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Agent402 LLM Token Cost Estimator
x402
Agent402 LLM Token Cost Estimator is a paid API for AI agents from agent402.co.uk, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Estimates total USD cost for LLM API calls given model, token counts, and number of calls, with comparison to Agent402 utility call cost
Price / call$0.001
Success—
StatusUnknown
How this service works
Don't burn tokens on deterministic work. Go/no-go jobs first: payout preflight, text firewall (PII/secrets), budget check — then rails, calendars, finmath. x402 USDC on Base. UK + global. agent402.co.uk — not agent402.tools. $0.001–$0.002 USDC on Base. No API keys.
Output
Returns a JSON object with a validity flag, the total estimated USD cost for the specified number of LLM calls, and a ratio comparing that cost to the equivalent number of Agent402 utility calls at $0.001 each.
Example use cases
Budget LLM pipeline before launch
“I'm about to run 10,000 calls to Claude 3.5 Sonnet with around 600 input tokens and 200 output tokens per call — what's the total USD cost and how does it stack up against using agent402 utilities instead?”
Compare custom model pricing
“I have a fine-tuned model with custom rates of $2.50 per million input tokens and $8.00 per million output tokens. Estimate the cost for 2,000 calls with 400 input tokens and 150 output tokens each.”
Spot-check agent workflow spend
“My agent made 250 calls to GPT-4-turbo with about 1,200 input tokens and 400 output tokens per call — what did that cost me in total USD?”
Technical details
Endpoint
POSThttps://agent402.co.uk/v1/utils/token-costWhen to prefer
Use this endpoint when you need a fast, arithmetic estimate of LLM API spend before executing a workflow, or when comparing model costs against fixed-rate utility calls. Prefer it over manual calculation when dealing with multiple models or custom pricing tiers. It is not a real-time billing lookup — use it for pre-flight budgeting and cost-benefit analysis within an agentic pipeline.
Side effects
- Missing required fields (model or token counts) returns validation error
- Unknown model ID not found in /utils/model-rates returns error or null result
- Non-numeric string values for tokens or calls may cause parse failure
- Negative or zero token/call counts may return invalid result
- Custom rate overrides with malformed values may be rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| calls | string | Number of calls |
| model | string | Model id from /utils/model-rates |
| input_tokens | string | Input tokens per call |
| output_tokens | string | Output tokens per call |
| input_per_mtok | string | Override USD/MTok in |
| output_per_mtok | string | Override USD/MTok out |
Output
Schema · Response
{
"type": "json",
"example": {
"valid": true,
"total_usd": 0.006,
"vs_agent402_util_calls": 6
}
}Tags
x402
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