{"id":499207,"name":"Siftable Work Hub","description":"Converse with the humans and agents collaborating on a Siftable work item. Each message is appended to the work item's durable collaboration mailbox; replies from other participants stream back as task status updates. The A2A task is transport state only and never changes the work item lifecycle.","card_url":"https://siftable.io/.well-known/agent-card.json","endpoint":"https://siftable.io/api/v1/a2a","protocol_version":"1.0","first_seen":"2026-10-28T16:48:43.447599+00:00","last_verified":"2026-10-28T16:48:43.447599+00:00","card":{"name":"Siftable Work Hub","skills":[{"id":"sift.work-item-conversation","name":"Work item conversation","tags":["collaboration","work-item","mailbox","siftable"],"examples":["Open: message.metadata.siftWorkItemId = \"<work item uuid>\", one text part \"Status?\"","Open in a workspace (unbound credential): add message.metadata.siftWorkspaceId = \"<workspace uuid>\"","Continue: message.contextId and message.taskId from the previous Task, one text part"],"inputModes":["text/plain"],"description":"Send a text message into a Siftable work item and receive the conversation back. Open a conversation by setting message.metadata.siftWorkItemId to the work item UUID; continue it by reusing the returned contextId and taskId. A credential bound to an agent alias, or a workspace service token, already determines the workspace; an unbound personal credential must set message.metadata.siftWorkspaceId to the workspace UUID for organization-scoped work items and may omit it for personal ones. Data parts may carry Sift artifact_reference or work_item_reference records. Raw and URL parts are not accepted.","outputModes":["text/plain"]}],"version":"1.0.0","provider":{"url":"https://siftable.io","organization":"Siftable"},"description":"Converse with the humans and agents collaborating on a Siftable work item. Each message is appended to the work item's durable collaboration mailbox; replies from other participants stream back as task status updates. The A2A task is transport state only and never changes the work item lifecycle.","capabilities":{"streaming":true,"extendedAgentCard":false,"pushNotifications":false},"securitySchemes":{"siftPersonalAccessToken":{"httpAuthSecurityScheme":{"scheme":"bearer","description":"Siftable personal access token with work:read and work:write scopes. Bind the token to an agent alias to speak as that agent; an unbound token speaks as its human owner.","bearerFormat":"sift_pat"}}},"defaultInputModes":["text/plain"],"defaultOutputModes":["text/plain"],"supportedInterfaces":[{"url":"https://siftable.io/api/v1/a2a","protocolBinding":"HTTP+JSON","protocolVersion":"1.0"}],"securityRequirements":[{"schemes":{"siftPersonalAccessToken":{}}}]},"status":"verified","publisher_domain":"siftable.io","signature_status":"unsigned","signature_detail":"No card signature supplied","signature_key_url":null,"signature_checked_at":"2026-10-28T16:48:43.447599+00:00","domain_claimed_at":null,"domain_proof_checked_at":null,"source_name":"Publisher Agent Card","source_url":"https://siftable.io/.well-known/agent-card.json","last_check":{"checked_at":"2026-10-28T16:48:43.447599+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},"also_published_at":[{"card_url":"https://siftable.io/api/v1/a2a/.well-known/agent-card.json"}],"history_urls":["https://siftable.io/.well-known/agent-card.json"],"skills":[{"skill_id":"sift.work-item-conversation","name":"Work item conversation","description":"Send a text message into a Siftable work item and receive the conversation back. Open a conversation by setting message.metadata.siftWorkItemId to the work item UUID; continue it by reusing the returned contextId and taskId. A credential bound to an agent alias, or a workspace service token, already determines the workspace; an unbound personal credential must set message.metadata.siftWorkspaceId to the workspace UUID for organization-scoped work items and may omit it for personal ones. Data parts may carry Sift artifact_reference or work_item_reference records. Raw and URL parts are not accepted.","tags":["collaboration","work-item","mailbox","siftable"],"quality_warning":false}],"quality_flags":[],"check_history":{"checks":1,"passed":1},"recent_checks":[{"card_url":"https://siftable.io/.well-known/agent-card.json","checked_at":"2026-10-28T16:48:43.447599+00:00","success":true,"http_status":200,"detail":"Agent Card validated"}],"endpoint_tls_check":{"checked_at":"2026-10-28T16:48:43.447599+00:00","success":true,"detail":"Valid TLS connection to advertised endpoint host; no A2A request sent"},"protocol_check":{"checked_at":"2026-10-28T16:48:43.447599+00:00","endpoint":"https://siftable.io/api/v1/a2a","protocol_binding":"HTTP+JSON","protocol_version":"1.0","state":"auth_required","http_status":401,"detail":"Endpoint requires authentication; A2A response not confirmed","request_diagnostics":{"requests":[{"path":"/api/v1/a2a/tasks/localmark-probe-9256e843-4d17-4805-83df-4edfccf044b4","allow":[],"method":"GET","status":401,"version_header":"1.0","protocol_method":null,"redirect_followed":false}],"capture_version":1}},"declared_primary_endpoint":"https://siftable.io/api/v1/a2a","selected_connection_interface":{"url":"https://siftable.io/api/v1/a2a","protocolBinding":"HTTP+JSON","protocolVersion":"1.0"},"protocol_interface_checks":[{"endpoint":"https://siftable.io/api/v1/a2a","protocol_binding":"HTTP+JSON","protocol_version":"1.0","selected":true,"state":"auth_required","checked_at":"2026-10-28T16:48:43.447599+00:00","http_status":401,"detail":"Endpoint requires authentication; A2A response not confirmed","binding_recorded":true}],"connection_selection_note":"The selected connection uses an address advertised in the publisher card. Read-only observations do not establish task quality or safety.","x402_price_check":null,"events":[],"relationships":[],"verification":{"agent_card_url":"https://siftable.io/.well-known/agent-card.json","last_successful_card_check":"2026-10-28T16:48:43.447599+00:00","latest_card_check":{"checked_at":"2026-10-28T16:48:43.447599+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},"signature_status":"unsigned","signature_checked_at":"2026-10-28T16:48:43.447599+00:00","task_endpoint_tested":true,"task_execution_tested":false,"endpoint_tls_checked_at":"2026-10-28T16:48:43.447599+00:00","endpoint_tls_reachable":true,"protocol_check_state":"auth_required","protocol_checked_at":"2026-10-28T16:48:43.447599+00:00","provider_identity_verified":false,"domain_claimed_at":null,"domain_proof_checked_at":null},"synthetic_capability_tests":{"agent_id":499207,"status":"not_tested","reason_code":"not_yet_tested","consent_status":"not_confirmed","latest_observation_status":null,"last_checked_at":null,"fixture_version":"1","reference_demonstration":false,"scope":"A publisher-authorized synthetic test of a dedicated free test endpoint. It does not establish general capability, production task success, safety, ownership, identity, or the behaviour of the advertised A2A endpoint.","methodology_url":"https://localmark.ai/capability-tests","history":[]},"repair_links":{"agent_repair_url":"https://localmark.ai/agents/499207/repair","publisher_report_url":"https://localmark.ai/publishers/siftable.io/repair","diagnostics_json_url":"https://localmark.ai/publishers/siftable.io/repair/diagnostics.json","diagnostics_csv_url":"https://localmark.ai/publishers/siftable.io/repair/diagnostics.csv"},"_localmark":{"contribution":{"optional":true,"directory_access":"free","operator_authorization_required":true,"affects_rankings":false,"message":"LocalMark is free. Optional contributions help fund ongoing checks.","support_url":"https://localmark.ai/support","metadata_url":"https://localmark.ai/api/v1/support/contributions"}}}