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https://api.guttertokens.com

Authenticate with Authorization: Bearer sk-…. Keys are created in the dashboard and shown once.

Create an account to get a key. Credits are prepaid; there is no subscription.

Billed on tokens delivered. A request that fails upstream is not charged. Prompt caching is billed separately: writing a prefix to cache costs 25% more than the input price above, and each read after that costs 90% less.

from openai import OpenAI

client = OpenAI(
    base_url="https://api.guttertokens.com/v1",
    api_key="sk-...",
)

response = client.chat.completions.create(
    model="claude-opus-4-8",
    messages=[{"role": "user", "content": "Hello"}],
)
print(response.choices[0].message.content)

from anthropic import Anthropic

client = Anthropic(
    base_url="https://api.guttertokens.com",
    api_key="sk-...",
)

message = client.messages.create(
    model="claude-opus-4-8",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello"}],
)
print(message.content[0].text)

export ANTHROPIC_BASE_URL=https://api.guttertokens.com
export ANTHROPIC_AUTH_TOKEN=sk-...

claude

Set stream: true. Responses are server-sent events and are not buffered — tokens arrive as they are produced.

curl https://api.guttertokens.com/v1/chat/completions \
  -H "Authorization: Bearer sk-..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-haiku-4-5-20251001",
    "messages": [{"role": "user", "content": "Count to ten"}],
    "stream": true
  }'

Errors use the standard shape, so an SDK can branch on error.type and error.code.

• Concurrency and request-rate limits apply per source address. They are set high enough for parallel agent workloads; a 429 means back off and retry.
• There is no ceiling on how long a single request may run. Long agentic turns are normal traffic.
• Spending is bounded by your prepaid balance, not by a rate limit.

• POST /v1/chat/completions — OpenAI Chat Completions, streaming and non-streaming.
• POST /v1/messages — Anthropic Messages, streaming and non-streaming.
• GET /v1/models — the models your key can reach.