},
"resource": "https://pool.linkrra.com/api/billing/x402/chat/completions",
"serviceName": "Linkrra Synap: Open-Model LLMs",
"tags": [
"inference",
"llm",
"chat-completion",
"openai-compatible",
"ai-compute"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Linkrra Synap: OpenAI-compatible chat completions API (LLM inference) for chat, coding and agent workloads. Pay per call in USDC on Base via x402 - no account, no API key. Model \"auto\" picks the cheapest fit. From $0.001 per call, usage-priced per token above that (GET /v1/models). Streaming supported. Product site: https://synap.linkrra.com"
}What the leaf hashes
{"body":"3bcd58451b908947963460f0443a11b6dd79776433ac95536509b51d743d792f","id":407509,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793080248995946,"prev":297324,"subject":"x402_bazaar:https://pool.linkrra.com/api/billing/x402/chat/completions","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (273461 rows).
- 0x35a79821d42b2a0597962b196277e937f52741da5edcbc209cc58936f2b2cc78
- 0xff939c207f5e480dc782b11c552bdb9c65a90fbd02046be94157d59684a43a62
- 0x4398fcd443813d1857ec3485d8a6b8f8751ca9c124bf700bf5d497c039a79a70
- 0x4a9eef7ca082658a4930a195f83d9f4a7ebfa393dab2730510401f2ca4168b07
- 0xcd5e417cde8b4c2ba452a83c6c16bbbaf8be13d3b856d2c554b16effe7a3b4b6
- 0xc7ae99f27b314aa0e029cbddbffe3529d7382f35b225cdc6ef6662543d607035
- 0xd68db8ae9be6ca8558a51ffc4b0938df285b36150e5ecbcfd5e4d729db1d2d2d
- 0x67adaadd924cfd4fc6995a0dec01e3420592a3a46776199c689573403a8b833c
- 0xf2586cb85218f9c76d746aa96aa096956fde01af527f20035d5dd8756305260f
- 0xecfcd53ac79b70d08a13f2d77817adc7520939d2bdbbb220a967aabc3c18ef72
- 0x7d16ca26502bd3cffc15f5f1d96c750b48f891e77865e69e164c7296932a66f7
- 0x0491d1aef43a95c6e235bd50f122c12c8c56196bb71b329f055061f0e9ee7115
- 0x5a83a2d5b2abb340c16172caf3ef83b831e168d2e94e4154a4ad72adcac5cad2
- 0x595de2dea3b8fa56dbd6142dd78ae79f3e7169c631e41a844b100613abb3e430
- 0x8360ee1105e4d9f9312067cbbfd47c69c5948665ae582b9684a580c8f4e199e1
- 0x52efa60e0c3d8525486d2310eb3b6b566c9677c64fd1f819edb072cf101bcbdb
- 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
- 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
- 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699
- Day root
- 0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795
- Chained
- 0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4
- Published
- On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4