Billing

Prepaid credits, paid by card. Every request debits the balance. Balance and spend are readable from your key.

Add credits

POST /mserve/v1/billing/checkout returns a checkout page for a one-time top-up between $5 and $1,000. Open the URL. The credit lands when the payment clears.

curl https://api.mserve.ai/mserve/v1/billing/checkout \
  -H "Authorization: Bearer $MSERVE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"amount": 25}'

Response

{ "url": "https://checkout.stripe.com/c/pay/cs_…", "session_id": "cs_…", "amount": 25 }

POST /mserve/v1/billing/card returns a page to save a card for later top-ups.

How a request is billed

Before the request

Balance above zero and key spend under its limit. Otherwise 402, and nothing runs.

After the response

usage is priced and debited. A failed request bills nothing. A stream you disconnect from is billed for the prompt and the output already produced.

Units

Product	Unit
Text, embeddings, batch	Input and output tokens. Reasoning tokens are output tokens.
Text to speech	Input characters.
Speech to text, translation	Audio minutes.
Voice Changer	Audio seconds.
Realtime voice	Audio minutes in, tokens, characters out.

Read your balance

GET /mserve/v1/key returns balance, usage_daily, and usage_monthly. See Authentication.

Prices

Model	Model id	Input per 1M tokens	Output per 1M tokens
Qwen3.8 27B	`qwen3.8-27b`	$0.30	$2.50

Full tables on Pricing.