# agentfeeds.jp JGB Yield Curve

> agentfeeds.jp JGB Yield Curve is a paid API for AI agents from api.agentfeeds.jp, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Fetches the Japanese Government Bond yield curve (15 tenors from 1 to 40 years) from Japan Ministry of Finance daily reference data.

## Facts

- Endpoint: GET https://api.agentfeeds.jp/v1/jp/rates/jgb_curve
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentfeeds-jp-jgb-yield-curve-b4a5a4d6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iXr3qAzmvBMfC1X20a98_

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 agentfeeds-jp-jgb-yield-curve-b4a5a4d6
```

Example prompt: Can you pull today's full Japanese Government Bond yield curve from the Ministry of Finance — I need all the tenors from 1 year out to 40 years.

## When to prefer this

Use this endpoint when you need the full long-end Japanese Government Bond yield curve across 15 tenors (1–40 years) sourced directly from Japan's Ministry of Finance. Prefer this over boj.rates (which covers the short-end policy rate) when you need the complete term structure for fixed income analysis, duration modeling, or Japan sovereign yield comparisons.

## Known failure modes

- Non-business day or market holiday date returns no data or falls back to most recent available day
- Future dates return an error or empty result
- Malformed ISO date string causes a validation error
- Service unavailable if MOF source is delayed or not yet published for the day

## How this service works

Japanese government bond yield curve (1 to 40 years, 15 tenors) from the Ministry of Finance's daily reference series. Complements boj.rates (the short-end policy-rate proxy) with the long end of the curve. Factual published data only; not investment advice or a rate forecast.

## Output

Returns a structured set of 15 JGB tenor yield data points (maturities from 1 to 40 years) from Japan's Ministry of Finance daily reference series, for the requested date or the most recent published business day. Includes yield percentages per tenor.

## 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",
     "properties": {
      "date": {
       "type": "string",
       "description": "optional ISO date; defaults to the most recent published business day"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentfeeds-jp-jgb-yield-curve-b4a5a4d6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.agentfeeds.jp](https://www.zero.xyz/host/api.agentfeeds.jp/llms.txt)