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FreeTier Agent API — LLM Pricing Lookup
x402
FreeTier Agent API — LLM Pricing Lookup is a paid API for AI agents from freetier-agent-api.pages.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-18).
Returns AI model pricing data (input/output cost per million tokens, context window size) with optional filtering by provider, free tier, vision, tools support, and more
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-call data API for AI agents: AI model prices and cost calculator, 4,259 MCP servers, email domain checks, text-to-JSON extraction, country/holiday/currency lookup, page and link checks, page-to-markdown, 2,230 verified APIs. x402, USDC on Base, no signup. Sources cited in every response.
Output
A JSON object containing a count of matched models and an array of model objects, each with model ID, provider, input price per million USD, output price per million USD, and max input tokens. Also includes source citations and free tier details where applicable.
Example use cases
Find cheapest free-tier LLM
“Show me all AI models that have a free tier available, sorted by input price per million tokens — I want to find the most cost-effective option for testing.”
Compare provider pricing for budgeting
“What does OpenAI charge per million input and output tokens across their models? I need to budget for a production deployment.”
Filter vision-capable models by price
“List the top 5 vision-capable AI models with at least 32k context window, sorted by output cost per million tokens.”
Technical details
Endpoint
GEThttps://freetier-agent-api.pages.dev/api/llm-pricing?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs up-to-date, structured LLM pricing data with flexible filtering — especially when comparing models across providers by cost, context window, or capability (vision, tools). Prefer this over static datasets or web scraping when you need cited, machine-readable pricing that includes free tier information.
Side effects
- Invalid enum value for sort/free/vision/tools parameters returns an error
- No models match the filter criteria — returns empty models array
- min_context or limit supplied as non-numeric string may cause parsing errors
- Payment not fulfilled (x402) — endpoint returns 402 Payment Required before data is served
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 1,
"models": [
{
"id": "gpt-4o-mini",
"provider": "openai",
"input_per_m_usd": 0.15,
"max_input_tokens": 128000,
"output_per_m_usd": 0.6
}
],
"sources": [],
"free_tiers": []
}
}Tags
x402
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