# US CBP Section 321 De Minimis & Entry Type Checker

> US CBP Section 321 De Minimis & Entry Type Checker 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 2026-10-30).

Evaluates whether a shipment qualifies for Section 321 ($800 de minimis) duty-free entry and recommends the appropriate CBP entry type (Type 86, Type 11 Informal, or Type 01 Formal), factoring in 2025/2026 China/Section 301 exclusions.

## Facts

- Endpoint: GET https://x402-niche-briefs.fly.dev/v1/de-minimis-321-eligibility?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/us-cbp-section-321-de-minimis-entry-type-checker-24981675
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FQ4YI5EwQG12DJEuXLZWS

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 us-cbp-section-321-de-minimis-entry-type-checker-24981675
```

Example prompt: Can you check if my $180 shipment from China qualifies for Section 321 de minimis duty-free entry under 2025 CBP rules, and tell me what entry type I should use — the goods are subject to Section 301 tariffs?

## When to prefer this

Choose this endpoint when you need a fast, deterministic evaluation of Section 321 de minimis eligibility and CBP entry type selection for a specific shipment, especially when dealing with Chinese-origin goods potentially subject to Section 301 tariffs. Prefer this over general tariff lookup tools when you specifically need the Type 86 vs informal vs formal entry decision tree and anti-structuring guidance for 2025/2026 enforcement rules.

## Known failure modes

- Missing required query parameters (shipment_value_usd, origin, subject_to_301) returns a validation error
- Invalid ISO country code may produce unexpected results or an error
- subject_to_301 must be the string 'true' or 'false', not a boolean — type mismatch may cause failure
- Regulatory data reflects a specific as_of date and may not reflect real-time CBP rule changes
- Payment of $0.01 USDC required per call; insufficient funds returns 402 Payment Required

## How this service works

US CBP Section 321 ($800 de minimis) eligibility & 2025/2026 China/Section 301 exclusion evaluator. Pass ?shipment_value_usd=180&origin=CN&subject_to_301=true. Returns Section 321 eligibility, recommended CBP Entry Type (Type 86 vs Type 11 Informal vs Type 01 Formal), anti-structuring rules, and bond/MPF checklist. Educational reference only; not legal advice.

## Output

Returns a JSON object indicating whether the shipment is Section 321 eligible (boolean), the recommended CBP entry type (e.g. Type 86, Type 11 Informal, Type 01 Formal), an array of 2025/2026 enforcement notes relevant to China and Section 301 exclusions, a fallback entry checklist covering bond and MPF requirements, and a legal disclaimer noting educational use only.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "shipment_value_usd",
      "origin",
      "subject_to_301"
     ],
     "properties": {
      "origin": {
       "type": "string",
       "description": "Country of origin ISO code (e.g. CN, VN,CA)"
      },
      "subject_to_301": {
       "enum": [
        "true",
        "false"
       ],
       "type": "string",
       "description": "Whether the HTS classification is subject to Section 301/232/201 tariffs"
      },
      "shipment_value_usd": {
       "type": "string",
       "description": "Shipment aggregate fair retail value in USD"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "as_of",
      "inputs",
      "section_321_eligible",
      "recommended_entry_type",
      "enforcement_notes_2025_2026",
      "fallback_entry_checklist",
      "disclaimer"
     ],
     "properties": {
      "as_of": {
       "type": "string"
      },
      "inputs": {
       "type": "object",
       "required": [
        "shipment_value_usd",
        "origin",
        "subject_to_301"
       ],
       "properties": {
        "origin": {
         "type": "string"
        },
        "subject_to_301": {
         "type": "boolean"
        },
        "shipment_value_usd": {
         "type": "number"
        }
       }
      },
      "disclaimer": {
       "type": "string"
      },
      "section_321_eligible": {
       "type": "boolean"
      },
      "recommended_entry_type": {
       "type": "string"
      },
      "fallback_entry_checklist": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "enforcement_notes_2025_2026": {
       "type": "array",
       "items": {
        "type": "string"
       }
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/us-cbp-section-321-de-minimis-entry-type-checker-24981675/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)