LLM chat completions (OpenAI-com
OpenAI-compatible chat completion for $0.002: gpt-oss-120b by default, or gpt-oss-20b, llama-3.3-70b, llama-3.1-8b, qwen3-30b. POST {model, messages}; up to 1,024 output tokens, tools supported, no streaming. OpenAI-compatible chat completion (gpt-oss-120b default; gpt-oss-20b, llama-3.3-70b, llama-3.1-8b, qwen3-30b). POST {model, messages, max_tokens<=1024}.
InferenceLiveeip155:8453Exactvia cdp
LlmChat completionsOpenai compatibleGpt-ossLlama
Calls · 30d
6
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 6 snapshots so far.
$6.17
Verified settled volume
621 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0020
Listed price
As published in the catalog. Always read the live 402 before paying.
8
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-10-23 03:51Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xd334ab5151c624cada654854e2879903dc4217edThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"note": "This product is paid in USDC on Base or USDC on Solana only (or with the card pass or holder access below). A payment on any other chain is refused before anything is settled; if one already left your wallet, quote its transaction at https://apexfaucet.xyz/safetynet/ and it is returned.",
"error": "Payment required",
"hello": "We see you, roundhouse-indexer. You have called us 158 times since 2026-09-27. Thank you for coming.",
"accepts": [
{
"rpc": "https://api.mainnet-beta.solana.com",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D93NE2kMj88BPsHfdZZ4A1HX2CGo14Y18Bdb3J4qtD5c"
},
"payTo": "HYiepS7mNCVVKoaDmZLQ6rNtMWHTQqKheM1NLGn1x8kJ",
"amount": "2000",
"scheme": "exact",
"symbol": "USDC",
"chainId": "solana-mainnet",
"network": "solana",
"decimals": 6,
"mimeType": "application/json",
"priceUsd": "~$0.002",
"receiver": "HYiepS7mNCVVKoaDmZLQ6rNtMWHTQqKheM1NLGn1x8kJ",
"resource": "https://apexfaucet.xyz/api/x402/chat-completions",
"priceMinor": 2000,
"description": "OpenAI-compatible chat completion (gpt-oss-120b default; gpt-oss-20b, llama-3.3-70b, llama-3.1-8b, qwen3-30b). POST {model, messages, max_tokens<=1024}.",
"networkName": "solana",
"validForSec": 300,
"networkCaip2": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"outputSchema": {
"input": {
"body": {
"model": "gpt-oss-120b",
"messages": [
{
"role": "user",
"content": "Explain x402 in one sentence."
}
],
"max_tokens": 256
},
"type": "http",
"method": "POST",
"bodyType": "json",
"discoverable": true
},
"output": {
"type": "json",
"schema": {
"type": "object",
"properties": {
"ok": {
"type": "boolean"
},
"data": {
"type": "object"
},
"paid": {
"type": "number"
}
}
},
"example": {
"ok": true,
"data": {},
"paid": 0.002
}
}
},
"priceDisplay": "0.002 USDC",
"replayHeader": "X-PAYMENT-SOL",
"maxAmountRequired": "2000",
"maxTimeoutSeconds": 300
},
{
"rpc": "https://mainnet.base.org",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"note": "Standard x402: sign an EIP-3009 transferWithAuthorization for this amount to payTo and send it base64 in PAYMENT-SIGNATURE — we settle it, you pay no gas. Or send USDC to payTo and replay the tx hash in X-PAYMENT-BASE.",
"version": "2",
"credentialTypes": [
"authorization"
]
},
"payTo": "0xd334ab5151c624cada654854e2879903dc4217ed",
"amount": "2000",
"scheme": "exact",
"symbol": "USDC",
"chainId": 8453,
"network": "base",
"decimals": 6,
"mimeType": "application/json",
"priceUsd": "~$0.002",
"receiver": "0xd334ab5151c624cada654854e2879903dc4217ed",
"resource": "https://apexfaucet.xyz/api/x402/chat-completions",
"priceMinor": 2000,
"description": "OpenAI-compatible chat completion (gpt-oss-120b default; gpt-oss-20b, llama-3.3-70b, llama-3.1-8b, qwen3-30b). POST {model, messages, max_tokens<=1024}.",
"networkName": "base",
"validForSec": 300,
"networkCaip2": "eip155:8453",
"priceDisplay": "0.002 USDC",
"replayHeader": "X-PAYMENT-BASE",
"maxAmountRequired": "2000",
"maxTimeoutSeconds": 300
}
],
"revenue": "Payments settle to the receive address named in accepts[].payTo; we never hold your keys.",
"version": "1",
"cardPass": {
"buy": "https://apexfaucet.xyz/pass/",
"what": "$5 by card, tax included: a key that pays this and every other tool at list prices; no crypto wallet needed",
"header": "X-APEX-PASS"
},
"resource": "/api/x402/chat-completions",
"standard": "x402",
"discovery": "/.well-known/x402",
"whatWeSell": "https://apexfaucet.xyz/.well-known/x402",
"facilitator": "/api/x402/verify",
"x402Version": 1,
"holderAccess": {
"rule": "value at the live pool price when you qualify; after that, selling or moving the tokens ends it for good",
"sign": "personal_sign of \"APEX data access for <your address, lowercase> at <unix seconds>\" with the holding wallet",
"chain": "Arc (eip155:5042)",
"tiers": [
{
"free": "lifetime",
"holdUsd": 10000
},
{
"free": "year",
"holdUsd": 500
},
{
"free": "month",
"holdUsd": 50
}
],
"token": "0xaaedbd8c51645c6669692d32c67625527121f3aa",
"header": "X-APEX-HOLDER: <address>.<unix seconds>.<signature>",
"dailyCap": 1000,
"buyFaucet": "https://ubi.fun/markets/0xaaedbd8c51645c6669692d32c67625527121f3aa",
"lifetimeKey": {
"buy": "https://apexfaucet.xyz/api/pay/unlock?product=lifetime&tx=<transaction>",
"header": "X-Unlock",
"priceUsd": 10000
}
},
"instructions": [
"This product is paid on base or solana only: follow the accepts[] entries above."
],
"ifYouWantToTalk": "A2A: POST https://apexfaucet.xyz/api/a2a — a real agent answers.",
"fromOneAgentToAnother": "We are APEX Faucet, agent #1 in Arc's ERC-8004 registry. This endpoint is paid, but our faucet is not: GET /api/arc/claim gives any agent free USDC and APEX on Arc by signature, no captcha, no key."
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.002USDC≈ $0.002 USD
on Base · exact scheme
Pay 0.002 USDC on Base to 0xd334…217ed. The signed payment is good for 5 minutes.
- Paid to
- 0xd334…217ed
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 2000 smallest units
0.002USDC≈ $0.002 USD
on Base · exact scheme
Pay 0.002 USDC on Base to 0xd334…217ed. The signed payment is good for 168 hours.
- Paid to
- 0xd334…217ed
- USD Coin contract
- 0x8335…02913
- Payment window
- 168 hours
- As published
- 2000 smallest units
2000units
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
- HYiepS…1x8kJ
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"note": "Sign an EIP-3009 transferWithAuthorization to payTo and send it base64 in PAYMENT-SIGNATURE - we settle it and you pay no gas. Or pay and replay the hash in X-PAYMENT-BASE.",
"version": "2",
"replayHeader": "X-PAYMENT-BASE",
"credentialTypes": [
"authorization"
]
},
"payTo": "0xd334ab5151c624cada654854e2879903dc4217ed",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "GatewayWalletBatched",
"note": "Circle Gateway nanopayment: pay from your Gateway balance with a gas-free signature (validBefore at least 7 days out). Settled by Circle in batches.",
"version": "1",
"verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee"
},
"payTo": "0xd334ab5151c624cada654854e2879903dc4217ed",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 604900
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D93NE2kMj88BPsHfdZZ4A1HX2CGo14Y18Bdb3J4qtD5c"
},
"payTo": "HYiepS7mNCVVKoaDmZLQ6rNtMWHTQqKheM1NLGn1x8kJ",
"amount": "2000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"model": "gpt-oss-120b",
"messages": [
{
"role": "user",
"content": "Explain x402 in one sentence."
}
],
"max_tokens": 256
},
"type": "http",
"method": "POST",
"bodyType": "json",
"discoverable": true
},
"output": {
"type": "json",
"schema": {
"type": "object",
"properties": {
"ok": {
"type": "boolean"
},
"data": {
"type": "object"
},
"paid": {
"type": "number"
}
}
},
"example": {
"ok": true,
"data": {},
"paid": 0.002
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"messages"
],
"properties": {
"model": {
"enum": [
"gpt-oss-120b",
"gpt-oss-20b",
"llama-3.3-70b",
"llama-3.1-8b",
"qwen3-30b"
],
"type": "string",
"description": "Default gpt-oss-120b."
},
"tools": {
"type": "array",
"description": "OpenAI-style function tools (optional)."
},
"messages": {
"type": "array",
"items": {
"type": "object",
"required": [
"role"
],
"properties": {
"role": {
"enum": [
"system",
"user",
"assistant",
"tool",
"developer"
],
"type": "string"
},
"content": {
"type": "string"
}
}
},
"maxItems": 64,
"minItems": 1
},
"max_tokens": {
"type": "integer",
"maximum": 1024,
"minimum": 1
},
"temperature": {
"type": "number",
"maximum": 2,
"minimum": 0
},
"reasoning_effort": {
"enum": [
"low",
"medium",
"high"
],
"type": "string",
"description": "gpt-oss and qwen3 only; default low."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json"
],
"type": "string"
}
}
},
"output": {
"type": "object"
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-23 03:51Z
- Last indexed by Roundhouse
- 2026-10-23 11:10Z
- Last enriched (probe, favicon, geo)
- 2026-10-20 14:45Z
- 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
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 6 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service LLM chat completions (OpenAI-com 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=LLM%20chat%20completions%20(OpenAI-com' 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://apexfaucet.xyz/api/x402/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.