{"id":"rainyheart-jcrawl4ai-mcp-server","name":"jcrawl4ai-mcp-server","homepage":null,"repo_url":"https://github.com/rainyheart/jcrawl4ai-mcp-server","category":"ai-ml","subcategories":[],"tags":["mcp","spring-boot","java","web-crawling","crawl4ai","automation","stdio"],"what_it_does":"jcrawl4ai-mcp-server is a Spring Boot-based MCP server (stdio transport) that exposes MCP tools to call a Crawl4ai API: it can start a crawl for a set of URLs (returning a task ID / JSON result) and fetch crawl results by taskId.","use_cases":["Integrate a web crawling workflow into an MCP-capable agent","Start Crawl4ai crawl jobs from an agent and later retrieve results","Automate structured extraction pipelines that depend on crawl results"],"not_for":["High-sensitivity environments without reviewing token handling/logging and Crawl4ai API security model","Workflows requiring strict guarantees about crawl politeness, robots.txt behavior, or output validation (not specified in the README)"],"best_when":"You want an MCP tool interface for Crawl4ai (crawl + task retrieval) and can securely provide base URL + API token to the server.","avoid_when":"You cannot verify how errors/timeouts are handled or where logs/token values may be written; or you require well-specified rate limits, retry semantics, and pagination for robust agent operation.","alternatives":["Use Crawl4ai directly via its own API from your agent (REST/SDK if available)","Build a thin custom MCP wrapper around Crawl4ai with your own error handling and retry/idempotency controls","Use another existing MCP server wrapper for Crawl4ai/Crawling if it offers clearer contracts (OpenAPI/tool schemas)"],"af_score":43.5,"security_score":37.2,"reliability_score":16.2,"package_type":"mcp_server","discovery_source":["github"],"priority":"low","status":"evaluated","version_evaluated":null,"last_evaluated":"2026-04-04T19:41:31.900881+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":["Java"],"openapi_spec_url":null,"webhooks":false},"auth":{"methods":["API token via application.properties (cawl4ai.api-token)"],"oauth":false,"scopes":false,"notes":"Authentication is delegated to the upstream Crawl4ai server using a static API token configured in application.properties. The README does not describe token scope granularity or rotation guidance."},"pricing":{"model":null,"free_tier_exists":false,"free_tier_limits":null,"paid_tiers":[],"requires_credit_card":false,"estimated_workload_costs":null,"notes":"No pricing information for this MCP wrapper is provided; costs may depend on the upstream Crawl4ai service."},"requirements":{"requires_signup":false,"requires_credit_card":false,"domain_verification":false,"data_residency":[],"compliance":[],"min_contract":null},"agent_readiness":{"af_score":43.5,"security_score":37.2,"reliability_score":16.2,"mcp_server_quality":60.0,"documentation_accuracy":55.0,"error_message_quality":0.0,"error_message_notes":null,"auth_complexity":80.0,"rate_limit_clarity":10.0,"tls_enforcement":20.0,"auth_strength":55.0,"scope_granularity":20.0,"dependency_hygiene":50.0,"secret_handling":40.0,"security_notes":"TLS enforcement is not specified; the sample base URL uses http:// which may imply insecure transport if followed as-is. Auth uses a static API token but the README provides no information on scope granularity, rotation, or whether tokens are ever logged. Dependency hygiene cannot be assessed from the provided content; Spring Boot/Hutool/Spring AI are referenced without version details or CVE posture. Review logging configuration because the README points to a log file path (./target/mcp-stdio-server.log), but it does not state whether secrets are redacted.","uptime_documented":0.0,"version_stability":40.0,"breaking_changes_history":0.0,"error_recovery":25.0,"idempotency_support":"false","idempotency_notes":"The README describes crawl/task methods but does not state whether repeated crawl calls are safe/idempotent or whether the server supports deduplication by input/task parameters.","pagination_style":"none","retry_guidance_documented":false,"known_agent_gotchas":["The MCP server is configured for stdio with a fixed timeout (60 in the sample). If upstream crawl jobs are slow, agents may need to poll task results; retry/polling guidance is not documented.","Tool parameters (strategy, output_format, max_depth, urls/taskId) are not fully specified (types, allowed values, limits).","No rate-limit behavior or backoff strategy is described for either the MCP server or the upstream Crawl4ai API."]}}