# Duty Drawback (19 USC 1313) Estimator

> Duty Drawback (19 USC 1313) Estimator is a paid API for AI agents from x402-niche-briefs.fly.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).

Estimates the 99% duty refund available under 19 USC 1313 for unused, manufacturing, or rejected merchandise drawback claims.

## Facts

- Endpoint: GET https://x402-niche-briefs.fly.dev/v1/duty-drawback-estimator?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/duty-drawback-19-usc-1313-estimator-4ff259f0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0yaO1LA6wfEi754iH4QCt

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 duty-drawback-19-usc-1313-estimator-4ff259f0
```

Example prompt: I paid $80,000 in import duties and exported 90% of the goods unused — can you estimate my duty drawback refund under the unused direct type using the 19 USC 1313 estimator?

## When to prefer this

Use this endpoint when you need a quick, legally-grounded estimate of US customs duty drawback eligibility under 19 USC 1313 without engaging a customs broker. It is ideal for pre-filing triage, CFO reporting, or automated trade compliance workflows where a fast approximation of 99% duty recovery is needed. Prefer this over generic tax calculators because it understands the four specific drawback types and their distinct legal provisions and deadlines.

## Known failure modes

- Missing required query parameters (duties_paid_usd, exported_pct, type) returns an error
- Invalid drawback type enum value (not one of unused_direct, unused_substitution, manufacturing, rejected) causes a bad request
- Non-numeric values for duties_paid_usd or exported_pct cause parsing errors
- exported_pct outside 0–100 range may produce unexpected results
- Service unavailability on fly.dev infrastructure returns 5xx errors

## How this service works

Estimate 99% refund on unused/manufacturing/rejected drawback.

## Output

Returns the estimated refund in USD (99% of eligible duties), the applicable legal provision under 19 USC 1313, a list of key filing deadlines, a note with context, a disclaimer, and the as-of date of the estimate. Input values are echoed back for confirmation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "duties_paid_usd",
      "exported_pct",
      "type"
     ],
     "properties": {
      "type": {
       "enum": [
        "unused_direct",
        "unused_substitution",
        "manufacturing",
        "rejected"
       ],
       "type": "string",
       "description": "Drawback type"
      },
      "exported_pct": {
       "type": "string",
       "description": "% exported/destroyed"
      },
      "duties_paid_usd": {
       "type": "string",
       "description": "Duties paid on imports"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "input",
      "est_refund_usd",
      "provision",
      "deadlines",
      "note",
      "disclaimer",
      "as_of"
     ],
     "properties": {
      "note": {
       "type": "string"
      },
      "as_of": {
       "type": "string"
      },
      "input": {
       "type": "object",
       "required": [
        "duties_paid_usd",
        "exported_pct",
        "type"
       ],
       "properties": {
        "type": {
         "type": "string"
        },
        "exported_pct": {
         "type": "number"
        },
        "duties_paid_usd": {
         "type": "number"
        }
       }
      },
      "deadlines": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "provision": {
       "type": "string"
      },
      "disclaimer": {
       "type": "string"
      },
      "est_refund_usd": {
       "type": "number"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/duty-drawback-19-usc-1313-estimator-4ff259f0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-niche-briefs.fly.dev](https://www.zero.xyz/host/x402-niche-briefs.fly.dev/llms.txt)