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LLM API Agent Quote & Purchase Guide
x402
LLM API Agent Quote & Purchase Guide is a free API for AI agents from agents.llmapi.ai, callable via x402, Free, status healthy (last checked 2026-10-17).
Returns a free, wallet-proof quote and step-by-step purchase guide for any LLM API seller endpoint, including contract details, pricing, and prerequisites — without executing any purchase.
Price / callFree
Success—
StatusHealthy
How this service works
LLM API offers pay per call inference on a curated set of frontier models. OpenAI compatible chat completions, Anthropic native messages, the Responses API, and embeddings, billed by exact token usage. Responses are non streaming; set stream to false. The full model catalog is available with an LLM API account at llmapi.ai. This server is a transparent proxy in front of LLM API's own API that sells access on plans (credit or subscription) rather than per call: call the upstream API's paths here and the proxy handles identity, payment, and proxying. Agents can purchase autonomously or with their human's approval. No seller API operations have been verified for this document; consult the upstream API reference. The live catalog at /manifest.json is authoritative for prices and any free included units (prices[].includedUnits).
Output
A JSON response containing a status field (e.g. 'quoted', 'ready', 'needs_input'), a confirmed price of $0 for the lookup itself, a markdown-formatted guide with the matched API contract, exact pricing, prerequisites, and recommended next steps, plus a wallet-free advisor URL for further planning.
Example use cases
Budget check before autonomous deployment
“I'm about to deploy an autonomous agent that will call LLM API for text summarization — can you get me a free quote for 1000 calls with a $20 budget using x402 payment, no human in the loop, so I can see the contract and prerequisites before I commit anything?”
Comparing API costs for a project
“I want to use LLM API for embedding generation on about 200 documents, with a total budget of $5 USD paid by card — can you look up the price and guide me through what I'd need to get started, without actually buying anything yet?”
First-time API setup guidance
“I'm new to LLM API and want to understand what it would cost and what steps I need to follow to use their chat completions API for my app — can you pull me a free quote for 50 calls using mpp payment and walk me through the contract and next steps?”
Technical details
Endpoint
POSThttps://agents.llmapi.ai/zeroclick/agent/quote?utm_source=zero.xyzWhen to prefer
Use this endpoint when an agent or user wants to understand pricing, contract terms, and prerequisites for any LLM API seller capability before committing to a purchase — especially in zero-wallet or wallet-proof contexts. It is the right first step for autonomous agents that need to plan spending, verify feasibility, or obtain a guide without triggering any financial transaction. Prefer it over the paid endpoint or the /zeroclick/agent/guide endpoint when you want a structured quote tied to a specific goal, quantity, and budget.
Side effects
- 'needs_input' status when the goal description is too vague to match an API contract
- 'unsupported' or 'blocked' status if the requested capability is not available on the platform
- 'unavailable' status if the upstream catalog is temporarily unreachable
- Goal string exceeds 2000 characters, causing a 400 validation error
- Invalid budgetUsd format (e.g. negative or non-numeric) triggers schema validation failure
- Unknown payment enum value causes a 400 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| goal | string | Describe the task and known inputs. Do not include credentials. |
| payment | string | Known payment method for the eventual purchase, independent of this free lookup's wallet proof. |
| quantity | integer | Number of API calls, not returned items. Omit when unknown; describe desired output in goal. |
| budgetUsd | string | Total cash budget in USD. A quote does not authorize spending. |
| requirements | string | |
| humanAvailable | boolean | Whether a human is in the loop. False recommends anonymous auth for a new autonomous identity; omit when unknown. Executing a human's request without further interruptions does not by itself mean false. |
| budgetExclusive | boolean | |
| reviewAfterCalls | integer |
Output
Schema · Response
{
"type": "json",
"example": {
"guide": "Task support is not established. Use the advisor to resolve missing details before purchasing.",
"status": "unknown",
"guideUrl": "https://agents.llmapi.ai/zeroclick/agent/guide",
"priceUsd": "0"
}
}Tags
x402
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