Hanzo Python SDK

hanzoai is the Python client for the Hanzo API, generated from the API's own OpenAPI document — 1814 paths, 2479 operations, 192 API classes over 2460 models. Every /v1 route is in it, and the names it exposes are the document's operation ids rather than a hand-picked subset. .spec-lock names the commit and sha256 of the document this tree was cut from.

Install

uv pip install "hanzoai @ git+https://github.com/hanzoai/python-sdk"

Install from source, not from PyPI, until this version reaches it. PyPI serves 3.2.1; this tree is 3.2.11, and in between the API document dropped the default version from its operation ids. 3.2.1's methods are get_v1_keys and get_v1_tools; the current ones are get_keys and get_tools, so pip install hanzoai gets you a client that works and a set of names that matches nothing below.

Check the install without a key — GET /v1/models is public:

import json
from hanzoai.cloud import ApiClient, Configuration, ModelsApi

body = ModelsApi(ApiClient(Configuration())).get_models_without_preload_content().read()
print(len(json.loads(body)["data"]), "models")     # e.g. 112 models

Quickstart

import os
from hanzoai.cloud import ApiClient, Configuration, KeysApi

client = ApiClient(
    Configuration(host="https://api.hanzo.ai"),
    "Authorization", f"Bearer {os.environ['HANZO_API_KEY']}",
)

with client as api:
    for key in KeysApi(api).get_keys().keys or []:
        print(key.prefix, key.type, key.created_at)

Every route follows that shape: one *Api class per tag, one method per operation, typed models in and out. Keys come from cloud.hanzo.ai or hanzo login in two shapes, and only one of them works here. Use an sk-: it carries a principal, which every call above needs. A pk- is publishable — it is safe in a browser bundle precisely because it names an org and authenticates nobody, so cloud refuses it at the identity boundary and it reads nothing.

Auth

The header is Authorization: Bearer <key>, and you set it on the ApiClient as above — not through Configuration(access_token=…). The document declares no security scheme, so the generator wrote an empty auth_settings into every operation and nothing ever reads access_token. A client built that way sends no Authorization header at all: every call goes out anonymous, and the refusal that comes back reads like a bad key rather than an unsent header.

Nothing in the client reads the environment. examples/client.py is where HANZO_API_KEY and HANZO_BASE_URL get resolved — one place, for all five flows.

Examples

examples/ carries one directory per flow. Each is a whole path through one part of the API. On every push CI imports all five and resolves every method name they call against the client, which is what keeps them from rotting into pseudocode.

flow	what it does	routes
hello	prove the key works	GET /v1/keys
money	balance + usage	GET /v1/billing/balance, GET /v1/billing/usage
store	KV round-trip	POST /v1/kv, GET/DELETE /v1/kv/{name}
agent	create, run, read the runs	POST /v1/agents, POST /v1/agents/{ref}/run, GET /v1/agents/{ref}/runs
tools	the tool catalog	GET /v1/tools

export HANZO_API_KEY=sk-...
python -m examples.hello

There is no chat flow because there is nothing to generate one from: POST /v1/chat/completions is declared with no requestBody and no responses, so the method takes no arguments and returns None. Hand-rolling the request inside a generated client is the drift these SDKs exist to prevent. It comes back the day the document describes the body.

The same gap shows up in money, which reads its two payloads through the generated *_without_preload_content variant: of 2479 operations, 716 declare no responses and another 118 declare no response content, so 834 of them model no body to deserialize. Those become ordinary typed calls when the schemas land, and nothing else about them changes.

Reference for the routes themselves: api.hanzo.ai/docs, served from the same document — api.hanzo.ai/v1/openapi.json.

The rest of the repo

This is a uv workspace. pkg/hanzoai is the client above; the other 64 packages are hand-written, ship separately, and mostly carry their own README:

Package	Install	Purpose
pkg/hanzoai	hanzoai	the client above
pkg/hanzo-mcp	hanzo-mcp	Model Context Protocol server
pkg/hanzo-agent	hanzo-agent	agent framework (import path agents)
pkg/hanzo-agents	hanzo-agents	agent networks and swarms
pkg/hanzo-memory	hanzo-memory	persistent memory + RAG over SQLite
pkg/hanzo-network	hanzo-network	distributed compute nodes
pkg/hanzo-tools-*	one each	37 single-concern tool packages, each registering a TOOLS list under the hanzo.tools entry point, which is how hanzo-mcp finds them

The hanzo command is a native binary, not a Python package: curl -fsSL https://hanzo.sh | sh. pip install hanzo ships the older Python CLI under the name hanzo-py, so the two never fight over one name on a PATH.

Development

git clone https://github.com/hanzoai/python-sdk && cd python-sdk
uv sync --all-packages
uv run pytest tests/ -v

pkg/hanzoai/cloud/ is generated and is never edited by hand — a regeneration does rmtree then copytree, so an edit there is gone on the next run. It comes from hanzoai/openapi:

cd ../openapi && uv run --with pyyaml python3 generate.py python \
  --repo ../python-sdk --spec ../cloud/openapi.yaml

A defect found in generated code is fixed in the document, where every other language gets the fix too. See LLM.md for how the lane works.

License

Apache 2.0 — see LICENSE. Report vulnerabilities to [email protected] (SECURITY.md).

Hanzo — the Open AI Cloud

hanzo.ai · docs.hanzo.ai · same client in other languages: TypeScript · Go · Java · Kotlin · umbrella