{"id":"oitc-modbus-server","name":"modbus-server","homepage":"https://hub.docker.com/r/oitc/modbus-server","repo_url":"https://hub.docker.com/r/oitc/modbus-server","category":"infrastructure","subcategories":[],"tags":["modbus","industrial-automation","tcp","protocol-server","iot-integration"],"what_it_does":"Provides a Modbus server implementation (speaking the Modbus protocol) to expose holding/input registers (and related Modbus data models) to Modbus clients.","use_cases":["Exposing machine/PLC-like register data to Modbus TCP clients","Building test rigs and simulators for Modbus clients","Integrating sensor/telemetry systems into Modbus-based legacy networks","Providing a local Modbus endpoint for development and debugging"],"not_for":["Internet-facing deployments without network segmentation/firewalling","Use cases requiring modern REST/HTTP semantics, RBAC, or fine-grained authorization","Highly reliable high-availability industrial control where Modbus-level error recovery is not explicitly handled"],"best_when":"You need a lightweight Modbus TCP server for LAN/industrial network integration or for simulating/modelling register maps for Modbus clients.","avoid_when":"You need strong application-layer security (authentication/authorization) or you cannot control network exposure; Modbus commonly lacks inherent security features beyond what the surrounding network provides.","alternatives":["Node-red Modbus nodes / vendor Modbus server products","Dedicated industrial gateway products that provide Modbus endpoints","Open-source Modbus implementations for your preferred language/runtime"],"af_score":18.2,"security_score":19.0,"reliability_score":17.5,"package_type":"mcp_server","discovery_source":["docker_mcp"],"priority":"low","status":"evaluated","version_evaluated":null,"last_evaluated":"2026-04-04T19:38:13.243649+00:00","interface":{"has_rest_api":false,"has_graphql":false,"has_grpc":false,"has_mcp_server":false,"mcp_server_url":null,"has_sdk":false,"sdk_languages":[],"openapi_spec_url":null,"webhooks":false},"auth":{"methods":[],"oauth":false,"scopes":false,"notes":"Modbus protocol servers typically rely on network controls (segmentation/VPN/firewall) rather than application auth. No specific auth mechanisms were provided in the supplied information."},"pricing":{"model":null,"free_tier_exists":false,"free_tier_limits":null,"paid_tiers":[],"requires_credit_card":false,"estimated_workload_costs":null,"notes":null},"requirements":{"requires_signup":false,"requires_credit_card":false,"domain_verification":false,"data_residency":[],"compliance":[],"min_contract":null},"agent_readiness":{"af_score":18.2,"security_score":19.0,"reliability_score":17.5,"mcp_server_quality":0.0,"documentation_accuracy":20.0,"error_message_quality":0.0,"error_message_notes":null,"auth_complexity":20.0,"rate_limit_clarity":0.0,"tls_enforcement":10.0,"auth_strength":10.0,"scope_granularity":0.0,"dependency_hygiene":30.0,"secret_handling":50.0,"security_notes":"Modbus TCP is frequently used without built-in authentication/authorization at the protocol layer; security typically depends on network controls (firewalls/VPN/segmentation) and careful exposure management. No details were provided about TLS, auth, or secret handling.","uptime_documented":0.0,"version_stability":20.0,"breaking_changes_history":20.0,"error_recovery":30.0,"idempotency_support":"false","idempotency_notes":null,"pagination_style":"none","retry_guidance_documented":false,"known_agent_gotchas":["Protocol-level operations (Modbus reads/writes) are not naturally idempotent; agents should avoid repeated writes unless operations are explicitly safe.","Modbus deployments are sensitive to timing/register semantics; agents may need to respect polling intervals and register mapping details."]}}