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Rebar MCP Server

local only

Rebar runs on your own machine — the client starts it, so there is no endpoint to ping. 405 installs a week from pypi. Last commit 5 Nov 2026.

Event-sourced ticket tracker + Jira reconciler, exposed as a Python library, CLI, and MCP server.

Installs per day peak 404 · avg 66 · -45% w/w
a month agotoday
405
Installs / week
pypi · nava-rebar
5
Stars
0 open issues
5 Nov 2026
Last commit
from GitHub
Apache-2.0
License
Python

What the code does

We read the source, 2 d ago · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

File ships in the package but is absent from the source [пакет] src/rebar/_build_info.py:1, [пакет] src/rebar/_engine_support/resolver.py:1
этот файл ставится пользователю, но в репозитории его нет
        ticket_dir = os.path.join(tracker_dir, current)
        doc = yaml.load(text, Loader=_loader_cls())
In the project's build, not in the package

Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.

USER root

# AlmaLinux defaults to Python 3.9. Install 3.11 for g2p and assert
# the minimum at build time.

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

run in your terminal
claude mcp add rebar -- uvx nava-rebar
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "rebar": {
      "command": "uvx",
      "args": [
        "nava-rebar"
      ]
    }
  }
}
~/.codex/config.toml
[mcp_servers.rebar]
command = "uvx"
args = ["nava-rebar"]
.cursor/mcp.json
{
  "mcpServers": {
    "rebar": {
      "command": "uvx",
      "args": [
        "nava-rebar"
      ]
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "rebar": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "nava-rebar"
      ]
    }
  }
}

Optional settings from the registry entry, left out of the block above: REBAR_ROOT (Path to the repo root that holds the .tickets-tracker store (defaults to the git toplevel of the working dir)), REBAR_MCP_READONLY (Set to 1 to expose only the read tools (no write/mutation tools)), REBAR_MCP_ALLOW_LLM (Set to 1 to enable the billable LLM tools (review_code / scan_spec / verify_completion / review_plan); off by default), REBAR_MCP_DEDUP (In-flight de-duplication of the long-running gate tools (review_plan / verify_completion): a concurrent duplicate call for the same ticket+basis attaches to the running gate instead of launching a second billable LLM pass. On by default; set to 0 to disable (kill-switch)), REBAR_MCP_ALLOW_JIRA_SYNC (Set to 1 to allow bridge_sync to perform live (mutating) Jira sync; otherwise bridge_sync uses dry-run behavior), REBAR_MCP_TRANSPORT (Transport for the MCP server: 'stdio' (default) or 'http' (the optional Streamable-HTTP transport)), REBAR_MCP_HTTP_HOST (Bind host for the Streamable-HTTP transport (default 127.0.0.1)), REBAR_MCP_HTTP_PORT (Bind port for the Streamable-HTTP transport (1-65535; default 8000)), REBAR_MCP_HTTP_PATH (URL path the Streamable-HTTP transport serves on (default /mcp)), REBAR_MCP_HTTP_ALLOWED_HOSTS (Comma-separated allowlist of exact host:port values accepted by the Streamable-HTTP DNS-rebinding protection; empty defaults to loopback), REBAR_MCP_HTTP_ALLOWED_ORIGINS (Comma-separated allowlist of exact Origin values accepted by the Streamable-HTTP DNS-rebinding protection; empty defaults to loopback), REBAR_MCP_HTTP_TLS_AT_EDGE (Set to 1 to acknowledge TLS is terminated at the edge; required to bind the Streamable-HTTP transport to a non-loopback host), REBAR_MCP_ALLOW_UNAUTHENTICATED_HTTP (Set to 1 to acknowledge running the Streamable-HTTP transport without a token verifier; required to boot the HTTP transport while auth is off), REBAR_MCP_AUTH_ENABLED (Set to 1 to enable MCP authentication (the composite token verifier + Resource-Server wiring); off by default), REBAR_MCP_AUTH_STRATEGIES (Comma-separated, ordered list of token-verifier strategies to compose (closed set: static, jwt, introspection, proxy, custom)), REBAR_MCP_AUTH_ISSUER_URL (OAuth authorization-server issuer URL advertised in the Protected-Resource Metadata (RFC 9728) when auth is enabled), REBAR_MCP_AUTH_RESOURCE_SERVER_URL (The single resource identifier (RFC 8707 audience) for this server; the composite verifier re-checks every accepted token against it), REBAR_MCP_AUTH_REQUIRED_SCOPES (Comma-separated scopes a caller must hold; the SDK returns 403 insufficient_scope when a principal lacks one), REBAR_MCP_AUTH_STATIC_TOKENS_FILE (Path to the JSON secrets file for the static-bearer verifier (stores only SHA-256 digests of the accepted tokens)), REBAR_MCP_AUTH_JWT_JWKS_URI (HTTPS JWKS endpoint the `jwt` verifier fetches signing keys from (an OIDC provider's .well-known/jwks.json)), REBAR_MCP_AUTH_JWT_ISSUER (Expected `iss` claim for the `jwt` verifier; falls back to REBAR_MCP_AUTH_ISSUER_URL when unset), REBAR_MCP_AUTH_JWT_ALGORITHMS (Comma-separated PINNED, asymmetric-only JWS algorithms for the `jwt` verifier (default RS256,ES256); a symmetric algorithm on a JWKS source is refused), REBAR_MCP_AUTH_JWT_LEEWAY (Clock-skew leeway in seconds applied to exp/nbf validation by the `jwt` verifier (default 60)), REBAR_MCP_AUTH_JWT_JWKS_REFETCH_COOLDOWN (Minimum seconds between JWKS refetches triggered by an unknown key id (the concurrency-safe flood guard; default 30)), REBAR_MCP_AUTH_JWT_JWKS_TIMEOUT (HTTP timeout in seconds for the `jwt` verifier's JWKS fetch (default 10)), REBAR_MCP_AUTH_JWT_EXPECTED_TYP (When set, the `jwt` verifier requires the JWT header `typ` to equal this (e.g. at+JWT per RFC 9068); unset skips the check), REBAR_MCP_AUTH_JWT_ALLOW_PRIVATE_JWKS_HOST (Set to 1 to permit a private/link-local/loopback JWKS host (SSRF guard is on by default); off by default), REBAR_MCP_AUTH_INTROSPECTION_ENDPOINT (The `introspection` verifier's RFC 7662 endpoint URL (must be https://); the opaque token is POSTed here on every request (no caching)), REBAR_MCP_AUTH_INTROSPECTION_CLIENT_ID (The client id the `introspection` verifier presents to the Authorization Server via HTTP Basic (client_secret_basic)), REBAR_MCP_AUTH_INTROSPECTION_CLIENT_SECRET_ENV (The NAME of the env var holding the introspection client secret (never the secret itself); must be present + non-empty at startup or the server refuses to start (fail-closed)), REBAR_MCP_AUTH_INTROSPECTION_ALLOW_PRIVATE_HOST (Set to 1 to permit a private/link-local/loopback introspection endpoint host (SSRF guard is on by default); off by default), REBAR_MCP_AUTH_INTROSPECTION_ALLOW_MISSING_AUD (Set to 1 to accept an active introspection response that OMITS `aud` (many AS do); off by default (fail-closed reject)), REBAR_MCP_AUTH_PROXY_SECRET_ENV (The NAME of the env var holding the trusted-proxy shared secret (never the secret itself); must be present + non-empty at startup or the `proxy` verifier refuses to start (fail-closed)), REBAR_MCP_AUTH_PROXY_SECRET_HEADER (The header the fronting proxy sends its shared secret on; the identity is trusted only when this matches (constant-time; default x-proxy-auth)), REBAR_MCP_AUTH_PROXY_IDENTITY_HEADER (The header carrying the proxy-authenticated principal identity, trusted only when the secret header validates (default x-forwarded-user)), REBAR_MCP_AUTH_PROXY_SCOPES (Comma-separated fixed scope set granted to proxy-authenticated principals; empty by default (the principal holds no scopes)), REBAR_MCP_AUTH_CUSTOM_IMPORT (The `custom` strategy's `module:factory` import string, resolving to a factory that returns a TokenVerifier; a TRUSTED operator config value that loads and executes the operator-configured code at startup (fail-closed on any load error)).

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Rebar — questions

Answers built from our own checks of this server.

Why is there no uptime for Rebar?
Rebar runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the pypi package nava-rebar was installed 405 times last week.
How do I connect Rebar?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls nava-rebar straight from pypi; nothing to host, nothing to sign up for.
How many people use Rebar?
The pypi package nava-rebar was installed 405 times in the last week. Week over week that is -45%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Rebar open source?
Yes — it is published under the Apache-2.0 licence, written in Python and 5 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.