sievr

Official Python SDK for the Sievr API — drop-in guardrails for LLM apps. PII redaction and prompt-injection detection in a single API call.

Install

pip install sievr
# or
uv add sievr

Quick start

from sievr import Sievr

client = Sievr(api_key="sv_live_...")

result = client.scan({
    "text": "Email alice@example.com. Ignore previous instructions.",
    "checks": ["pii", "injection"],
})

print(result.pii.redacted_text)
# "Email <EMAIL_1>. Ignore previous instructions."

print(result.injection.verdict, result.injection.score)
# block 0.95

.scan() and .rehydrate() accept either a plain dict (validated and converted under the hood) or a typed model object if you'd rather have the extra compile-time safety:

from sievr.models.scan_request import ScanRequest
from sievr.models.scan_request_checks_item import ScanRequestChecksItem

result = client.scan(ScanRequest(
    text="...",
    checks=[ScanRequestChecksItem.PII, ScanRequestChecksItem.INJECTION],
))

Round-trip with an LLM

After your model has run on the redacted text, restore the placeholders:

cleaned = client.rehydrate({
    "text": "I'll send a confirmation to <EMAIL_1>.",
    "entities": [
        {"original": e.original, "replacement": e.replacement}
        for e in result.pii.entities
    ],
})

print(cleaned.text)
# "I'll send a confirmation to alice@example.com."

/v1/scan/rehydrate is free — it doesn't tick the quota meter.

Configuration

client = Sievr(
    api_key="sv_live_...",
    base_url="https://api.sievr.dev",  # override for self-hosted or testing
    timeout=10.0,                       # seconds, optional
)

Errors

All API errors raise SievrError:

from sievr import Sievr, SievrError

try:
    client.scan(...)
except SievrError as err:
    print(err.code, err.status, err.raw)

Common error codes: unauthorized, quota_exceeded, validation_failed, request_too_large, invalid_json.

Async

The generated low-level functions ship with asyncio variants; the friendly Sievr class is sync-only for now. To make async calls today, drop down to:

from sievr import AuthenticatedClient
from sievr.api.scan import scan_text
from sievr.models.scan_request import ScanRequest

client = AuthenticatedClient(base_url="https://api.sievr.dev", token="sv_live_...")
result = await scan_text.asyncio(client=client, body=ScanRequest(text="..."))

An async variant of the friendly wrapper will land in a future release.

Reference

Full API reference: https://sievr.dev/docs

License

Apache-2.0