# Japan Upcoming Grants API

> Japan Upcoming Grants API is a paid API for AI agents from api.kasanegi.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Returns a list of upcoming Japanese government and public grant opportunities, filterable by prefecture and time window

## Facts

- Endpoint: GET https://api.kasanegi.com/v1/grants/upcoming
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/japan-upcoming-grants-api-f924eb0d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UBo2IqO9VH6NzQ_Y5ZPfk

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 japan-upcoming-grants-api-f924eb0d
```

Example prompt: Show me upcoming government grants available in Kanagawa Prefecture over the next 60 days — return up to 20 results.

## When to prefer this

Use this endpoint when you need structured, clean data on upcoming Japanese government grant opportunities without scraping official Japanese government sites. Prefer this over manual scraping when you need prefecture-level filtering or want machine-readable results. Particularly useful for agents helping Japanese businesses discover public funding opportunities within a defined time window.

## Known failure modes

- Invalid prefecture name returns empty results or 400 error
- days parameter out of range (>90 or <1) returns 400 validation error
- limit out of range (>50 or <1) returns 400 validation error
- No grants found for the given filters returns empty array
- Payment not fulfilled returns 402 Payment Required
- Rate limit exceeded returns 429

## How this service works

Stop scraping Japanese government and public-data sites. Call clean Japan payroll, company, and grant APIs over one host. Preview free; one public marketplace listing covers all current products; x402 direct is available for agent-native buyers.

## Output

A JSON array of upcoming Japanese public grant opportunities, each with grant name, deadline, eligibility details, and prefecture, filtered by the specified time window and prefecture.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "method"
   ],
   "properties": {
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "days": {
       "type": "integer",
       "default": 90,
       "maximum": 90,
       "minimum": 1,
       "description": "Window in days 1-90."
      },
      "limit": {
       "type": "integer",
       "default": 10,
       "maximum": 50,
       "minimum": 1,
       "description": "Max items 1-50."
      },
      "prefecture": {
       "type": "string",
       "description": "Prefecture filter."
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "mimeType": "application/json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/japan-upcoming-grants-api-f924eb0d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.kasanegi.com](https://www.zero.xyz/host/api.kasanegi.com/llms.txt)