isa-sdk 1.0.1

Unified Python SDK for ISA APIs (zyins, rapidsign, proxy).

sah-sdk

Python SDK for the Best Plan Pro API — powered by the ZyINS engine. Mirrors the canonical TypeScript SDK at packages/zyins/js/ with Python-idiomatic naming (snake_case) and pydantic v2 models.

Install

pip install sah-sdk

GitHub Packages fallback. Until sah-sdk is fully published on PyPI, install directly from the source repository:

pip install "git+https://github.com/Software-Automation-Holdings-LLC/sdk.git@sdk/v0.5.0#subdirectory=packages/python"

The wire surface is identical either way; only the install command changes.

Quick start

import os
from sah_sdk.zyins import Isa, Applicant, Coverage, PrequalifyInput, Sex

# Reads ISA_TOKEN from the environment — no explicit token needed.
isa = Isa.with_bearer()

result = isa.zyins.prequalify(PrequalifyInput(
    applicant=Applicant(
        dob="1962-04-18",
        sex=Sex.MALE,
        height_inches=70,
        weight_pounds=195,
        state="NC",
        nicotine_use="none",
    ),
    coverage=Coverage.face_value(100_000),
    products="colonial-penn.final-expense",
))

for plan in result.data.plans:
    print(plan.brand, plan.tier, plan.monthly_premium)

Isa.with_bearer() reads ISA_TOKEN from the environment. Authorization: Bearer <token>, Idempotency-Key, and the date-pinned Version header are set automatically.

First call in <15 lines

from sah_sdk.zyins import Isa, Coverage

isa = Isa.with_keycode(
    keycode="SDV-HWH-WDD",
    email="[e-mail]",
)
result = isa.zyins.prequalify_v2(
    applicant={"dob": "1962-04-18", "sex": "male", "state": "NC"},
    coverage=Coverage.face_value(25_000),
    products="colonial-penn.final-expense",
)
print(result.data.plans[0].monthly_premium)

Per-surface API versions

The ISA API is a federation of independently versioned surfaces. Every SDK release exports a frozen BUNDLED_API_VERSIONS mapping recording which /vN each surface targets:

from sah_sdk.zyins import BUNDLED_API_VERSIONS

print(BUNDLED_API_VERSIONS)
# {
#   "prequalify": "v2",
#   "quote":      "v2",
#   "datasets":   "v2",
#   "reference":  "v2",
#   "sessions":   "v1",
#   "branding":   "v1",
#   "cases":      "v1",
# }

Pin individual surfaces with a per-surface api_version map. There is no default key and no string shorthand — resolution is api_version.get(surface, BUNDLED_API_VERSIONS[surface]):

isa = await Isa.with_keycode(
    keycode="SDV-HWH-WDD",
    email="[e-mail]",
    api_version={"quote": "v2"},   # pin only quote; everything else bundled
)

The release that retargets prequalify / quote / datasets / reference to v3 will bump those entries. See SDK syntax proposal §2.7.

Reference data — .match()

The unversioned isa.zyins.reference namespace canonicalizes free-text medication and condition input. Unknown text never rejects — it returns a structured envelope so the final canonicalization fires server-side at /vN/prequalify:

ds = await isa.zyins.datasets.get(include=["conditions", "medications"])

insulin = isa.zyins.medications.match("insulin")
print(insulin.id, insulin.name, insulin.is_known)
# med_01KSR2WVAGC05ZGR6FA4QYEB12  INSULIN  True

# Symmetric traversal — what conditions is insulin used for?
used_for = insulin.conditions(isa.zyins.reference.Sort.MOST_COMMON_FIRST)
# frequency-ordered list; cond_01KSR2WVAGC05ZGR6FA4QYEA8X first

novel = isa.zyins.medications.match("NewExperimental XR 2026")
# → {"is_known": False, "input_text": "NewExperimental XR 2026", ...}

Sort.MOST_COMMON_FIRST and Sort.ALPHABETICAL are the two supported orderings.

Case storage — bring your own

isa.zyins.cases.* routes through a CaseStorage adapter. The default is the zero-knowledge store — ISA's servers only hold ciphertext and an opaque ID. To plug a carrier-controlled store, pass your adapter at construction:

isa = await Isa.with_keycode(
    keycode=..., email=...,
    case_storage=CarrierCaseStorage(),   # optional; default = ZeroKnowledgeCaseStorage
)

See cases guide for the full bring-your-own pattern.

Auth deviation from the TS SDK

The TypeScript SDK in this monorepo still carries the pre-#286 HMAC device signing surface (AuthContext with licenseKey + orderId + email + deviceId). The Python SDK is built against the post-#286 wire contract: a single bearer token (isa_live_* / isa_test_*) is the entire auth surface. This is the intentional simplification called out in the platform's platform_v1_architecture notes.

Surface

TypeScript	Python
client.prequalify(req)	client.prequalify.run(input)
client.license.activate/deactivate/check	client.license.* (mirrored)
client.case.email(req)	client.case.email(input)
(new)	client.quote.run(input)
(new)	client.datasets.list/get
(new)	client.reference_data.get(kind)
(new)	client.usage.summary(period)

Errors mirror the TS hierarchy: ISAError (alias ZyInsError, also exported as IsaApiError) → LicenseError, PrequalifyError, ValidationError, RateLimitError, AuthError, IsaIdempotencyConflictError.

Isa factory client

Per SDK_DESIGN.md §3, the recommended entry point is the Isa class with three named factories:

from sah_sdk.zyins import Isa

# Reads ISA_TOKEN from the environment.
isa = Isa.with_bearer()
env = isa.zyins.prequalify(req)
print(env.data, env.request_id, env.idempotency_key, env.retry_attempts)

# Or pass the token explicitly.
isa = Isa.with_bearer("isa_live_…")

# License factory — reads ISA_LICENSE_KEYCODE / ISA_LICENSE_EMAIL.
isa = Isa.with_license()

# Session factory — reads ISA_SESSION_ID / ISA_SESSION_SECRET.
isa = Isa.with_session()

Each factory raises IsaConfigError with a clear, actionable message if the required env vars are unset and no explicit arguments are supplied.

Raw HTTP access

Every method has a .with_raw_response() variant returning both the parsed envelope and the underlying HTTP metadata:

env, raw = isa.zyins.prequalify.with_raw_response(req)
raw.status     # int
raw.url        # str
raw.headers    # read-only mapping

Debug logging

Set ISA_LOG=debug to dump every request and response to stderr — never stdout, so parent processes piping the consumer's JSON output stay clean. Credential headers (Authorization, X-Device-Signature, X-Session-Signature) and PII body fields (email, dob, ssn, phone) are redacted automatically.

Idempotency conflicts

When the same Idempotency-Key is replayed with a different body the server returns 409 idempotency_conflict. The SDK raises IsaIdempotencyConflictError with .key and .first_seen_at so the caller can audit the queued-write bug class:

from sah_sdk.zyins import IsaIdempotencyConflictError

try:
    isa.zyins.prequalify(req, idempotency_key="case-42")
except IsaIdempotencyConflictError as e:
    log.error("key %s first seen at %s", e.key, e.first_seen_at)

Concurrency

The Isa client is safe for use with asyncio.gather and concurrent.futures — every request mints a fresh request-id and idempotency key, and shared client state (auth, base URL, debug logger) is read-only after construction. Reuse a single Isa instance across all concurrent requests; the underlying HTTP transport pools connections for you.

import asyncio
from sah_sdk.zyins import Isa

isa = Isa.with_bearer()

async def one(req):
    return isa.zyins.prequalify(req)

results = await asyncio.gather(*(one(r) for r in batch))
# Each result.request_id is distinct.

Development

hatch run test         # pytest
hatch run lint         # ruff + mypy --strict
hatch build            # wheel + sdist

Live-integration tests run only when ZYINS_TEST_TOKEN is set:

ZYINS_TEST_TOKEN=isa_test_... hatch run test -- -m integration

Licenses and Ready

The Python SDK exposes the public BPP license-lifecycle surface and the platform readiness probe on every ZyInsClient:

from sah_sdk.zyins import LicenseCheckInput, ZyInsClient

client = ZyInsClient("isa_live_...")

result = client.license.check(
    LicenseCheckInput(
        email="[e-mail]",
        keycode="ABC-123-XYZ",
        device_id="dev_01HZK2N5GQR9T8X4B6FJW3Y1AS",
    )
)
# result.status: "valid" | "invalid" | "inactive"

ready = client.health.get_readiness()
# ready.ready: True on every required probe = "serving"

The pre-existing client.license (singular) sub-client targets the authenticated /v1/license/* self-status endpoints and is untouched.