QuickBuild
Drop-in OpenAI Chat Completions endpoint: POST {model, messages, max_tokens, temperature, top_p, seed, stream, response_format} and get a chat.completion object (or SSE chunks with stream=true). Models (Cloudflare Workers AI): llama-3.1-8b (default), llama-3.2-3b, llama-3.2-1b, mistral-7b, granite-4.0-micro; any other model name maps to the default (actual model is in the response). Text only, no tool calling; max_tokens capped at 512, input up to 24000 chars. Latest user message checked by Llama Guard 3 (unsafe = 400). Fixed price per call. If the daily capacity is used up you get 503 "capacity". Errors are never charged. GET with ?prompt= also works; with no params it answers a short sample question. Free model list: GET /v1/models.
InferenceLiveeip155:8453Exactvia facilitator:payAI
LlmChatOpenai-compatibleInferenceAi
Activity
—
Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record.
$0.12
Verified settled volume
14 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0030
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x751a4c3841bE287544C371B4EE09Bd3366AeA7cfThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x751a4c3841bE287544C371B4EE09Bd3366AeA7cf",
"amount": "3000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://quickbuild.quynguyenbac.workers.dev/v1/chat/completions",
"description": "Drop-in OpenAI Chat Completions endpoint: POST {model, messages, max_tokens, temperature, top_p, seed, stream, response_format} and get a chat.completion object (or SSE chunks with stream=true). Models (Cloudflare Workers AI): llama-3.1-8b (default), llama-3.2-3b, llama-3.2-1b, mistral-7b, granite-4.0-micro; any other model name maps to the default (actual model is in the response). Text only, no tool calling; max_tokens capped at 512, input up to 24000 chars. Latest user message checked by Llama Guard 3 (unsafe = 400). Fixed price per call. If the daily capacity is used up you get 503 \"capacity\". Errors are never charged. GET with ?prompt= also works; with no params it answers a short sample question. Free model list: GET /v1/models.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"model": "llama-3.1-8b",
"prompt": "In one sentence, what does HTTP status 402 mean?",
"max_tokens": 128
},
"discoverable": true
},
"output": {
"type": "json",
"example": {
"id": "chatcmpl-3f2a9c",
"model": "@cf/meta/llama-3.1-8b-instruct-fp8-fast",
"usage": {
"total_tokens": 49,
"prompt_tokens": 22,
"completion_tokens": 27
},
"object": "chat.completion",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "HTTP 402 Payment Required means the server wants payment before it will serve the requested resource."
},
"finish_reason": "stop"
}
],
"created": 1792526400
}
}
},
"maxAmountRequired": "3000",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://quickbuild.quynguyenbac.workers.dev/v1/chat/completions",
"tags": [
"llm",
"chat",
"openai-compatible",
"inference",
"ai"
],
"mimeType": "application/json",
"description": "Drop-in OpenAI Chat Completions endpoint: POST {model, messages, max_tokens, temperature, top_p, seed, stream, response_format} and get a chat.completion object (or SSE chunks with stream=true). Models (Cloudflare Workers AI): llama-3.1-8b (default), llama-3.2-3b, llama-3.2-1b, mistral-7b, granite-4.0-micro; any other model name maps to the default (actual model is in the response). Text only, no tool calling; max_tokens capped at 512, input up to 24000 chars. Latest user message checked by Llama Guard 3 (unsafe = 400). Fixed price per call. If the daily capacity is used up you get 503 \"capacity\". Errors are never charged. GET with ?prompt= also works; with no params it answers a short sample question. Free model list: GET /v1/models.",
"serviceName": "QuickBuild"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"model": "llama-3.1-8b",
"prompt": "In one sentence, what does HTTP status 402 mean?",
"max_tokens": 128
}
},
"output": {
"type": "json",
"example": {
"id": "chatcmpl-3f2a9c",
"model": "@cf/meta/llama-3.1-8b-instruct-fp8-fast",
"usage": {
"total_tokens": 49,
"prompt_tokens": 22,
"completion_tokens": 27
},
"object": "chat.completion",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "HTTP 402 Payment Required means the server wants payment before it will serve the requested resource."
},
"finish_reason": "stop"
}
],
"created": 1792526400
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [],
"properties": {
"seed": {
"type": "integer",
"description": "Optional seed."
},
"model": {
"enum": [
"llama-3.1-8b",
"llama-3.2-3b",
"llama-3.2-1b",
"mistral-7b",
"granite-4.0-micro",
"@cf/meta/llama-3.1-8b-instruct-fp8-fast",
"@cf/meta/llama-3.2-3b-instruct",
"@cf/meta/llama-3.2-1b-instruct",
"@cf/mistral/mistral-7b-instruct-v0.1",
"@cf/ibm-granite/granite-4.0-h-micro"
],
"type": "string",
"description": "Model alias or Workers AI id (default llama-3.1-8b). Unknown names fall back to the default."
},
"top_p": {
"type": "number",
"maximum": 1,
"minimum": 0,
"description": "Nucleus sampling."
},
"prompt": {
"type": "string",
"description": "Convenience: a single user message (appended after `messages`)."
},
"stream": {
"type": "boolean",
"description": "If true, returns text/event-stream chat.completion.chunk events (whole answer in one chunk) ending with [DONE]."
},
"messages": {
"type": "array",
"items": {
"type": "object",
"required": [
"role",
"content"
],
"properties": {
"role": {
"enum": [
"system",
"developer",
"user",
"assistant"
],
"type": "string"
},
"content": {
"type": "string"
}
}
},
"description": "OpenAI-style chat messages. Optional: if omitted, `prompt` (or a sample question) is used."
},
"max_tokens": {
"type": "integer",
"maximum": 512,
"minimum": 1,
"description": "Max completion tokens (default and cap 512)."
},
"temperature": {
"type": "number",
"maximum": 2,
"minimum": 0,
"description": "Sampling temperature (model default if omitted)."
},
"response_format": {
"type": "object",
"description": "{\"type\":\"json_object\"} or {\"type\":\"json_schema\",\"json_schema\":{\"schema\":{...}}}."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"model": {
"type": "string"
},
"usage": {
"type": "object",
"properties": {
"total_tokens": {
"type": "integer"
},
"prompt_tokens": {
"type": "integer"
},
"completion_tokens": {
"type": "integer"
}
}
},
"object": {
"type": "string"
},
"choices": {
"type": "array",
"items": {
"type": "object",
"properties": {
"index": {
"type": "integer"
},
"message": {
"type": "object",
"properties": {
"role": {
"type": "string"
},
"content": {
"type": "string"
}
}
},
"finish_reason": {
"type": "string"
}
}
}
},
"created": {
"type": "integer"
}
}
}
}
}
}
}
}
},
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.003USDC≈ $0.003 USD
on Base · exact scheme
Pay 0.003 USDC on Base to 0x751a…eA7cf. The signed payment is good for 5 minutes.
- Paid to
- 0x751a…eA7cf
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 3000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x751a4c3841bE287544C371B4EE09Bd3366AeA7cf",
"amount": "3000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"model": "llama-3.1-8b",
"messages": [
{
"role": "user",
"content": "In one sentence, what does HTTP status 402 mean?"
}
],
"max_tokens": 128
}
},
"output": {
"type": "json",
"example": {
"id": "chatcmpl-3f2a9c",
"model": "@cf/meta/llama-3.1-8b-instruct-fp8-fast",
"usage": {
"total_tokens": 49,
"prompt_tokens": 22,
"completion_tokens": 27
},
"object": "chat.completion",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "HTTP 402 Payment Required means the server wants payment before it will serve the requested resource."
},
"finish_reason": "stop"
}
],
"created": 1792526400
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [],
"properties": {
"seed": {
"type": "integer",
"description": "Optional seed."
},
"model": {
"enum": [
"llama-3.1-8b",
"llama-3.2-3b",
"llama-3.2-1b",
"mistral-7b",
"granite-4.0-micro",
"@cf/meta/llama-3.1-8b-instruct-fp8-fast",
"@cf/meta/llama-3.2-3b-instruct",
"@cf/meta/llama-3.2-1b-instruct",
"@cf/mistral/mistral-7b-instruct-v0.1",
"@cf/ibm-granite/granite-4.0-h-micro"
],
"type": "string",
"description": "Model alias or Workers AI id (default llama-3.1-8b). Unknown names fall back to the default."
},
"top_p": {
"type": "number",
"maximum": 1,
"minimum": 0,
"description": "Nucleus sampling."
},
"prompt": {
"type": "string",
"description": "Convenience: a single user message (appended after `messages`)."
},
"stream": {
"type": "boolean",
"description": "If true, returns text/event-stream chat.completion.chunk events (whole answer in one chunk) ending with [DONE]."
},
"messages": {
"type": "array",
"items": {
"type": "object",
"required": [
"role",
"content"
],
"properties": {
"role": {
"enum": [
"system",
"developer",
"user",
"assistant"
],
"type": "string"
},
"content": {
"type": "string"
}
}
},
"description": "OpenAI-style chat messages. Optional: if omitted, `prompt` (or a sample question) is used."
},
"max_tokens": {
"type": "integer",
"maximum": 512,
"minimum": 1,
"description": "Max completion tokens (default and cap 512)."
},
"temperature": {
"type": "number",
"maximum": 2,
"minimum": 0,
"description": "Sampling temperature (model default if omitted)."
},
"response_format": {
"type": "object",
"description": "{\"type\":\"json_object\"} or {\"type\":\"json_schema\",\"json_schema\":{\"schema\":{...}}}."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"model": {
"type": "string"
},
"usage": {
"type": "object",
"properties": {
"total_tokens": {
"type": "integer"
},
"prompt_tokens": {
"type": "integer"
},
"completion_tokens": {
"type": "integer"
}
}
},
"object": {
"type": "string"
},
"choices": {
"type": "array",
"items": {
"type": "object",
"properties": {
"index": {
"type": "integer"
},
"message": {
"type": "object",
"properties": {
"role": {
"type": "string"
},
"content": {
"type": "string"
}
}
},
"finish_reason": {
"type": "string"
}
}
}
},
"created": {
"type": "integer"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-20 20:02Z
- Last indexed by Roundhouse
- 2026-10-23 13:16Z
- Last enriched (probe, favicon, geo)
- 2026-10-21 05:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service QuickBuild and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=QuickBuild' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://quickbuild.quynguyenbac.workers.dev/v1/chat/completions, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.