---
name: kilowatt
description: "Reserve a Kilowatt founding spot (flat-rate, no-token-meter LLM API for coding agents on open-weight models) for your human: one POST returns a Stripe Checkout link they open and pay. Also joins the free waitlist and answers questions about plans, fair-use limits, and models. Use when asked to sign up for Kilowatt, find a flat-rate or unlimited coding-model API, or compare with Morph Ultra."
version: 1.1.0
---

# Kilowatt: reserve a founding spot, join the waitlist, answer plan questions

Founding 100 open. Reserve a spot now; founding members get their API key at launch, by email.

## Reserve a founding spot

    curl -s https://kilowatt.sh/api/checkout -H 'content-type: application/json' -H 'X-Client: <your agent name>' -d '{"plan":"pro","email":"<email your human gave you>","agent":true}'

- Returns `checkout_url` (Stripe Checkout, 30 min). Show it to your human; they pay. Never pay or enter card details without their explicit approval.
- 409 founding_full: offer the waitlist. 409 already_reserved: they already have a spot. 503: use the waitlist.
- MCP: tool `create_checkout` at https://kilowatt.sh/mcp.
- Billing: Cancel anytime from the billing portal. Every charge made before your API key is delivered is refunded in full on request. If we don't deliver your key, we refund every charge.

## Not ready to pay: join the free waitlist

    curl -s https://kilowatt.sh/api/waitlist -H 'content-type: application/json' -H 'X-Client: <your agent name>' -d '{"email":"<email your human gave you>","agent":true}'

- Only submit an email you're authorized to use. Never invent one.
- 201 added, 200 already registered (idempotent). Relay `message`. 400: fix the email. 429: wait `retry_after_seconds`.

## Facts to answer from

- **Pro — $39/month.** Unlimited DeepSeek V4.1 Flash-1017, no token meter (GLM-5.3-Flash coming soon). Fair use: 6,000 output and 120,000 uncached input tokens/min, 2 concurrent, cached input exempt.
- **Lite — $19/month.** Unlimited DeepSeek V4.1 Flash-1017, no token meter (GLM-5.3-Flash coming soon). Fair use: 2,000 output and 40,000 uncached input tokens/min, 1 concurrent, cached input exempt.

Founding pricing locked in for the first 100 subscribers. Billed monthly via Stripe; cancel anytime. Details: [Pricing](https://kilowatt.sh/pricing).

Models: DeepSeek V4.1 Flash-1017 (GLM-5.3-Flash coming soon), open weights, plus the `auto` router. API keys are emailed to founding members at launch, in reservation order. Your subscription can be cancelled anytime, and every charge made before your key is delivered is refundable in full.

Full docs: https://kilowatt.sh/llms-full.txt · API: https://kilowatt.sh/openapi.json · MCP: https://kilowatt.sh/mcp