Quickstart

You need an account, credits, and a model with an available offer. These examples use claude-sonnet-5-5; copy a currently available ID from Marketplace if it is not listed for your key.

Create your account and keyCopy Anchor Link

Sign upCopy Anchor Link

Open unused.market, create your account, and sign in to the dashboard.

Add creditsCopy Anchor Link

Open Credits → Add credits. Choose Card and complete the checkout shown, or use USDC on Base when it is available. Wait until the payment is confirmed and your credit balance updates.

Create an API keyCopy Anchor Link

Open API Keys → Create new key. Enter a name such as local development, then select Create key. Copy the full value now: the dashboard shows it only once.

Set your environmentCopy Anchor Link

Replace sk-unused-... with the complete key copied from the dashboard. This string is an illustrative placeholder, not a valid key.

export UNUSED_API_KEY='sk-unused-...'
export UNUSED_BASE_URL='https://unused.market/v1'

The Use a key section of API Keys shows the exact base URL for your account. Examples here use https://unused.market/v1.

Send your first curl requestCopy Anchor Link

Save this file in your working directory:

{
  "model": "claude-sonnet-5-5",
  "messages": [{ "role": "user", "content": "Reply with one short greeting." }],
  "max_tokens": 64
}

curl --fail-with-body -i "$UNUSED_BASE_URL/chat/completions" \
  -H "Authorization: Bearer $UNUSED_API_KEY" \
  -H 'Content-Type: application/json' \
  --data-binary @request.json

A successful response is HTTP 200, with text under choices[0].message.content and token counts under usage. Keep the x-request-id response header. Open Analytics → Requests and search for that ID to confirm the model, cost, and status.

Make your first SDK callCopy Anchor Link

Run either example in the same terminal so it can read your environment variables.

python -m pip install openai

import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["UNUSED_API_KEY"],
    base_url=os.environ["UNUSED_BASE_URL"],
)
response = client.chat.completions.create(
    model="claude-sonnet-5-5",
    messages=[{"role": "user", "content": "Reply with one short greeting."}],
    max_tokens=64,
)
print(response.choices[0].message.content)

python hello.py

Both examples use the same unused.market key and model. The OpenAI SDK calls /v1/chat/completions; the Anthropic SDK appends /v1/messages to the host. Confirm your second request in Analytics → Requests, then choose your coding agent guide.

If the request failsCopy Anchor Link

See Troubleshooting for stream errors and request history.