Chat Completions OpenAI API
OpenAI-compatible chat completions: POST a standard {model, messages, max_tokens} body and get back the choices array plus usage. Same engine as /chat-completion-402, no signup and no API key.
InferenceLiveeip155:8453Exactvia facilitator:payAI
ChatCompletionsOpenaiLlmCompletion
Settlements · 30d
548↓ 79%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$4.00
Verified settled volume
548 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
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
$0.14
Upstream on-chain volume
31 transactions, checked 2026-11-08 06:45Z
Paid to
0xb41cf7b6ef68b193f56d17928d9fe11afbed66c5The wallet the 402 directs payment to. Its full payment record 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.
Recent payments · which agents last used it
Every indexed settlement paid to this service’s wallet, newest first. The index does not record which endpoint a payment was for, so if this wallet serves more than one endpoint, the rows include payments for the others. Paged up to the newest 5,000; the full history is on the merchant page.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change. Always read the 402 the endpoint answers with.
{
"ok": false,
"reason": "payment required",
"verify": "https://pursekeeper.dev/v1/verify?hash=<send_block_hash>&to=nano_1sbj5thkotazuxnntziua96q76zpiu3n7fwgyfws43qcmrrkb7cix5ioymnf&min_raw=3000000000000000000000000000",
"accepts": [
{
"asset": "XNO",
"extra": {
"work": "optional"
},
"payTo": "nano_1sbj5thkotazuxnntziua96q76zpiu3n7fwgyfws43qcmrrkb7cix5ioymnf",
"amount": "3000000000000000000000000000",
"scheme": "exact",
"network": "nano:mainnet",
"mimeType": "application/json",
"resource": "https://llmrt-companion.manhliemcn4euwlu.workers.dev/v1/chat/completions",
"maxAmountRequired": "3000000000000000000000000000",
"maxTimeoutSeconds": 600
},
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb41cf7b6ef68b193f56d17928d9fe11afbed66c5",
"amount": "973",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://llmrt-companion.manhliemcn4euwlu.workers.dev/v1/chat/completions",
"maxAmountRequired": "973",
"maxTimeoutSeconds": 600
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "7mh9E7x9s1F8j95B97KqCoHES1wqHa8HEPPPYwnexuR2"
},
"payTo": "7mh9E7x9s1F8j95B97KqCoHES1wqHa8HEPPPYwnexuR2",
"amount": "973",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"mimeType": "application/json",
"resource": "https://llmrt-companion.manhliemcn4euwlu.workers.dev/v1/chat/completions",
"maxAmountRequired": "973",
"maxTimeoutSeconds": 600
}
],
"input_ok": false,
"order_id": "4442a301cbcc45c0",
"resource": {
"url": "https://llmrt-companion.manhliemcn4euwlu.workers.dev/v1/chat/completions",
"tags": [
"chat",
"completions",
"openai",
"llm",
"completion"
],
"iconUrl": "https://llmrt-companion.manhliemcn4euwlu.workers.dev/icon.png",
"mimeType": "application/json",
"description": "OpenAI-compatible chat completions: POST a standard {model, messages, max_tokens} body and get back the choices array plus usage. Same engine as /chat-completion-402, no signup and no API key.",
"queryParams": [
"prompt",
"system",
"model",
"max_tokens"
],
"serviceName": "Chat Completions OpenAI API"
},
"price_usd": "0.000973",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"model": "llmrt-chat",
"messages": [
{
"role": "user",
"content": "Reply with OK"
}
],
"max_tokens": 16
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"usage": {
"total_tokens": 3
},
"choices": [
{
"message": {
"role": "assistant",
"content": "OK"
}
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"messages"
],
"properties": {
"model": {
"type": "string",
"example": "llmrt-chat"
},
"messages": {
"type": "array",
"items": {
"type": "object",
"required": [
"role",
"content"
],
"properties": {
"role": {
"type": "string"
},
"content": {
"type": "string"
}
}
}
},
"max_tokens": {
"type": "number",
"example": 256
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"preflight": {
"info": {
"url": "https://llmrt-companion.manhliemcn4euwlu.workers.dev/.well-known/x402-preflight",
"spec": "threews.x402.preflight.v1",
"same_origin": "/.well-known/x402-preflight"
}
}
},
"resend_with": "GET https://llmrt-companion.manhliemcn4euwlu.workers.dev/v1/chat/completions?ref=4442a301cbcc45c0",
"x402Version": 2,
"nano_address": "nano_1sbj5thkotazuxnntziua96q76zpiu3n7fwgyfws43qcmrrkb7cix5ioymnf",
"nano_network": "nano:mainnet",
"what_you_get": "LLM chat completion",
"input_problem": "missing required parameter: prompt",
"nano_amount_raw": "3000000000000000000000000000",
"nano_amount_xno": "0.003",
"retry_same_address": "GET https://llmrt-companion.manhliemcn4euwlu.workers.dev/v1/chat/completions returns this same order and address"
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying: a price here is a claim, not a quote.
0.000958USDC≈ $0.000958 USD
on Base · exact scheme
Pay 0.000958 USDC on Base to 0xb41c…d66c5. The signed payment is good for 10 minutes.
- Paid to
- 0xb41c…d66c5
- USD Coin contract
- 0x8335…02913
- Payment window
- 10 minutes
- As published
- 958 smallest units
973units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 7mh9E7…exuR2
- Token contract
- EPjFWd…TDt1v
- Payment window
- 30 minutes
3000000000000000000000000000units
on nano:mainnet · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- nano_3…ia6r8
- Token contract
- XNO
- Payment window
- 30 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb41cf7b6ef68b193f56d17928d9fe11afbed66c5",
"amount": "958",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "7mh9E7x9s1F8j95B97KqCoHES1wqHa8HEPPPYwnexuR2"
},
"payTo": "7mh9E7x9s1F8j95B97KqCoHES1wqHa8HEPPPYwnexuR2",
"amount": "973",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"resource": "https://llmrt-companion.manhliemcn4euwlu.workers.dev/v1/chat/completions",
"maxTimeoutSeconds": 1800
},
{
"asset": "XNO",
"extra": {
"work": "optional"
},
"payTo": "nano_3z3ymu6q1towcy6gwud67n9s1r4sh84ynpgkc3gn8h7x3g8msnd5h73ia6r8",
"amount": "3000000000000000000000000000",
"scheme": "exact",
"network": "nano:mainnet",
"resource": "https://llmrt-companion.manhliemcn4euwlu.workers.dev/v1/chat/completions",
"maxTimeoutSeconds": 1800
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"model": "llmrt-chat",
"messages": [
{
"role": "user",
"content": "Reply with OK"
}
],
"max_tokens": 16
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"usage": {
"total_tokens": 3
},
"choices": [
{
"message": {
"role": "assistant",
"content": "OK"
}
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"messages"
],
"properties": {
"model": {
"type": "string",
"example": "llmrt-chat"
},
"messages": {
"type": "array",
"items": {
"type": "object",
"required": [
"role",
"content"
],
"properties": {
"role": {
"type": "string"
},
"content": {
"type": "string"
}
}
}
},
"max_tokens": {
"type": "number",
"example": 256
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-11-08 09:16Z
- Last indexed by Roundhouse
- 2026-11-14 00:45Z
- Last enriched (probe, favicon, geo)
- 2026-11-08 06:45Z
- x402 version
- 2
- Max timeout
- 600s
- 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
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Chat Completions OpenAI API 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=Chat%20Completions%20OpenAI%20API' 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://llmrt-companion.manhliemcn4euwlu.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.