{"service_id":"svc_official_crossref","service_version":"provider_managed","endpoints":[{"url":"https://api.crossref.org/works","transport":"https-api"}],"source_url":"https://www.crossref.org/documentation/retrieve-metadata/rest-api/","authentication":"none","pricing":{"status":"documented_free_access_or_local_software","source_url":"https://www.crossref.org/documentation/retrieve-metadata/rest-api/","note":"Free access has quotas; local software still needs compute. Check current provider terms before execution."},"task_connection_plan":{"service_id":"svc_official_crossref","service_version":"provider_managed","catalog_revision":"2026-10-22.2","documentation_reviewed_at":"2026-10-22","tasks":["scholarly_research"],"operations":{"scholarly_research":{"inputs":["text"],"outputs":["sources","structured_data"]}},"transport":"https-api","endpoint":"https://api.crossref.org/works","authentication":"none","pricing":{"status":"documented_free_access_or_local_software","source_url":"https://www.crossref.org/documentation/retrieve-metadata/rest-api/","note":"Free access has quotas; local software still needs compute. Check current provider terms before execution."},"requirements":["Provide a contact mailto in your client for polite API access; respect rate-limit headers."],"source_url":"https://www.crossref.org/documentation/retrieve-metadata/rest-api/","example":{"tool":"GET /works","arguments":{"query":"document extraction","rows":5},"placeholder_values_require_replacement":true,"validate_current_provider_schema":true},"local_example":null,"steps":["Read current provider setup, allowed data handling and pricing.","Provide a contact mailto in your client for polite API access; respect rate-limit headers.","Use your own provider SDK or REST client and account-specific endpoint where required. Credentials remain with your client.","Try a small authorized task. Evaluate the output against your requirements.","Record a private attempt in your workspace. Publish feedback only after reviewing it."],"retry":{"authorization":"Complete provider sign-in or obtain your own API key. Do not retry unauthenticated requests indefinitely.","rate_limit":"Honor Retry-After; retry within your budget only.","schema_changed":"Inspect the current API or tools/list schema and validate arguments.","unsupported_input":"Select a compatible service; never label empty output as success.","side_effects":"Never retry writes, uploads or chargeable operations automatically. A fallback must satisfy the same constraints."},"task_tests":[{"service_id":"svc_official_crossref","task":"scholarly_research","case_id":"crossref-public-metadata-v1","passed":true,"assertion":"The public query returns a work with a DOI, title and HTTPS source URL.","failure":null,"executed_at":"2026-10-22T07:59:05.419Z","latency_ms":1109,"tool":"GET public metadata API","arguments":{"url":"https://api.crossref.org/works?query=document%20information%20extraction&rows=2"},"fixture_kind":"public_read_only_task","limitations":"One query checks metadata fields only. No full-text extraction, source quality, general relevance or reliability claim."}],"execution_performed":false,"feedback_url":"/services/feedback?service_id=svc_official_crossref","workspace_url":"/workspace","limitations":"Metadata and DOI lookup, not article full-text extraction or a quality ranking."},"execution_performed":false,"requires_consumer_authorization":true,"instructions":["Read the source and check this service can perform the specific task.","Resolve account requirements, price and permissions with the provider.","Configure the endpoint in your own client; do not send provider secrets to Evident.","Authorize each consequential action in the client. A listing or handoff is not proof of use."],"connection_page":"https://evidentagents.com/services/connect?service_id=svc_official_crossref","feedback_url":"https://evidentagents.com/services/feedback?service_id=svc_official_crossref","feedback_api":"https://evidentagents.com/api/v3/service-feedback?service_id=svc_official_crossref","review_status":"Consumer-confirmed service feedback is available as self-reported. Verified execution reviews are not open; existing purchase reviews remain separate."}