← The evidence ledger
Evidence row 17103
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://pool.linkrra.com/api/billing/x402/models/gpt-oss-20b/chat/completions
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 88aa07918fd4728a24e00dcaea67348a3206e56419a78f0b2b396d31fd8aaac6
- Leaf
- 0x19dfa5d3b587629433a9042f6a941e4df4b4b48ec7d3fcbca8357f2834f816f9
What was observed
{
"endpoints": [
[
"x402",
"https://pool.linkrra.com/api/billing/x402/models/gpt-oss-20b/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 gpt-oss-20b (model \"gpt-oss-20b\") - fast + cheap general model. OpenAI-compatible chat completions for this one model, 32K context, served only on dedicated GPUs we operate, native 4-bit MXFP4. Pay per call in USDC on Base via x402 - no account, no API key. From $0.001 per call, usage-priced per token above that (GET /v1/models). Streaming supported. Product site: https://synap.linkrra.com",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"max_tokens": 256,
"messages": [
{
"content": "Write a Python function that reverses a string",
"role": "user"
}
],
"model": "gpt-oss-20b",
"stream": false
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"choices": [
{
"message": {
"content": "def reverse(s):\n return s[::-1]",
"role": "assistant"
}
}
],
"id": "chatcmpl-...",
"model": "gpt-oss-20b",
"object": "chat.completion",
"payment": {
"network": "eip155:8453",
"paidUsd": 0.001,
"transaction": "0x..."
},
"usage": {
"completion_tokens": 12,
"prompt_tokens": 16,
"total_tokens": 28
}
},
"type": "json"
}
},
"schema": {
"$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": "Optional: this endpoint always runs gpt-oss-20b.",
"enum": [
"gpt-oss-20b"
],
"type": "string"
},
"stream": {
"default": false,
"description": "true = stream OpenAI-format Server-Sent Events.",
"type": "boolean"
}
},
"required": [
"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": "2026-10-26T11:40:47.762Z",
"quality": {
"l30DaysTotalCalls": 14,
"l30DaysUniquePayers": 3,
"lastCalledAt": "2026-10-26T11:40:47.397Z"
},
"resource": "https://pool.linkrra.com/api/billing/x402/models/gpt-oss-20b/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 gpt-oss-20b (model \"gpt-oss-20b\") - fast + cheap general model. OpenAI-compatible chat completions for this one model, 32K context, served only on dedicated GPUs we operate, native 4-bit MXFP4. Pay per call in USDC on Base via x402 - no account, no API key. 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":"88aa07918fd4728a24e00dcaea67348a3206e56419a78f0b2b396d31fd8aaac6","id":17103,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793025325515899,"prev":null,"subject":"x402_bazaar:https://pool.linkrra.com/api/billing/x402/models/gpt-oss-20b/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 (296695 rows).
- 0x19e01024d09edfbd090027399132c9e95ba5e2a1aa8439d2535752457d0edd21
- 0x71699983363eb856d234dba82416b80c96ce118b1544d3dff7273fd6189148b5
- 0xbb7e34615e0bb8b274f1370cf2a5f4f8c01a136e4613269f16a0530ae261d559
- 0x84b499d6dada5942a2e5f5bba86ecaea9b161bdee3747a8f60f37d55d7b51c13
- 0xada7d1df6407cc9f227d5d2885e60396c89f916975882cbb94b8984b78003881
- 0x3eeb270332d7d3f7434f7f85d541f898fe34f7de68cd811287eb70bbdabe9292
- 0xd644b779a4d9ededfd35d175352dd85442dd30fc6f142fa4ea3bd1d86205f0a2
- 0x27bf90cbad43ae556c2c317f9067bee56b3ad5cc99c65509d6204c3c855f185b
- 0x010ded97cb4e626d148e532ee5af07654cf54f556620112d5ccd48aae313875b
- 0xd478fd085c7ea3fd088b49bdb4f1e37d8b042be5618e84d2e7ada3f1c6bf13f7
- 0x0ebd017eb4cb5f6f3c01ae6562748898aa3fb42b150504be21c4050acea38366
- 0x6a8a72430804a14ec575375f3d0ca4364f58310afb2c2e8c92b72f8b75809db9
- 0xe00c7829e46541e49a308807d357db902e06eff941a833217a8f0dbccd3964f1
- 0x770e4376196188c7fc9ec40f8e218dc0d1cb92bba5fe0425a0edce27ca9a997f
- 0x60582ab4b41e72eb70eb0bce07fbf0fb4d2b62a8bad5be50f5d16d511adc746c
- 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
- 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae