x402-llm-gateway
OpenAI-compatible chat completions served by a self-hosted 27B open-weight LLM. Pay per call in USDC on Base via x402 - no API key or account. Use it for text generation, summarization, classification and agent tool calls that need cheap, private inference. Send a messages array (plus optional model, max_tokens, temperature); receive standard OpenAI chat.completion JSON. A free trial (POST /v1/trial) is open during promo windows.
Inferenceoffline · HTTP 530eip155:8453Exactvia cdp
LlmChatInferenceOpenai-compatibleUsdc
Calls · 30d
17→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 5 snapshots so far.
$1.43
Verified settled volume
59 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
17
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-08 21:10Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x23976FB6Af8f7fE8756730f0473fB7FfaC531ee8The 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.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x2397…31ee8. The signed payment is good for 5 minutes.
- Paid to
- 0x2397…31ee8
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x23976FB6Af8f7fE8756730f0473fB7FfaC531ee8",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"model": "qwen/qwen3.8-27b",
"messages": [
{
"role": "system",
"content": "You are a helpful assistant."
},
{
"role": "user",
"content": "Reply with exactly one word: hello"
}
],
"max_tokens": 16,
"temperature": 0.2
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"id": "chatcmpl-abc123",
"x402": {
"tier": "quick",
"charged": "$0.005",
"output_cap": 4096,
"tokens_out": 1,
"inference_ms": 1830
},
"model": "qwen/qwen3.8-27b",
"usage": {
"total_tokens": 31,
"prompt_tokens": 30,
"completion_tokens": 1
},
"object": "chat.completion",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "hello"
},
"finish_reason": "stop"
}
]
}
}
},
"schema": {
"type": "object",
"$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",
"description": "Model ID from the free GET /v1/models endpoint (e.g. qwen/qwen3.8-27b). Optional - a default chat model is chosen if omitted."
},
"messages": {
"type": "array",
"items": {
"type": "object",
"required": [
"role",
"content"
],
"properties": {
"role": {
"enum": [
"system",
"user",
"assistant"
],
"type": "string"
},
"content": {
"type": "string"
}
}
},
"minItems": 1,
"description": "OpenAI chat messages (system/user/assistant)."
},
"max_tokens": {
"type": "integer",
"minimum": 1,
"description": "Optional output token ceiling. This tier caps output at 4096 tokens - higher values are clamped to 4096, not rejected. Use the long/extended tiers for bigger outputs."
},
"temperature": {
"type": "number",
"maximum": 2,
"minimum": 0
}
}
},
"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",
"properties": {
"id": {
"type": "string"
},
"x402": {
"type": "object",
"properties": {
"note": {
"type": "string"
},
"tier": {
"type": "string"
},
"charged": {
"type": "string"
},
"output_cap": {
"type": "integer"
},
"tokens_out": {
"type": "integer"
},
"capped_from": {
"type": "integer"
},
"inference_ms": {
"type": "integer"
}
},
"description": "Billing stamp added by the gateway."
},
"model": {
"type": "string"
},
"usage": {
"type": "object",
"properties": {
"total_tokens": {
"type": "integer"
},
"prompt_tokens": {
"type": "integer"
},
"completion_tokens": {
"type": "integer"
}
}
},
"object": {
"const": "chat.completion"
},
"choices": {
"type": "array",
"items": {
"type": "object",
"properties": {
"index": {
"type": "integer"
},
"message": {
"type": "object",
"properties": {
"role": {
"type": "string"
},
"content": {
"type": "string"
}
}
},
"finish_reason": {
"type": "string"
}
}
}
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-08 21:10Z
- Last indexed by Roundhouse
- 2026-09-09 18:40Z
- Last enriched (probe, favicon, geo)
- 2026-09-24 07:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 530
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. 5 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 x402-llm-gateway 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=x402-llm-gateway' 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://api.erb-llm.com/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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.