The Anvil SDK for Python

Build document workflows in Python with the Anvil SDK. Generate PDFs, fill templates, and collect e-signatures from one package.

Python SDK on GitHub API Documentation

Products

Click on a product to view documentation.

PDF Generation

Generate pixel-perfect PDFs from HTML, CSS, or Markdown with a single API call.

PDF Fill

Fill existing PDF templates programmatically. Send data, get back a completed document.

Etch

Request legally binding e-signatures on any document. Collect signatures from any device.

Python SDK features

Rate and concurrency limits are respected for you, so bursts of requests queue instead of failing.

Python Example
from concurrent.futures import ThreadPoolExecutor

from python_anvil import Anvil

anvil = Anvil()

# The client is thread-safe and every thread shares one rate limiter, so a
# burst queues instead of failing. A 429 is retried after its Retry-After.
with ThreadPoolExecutor(max_workers=10) as pool:
    pdfs = list(pool.map(lambda c: anvil.fill_pdf(template_eid, {"data": c}), customers))

Get started

Installation

The python-anvil package is MIT-licensed and maintained in the open on GitHub.

$ pip install python-anvil

Set-up with Claude

Let Claude build your integration

Install the Anvil Document SDK plugin in Claude Code and Claude will scaffold the SDK into your codebase — discovery, planning, and production-ready code.

/plugin marketplace add anvilco/anvil-plugins
/plugin install anvil-document-sdk@anvil-plugins

No API key setup needed. The plugin connects to your Anvil account with OAuth and logs you in automatically.

Why Anvil

We're fast

Generate, fill, and e-sign PDFs in a single API call, whether it's one document or a million.

Flexibility

Generate PDFs from HTML or Markdown, fill existing templates, and request signatures on any of them, all from the same SDK.

Easy-to-use

Install the package, add your API key, and make your first request in minutes. The SDK is MIT-licensed and maintained in the open on GitHub.

Compliant

SOC 2 Type 2 certified, HIPAA-eligible with a BAA, and GDPR-ready. Documents are processed in-memory and never persisted unless you ask us to store them.

Get a demo
(from a real person)

Schedule some time on our calendar to talk through your specific use case and see which Anvil products can help.

Want to try Anvil first?

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