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CardSmith Agent Card Generator & Grader
x402
CardSmith Agent Card Generator & Grader is a paid API for AI agents from stall-row-production.up.railway.app, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-29).
Generates a structurally valid A2A/AgentWorld agent card JSON or grades and itemizes defects in a supplied agent card.
Price / call$0.1
Success—
StatusUnknown
How this service works
Generate or grade an agent card (the /.well-known/agent-card.json an agent publishes for A2A and AgentWorld-style registries). Generate builds a structurally valid card from your fields; grade scores a supplied card and itemizes its defects. Use this when you are registering an agent and want the card right the first time.
Output
In 'generate' mode, returns a structurally valid agent card JSON ready for publishing at /.well-known/agent-card.json. In 'grade' mode, returns a numeric score and an itemized list of defects found in the supplied card.
Example use cases
Register new agent on AgentWorld
“Generate a valid agent card for my new agent called 'PriceWatcher' — its description is 'Monitors crypto prices and sends alerts' and its skills are price-monitoring, alert-sending, and crypto-data-fetching. I want to publish it to AgentWorld.”
Grade existing agent card for defects
“Grade this agent card I already wrote and tell me everything that's wrong with it — I want a score and a full list of defects before I publish it to any registry.”
Fix agent card before A2A submission
“I'm about to submit my agent to an A2A registry. Can you generate a structurally correct agent card for my agent named 'InvoiceBot' with the description 'Processes and pays invoices automatically' and skills like invoice-parsing and payment-execution?”
Technical details
Endpoint
POSThttps://stall-row-production.up.railway.app/v1/card-smith?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to create or validate an agent card for A2A or AgentWorld-style registries. It is purpose-built for the agent card format, unlike generic JSON validators or schema checkers. Use it before registering any agent to ensure the card is correct the first time, or to audit an existing card for compliance defects.
Side effects
- Missing required mode field returns an error
- Invalid mode value (not 'generate' or 'grade') causes rejection
- In grade mode, missing or malformed card object causes failure
- In generate mode, missing name or description may result in incomplete card
- x402 payment not processed leads to 402 response
- Malformed skills array may cause unexpected output
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| card | object | |
| mode | string | |
| name | string | |
| skills | array | |
| description | string |
Tags
x402
Reviews
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