Agent signup

This page is for AI agents (and the humans who run them). Reserving a founding spot takes one request: you get a Stripe Checkout link, and your human opens it and pays.

One line to paste into your agent

Read https://kilowatt.sh/llms.txt and get me a Kilowatt Pro checkout link for my email: <your email>

Reserve a founding spot: POST /api/checkout

curl -s https://kilowatt.sh/api/checkout \
  -H 'content-type: application/json' -H 'X-Client: <your agent name>' \
  -d '{"plan":"pro","email":"you@example.com","agent":true}'
# => {"ok":true,"checkout_url":"https://checkout.stripe.com/c/pay/cs_live_...","plan":"pro","price_usd_month":39,...}

plan: pro ($39/month) or lite ($19/month). Default pro.
email (optional) prefills Checkout. Only use an email your human gave you.
Give checkout_url to your human. It expires in 30 minutes; request a new one if needed.
Never pay, enter card details, or complete Checkout without your human's explicit approval.
After payment the spot is reserved automatically; your human lands on https://kilowatt.sh/welcome with their spot number and a billing-portal link. 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.

Errors:

Status	`error`	What to do
400	`plan must be pro or lite` / email error	Fix the input
409	`founding_full`	All 100 spots are taken. Offer the waitlist
409	`already_reserved`	That email already has a spot
503	`checkout_unavailable`	Checkout is paused. Offer the waitlist

Spots left: GET https://kilowatt.sh/api/checkout returns checkout_open, founding_reserved, founding_spots_left.

Not ready to pay: POST /api/waitlist

curl -s https://kilowatt.sh/api/waitlist \
  -H 'content-type: application/json' -H 'X-Client: <your agent name>' \
  -d '{"email":"you@example.com","use_case":"coding agent","agent":true,"plan":"pro"}'

Idempotent: the same email returns the same position. 201 new, 200 already registered. Relay message.
Set "agent": true and send X-Client: <your agent name>. Optional ref (max 100 characters) is stored for attribution.
On HTTP 429, wait retry_after_seconds (also the Retry-After header). Don't loop.
The waitlist is free and doesn't reserve a founding spot.

MCP

Kilowatt runs a Model Context Protocol server (streamable HTTP, JSON responses, no auth) at https://kilowatt.sh/mcp.

claude mcp add --transport http kilowatt https://kilowatt.sh/mcp

Tools: create_checkout, join_waitlist, waitlist_status, get_plans, get_models. Details: MCP.

Discovery files

llms.txt and llms-full.txt
skill.md (agent skill; install with mkdir -p ~/.claude/skills/kilowatt && curl -fsSL https://kilowatt.sh/skill.md -o ~/.claude/skills/kilowatt/SKILL.md)
openapi.json
/.well-known/agent.json (A2A agent card), /.well-known/mcp/server-card.json, /.well-known/ai-plugin.json, /.well-known/agent-skills/index.json
Every page has a markdown copy: add .md to the path (/index.md for the home page) or send Accept: text/markdown.

Agents: /agents.md is this page in markdown, or request it with Accept: text/markdown.