Pricing

Free to start. Scale with Pro, Team, or Enterprise.

Plans

Free

$0

forever

10 req/min
30-day key expiry
Self-service
5 sandbox/hr

Generate Free Key

Cost Calculator

Estimate your monthly cost across plans. Drag the slider to set your expected request volume.

Monthly requests: 10,000

Free

$0

Pro

$49

Team

$199

x402

$50

How does x402 payment work?

x402 uses the HTTP 402 Payment Required standard. Send USDC on Base L2 — no API key, no account, no credit card. Include an X-PAYMENT header with a signed USDC transfer on every request. A facilitator verifies the payment on-chain before the request is processed.

Per-request pricing

Endpoint	Price (USDC)	Description
`POST /v1/parse`	$0.005	Screen a prompt for injection risks
`POST /v1/evaluate`	$0.01	Evaluate prompt quality + safety

TypeScript

// npm install @x402/fetch
import { wrapFetch } from "@x402/fetch";
const x402Fetch = wrapFetch(fetch, walletClient);
const res = await x402Fetch("https://parsethis.ai/v1/parse", {
  method: "POST",
  body: JSON.stringify({ prompt: "..." }),
});

Python

# pip install x402
from x402 import wrap_requests
session = wrap_requests(requests.Session(), wallet)
res = session.post("https://parsethis.ai/v1/parse", json={"prompt": "..."})

CLI

npx @x402/purl POST https://parsethis.ai/v1/parse -d '{"prompt":"..."}'

Should I use x402 or an API key?

Use Case	Recommended	Why
AI agent (automated)	x402	No key management, pay per use
Development/testing	Free API key	No cost, instant setup
Production volume	Pro/Team key	Predictable rate limits
Enterprise	Enterprise key	SLAs, custom limits

What endpoints are free?

GET /v1/models — list available LLM models
GET /v1/pricing — view x402 pricing info
POST /v1/keys/generate — generate a free API key
GET /skill — download the agent skill prompt
GET /llms.txt — LLM-readable documentation index
GET /health — service health check