{"id":"ciresnave-json-mcp-server","name":"json-mcp-server","homepage":null,"repo_url":"https://github.com/ciresnave/json-mcp-server","category":"devtools","subcategories":[],"tags":["mcp","json","jsonpath","rust","json-rpc","filesystem","tools","llm-integration"],"what_it_does":"Provides a local Model Context Protocol (MCP) server exposing JSON-RPC tools to read, write/update, query (JSONPath), validate, and get help about JSON files—primarily for use by LLM/MCP clients via stdin/stdout.","use_cases":["Letting an LLM browse and extract data from local JSON files (optionally via JSONPath).","LLM-assisted transformation of JSON documents using merge/append/replacement semantics.","Validating JSON files and returning diagnostics to the user/agent.","Paginated reading of large JSON files to support incremental inspection."],"not_for":["Exposing JSON file operations over the open internet without additional sandboxing/auth controls.","Use as a multi-tenant hosted service without a strong authorization model and filesystem isolation.","Use as a general database replacement for concurrent writes/transactions."],"best_when":"Running locally (or in a tightly sandboxed environment) with an MCP-compatible client, where file paths are controlled and the LLM needs structured access to JSON on disk.","avoid_when":"When you cannot control which file paths the agent can request, or when you require strong enterprise security guarantees (authZ/authN, audit, tenant isolation) that are not described here.","alternatives":["Using a dedicated JSON query tool/library in an agent workflow (e.g., a script using jsonpath-wrangler / jq / python jsonpath).","Running a local script/service that provides narrower, audited file operations via an API.","Using established MCP utilities (if available) for filesystem/data access with built-in security controls."],"af_score":65.5,"security_score":22.8,"reliability_score":25.0,"package_type":"mcp_server","discovery_source":["github"],"priority":"low","status":"evaluated","version_evaluated":null,"last_evaluated":"2026-04-04T19:42:13.936841+00:00","interface":{"has_rest_api":false,"has_graphql":false,"has_grpc":false,"has_mcp_server":true,"mcp_server_url":null,"has_sdk":false,"sdk_languages":[],"openapi_spec_url":null,"webhooks":false},"auth":{"methods":["None described (stdin/stdout MCP server)"],"oauth":false,"scopes":false,"notes":"No authentication/authorization model is described. Access appears to rely on the MCP client/channel and the host environment. This increases the importance of sandboxing and controlling allowed file paths."},"pricing":{"model":null,"free_tier_exists":false,"free_tier_limits":null,"paid_tiers":[],"requires_credit_card":false,"estimated_workload_costs":null,"notes":"Pricing not described; distribution appears via Cargo and release binaries/scripts."},"requirements":{"requires_signup":false,"requires_credit_card":false,"domain_verification":false,"data_residency":[],"compliance":[],"min_contract":null},"agent_readiness":{"af_score":65.5,"security_score":22.8,"reliability_score":25.0,"mcp_server_quality":85.0,"documentation_accuracy":75.0,"error_message_quality":80.0,"error_message_notes":"README claims detailed error messages (file not found guidance, JSON syntax line/column, JSONPath suggestions) but does not show concrete error payload examples or codes.","auth_complexity":100.0,"rate_limit_clarity":0.0,"tls_enforcement":0.0,"auth_strength":10.0,"scope_granularity":0.0,"dependency_hygiene":55.0,"secret_handling":60.0,"security_notes":"MCP server communicates via stdin/stdout (no TLS/auth described). Security therefore depends on deployment controls (local/sandboxed execution, filesystem permissions, and limiting which file paths the agent can request). Write operations pose integrity risks; path arguments are a likely attack surface (e.g., path traversal) though specific mitigations are not documented. Dependency health is not verifiable from the provided content.","uptime_documented":0.0,"version_stability":30.0,"breaking_changes_history":30.0,"error_recovery":40.0,"idempotency_support":"false","idempotency_notes":"Read/query/validate are naturally idempotent; write operations are not described as idempotent. No idempotency keys or safe-write semantics are documented.","pagination_style":"tool-parameter pagination (limit/offset or start_index/limit) rather than protocol-level pagination","retry_guidance_documented":false,"known_agent_gotchas":["Potentially unrestricted filesystem access via file_path argument—agents may attempt path traversal or unintended files unless constrained by the client/runtime.","Write modes (replace/merge_shallow/merge_deep/append) could produce unexpected results if the agent supplies incorrectly structured data.","Large JSON handling relies on tool parameters (limit/offset/start_index) and JSONPath correctness; overly broad JSONPath queries may still produce large outputs."]}}