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What is this?

Alefba (الفبا) is Roshan AI's high-accuracy OCR / document-understanding service for Persian (fa), Arabic (ar) and English (en). Give it an image or PDF and it returns the text split into pages, paragraphs and lines — each with its bounding box, direction and recognition confidence — and it can tell tables, images and text apart. It also exports the analyzed document as a searchable PDF, Word or Excel file.

This server exposes Alefba to any MCP client (Claude or otherwise) as a set of first-class tools. Alefba is commonly self-hosted, and organizations often run many independent instances (per data-center, tenant, or environment), so named instances are a core concept here: every tool takes an optional instance argument selecting which deployment to talk to.

Features

• All Alefba endpoints as tools, prefixed alefba_ (read, pages, status, download to PDF/Word/Excel, delete, callback).
• URL input and local-file upload (multipart).
• Async OCR: queue with wait=false, then poll with alefba_get_result.
• Many named, self-hosted instances; pick per call via instance.
• Guardrails: http(s) URL validation, enum/number clamping, list-size limits, and token redaction — tokens are never logged or returned.
• Transports: stdio (default), sse, streamable-http.

Install

Requires Python 3.10+.

git clone <this-repo>
cd roshan-alefba-mcp
python -m venv .venv && . .venv/bin/activate
pip install -e ".[dev]"      # runtime + test deps (omit [dev] for runtime only)

Run it:

python -m roshan_alefba_mcp --help
python -m roshan_alefba_mcp --transport stdio          # default
python -m roshan_alefba_mcp --transport streamable-http

Configuration

Configuration is read from environment variables. The simplest setup uses the shorthand form, which synthesizes a single instance named default:

Variable	Description	Default
ROSHAN_ALEFBA_BASE_URL	Base URL of the default Alefba instance	https://alefba.roshan-ai.ir
ROSHAN_ALEFBA_TOKEN	API token for the default instance (sent as Authorization: Token <token>)	(none)

For multiple instances, use the nested form (one base_url + token per instance):

Variable	Description
ROSHAN_ALEFBA__INSTANCES__<NAME>__BASE_URL	Base URL for instance <NAME>
ROSHAN_ALEFBA__INSTANCES__<NAME>__TOKEN	Token for instance <NAME>
ROSHAN_ALEFBA__INSTANCES__<NAME>__VERIFY_SSL	Verify TLS for <NAME> (default true)
ROSHAN_ALEFBA__INSTANCES__<NAME>__TIMEOUT	Request timeout in seconds (default 60)
ROSHAN_ALEFBA__DEFAULT_INSTANCE	Instance used when a call omits instance (default default)
ROSHAN_ALEFBA__LOG_LEVEL	Log level (default INFO)

Example (two instances, default = dc1):

export ROSHAN_ALEFBA__INSTANCES__DC1__BASE_URL="https://alefba-dc1.example.ir"
export ROSHAN_ALEFBA__INSTANCES__DC1__TOKEN="token-1"
export ROSHAN_ALEFBA__INSTANCES__DC2__BASE_URL="https://alefba-dc2.example.ir"
export ROSHAN_ALEFBA__INSTANCES__DC2__TOKEN="token-2"
export ROSHAN_ALEFBA__DEFAULT_INSTANCE="dc1"

Call list_instances at any time to see configured instance names and base URLs (never tokens).

Use with an MCP client

Add the server to your client config (example for stdio):

{
  "mcpServers": {
    "roshan-alefba": {
      "command": "python",
      "args": ["-m", "roshan_alefba_mcp", "--transport", "stdio"],
      "env": {
        "ROSHAN_ALEFBA_BASE_URL": "https://alefba.roshan-ai.ir",
        "ROSHAN_ALEFBA_TOKEN": "your-token"
      }
    }
  }
}

Tool reference

All tools accept an optional instance (except list_instances and roshan_alefba_docs). OCR tools also share type (general | ID-card | excel), fix_orientation, word_positions, wait, and priority (1–4).

Tool	Endpoint	Purpose
alefba_read_document	POST /api/read_document/	Read (OCR) a document/image from a URL; sync (wait=true) or async (task_ids).
alefba_read_document_upload	POST /api/read_document/ (multipart)	Upload a local file_path and read it.
alefba_get_result	POST /api/read_document/	Fetch/poll an async result by task_id.
alefba_read_pages	POST /api/read_pages/	Read specific pages given as URLs with @page=N.
alefba_document_status	POST /api/document_status/	Per-document progress (analyzed, processed_pages, all_pages).
alefba_document_pages	POST /api/document_pages/	List a document's page URLs.
alefba_download_word	POST /api/download_word/	Download as Word (.docx); optional save_path.
alefba_download_excel	POST /api/download_excel/	Download as Excel (.xlsx); requires type=excel; optional save_path.
alefba_download_pdf	POST /api/download_pdf/	Download as searchable PDF (quality 0–100, color); optional save_path.
alefba_delete_document	POST /api/delete_document/	Delete a document and its results.
alefba_read_document_callback	POST /api/read_document/	Process and receive the result via a webhook callback_url.
healthcheck	GET /api/healthcheck/	Check an instance is up and ready.
list_instances	(local)	List configured instance names + base URLs (no tokens).
roshan_alefba_docs	(local)	Documentation about Alefba and these tools.

Download tools return the download URL and request payload by default; pass save_path to download the bytes and save them locally (the saved path is returned). box values in OCR results are "left top width height" in pixels.

Architecture

The MCP client calls tools registered by build_server(); the ocr, common and docs tool modules validate input (guardrails.py), resolve the target deployment (config.py) and talk to Alefba over an authenticated async HTTP client (client.py).

Self-hosting & scaling

One process can route to many self-hosted Alefba deployments, selected per call by instance:

The server is stateless, so scale it horizontally (more replicas behind a load balancer, or enable the Helm/Kubernetes HPA). Each replica reads the same instance configuration.

Request flow (async OCR + PDF export)

1. alefba_read_document(wait=false) queues the job; Alefba returns {state, task_ids}.
2. Poll alefba_get_result(task_id) until the full {document_url, pages[...]} result is ready.
3. alefba_download_pdf(document_url, save_path) exports a searchable PDF.

The diagrams above are generated with the diagrams library. Regenerate them with python assets/diagrams/generate_diagrams.py (requires pip install diagrams and the Graphviz dot binary).

Deployment

Manifests and modules live in deploy/:

• deploy/kubernetes/ — raw, kustomize-ready manifests.
• deploy/helm/roshan-alefba-mcp/ — Helm chart.
• deploy/terraform/ — Terraform (Kubernetes provider).
• Dockerfile + docker-compose.yml — container image and a two-instance compose example.

See deploy/README.md for details.

Testing

make test        # pytest, HTTP mocked with respx (live tests skipped)
make smoke       # offline: build server, list tools, assert invariants
python examples/inspect_server.py

Live tests against a real Alefba instance are skipped unless ROSHAN_ALEFBA_LIVE=1 and credentials are set.

License

MIT. "Roshan", the Roshan logo, and "Alefba" are trademarks of their respective owner and are used only to identify the upstream service this tool integrates with.