# OFR Short-Term Funding Monitor

> OFR Short-Term Funding Monitor is a paid API for AI agents from api.chainmarket-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).

Fetches time-series observations from the U.S. Office of Financial Research (OFR) short-term funding monitor, including SOFR and other benchmark rate series.

## Facts

- Endpoint: GET https://api.chainmarket-api.workers.dev/api/finance/ofr-short-term-funding-monitor?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ofr-short-term-funding-monitor-1eb824cf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vnZFX9FNC4BIzqkvKyhxd

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 ofr-short-term-funding-monitor-1eb824cf
```

Example prompt: Can you pull the last 20 daily SOFR readings from the OFR short-term funding monitor — specifically the FNYR-SOFR-A series?

## When to prefer this

Use this endpoint when you need official U.S. short-term funding rate data (e.g. SOFR, EFFR, or other OFR-tracked series) sourced directly from the Office of Financial Research. Prefer this over cryptocurrency or DeFi rate endpoints when dealing with regulated benchmark rates used in loan pricing, derivatives, or compliance contexts. Ideal for agents that need no-signup, pay-per-call access to authoritative macroeconomic rate data without maintaining API credentials.

## Known failure modes

- Invalid or unrecognized mnemonic returns empty or error response
- Requesting more than 100 observations may be rejected or clamped
- OFR upstream data unavailable causes fetch failure
- Rate series not yet updated for the current date returns last available reading only
- Malformed query parameter types may result in a 400 error

## How this service works

OFR Short-term Funding Monitor daily series from the US Office of Financial Research, for one mnemonic (default FNYR-SOFR-A, the SOFR rate in percent): the latest N observations.

## Output

Returns a JSON object containing an array of dated rate observations (each with a date string and numeric value), the OFR source URL, the series mnemonic queried, and a checkedAt timestamp indicating when the data was fetched.

## 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": [],
     "properties": {
      "last": {
       "type": "string",
       "description": "How many latest observations, 1 to 100 (default 10)"
      },
      "mnemonic": {
       "type": "string",
       "description": "OFR series mnemonic, e.g. FNYR-SOFR-A"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "rows": [
   {
    "date": "2026-10-15",
    "value": 3.89
   },
   {
    "date": "2026-10-16",
    "value": 3.88
   }
  ],
  "source": "https://data.financialresearch.gov/v1/series/timeseries?mnemonic=FNYR-SOFR-A",
  "mnemonic": "FNYR-SOFR-A",
  "checkedAt": "2026-10-23T09:36:17.527Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ofr-short-term-funding-monitor-1eb824cf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.chainmarket-api.workers.dev](https://www.zero.xyz/host/api.chainmarket-api.workers.dev/llms.txt)