ShardLink Control Plane

• Discover Capability Graph discover_capability_graph

  Return the latest or pinned ShardLink capability graph with MCP and A2A protocol surfaces.

  discovery contracts capability-graph mcp a2a
  2 examples

  • Get the latest ShardLink capability graph.
  • Return capability graph version 2026-03-04.v1.
• Inspect Dual Plane Contract inspect_dual_plane_contract

  Return the split-authority contract that defines ShardLink and SignalHub boundaries.

  contracts dual-plane governance
  2 examples

  • Show the dual-plane contract.
  • Describe the ShardLink and SignalHub authority split.
• Inspect Error Catalog inspect_error_catalog

  Return deterministic error metadata, retryability, and idempotency semantics for machine callers.

  contracts errors retry idempotency
  2 examples

  • List deterministic error metadata.
  • Show retryable ShardLink error codes.
• List Action Descriptors list_action_descriptors

  Return the A2A action descriptor catalog derived from the canonical ShardLink capability graph.

  discovery actions a2a execution
  2 examples

  • List ShardLink A2A actions.
  • Show the action descriptors for machine execution.
• Invoke Capability Action invoke_capability_action

  Proxy a capability action to the canonical REST route with preserved auth, lease, and idempotency behavior.

  execution rest idempotency leases
  2 examples

  • Invoke a public ShardLink capability action.
  • Call a ShardLink workspace action with path params and body.

  Requires: bearerAuth, or controlPlaneAdminKey

• Read Workspace Status read_workspace_status

  Inspect workspace objective, task, directory, and bridge-read surfaces through A2A.

  status workspace tasks bridge
  2 examples

  • Read a task status.
  • Read the workspace directory.
• Execute Provider Quote execute_provider_quote

  Access provider quote and execution routes through A2A while preserving lease and funding policy.

  providers billing execution lease
  2 examples

  • Create a provider quote for a workspace.
  • Execute a provider quote with an idempotency key.

  Requires: bearerAuth, or controlPlaneAdminKey

Interfaces

Capabilities

Streaming

Yes

Push notifications

No

Extended card for signed-in callers

Not declared

Security and formats

Requires

Not declared

Schemes

bearerAuth (http), controlPlaneAdminKey (api_key)

Accepts

text/plain, application/json

Returns

text/plain, application/json