aethis-sdk 0.3.1

Official Python SDK for the Aethis developer API — eligibility decisions and ruleset schemas

Aethis SDK for Python

Official Python SDK for the Aethis developer API — eligibility decisions, ruleset schemas, and stateful decision sessions.

Documentation: docs.aethis.ai · OpenAPI spec · agents via MCP: claude mcp add aethis -- npx -y aethis-mcp

Install

pip install aethis-sdk

Python 3.11+. Requires httpx and pydantic.

Quickstart

One-shot decision (sync)

from aethis_sdk import Aethis

with Aethis(api_key="YOUR_KEY") as client:
    response = client.decide(
        ruleset_id="eng_lang:20250912-ec5d7c23",
        field_values={
            "nationality": "French",
            "degree_awarded_in_uk": True,
        },
    )
    print(response.decision)  # "eligible" | "not_eligible" | "undetermined"

One-shot decision (async)

import asyncio
from aethis_sdk import AsyncAethis

async def main():
    async with AsyncAethis(api_key="YOUR_KEY") as client:
        response = await client.decide(
            ruleset_id="eng_lang:20250912-ec5d7c23",
            field_values={"nationality": "French"},
        )
        print(response.decision)

asyncio.run(main())

Stateful decision session

Accumulate answers locally and query the API only when needed. Cached until an answer changes. The session does not manage the client — the caller keeps the Aethis context open for the session's lifetime.

from aethis_sdk import Aethis, SyncDecisionSession

with Aethis(api_key="YOUR_KEY") as client:
    schema = client.get_schema("eng_lang:20250912-ec5d7c23")
    session = SyncDecisionSession("eng_lang:20250912-ec5d7c23", client, schema)
    session.answer("nationality", "French")
    while (nq := session.next_question()) is not None:
        answer = input(f"{nq.question} ")
        session.answer(nq.field_id, answer)
    print("Eligible:", session.is_eligible())

The async equivalent is DecisionSession — same surface, await on the HTTP methods (decide, is_eligible, next_question, status).

What's included

Import	Purpose
Aethis, AsyncAethis	HTTP clients for /decide, /rulesets/{id}/schema, /me, /rulesets/{id}/explain, /rulesets/{id}/source
SyncDecisionSession, DecisionSession	Stateful adapters over the stateless /decide endpoint
DecideResponse, SchemaResponse, SchemaField, NextQuestion, SectionResult	Pydantic response models
AethisError, AethisAPIError, AethisUnavailable, AethisTimeout	Exception hierarchy

Configuration

• api_key — required. Provisioned via aethis.ai.
• base_url — defaults to https://api.aethis.ai. HTTP is only permitted for localhost / 127.0.0.1 or when passing a test transport.
• timeout — per-request, seconds. Defaults to 5.
• iam_token — optional bearer token for Cloud Run service-to-service auth.

Status

Pre-1.0. The decision surface (/decide, /schema) is stable; authoring endpoints (projects, rulesets, publishing) are not yet exposed here — use the Aethis CLI for those.

Links

• Issue tracker: https://github.com/Aethis-ai/aethis-sdk-python/issues
• API docs: https://aethis.ai