rebar MCP Setup & Guide

{
  "id": "io.github.navapbc/rebar",
  "type": "mcp-server",
  "version": "0.13.1",
  "displayName": "rebar",
  "description": "Event-sourced ticket tracker + Jira reconciler, exposed as a Python library, CLI, and MCP server.",
  "repository": {
    "url": "https://github.com/navapbc/rebar",
    "source": "github"
  },
  "distribution": {
    "packages": [
      {
        "registryType": "pypi",
        "identifier": "nava-rebar",
        "version": "0.13.1",
        "runtimeHint": "uvx",
        "transport": "stdio",
        "environmentVariables": [
          {
            "name": "REBAR_ROOT",
            "description": "Path to the repo root that holds the .tickets-tracker store (defaults to the git toplevel of the working dir)."
          },
          {
            "name": "REBAR_MCP_READONLY",
            "description": "Set to 1 to expose only the read tools (no write/mutation tools)."
          },
          {
            "name": "REBAR_MCP_ALLOW_LLM",
            "description": "Set to 1 to enable the billable LLM tools (review_code / scan_spec / verify_completion / review_plan); off by default."
          },
          {
            "name": "REBAR_MCP_ALLOW_JIRA_SYNC",
            "description": "Set to 1 to allow the live (mutating) Jira reconcile mode; otherwise reconcile is dry-run only."
          },
          {
            "name": "REBAR_MCP_TRANSPORT",
            "description": "Transport for the MCP server: 'stdio' (default) or 'http' (the optional Streamable-HTTP transport)."
          },
          {
            "name": "REBAR_MCP_HTTP_HOST",
            "description": "Bind host for the Streamable-HTTP transport (default 127.0.0.1)."
          },
          {
            "name": "REBAR_MCP_HTTP_PORT",
            "description": "Bind port for the Streamable-HTTP transport (1-65535; default 8000)."
          },
          {
            "name": "REBAR_MCP_HTTP_PATH",
            "description": "URL path the Streamable-HTTP transport serves on (default /mcp)."
          },
          {
            "name": "REBAR_MCP_HTTP_ALLOWED_HOSTS",
            "description": "Comma-separated allowlist of exact host:port values accepted by the Streamable-HTTP DNS-rebinding protection; empty defaults to loopback."
          },
          {
            "name": "REBAR_MCP_HTTP_ALLOWED_ORIGINS",
            "description": "Comma-separated allowlist of exact Origin values accepted by the Streamable-HTTP DNS-rebinding protection; empty defaults to loopback."
          },
          {
            "name": "REBAR_MCP_HTTP_TLS_AT_EDGE",
            "description": "Set to 1 to acknowledge TLS is terminated at the edge; required to bind the Streamable-HTTP transport to a non-loopback host."
          },
          {
            "name": "REBAR_MCP_ALLOW_UNAUTHENTICATED_HTTP",
            "description": "Set to 1 to acknowledge running the Streamable-HTTP transport without a token verifier; required to boot the HTTP transport while auth is off."
          },
          {
            "name": "REBAR_MCP_AUTH_ENABLED",
            "description": "Set to 1 to enable MCP authentication (the composite token verifier + Resource-Server wiring); off by default."
          },
          {
            "name": "REBAR_MCP_AUTH_STRATEGIES",
            "description": "Comma-separated, ordered list of token-verifier strategies to compose (closed set: static, jwt, introspection, proxy, custom)."
          },
          {
            "name": "REBAR_MCP_AUTH_ISSUER_URL",
            "description": "OAuth authorization-server issuer URL advertised in the Protected-Resource Metadata (RFC 9728) when auth is enabled."
          },
          {
            "name": "REBAR_MCP_AUTH_RESOURCE_SERVER_URL",
            "description": "The single resource identifier (RFC 8707 audience) for this server; the composite verifier re-checks every accepted token against it."
          },
          {
            "name": "REBAR_MCP_AUTH_REQUIRED_SCOPES",
            "description": "Comma-separated scopes a caller must hold; the SDK returns 403 insufficient_scope when a principal lacks one."
          },
          {
            "name": "REBAR_MCP_AUTH_STATIC_TOKENS_FILE",
            "description": "Path to the JSON secrets file for the static-bearer verifier (stores only SHA-256 digests of the accepted tokens)."
          },
          {
            "name": "REBAR_MCP_AUTH_JWT_JWKS_URI",
            "description": "HTTPS JWKS endpoint the `jwt` verifier fetches signing keys from (an OIDC provider's .well-known/jwks.json)."
          },
          {
            "name": "REBAR_MCP_AUTH_JWT_ISSUER",
            "description": "Expected `iss` claim for the `jwt` verifier; falls back to REBAR_MCP_AUTH_ISSUER_URL when unset."
          },
          {
            "name": "REBAR_MCP_AUTH_JWT_ALGORITHMS",
            "description": "Comma-separated PINNED, asymmetric-only JWS algorithms for the `jwt` verifier (default RS256,ES256); a symmetric algorithm on a JWKS source is refused."
          },
          {
            "name": "REBAR_MCP_AUTH_JWT_LEEWAY",
            "description": "Clock-skew leeway in seconds applied to exp/nbf validation by the `jwt` verifier (default 60)."
          },
          {
            "name": "REBAR_MCP_AUTH_JWT_JWKS_REFETCH_COOLDOWN",
            "description": "Minimum seconds between JWKS refetches triggered by an unknown key id (the concurrency-safe flood guard; default 30)."
          },
          {
            "name": "REBAR_MCP_AUTH_JWT_JWKS_TIMEOUT",
            "description": "HTTP timeout in seconds for the `jwt` verifier's JWKS fetch (default 10)."
          },
          {
            "name": "REBAR_MCP_AUTH_JWT_EXPECTED_TYP",
            "description": "When set, the `jwt` verifier requires the JWT header `typ` to equal this (e.g. at+JWT per RFC 9068); unset skips the check."
          },
          {
            "name": "REBAR_MCP_AUTH_JWT_ALLOW_PRIVATE_JWKS_HOST",
            "description": "Set to 1 to permit a private/link-local/loopback JWKS host (SSRF guard is on by default); off by default."
          },
          {
            "name": "REBAR_MCP_AUTH_INTROSPECTION_ENDPOINT",
            "description": "The `introspection` verifier's RFC 7662 endpoint URL (must be https://); the opaque token is POSTed here on every request (no caching)."
          },
          {
            "name": "REBAR_MCP_AUTH_INTROSPECTION_CLIENT_ID",
            "description": "The client id the `introspection` verifier presents to the Authorization Server via HTTP Basic (client_secret_basic)."
          },
          {
            "name": "REBAR_MCP_AUTH_INTROSPECTION_CLIENT_SECRET_ENV",
            "description": "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)."
          },
          {
            "name": "REBAR_MCP_AUTH_INTROSPECTION_ALLOW_PRIVATE_HOST",
            "description": "Set to 1 to permit a private/link-local/loopback introspection endpoint host (SSRF guard is on by default); off by default."
          },
          {
            "name": "REBAR_MCP_AUTH_INTROSPECTION_ALLOW_MISSING_AUD",
            "description": "Set to 1 to accept an active introspection response that OMITS `aud` (many AS do); off by default (fail-closed reject)."
          },
          {
            "name": "REBAR_MCP_AUTH_PROXY_SECRET_ENV",
            "description": "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)."
          },
          {
            "name": "REBAR_MCP_AUTH_PROXY_SECRET_HEADER",
            "description": "The header the fronting proxy sends its shared secret on; the identity is trusted only when this matches (constant-time; default x-proxy-auth)."
          },
          {
            "name": "REBAR_MCP_AUTH_PROXY_IDENTITY_HEADER",
            "description": "The header carrying the proxy-authenticated principal identity, trusted only when the secret header validates (default x-forwarded-user)."
          },
          {
            "name": "REBAR_MCP_AUTH_PROXY_SCOPES",
            "description": "Comma-separated fixed scope set granted to proxy-authenticated principals; empty by default (the principal holds no scopes)."
          },
          {
            "name": "REBAR_MCP_AUTH_CUSTOM_IMPORT",
            "description": "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)."
          }
        ]
      }
    ],
    "remotes": []
  },
  "dependencies": [],
  "installTargets": [
    "claude-code",
    "claude-desktop",
    "cursor",
    "vscode",
    "trae",
    "cherry-studio",
    "lingma",
    "windsurf",
    "cline",
    "workbuddy"
  ],
  "keywords": [],
  "provenance": {
    "origin": "official-mcp-registry",
    "originalId": "io.github.navapbc/rebar",
    "originalUrl": "https://registry.modelcontextprotocol.io/v0.1/servers/io.github.navapbc%2Frebar/versions/latest",
    "isOfficial": true,
    "status": "active"
  }
}