estravon-backend
Self-hosted PDF extraction backend for the Estravon Zotero plugin.
Independent project. Estravon is not affiliated with, endorsed by, or in any way connected to the Zotero project or the Corporation for Digital Scholarship. Zotero is a registered trademark of the Corporation for Digital Scholarship.
Extracts nominated sections of a book PDF to Markdown and attaches the result directly to the Zotero item — synced, versioned, always co-located with the source.
Just want to run it? Skip this page — follow the step-by-step guide at
estravon.com/install instead. It covers pip install,
virtual environments, and .env configuration without requiring a clone.
This README is for people who want to read the source, modify the backend, or run in editable mode.
Developer setup
git clone https://github.com/tiberavonltd/estravon-backend.git
cd estravon-backend
python -m venv .venv
source .venv/bin/activate # Windows: .venv\Scripts\activate
pip install -e ".[dev]"
Create a .env file in the repo root and add your API key:
MISTRAL_API_KEY=your_key_here
Get a key at console.mistral.ai (~$0.002/page).
Start the backend:
estravon --port 7766
Run the test suite:
pytest
Supported extraction backends
| Backend | Pricing | .env config |
|---|---|---|
| Mistral OCR | ~$0.002/page, pay-as-you-go | MISTRAL_API_KEY=... (default) |
| Datalab | $25/month flat | DATALAB_API_KEY=... + _ZM_BACKEND=datalab |
| Replicate | Pay-as-you-go | REPLICATE_API_TOKEN=... + _ZM_BACKEND=replicate |
Architecture
Zotero plugin → POST /process → run_extraction()
↓
MistralBackend | DatalabBackend | ReplicateBackend
↓
result .md + images returned
The backend is a single-process FastHTML server. One job runs
at a time; the plugin polls GET /jobs/{id} until the result is ready.
GET /status exposes the current server state (idle / running / error).
Health check
curl http://localhost:7766/ping
# {"status":"ok","state":"idle","backend":"mistral"}
curl http://localhost:7766/status
# {"state":"idle","state_since_s":4.1,"backend":"mistral","last_job":{}}
Links
License
AGPL-3.0 — the same license as Zotero itself.
1 maintainer
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