Skip to content
monac
monac
Log in

Anthropic API key.Pay up to 50% less.

Our API · api.monac.cc/v1

Get your API keySee the prices

From $10 · Credit never expires · No subscription

  1. 20%$10+
  2. 30%$100+
  3. 40%$500+
  4. 50%$1,000+

Two lines change. Nothing else does.

Point your existing Anthropic SDK at api.monac.cc/v1. Model IDs, streaming, tool use: identical.

Two lines change. Everything else stays yours.
client.py
from anthropic import Anthropicclient = Anthropic(Changed line     api_key="cca_••••••••••••••••",Removed line     base_url="<your current base URL>",Changed line     base_url="https://api.monac.cc",)reply = client.messages.create(    model="claude-opus-5", max_tokens=1024,    messages=[{"role": "user", "content": "Hello from monac"}])
response.json
{
  "id": "msg_01MoNaCc7Kd3Q",
  "model": "claude-opus-5",
  "content": [{ "type": "text", "text": "Hello from monac." }],
  "usage": { "input_tokens": 12, "output_tokens": 8 }
}
12 in · 8 outCharged $0.00026 · $5.00 / $25.00 per 1M

Pick your credit. Keep the difference.

4 presets, or any amount from $10 to $2,000.

30% OFF

$70$100 in credit for $70

$0.70 per $1 of credit
Pay $70

40% OFF

MOST POPULAR

$300$500 in credit for $300

$0.60 per $1 of credit
Pay $300

50% OFF

BEST VALUE

$500$1,000 in credit for $500

$0.50 per $1 of credit
Pay $500

50% OFF

SAVE 50%

$1,000$2,000 in credit for $1,000

$0.50 per $1 of credit
Pay $1,000

Your band's discount is applied automatically: 20% to 50%, by volume. Credit never expires.

Card payment, and an invoice on every top-up.

You pay

$500Your band: 50% off
Buy $1,000 for $500

Any amount from $10 to $2,000. Your band is set by this purchase, not your lifetime total.

Buy $1,000 for $500

Every band, to the cent.

The band is set by the credit value of a single purchase. The last threshold at or under it wins.

Volume bands: credit value, discount, price and unit rate for each band.
Credit valueDiscountYou payPer $1 of credit
$10+20.0%$8.00+$0.80 per $1 of credit
$0.80
$100+30.0%$70.00+$0.70 per $1 of credit
$0.70
$500+40.0%$300.00+$0.60 per $1 of credit
$0.60
$1,000+50.0%$500.00+$0.50 per $1 of credit
$0.50

One base URL. Everything else stays yours.

  1. POST /v1/messages

    The Anthropic SDK you already have, pointed at monac.

  2. api.monac.cc/v1

    We authenticate the key and reserve credit against the request.

  3. 200 · text/event-stream

    The response streams back in the Messages API shape, token counts included.

Endpoint
https://api.monac.cc/v1
Protocols
Anthropic Messages API and an OpenAI-compatible chat completions endpoint
Models
The Claude model IDs your code already sends
Auth
Bearer token in the Authorization header
Streaming
Server-sent events, usage in the final event
Credit expiry
Never expires
Currency
USD
Payment
Card

Before you buy.

The questions people email us first.

Is this the Anthropic API?No, it's ours

No. monac runs its own API at https://api.monac.cc/v1, and it implements the Anthropic Messages API. That means the Anthropic SDK, your model IDs, your streaming handler and your tool schemas work against it unchanged. You swap the base URL and the key, and nothing else in your code moves. monac is an independent company and is not affiliated with Anthropic.

Endpoint
https://api.monac.cc/v1
What exactly changes in my code?api_key · base_url

Two lines. Model IDs, tool schemas, streaming and the response shape are identical, so every handler you have written keeps working.

Base URL
https://api.monac.cc/v1
How does the volume discount work?20% – 50%

The discount is set by the credit value of a single purchase and applied automatically at checkout on any amount you choose. It is a property of the credit you bought, not of the tokens you spend.

$10+
20.0%
$100+
30.0%
$500+
40.0%
$1,000+
50.0%
How can it be up to 50% cheaper?Prepaid volume

You pay up front, and we price the commitment. The bigger the top-up the deeper the discount. That is the whole mechanism. The rate card is the same for everybody.

Maximum discount
50.0%
Which models can I use?Opus · Sonnet · Haiku

Claude Opus 5, Claude Sonnet 5 and Claude Haiku 4.5, plus the 4.5 generation of Opus and Sonnet. Send the model ID you already send; there is no prefix to add and no find-and-replace. Call /v1/models for the live list.

Does the credit expire?Never

Never. There is no subscription and no monthly minimum: credit you bought stays on your account until you spend it.

Minimum purchase
$10.00
Maximum purchase
$2,000.00
Do I need an account?Yes

Yes. Sign up with your email and a password. Your key, your usage and your invoices live there, and activation is instant.

Pay $1,000. Spend $2,000.

Your first top-up prices in seconds. No subscription, no expiry.

Get your API keySee the code
You pay50% off

You spend

Credit is a USD balance. It never expires, it is debited per request at the rates published on this page, and your band discount is applied to the purchase, not to the rate. Rates on this page were effective 30 August 2026.