attestic (Python)

Thin client for the Attestic AI gateway.

Attestic is drop-in OpenAI- and Anthropic-compatible, so you can also just point the OpenAI or Anthropic SDK at https://api.attestic.ai. This package adds two conveniences: a pre-configured client, and offline verification of the signed provenance receipt every call produces.

pip install attestic[all]      # or attestic[openai] / attestic[anthropic]

from attestic import Attestic

at = Attestic(api_key="atk_...")   # mint a key at attestic.ai/api-keys

# OpenAI-style
r = at.openai.chat.completions.create(
    model="gpt-5.5",
    messages=[{"role": "user", "content": "Explain provenance in one sentence."}],
)
print(r.choices[0].message.content)

# Anthropic / Claude-style (same key, same gateway)
m = at.anthropic.messages.create(
    model="claude-fable-5", max_tokens=256,
    messages=[{"role": "user", "content": "hi"}],
)

# Verify a call's receipt OFFLINE — no trust in Attestic required
receipt_id = "..."                 # from the x-attestic-receipt-id response header
assert at.verify(receipt_id)       # checks Ed25519 signature + Merkle inclusion

Models route by id across OpenAI, Anthropic, Google, and NVIDIA open-weight — gpt-5.5, claude-fable-5, gemini-3.1-pro-preview, meta/llama-3.3-70b-instruct, …

Without this SDK

Nothing special required:

from openai import OpenAI
client = OpenAI(base_url="https://api.attestic.ai/v1", api_key="atk_...")

from anthropic import Anthropic
client = Anthropic(base_url="https://api.attestic.ai", api_key="atk_...")