expunct 0.1.1

Python SDK for the Expunct API

Expunct Python SDK

Privacy infrastructure for modern applications. Detect and redact PII, secrets, and sensitive data before it reaches AI, logs, or external APIs.

Installation

pip install expunct

Get your API key at expunct.ai — free tier includes 1M tokens/month, no credit card required.

Quick Start

from expunct import Expunct

client = Expunct(api_key="your-api-key")
redacted = client.sanitize_text("Alice Johnson's email is [e-mail] and SSN is 219-09-9999.")
print(redacted)
# Output: PERSON_1's email is EMAIL_ADDRESS_1 and SSN is US_SSN_1.

Usage

Text redaction (sync)

from expunct import Expunct

client = Expunct(api_key="your-api-key")

redacted = client.sanitize_text("Call Bob at 415-555-0100 or [e-mail]")
print(redacted)
# Call PERSON_1 at PHONE_NUMBER_1 or EMAIL_ADDRESS_1

Text redaction (async)

import asyncio
from expunct import AsyncExpunct

async def main():
    async with AsyncExpunct(api_key="your-api-key") as client:
        redacted = await client.sanitize_text("Call Bob at 415-555-0100 or [e-mail]")
        print(redacted)

asyncio.run(main())

File redaction (PDF, DOCX, images, audio)

from expunct import Expunct

client = Expunct(api_key="your-api-key")

# Pass a file path — returns redacted bytes
redacted_bytes = client.sanitize_file("contract.pdf")

# Save directly to disk
client.sanitize_file("contract.pdf", dest="contract_redacted.pdf")

# Pass a file-like object
with open("invoice.docx", "rb") as f:
    redacted_bytes = client.sanitize_file(f)

URI redaction (cloud storage)

Submit a file hosted in cloud storage (S3, GCS, Azure Blob) for redaction. The optional output_uri controls where the redacted file is written; if omitted the result is available via jobs.download().

from expunct import Expunct

client = Expunct(api_key="your-api-key")

job = client.sanitize_uri(
    "s3://my-bucket/reports/q1.pdf",
    output_uri="s3://my-bucket/reports/q1_redacted.pdf",
)
print(job.status)           # "completed"
print(job.findings_count)   # number of PII items found

Batch URI redaction

Enqueue multiple files in one call via the lower-level redact.batch() method, then poll the batch status:

from expunct import Expunct

client = Expunct(api_key="your-api-key")

batch = client.redact.batch(
    input_uris=[
        "s3://my-bucket/docs/file1.pdf",
        "s3://my-bucket/docs/file2.pdf",
    ],
    language="en",
)
print(batch.id, batch.total_jobs)

# Poll progress
status = client.batch.get(batch.id)
print(status.completed_jobs, status.failed_jobs)

Environment variable

Set EXPUNCT_API_KEY to avoid passing the key in code. The client reads it automatically when no api_key argument is provided — or you can read it yourself:

import os
from expunct import Expunct

client = Expunct(api_key=os.environ["EXPUNCT_API_KEY"])

Custom policy

Policies let you control which entity types are detected, the redaction method, confidence thresholds, and more. Create a policy once and reference it by ID on every job.

from expunct import Expunct, PolicyCreate

client = Expunct(api_key="your-api-key")

# Create a policy that only redacts PII and uses pseudonymization
policy = client.policies.create(PolicyCreate(
    name="pii-only-pseudonymize",
    pii_categories=["PII"],
    redaction_method="pseudonymization",
    confidence_threshold=0.7,
))

# Use the policy when uploading a file
job = client.redact.file("report.pdf", policy_id=policy.id)
completed = client.wait_for_job(job.id)
redacted_bytes = client.jobs.download(completed.id)

Inspecting findings

Every completed job exposes the PII entities that were found:

from expunct import Expunct

client = Expunct(api_key="your-api-key")

redacted_bytes = client.sanitize_file("form.pdf")

# Re-fetch job detail to inspect findings
jobs = client.jobs.list(page=1, page_size=1)
detail = client.jobs.get(jobs.jobs[0].id)

for finding in detail.findings:
    print(finding.entity_type, finding.confidence, finding.entity_value)

Error handling

from expunct import Expunct, AuthenticationError, RateLimitError, PollingTimeoutError

client = Expunct(api_key="your-api-key")

try:
    redacted = client.sanitize_text("Alice, SSN 219-09-9999")
except AuthenticationError:
    print("Invalid API key")
except RateLimitError as e:
    print(f"Rate limited — retry after {e.retry_after}s")
except PollingTimeoutError as e:
    print(f"Job {e.job_id} timed out after {e.timeout}s")

Context manager (sync)

from expunct import Expunct

with Expunct(api_key="your-api-key") as client:
    redacted = client.sanitize_text("John Smith, DOB 01/01/1980")

Client reference

Expunct / AsyncExpunct

Parameter	Type	Default	Description
api_key	str	required	Your Expunct API key
base_url	str	https://api.expunct.ai	Override for self-hosted or staging
tenant_id	str | None	None	Multi-tenant isolation header
timeout	float	30.0	Per-request timeout in seconds
max_retries	int	3	Automatic retries on transient errors

Convenience methods

Method	Returns	Description
sanitize_text(text, *, language)	str	Redact text in one call (upload → poll → decode)
sanitize_file(file, *, language, dest)	bytes	Upload a file, poll, return redacted bytes
sanitize_uri(input_uri, *, language, output_uri)	JobDetailResponse	Submit a URI, poll, return completed job
wait_for_job(job_id, *, interval, timeout)	JobDetailResponse	Poll a job until it completes or times out

Resource methods

client.redact

Method	Returns	Description
redact.file(file, *, config, language, policy_id)	JobResponse	Upload a file and enqueue a redaction job
redact.uri(input_uri, *, output_uri, config, language, metadata)	JobResponse	Submit a cloud URI for redaction
redact.batch(input_uris, *, config, language, metadata)	BatchJobResponse	Submit multiple URIs as a batch

client.jobs

Method	Returns	Description
jobs.list(*, page, page_size, status)	JobListResponse	List jobs with optional status filter
jobs.get(job_id)	JobDetailResponse	Get job detail including findings
jobs.report(job_id)	dict	Get full structured report for a job
jobs.download(job_id, *, dest)	bytes	Download redacted output; optionally save to dest

client.policies

Method	Returns	Description
policies.list()	list[PolicyResponse]	List all policies
policies.create(policy)	PolicyResponse	Create a new policy
policies.get(policy_id)	PolicyResponse	Fetch a policy by ID
policies.update(policy_id, policy)	PolicyResponse	Update a policy
policies.delete(policy_id)	None	Delete a policy

client.batch

Method	Returns	Description
batch.get(batch_id)	BatchJobResponse	Get status of a batch job

client.api_keys

Method	Returns	Description
api_keys.list()	list[ApiKeyResponse]	List API keys for your account
api_keys.create(key)	ApiKeyCreateResponse	Create a new API key
api_keys.revoke(key_id)	dict	Revoke an API key

client.audit

Method	Returns	Description
audit.list(*, page, page_size, event_type)	AuditListResponse	List audit log entries

Detected Entity Types

Expunct detects the following entity types by default (all categories enabled):

PII (Personally Identifiable Information)

Type	Example
PERSON	John Smith
EMAIL_ADDRESS	[e-mail]
PHONE_NUMBER	415-555-0100
LOCATION	San Francisco, CA
DATE_TIME	January 1, 1990
NRP	American, French (nationalities, religions, political groups)
ORGANIZATION	Acme Corp
URL	https://example.com
IP_ADDRESS	192.168.1.1
US_DRIVER_LICENSE	D1234567
US_PASSPORT	123456789
US_ITIN	900-70-0000

PCI (Payment Card Industry)

Type	Example
CREDIT_CARD	4111 1111 1111 1111
US_BANK_NUMBER	123456789
IBAN_CODE	GB29NWBK60161331926819
CRYPTO	1BoatSLRHtKNngkdXEeobR76b53LETtpyT
CVV	123
EXPIRY_DATE	12/26
CARD_HOLDER_NAME	J. Smith
PIN_NUMBER	1234
ACCOUNT_NUMBER	000123456789

PHI (Protected Health Information)

Type	Example
US_SSN	219-09-9999
MEDICAL_LICENSE	A1234567

You can restrict detection to specific types using a RedactConfig or by setting pii_types on a policy:

from expunct import Expunct, RedactConfig

client = Expunct(api_key="your-api-key")

config = RedactConfig(
    pii_types=["PERSON", "EMAIL_ADDRESS", "US_SSN"],
    redaction_method="blur",
    confidence_threshold=0.6,
)
job = client.redact.file("document.pdf", config=config.model_dump())

Exceptions

Exception	Raised when
AuthenticationError	API key is invalid or expired (401/403)
NotFoundError	Job or resource not found (404)
ValidationError	Request payload is invalid (422)
RateLimitError	Rate limit exceeded after retries (429)
PollingTimeoutError	wait_for_job exceeded the timeout
ApiError	Base class for all SDK errors

Links

• Documentation
• API Reference
• Sign up free
• GitHub

License

MIT