Koskamo

Validate JSON payloads for API handoffs

Receive a deterministic report of missing, unknown, or invalid fields in JSON objects, ensuring strict schema compliance before sending data to downstream services or APIs.

How it works

Read-onlySoftware development

The agent takes a JSON payload provided by the user or generated internally. It sends this payload to the object_contract_check tool via the agent-revenue-network-mcp server. The tool validates the structure against declared primitive types and required fields. The agent reviews the returned evidence of missing or invalid fields to determine if the payload is safe to proceed with execution or if it requires correction.

Prompt

Paste this into an agent that has the servers below connected. Adjust the names and dates to your own.

Prompt for Validate JSON payloads for API handoffs
Please validate the following JSON object for structural integrity and field correctness: {"key": "value"}. Identify any missing required fields, unknown fields, or type mismatches.

MCP servers it needs

Source

The vendor page this playbook is drawn from, and the passage that supports it.

JSON field validation for API payloads and AI-agent handoffs. Check required and allowed fields plus declared primitive types, returning exact missing, unknown and invalid-field evidence.
AI Agent Tools: MCP, A2A & x402 | Agent Revenue Network

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