generated: '2026-09-19'
method: probed
source: https://bianhuakai.club/.well-known/agent.json
description: >-
  OPC / 彼岸花开 (a one-person company - OPC - operated by Lei Zhang in Hangzhou, China) serves ONE
  A2A Agent Card from its own registrable domain, fetched verbatim on 2026-09-19; nothing here is
  generated or derived. The card describes "China On-Site Video Service": a human videographer who,
  given a Google Maps link or coordinates anywhere in China, goes to the spot and films ~10 minutes
  of unscripted footage, delivered by email as an MP4. It is an agent card fronting a HUMAN
  fulfilment service, not a software API - the JSON-RPC endpoint accepts a task and a person then
  films it. The card lives ONLY at the legacy pre-0.3 path /.well-known/agent.json; the canonical
  /.well-known/agent-card.json 404s. protocolVersion 0.3.0, preferredTransport JSONRPC, endpoint
  https://bianhuakai.club/a2a/ on the same host, securitySchemes {} (the endpoint is anonymous).
  Grades conformant against A2A 1.0.0.
discovery:
  path: /.well-known/agent.json
  canonical: false
  host: bianhuakai.club
  canonical_path_status: 404
  canonical_note: >-
    https://bianhuakai.club/.well-known/agent-card.json returns 404 {"error":"not found"} - the card
    is served at the legacy path only, one of the ~21% of catalog cards still living there.
  head_note: >-
    HEAD /.well-known/agent.json answers 404 while GET answers 200 application/json - a prober that
    uses HEAD will wrongly record this card as absent.
  false_positive_watch: >-
    https://bianhuakai.club/lei/.well-known/agent.json answers 200 text/html (the /lei/ marketing
    page is an SPA catch-all for every sub-path) - that is NOT a card; only the host-root path is.
x-evidence:
  fetched: '2026-09-19'
  url: https://bianhuakai.club/.well-known/agent.json
  http_status: 200
  content_type: application/json
  size_bytes: 1915
  file: bianhuakai-club-agent-card.json
  endpoint_probe: >-
    POST {"jsonrpc":"2.0","id":1,"method":"agent/getAuthenticatedExtendedCard"} to
    https://bianhuakai.club/a2a/ answered HTTP 200 with a proper JSON-RPC envelope
    {"error":{"code":-32601,"message":"Method not found: ..."}} - a live JSON-RPC 2.0 server, not a
    shell. No Authorization header was needed. A plain GET /a2a/ answers 404 {"error":"not
    found","path":"/a2a/"}; GET /a2a (no slash) 301s to /a2a/.
  endpoint_caveat: >-
    POST tasks/get with a never-created task id answered {"result":{"id":"<that id>","status":
    {"state":"completed"},"artifacts":[{"name":"confirmation","parts":[{"text":"Task <id> is
    completed. A human will review and film the requested location."}]}]}} - the server echoes ANY
    task id back as completed rather than returning TaskNotFound (-32001). Task state is therefore
    not reliably queryable from the A2A surface; fulfilment is confirmed by email, off-protocol.
  cors: "Access-Control-Allow-Origin: *; allowed headers Content-Type, Authorization, x-broker-token"
conformance:
  spec: A2A 1.0.0
  grade: conformant
  protocol_version: 0.3.0
  preferred_transport: JSONRPC
  deviations: []
  checks:
    capabilities_is_object: true
    protocol_version_present: true
    skills_is_array: true
    preferred_transport_present: true
    default_input_modes_present: true
    default_output_modes_present: true
  notes:
  - securitySchemes is an empty object and no security[] is declared - the JSON-RPC endpoint is anonymous, which the live probe confirmed, so this is not a deviation
  - capabilities declares streaming false, pushNotifications false, stateTransitionHistory true
  - no supportsAuthenticatedExtendedCard, documentationUrl or iconUrl fields; the provider block points at https://bianhuakai.club/lei/ (the human-facing service page)
  - served at the legacy path only (discovery.canonical false) - a location deviation from A2A 0.3+/RFC 8615, not a card-shape one
card:
  name: China On-Site Video Service
  description: "I'm Lei, a local based in Hangzhou, China. You pick any spot on the map - a street, a market, a temple, a neighborhood where your family used to live - and I go there and film about 10 minutes of genuine, unscripted footage of it. Delivered to your email."
  url: https://bianhuakai.club/a2a/
  version: 0.1.0
  author: Lei Zhang (OPC / 彼岸花开)
  provider_organization: OPC / 彼岸花开
  provider_url: https://bianhuakai.club/lei/
  skills: 1
  skill_ids: [film_video_at_location]
  skill_tags: [video, china, filming, local, footage, hangzhou, travel, genealogy, realestate, documentary]
  input_modes: [text/plain, application/json]
  output_modes: [application/json, text/plain]
  file: bianhuakai-club-agent-card.json
registry:
  listed_on: a2aregistry.org
  registry_note: surfaced by the a2aregistry.org harvest of 2026-09-19 (415 agents); the live host above is the source of truth