# Card Hedge FMV by Certificate Number

> Card Hedge FMV by Certificate Number is a paid API for AI agents from api.cardhedger.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Returns the Fair Market Value (FMV) for a graded trading card identified by its grader certificate number.

## Facts

- Endpoint: POST https://api.cardhedger.com/v1/agent/cards/fmv-by-cert?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/card-hedge-fmv-by-certificate-number-29297b72
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aegjWYILTHxgQQGtUp27H

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability card-hedge-fmv-by-certificate-number-29297b72 -d '<json body>'
```

Example prompt: What's the fair market value of my PSA-graded card with certificate number 12345678?

## When to prefer this

Use this endpoint when you have a specific grader certificate number and need the Fair Market Value for that exact graded card. Prefer this over search-based endpoints when the cert number is already known, as it provides a direct and precise lookup. If you need pricing across all grades or comparable sales history, use the sibling endpoints instead.

## Known failure modes

- Certificate number not found in the database — returns an error or empty result
- Invalid or unsupported grading company specified — may default to PSA or return an error
- Certificate number format mismatch — different graders use different cert number formats
- Card has insufficient recent sales data to compute a reliable FMV
- API payment failure via x402 protocol — call rejected if USDC payment not processed

## How this service works

Get the Fair Market Value (FMV) for a card by grader certificate number.

## Output

Returns the Fair Market Value (FMV) for the specified graded card identified by its certificate number and grading company, giving the agent a current market price estimate for that specific graded card.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "cert": {
   "type": "string",
   "description": "Certificate number to look up"
  },
  "grader": {
   "type": "string",
   "default": "PSA",
   "description": "Grading company (defaults to PSA)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/card-hedge-fmv-by-certificate-number-29297b72/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.cardhedger.com](https://www.zero.xyz/host/api.cardhedger.com/llms.txt)