← The evidence ledger
Evidence row 452355
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
- #425311
- Body SHA-256
- b25f09c96cd125e7de9575b76655d63367a3223cd8a08e94476953b0d30ad7cc
- Leaf
- 0x5e6e0ae0e34e4f0ca264a0092c04dab1c9dbc1abfe177e9d3118599dd72f9789
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": "2026-10-27T07:41:24.958Z",
"quality": {
"l30DaysTotalCalls": 88,
"l30DaysUniquePayers": 6,
"lastCalledAt": "2026-10-27T03:41:16.114Z"
},
"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":"b25f09c96cd125e7de9575b76655d63367a3223cd8a08e94476953b0d30ad7cc","id":452355,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793100520646933,"prev":425311,"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).
- 0x5e6e1524fcd3edd4beee642932de1b0fe75cd0891916f19565fcebbc829dfb75
- 0x2c06a6026b9b347a944380c3ae4ce08ef73ffaf22021a4669bf2463c2a228a68
- 0x92cc94df7f2208b72dd77d639c93fbaba45c441220265a804b901053d06a1d4a
- 0xeaa3b43601a6cd2eafceea4e6f3556d51459072e8d44af2e7fec62bcb8a80772
- 0xef817c165948ff0de412d200f224f27c5d09058407ae562f914efdd55ab7c968
- 0xae7d2fd64b4e030d8e40b31d5fecc1e9628d7c3e6d4417551a5a489325af48f8
- 0x81a3446f02c64f6d41627940b5b306e47fbdf657b42b77610aa48bb98b0daa3a
- 0xa2f077da8b681666284efff3fa72164ae70e84714f1bfde2e50e7ede9b8a2c1e
- 0xa5660c01c6d80202806499156f403e91eaff1337f90d5cc5da894e4d90065136
- 0x4e79d33c25ca758a2e65bce3276e1b993b98712703de050f26dfdeb009d2099b
- 0x915047fd83f4ac923bed7c49fdd93482d256c066901f5966acf8a481ff6bd0b8
- 0x4c8fa606175c9cb1c3e3bd96088308174f83b262a092ba5ff94c58839714ede9
- 0xeaf6b21867367f85a965f982b6593c42eafe4fdf74e94b675523a6478de49a54
- 0x4277e02be0b5d91d78bc2247e37d402572474ba896c2e8f45765c8dc4e244d36
- 0x6f00f0da417f4126951ba8ba9b7962c847e91f5c61364ad9ad47e5f979698a60
- 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
- 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
- 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
- 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699
- Day root
- 0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795
- Chained
- 0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4
- Published
- On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4