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x402 LLM Gateway — Long-Form Tier
x402
x402 LLM Gateway — Long-Form Tier is a paid API for AI agents from api.erb-llm.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Runs long-form chat completions (up to 8,192 output tokens) on a self-hosted 27B open-weight LLM, billed at $0.05 USDC per call via x402 on Base with no API key required.
Price / call$0.05
Success—
StatusUnknown
How this service works
Long-form tier of the x402 LLM gateway: same self-hosted 27B open-weight LLM with an 8,192-token output ceiling for summarization, drafting and multi-paragraph answers. Pay per call in USDC on Base via x402 - no API key or account. OpenAI-compatible: send a messages array, receive standard chat.completion JSON. Use the cheaper /v1/chat/completions tier (4,096 tokens) for short answers and tool calls.
Output
Returns a standard OpenAI-format chat.completion JSON object containing the assistant's generated message, finish reason, token usage counts (prompt and completion), and model identifier. Output text can be up to 8,192 tokens; requests specifying higher max_tokens values are silently clamped to 8,192.
Example use cases
Long-form research report drafting
“Draft a thorough 5-section report on the competitive landscape of electric vehicles in 2024, covering market share, key players, technology trends, regulatory environment, and outlook — I need at least 1,500 words and a balanced tone.”
Detailed document summarization
“I have a 10-page contract I pasted below — summarize it in detail, covering all major clauses, obligations, and risk factors, and give me at least 800 words so nothing important gets dropped.”
Multi-step technical explanation
“Explain how transformer attention mechanisms work, including self-attention, multi-head attention, and positional encoding, with concrete examples — give me a thorough answer, I'm trying to really understand it deeply.”
Technical details
Endpoint
POSThttps://api.erb-llm.com/v1/longWhen to prefer
Choose this endpoint when you need outputs longer than 1,024 tokens — such as full articles, detailed summaries, multi-section reports, or thorough explanations — and want to pay per call in USDC without an API key or account. Prefer the cheaper /v1/chat/completions (1,024-token) tier for short answers, tool calls, and classification tasks. Use the extended tier if you need outputs beyond 8,192 tokens.
Side effects
- Payment not included or insufficient USDC — request rejected with 402 Payment Required
- messages array missing or empty (minItems:1 violated) — 422 Unprocessable Entity
- max_tokens exceeds 8,192 — clamped silently to 8,192, not an error
- Model ID not found in /v1/models — may fall back to default or return 400
- Network or inference timeout on very long generations — 504 or partial response
- Malformed message roles (not system/user/assistant) — 422 validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | 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 | array | OpenAI chat messages (system/user/assistant). |
| max_tokens | integer | Optional output token ceiling. This tier caps output at 8192 tokens - higher values are clamped to 8192, not rejected. Use the long/extended tiers for bigger outputs. |
| temperature | number |
Tags
x402
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