MCPx runs consequential WebMCP workflows as durable transactions — recovering uncertain writes, reconciling authoritative state, and safely rolling back partial failures.
A consequential write can commit successfully while its response disappears in transit. Retrying may duplicate the mutation. Assuming failure may corrupt state.
Mutation dispatched across origins to the state-owning service.
Response packet dropped. Runtime halts blind retry to prevent duplicate creation.
Authoritative query discovers resource exists. Reconciled safely.
Every consequential WebMCP operation implements deterministic execution, inspection, and reverse compensation contracts.
Bind consequential actions to a stable operation identity across origins.
Ask the application that owns the resource what actually exists.
Resolve uncertain outcomes through authoritative inspection instead of blindly repeating the mutation.
Undo completed work in reverse dependency order and inspect again to verify absence.
Instead of guessing whether a consequential write succeeded, MCPx reconciles against authoritative service state before progressing or compensating.
The included reference workflow runs across four independent WebMCP services to demonstrate cross-origin execution, reconciliation, and human-approved Saga rollback.
When downstream steps fail, MCPx calculates safe reverse-order deletion and halts for human approval before removing live resources.
Connect compatible applications, discover their tools, define reliability contracts, and compose them into multi-step workflows without modifying the MCPx runtime.
Consequential systems cannot rely on optimistic transport. The application that owns the resource is the sole authority on state.
When transport acknowledgements drop, operations enter authoritative inspection rather than being written off as errors.
Every node transition, attempt, and inspection event is durably committed to PostgreSQL before downstream progression.
Saga rollbacks execute in strict reverse dependency order and inspect remote state to confirm deletion occurred.
MCPx never assumes external state; it queries the WebMCP application directly via its inspection contracts.
Connect WebMCP applications and execute consequential workflows with durable state, reconciliation, and controlled rollback.