cygn

Official Python SDK for the Cygn Enterprise API — deepfake detection, C2PA content signing, sonic watermarking, and voice ID.

Zero dependencies. Python 3.9+.

Installation

pip install cygn

Quick Start

from cygn import CygnEnterprise
import base64

cygn = CygnEnterprise(license_key="cygn_ent_xxxx")

# Camera capture: sign a photo at the moment it's taken
with open("photo.jpg", "rb") as f:
    image_b64 = base64.b64encode(f.read()).decode()

result = cygn.sign_image(
    image=image_b64,
    provenance="captured",
    app_name="MyDeliveryApp Camera",
)

# result.signed_image is a base64-encoded C2PA-signed JPEG

Authentication

Two methods:

# License Key (simpler)
cygn = CygnEnterprise(license_key="cygn_ent_xxxx")

# Cygn-Token (Ed25519 cryptographic identity)
cygn = CygnEnterprise(cygn_token="eyJhbGci...")

API Methods

Deepfake Detection

result = cygn.detect_deepfake(content=image_b64, media_type="image")
# result.score, result.verdict, result.signals

See your enterprise dashboard for current pricing.

C2PA Content Signing

result = cygn.sign_image(
    image=image_b64,
    provenance="captured",      # "captured" or "cygned"
    app_name="Zomato Camera",   # your app branding
    did="did:key:z6Mkv...",     # optional signer DID
)
# result.signed_image (base64), result.signed_at

See your enterprise dashboard for current pricing.

Provenance Bundle (Deepfake Detection + Signing)

result = cygn.provenance_bundle(
    image=image_b64,
    provenance="captured",
    app_name="Zomato Rider",
    did="did:key:z6Mkv...",
    display_name="Rider #4521",
)
# result.signed_image, result.deepfake.verdict, result.deepfake.score

See your enterprise dashboard for current pricing.

Sonic Watermarking

See your enterprise dashboard for current pricing.

Voice ID

See your enterprise dashboard for current pricing.

Usage & Balance

usage = cygn.get_usage()
# usage.balance (paise), usage.total_spent, usage.current_month

balance = cygn.get_balance()  # returns balance in paise

Error Handling

from cygn import CygnEnterprise, CygnAPIError

try:
    result = cygn.sign_image(image=image_b64)
except CygnAPIError as e:
    print(e.status)    # HTTP status code (e.g. 402)
    print(e.code)      # VALIDATION_ERROR, UNAUTHORIZED, INSUFFICIENT_BALANCE, etc.
    print(e.balance)   # remaining balance (if available)
    print(e.cost)      # operation cost (if available)

Use Case: Food Delivery Camera App

# Rider captures photo of delivered food
result = cygn.provenance_bundle(
    image=camera_capture_b64,
    provenance="captured",
    app_name="Zomato Rider",
    did="did:key:z6Mkv...",
    display_name="Rider #4521",
)

if result.deepfake.verdict == "likely_authentic":
    save_signed_photo(result.signed_image)

License

Apache-2.0