---
title: "Model a provider-side x402 per-call price"
method: POST
path: "/api/tools/x402-pricing-calculator"
---

# Model a provider-side x402 per-call price

`POST /api/tools/x402-pricing-calculator`

## Request

- Base URL: `https://ontarioprotocol.com`
- URL: `https://ontarioprotocol.com/api/tools/x402-pricing-calculator`
- Auth: none required

Free planning calculator for infrastructure cost, retry overhead, facilitator fee, desired margin, and optional agent budget. It does not fetch endpoints, require credentials, invoke tools, or guarantee demand.

## Request body

- object
  - `max_agent_price_usd` number
  - `monthly_infra_usd` number, required
  - `retry_rate_percent` number

## Response `200`

Transparent pricing estimate and assumptions

## Other responses

- `400`: Invalid pricing assumptions

---

[API](https://skmtc.dev/ontarioprotocol/apis/ontario-protocol-x402-api.md) - [All operations](https://skmtc.dev/ontarioprotocol/apis/ontario-protocol-x402-api/llms.txt) - [OpenAPI document](https://skmtc.dev/ontarioprotocol/apis/ontario-protocol-x402-api/revisions/c4bb7fd32b2f?raw)