MCP Tools

discover_services

Searches Synapse provider services and returns current schemas, pricing, provider metadata, and invocation policy.

Use it before every paid action.

Typical prompt:

Discover services for image captioning. Show the service id, price model, input schema, and max cost.
Do not invoke anything yet.

invoke_and_pay

Invokes a selected service through Synapse Gateway.

This tool can charge the Agent Credential. Treat it as a consequential/write action in clients that support action controls.

Rules:

• Fixed-price services must pass the current costUsdc observed from discover_services.
• Token-metered services must pass maxCostUsdc as the budget ceiling.
• Include an idempotency key when the client can generate one.
• If Gateway returns PRICE_MISMATCH, call discover_services again and retry only with the fresh price.

get_receipt

Fetches invocation and settlement evidence after a call.

Use it for:

• User-visible receipts.
• Retry and reconciliation decisions.
• Auditing charged amount, provider status, and invocation status.

Safe default tool policy