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opa-mcp-server OrygnsCode/opa-mcp-serverMCP server for Open Policy Agent (OPA) and the Rego policy language. Wraps the OPA CLI and Regal linter with 32 tools for authoring, evaluating, and debugging Rego policies through any MCP-compatible client.
The Ghost
This server runs locally on your machine. We can't scan it remotely; review the source code before installing.
Time indexed (4mo)
0 toolsLocal / STDIO4mo indexed
Checked Sep 8, 2026
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This server runs locally. We can't scan it remotely; review the source code before installing.
First indexed May 8, 2026
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Tools catalogued
0
No tools reported by this server.
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Hosting
Local / STDIO
Runs on your machine. Has access to your filesystem, SSH keys, and environment variables.
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Registry presence
Verified
Listed on the Official MCP Registry under Linux Foundation governance.
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✓ Listed on the Official MCP Registry under Linux Foundation governance.
Environment variables (10)?
OPA_URLstring OPTIONAL default: http://localhost:8181
Base URL of an OPA REST endpoint, used by opa_* tools.
OPA_TOKENstring OPTIONAL
Bearer token for OPA, if your instance requires auth. Treated as a secret. Never echoed in logs or tool responses.
OPA_BINARYstring OPTIONAL default: opa
Path to the opa CLI, used by rego_* tools.
REGAL_BINARYstring OPTIONAL default: regal
Path to the regal linter. Only required by rego_lint.
OPA_MCP_LOG_FILEstring OPTIONAL default: <tmpdir>/orygn-opa-mcp.log
Path the server appends logs to. The server never writes to stdout; that channel is reserved for the MCP protocol.
Show all 10 environment variables OPA_MCP_LOG_LEVELstring OPTIONAL default: info
One of debug, info, warn, error.
OPA_MCP_TIMEOUT_MSstring OPTIONAL default: 30000
Hard timeout for any spawned subprocess (opa, regal). After this, the child gets SIGTERM and then SIGKILL.
OPA_MCP_ALLOWED_PATHSstring OPTIONAL
Comma- or semicolon-separated list of directories the server is allowed to read policies from. When unset, file-based tools refuse to read from disk.
OPA_MCP_HTTP_TIMEOUT_MSstring OPTIONAL default: 15000
Timeout for HTTP requests to the OPA REST API.
OPA_MCP_MAX_RESPONSE_BYTESstring OPTIONAL default: 100000
Hard cap on a single tool response. Larger payloads are truncated with a __truncated: true marker.
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