GetBible MCP

Production-ready Model Context Protocol access to GetBible API V2 over both standard MCP transports:

• Streamable HTTP for the public service at https://mcp.getbible.net/v2

• stdio for developers who install the package and let an AI client launch it locally

Both transports expose exactly the same tools, resources, prompts, validation, and scripture-cache integrity rules.

What the two transports mean

stdio does not create a public endpoint. The MCP host starts the command as a child process and exchanges JSON-RPC messages over standard input and output. That local process still reads scripture from the public GetBible API.

Streamable HTTP is a persistent remote service. Nginx accepts HTTPS connections and proxies only the exact MCP endpoint to the Python application.

                         ┌─ api.getbible.net/v2
AI client ── MCP ──> GetBible MCP
                         └─ query.getbible.net/v2

Remote: AI client ─ HTTPS ─ Nginx ─ Streamable HTTP process
Local:  AI client ─ stdio ─ locally installed process

Related MCP server: biblebridge-mcp

Public API access and translation rights

GetBible API V2 is open worldwide. It requires no registration, account, API key, authentication, subscription, payment, or request quota. The supplied Nginx configuration likewise adds no per-address request throttle. The underlying static API is built for heavy public use and already serves millions of requests per day.

Each translation's return data includes its applicable copyright information, including in the translation catalog. Applications must preserve and honor that metadata. GetBible does not add a second copyright layer to scripture text, and this repository's GPL license applies only to the MCP software—it does not relicense translations or override publisher terms.

Correct API use is conditioned on honoring the hash-validation cycle described below. An integration that keeps cached scripture without revalidating its hashes is not complying with the GetBible API usage agreement.

MCP capabilities

Tools

All tools are read-only, non-destructive, and idempotent.

Resources

• getbible://docs/api-v2

• getbible://docs/cache-policy

• getbible://docs/usage-policy

Prompt

• design_getbible_integration

Mandatory scripture-cache integrity

GetBible builds follow upstream CrossWire modules. When scripture is corrected upstream, the hash for the affected scope changes. Every downstream integration that caches scripture must:

1. Store the payload with the hash for its exact translation, book, or chapter scope.

2. Revalidate that hash at least weekly.

3. Invalidate the changed scope and every cached descendant.

4. Fetch fresh scripture and its hash into temporary storage.

5. Atomically replace the stale record.

get_scripture checks the matching .sha value before and after retrieving JSON. If a build changes mid-request, it retries once instead of returning mismatched data and hash. query_verses resolves and returns the hash for every participating chapter, checking the complete hash set before and after the query; unresolved results are marked non-cacheable.

See site/v2/cache-policy.md.

Quick local stdio setup

Clone the repository and build an isolated environment:

git clone https://github.com/getbible/mcp.git getbible-mcp
cd getbible-mcp
python3 -m venv .venv
.venv/bin/python -m pip install --upgrade pip
.venv/bin/python -m pip install -r requirements.txt
.venv/bin/python -m pip install --no-deps .

Configure the MCP client with the absolute executable path:

{
  "mcpServers": {
    "getbible": {
      "command": "/absolute/path/getbible-mcp/.venv/bin/getbible-mcp",
      "args": ["--transport", "stdio"]
    }
  }
}

Do not wrap or embed Python inside a shell configuration. The client launches the installed Python entry point directly.

See docs/CLIENTS.md for stdio, remote, Docker, and Inspector examples.

Quick production deployment

The included deployment assumes Ubuntu, Nginx, systemd, and DNS for mcp.getbible.net.

sudo apt-get install python3-venv rsync nginx certbot python3-certbot-nginx
sudo ./manage install
sudo certbot --nginx -d mcp.getbible.net
sudo ./manage status

The deployment is release-based. A new release and virtual environment are fully built before the /opt/getbible-mcp/current symlink changes. If the service or health check fails, the manager restores the previous release automatically.

Nginx serves the root discovery page and /v2/ documentation directly. Only the exact, no-trailing- slash endpoint /v2 is proxied to the MCP process.

See docs/DEPLOYMENT.md before the first installation.

Downloadable packages, TestPyPI, and PyPI

Every successful test workflow run builds and smoke-tests one wheel and one source distribution. GitHub keeps them for 30 days in the run's Artifacts section under the name python-package-distributions. This includes runs started manually from Actions → test → Run workflow, so a package can be downloaded and tested without publishing anything.

The separate publish-testpypi workflow is manually triggered and publishes the same validated artifacts to TestPyPI. Production publishing can be started manually or by publishing a GitHub Release; publish-pypi.yml repeats the full validation, verifies the requested release tag, and publishes the validated artifacts to PyPI.

TestPyPI uses Trusted Publishing. Production PyPI reads the project or account token only from the PYPI_MCP_TOKEN GitHub Actions secret in the protected pypi environment. See docs/PUBLISHING.md for the download, TestPyPI, secret setup, and production release procedures.

Development

python3 -m venv .venv
.venv/bin/python -m pip install -r requirements-dev.txt
.venv/bin/python -m pip install --no-deps -e .
chmod +x manage scripts/check
./scripts/check

The suite covers API validation, hash-consistent reads, grouped-reference hashes, MCP schema discovery, Streamable HTTP initialization, stdio initialization, static JSON validation, and CLI behavior.

Repository layout

src/getbible_mcp/       Python MCP implementation
site/                   Nginx-served discovery and V2 documentation
deploy/                 systemd, Nginx, and environment templates
docs/                   Architecture, deployment, clients, operations, security
tests/                  Unit and protocol integration tests
manage                  Pure Bash deployment and lifecycle manager

Documentation

• Architecture

• Deployment

• Client connections

• Operations and updates

• Security model

• Testing

• Publishing to PyPI

• MCP Registry publishing

Versioning

The remote /v2 endpoint and all files under site/v2/ are permanently scoped to GetBible API V2. Breaking MCP tool or output changes require an explicitly versioned migration. Compatible security, validation, description, and reliability fixes may be released within this contract.

License

The GetBible MCP software is licensed under the GNU General Public License, version 2 or later. Scripture translations remain governed by the copyright information returned for each translation; the software license does not relicense scripture content.