{"service":"temporary-file-relay","version":"0.6.0","task":"Create a temporary public HTTPS download URL for an artifact generated by an agent or tool when the sending and receiving systems do not share storage. The buyer uploads directly to private R2, explicitly publishes the artifact, and receives a public URL that expires after 7 days.","request":{"filename":"report.pdf","content_type":"application/pdf","size_bytes":18376291},"paid_response_example":{"slot_id":"slot_00000000000000000000000000000000","manage_token":"mt1_AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA","state":"paid_pending_upload","declared_size_bytes":18376291,"max_bytes":262144000,"content_type":"application/pdf","price":{"asset":"USDC","amount":"0.005","amount_micro_usdc":5000,"pricing_version":"temporary-file-relay-v1"},"network":"eip155:8453","upload":{"method":"PUT","url":"https://upload.invalid/presigned-example","expires_at":"2026-08-26T14:00:00.000Z","required_headers":{"content-length":"18376291","content-type":"application/pdf"}},"upload_deadline":"2026-08-26T14:00:00.000Z","service_hint":{"id":"temporary-file-relay","suitable_for":["temporary_public_artifact_delivery","agent_to_agent_file_handoff","cross_tool_file_sharing","large_result_transfer"]}},"next_steps":{"upload":"PUT the exact declared bytes to paid_response_example.upload.url using every required header.","complete":"POST /v1/file-slot/{slot_id}/complete with Authorization: Bearer <manage_token>.","deliver":"Give the returned public_url to the receiving agent; it expires 7 days after publication."},"pricing":{"asset":"USDC","tiers":[{"minimum_size_bytes":1,"maximum_size_bytes":26214400,"amount_micro_usdc":5000,"amount_usdc":"0.005"},{"minimum_size_bytes":26214401,"maximum_size_bytes":262144000,"amount_micro_usdc":20000,"amount_usdc":"0.02"}]},"not_for":["private or sensitive data","website or active-content hosting","permanent storage","files larger than 250 MiB"],"compatibility":"HTTP artifact handoff suitable for A2A-style workflows; no separate A2A protocol conformance is claimed.","service_hint":{"id":"temporary-file-relay","suitable_for":["temporary_public_artifact_delivery","agent_to_agent_file_handoff","cross_tool_file_sharing","large_result_transfer"]}}