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MoneyTools A2A Agent Card Validator
x402
MoneyTools A2A Agent Card Validator is a paid API for AI agents from tools.moneytools.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-11-05).
Fetches and validates an A2A agent-card.json (or legacy agent.json) from a given URL, checking required fields, skills, transport, and security declarations.
Price / call$0.002
Success—
StatusUnknown
How this service works
A2A Agent Card validator: Fetch /.well-known/agent-card.json (or legacy agent.json) and validate required A2A fields, skills, transport and security declarations. Free tier 10/day; then $0.002 via x402 (HTTP 402 + PAYMENT-REQUIRED) or X-API-Key credits. Not charged on failure. $0.002 USDC per call via x402 on Base. Run by MoneyTools.
Output
A JSON object indicating whether the agent card passed validation, listing any missing or invalid required A2A fields (name, description, skills, transport, security), along with payment metadata (whether the call was charged, network, amount in USD, and transaction ID).
Example use cases
Pre-launch agent card compliance check
“Before I publish my new AI agent, can you fetch and validate the agent card at https://api.myagent.dev and tell me if anything is missing or wrong in the A2A fields, skills, or security declarations?”
Debugging a third-party agent card
“I'm trying to integrate with an agent at https://partner-agent.example.com but something seems off — can you fetch their A2A agent card and tell me what fields or declarations are invalid or missing?”
Automated CI check for agent card
“As part of our deployment pipeline, validate the agent card at https://staging.myservice.io and report any A2A compliance errors so we can block the release if it fails?”
Technical details
Endpoint
GEThttps://tools.moneytools.dev/v1/a2a-card?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically verify that an A2A agent card (/.well-known/agent-card.json or agent.json) is correctly structured and compliant — especially before integrating with a third-party agent, during CI/CD pipelines for your own agent deployments, or when debugging interoperability issues. It is purpose-built for the A2A protocol spec and is not charged on failure, making it safe to use for speculative checks.
Side effects
- Target URL is unreachable or returns a non-200 status — validation fails but no charge is applied
- Agent card JSON is malformed and cannot be parsed — validation error returned
- URL does not point to a valid agent card endpoint (e.g. wrong path) — returns field errors
- Free tier of 10/day exhausted without an API key or x402 payment — HTTP 402 returned
- Invalid or missing query parameter — request rejected with an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json"
}Tags
x402
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