connector_capability_unsupported

Not on this platform. Answered with 400.

What it means

The verb exists on every platform; this platform does not carry the Capability behind it. Direct messages are Mastodon's and not Bluesky's.

What to do

Read capabilities on GET /api/identities/{handle}/connectors: it names, per Connector, what its platform has.

The body

{
  "type": "https://tigby.eu/problems/connector_capability_unsupported",
  "title": "Not on this platform",
  "status": 400,
  "detail": "…what was refused, naming this request's own values",
  "code": "connector_capability_unsupported",
  "doc_url": "https://docs.tigby.eu/errors/connector_capability_unsupported",
  "agent_hint": "…the next step, for software"
}

Branch on code. The detail names this request's own Handle, id or limit and is not part of the contract.