liyaengine

Official Python client for the Liya Engine public API.

Status: early access. This SDK currently covers Collections, Agents, Workflows, and Evaluations. More resources (Domains, Run, Guardrail Policies) ship incrementally — see Roadmap.

Install

pip install liyaengine

Quickstart

from liyaengine import LiyaEngine

client = LiyaEngine(api_key="liya_...")

collection = client.collections.create(
    slug="contracts",
    label="Contracts",
    domain_keys=["legal-ops"],
)

collections = client.collections.list()

Or as a context manager (closes the underlying HTTP connection pool automatically):

with LiyaEngine(api_key="liya_...") as client:
    collections = client.collections.list()

Get an API key from your Liya Engine dashboard under Settings → API Keys.

Agents

agent = client.agents.create(
    agent_key="support-triage",
    name="Support Triage",
    goal="Triage incoming support tickets and route them to the right team.",
)

# Agents are created in draft status — deploy to activate for execution.
client.agents.deploy(agent.agent_key)

result = client.agents.run(agent.agent_key, input={"message": "My order hasn't arrived yet."})

history = client.agents.list_runs(agent.agent_key)

Workflows

workflow = client.workflows.create(
    name="Lead Intake",
    steps=[{"step_type": "trigger", "config": {"trigger_subtype": "webhook"}}],
)

# Workflows are created in draft status — deploy to publish and make them
# callable. Deploying a webhook-triggered workflow for the first time mints
# its webhook secret; capture it immediately, it is never returned again.
deployed = client.workflows.deploy(workflow.workflow_key)
webhook_url, webhook_secret = deployed["webhook_url"], deployed["webhook_secret"]

# Roll the secret with a grace window so in-flight senders don't break.
client.workflows.rotate_webhook_secret(workflow.workflow_key, grace_period_seconds=300)

# Flip a deployed workflow on/off without touching its definition.
client.workflows.toggle(workflow.workflow_key)

result = client.workflows.run(workflow.workflow_key, input={"email": "ada@example.com"})

history = client.workflows.list_runs(workflow.workflow_key)

deploy() and rotate_webhook_secret() return the plaintext webhook secret exactly once. Store it immediately — subsequent reads (get, list) only ever expose trigger_config["has_secret"].

Evaluations

A Suite binds a Dataset to one specific intent; suites.run() calls that intent for real and scores what it produces. runs.submit()/evaluations.score() score a response you already generated yourself — no intent execution involved.

dataset = client.evaluations.datasets.create(
    name="Support Replies",
    cases=[{"input": {"message": "Where is my order?"}}],
)

suite = client.evaluations.suites.create(
    name="Order Status Suite",
    domain_key="support",
    intent_key="order-status",
    dataset_id=dataset.id,
)

# Runs are always async — poll for status/results.
run = client.evaluations.suites.run(suite.id)
result = client.evaluations.runs.get(run.id)

# A failed run can be resumed — already-scored cases are skipped.
client.evaluations.runs.resume(run.id)

# Score a response you already generated, no dataset/suite required.
scored = client.evaluations.score(
    input={"message": "Where is my order?"},
    output="Your order shipped yesterday and should arrive by Friday.",
)

custom_scorer_webhook_secret on a Suite is write-only — it's never returned; only a custom_scorer_webhook_secret_set boolean comes back on reads.

Error handling

Every failed request raises LiyaEngineAPIError, carrying the API's code, message, and HTTP status:

from liyaengine import LiyaEngineAPIError

try:
    client.collections.create(slug="contracts", label="Contracts", domain_keys=["legal-ops"])
except LiyaEngineAPIError as err:
    if err.code == "SLUG_CONFLICT":
        # handle the conflict
        pass
    raise

Network failures and timeouts raise LiyaEngineNetworkError instead. Requests are retried automatically on 429/5xx responses and transient network errors (2 retries by default).

Configuration

LiyaEngine(
    api_key="liya_...",
    base_url="https://api.liyaengine.ai",  # override for local/staging
    timeout_s=30.0,
    max_retries=2,
)

Roadmap

• Collections
• Agents (full CRUD, deploy, run, run/session history)
• Workflows (full CRUD, toggle, deploy, webhook secret rotate, run, run history)
• Evaluations (Datasets/Cases/Suites/Runs/Reviews CRUD, suite execution, cancel/resume, statistical + pairwise compare, standalone scoring)
• Domains (custom domain + intent CRUD)
• Run / Run (streaming)
• Guardrail Policies
• Async client

Full docs: https://liyaengine.ai/docs/sdks/python

Development

python3 -m venv .venv && source .venv/bin/activate
pip install -e ".[dev]"
mypy src
pytest

License

MIT