{"id":"solnera-esp32-mcpserver","name":"esp32-mcpserver","homepage":null,"repo_url":"https://github.com/solnera/esp32-mcpserver","category":"devtools","subcategories":[],"tags":["mcp","esp32","embedded","json-rpc","http-server","ai-agents","iot","tooling","c-plus-plus"],"what_it_does":"An MCP (Model Context Protocol) server framework for ESP32 that exposes tools over HTTP using JSON-RPC 2.0. It supports initializing an MCP session, listing tools, and invoking registered tools with JSON Schema-validated inputs/outputs.","use_cases":["Expose ESP32 hardware capabilities as MCP tools to LLM agents","Prototype local/edge-first “agent-to-device” interactions","Implement custom tool endpoints (e.g., echo, sensors/actuators) with JSON schema validation"],"not_for":["Internet-facing deployments without network controls","Production systems requiring strong authentication/authorization out of the box","Use cases needing high availability or documented operational guarantees"],"best_when":"You have an ESP32 on a trusted network (e.g., local WiFi) and want a lightweight way to let an MCP client/agent discover and call device tools.","avoid_when":"You need secure remote access (public internet) or require documented security features like authentication, rate limiting policies, and robust error semantics.","alternatives":["MCP-compatible servers running on a more secure gateway (e.g., small Linux device) that talk to ESP32 over MQTT/serial","Custom REST/GraphQL/gRPC service for device control plus a separate MCP translation layer","Other MCP server frameworks or SDKs hosted off-device with strict auth and observability"],"af_score":37.8,"security_score":19.8,"reliability_score":15.0,"package_type":"mcp_server","discovery_source":["github"],"priority":"high","status":"evaluated","version_evaluated":null,"last_evaluated":"2026-03-30T15:42:49.672436+00:00","interface":{"has_rest_api":true,"has_graphql":false,"has_grpc":false,"has_mcp_server":true,"mcp_server_url":null,"has_sdk":false,"sdk_languages":["C++"],"openapi_spec_url":null,"webhooks":false},"auth":{"methods":[],"oauth":false,"scopes":false,"notes":"The README does not describe any authentication/authorization mechanism. Requests appear to be accepted at a POST /mcp endpoint with an optional mcp-session-id header."},"pricing":{"model":null,"free_tier_exists":false,"free_tier_limits":null,"paid_tiers":[],"requires_credit_card":false,"estimated_workload_costs":null,"notes":"Open-source framework (MIT) per repo metadata; no hosted pricing described."},"requirements":{"requires_signup":false,"requires_credit_card":false,"domain_verification":false,"data_residency":[],"compliance":[],"min_contract":null},"agent_readiness":{"af_score":37.8,"security_score":19.8,"reliability_score":15.0,"mcp_server_quality":70.0,"documentation_accuracy":55.0,"error_message_quality":0.0,"error_message_notes":null,"auth_complexity":20.0,"rate_limit_clarity":0.0,"tls_enforcement":20.0,"auth_strength":10.0,"scope_granularity":0.0,"dependency_hygiene":35.0,"secret_handling":40.0,"security_notes":"No authentication/authorization is described for the MCP endpoint; deployment should be restricted to a trusted network. README does not state TLS/HTTPS support or rate limiting. Security posture depends heavily on how the ESP32 server is exposed and on the underlying ESPAsyncWebServer configuration.","uptime_documented":0.0,"version_stability":20.0,"breaking_changes_history":20.0,"error_recovery":20.0,"idempotency_support":"false","idempotency_notes":null,"pagination_style":"none","retry_guidance_documented":false,"known_agent_gotchas":["Endpoint is a single POST /mcp; clients must handle JSON-RPC 2.0 details correctly","No documented authentication; assume only trusted network usage unless you add your own protection","Idempotency behavior for tools is not documented; retry strategies may need tool-specific caution"]}}