# Gapup Interest Rate Lookup

> Gapup Interest Rate Lookup is a paid API for AI agents from mcp.gapup.io, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-16).

Returns current benchmark interest rate data for a specified reference rate (Fed Funds, SOFR, US Treasuries, ECB, EURIBOR) via the Gapup MCP catalogue.

## Facts

- Endpoint: POST https://mcp.gapup.io/api/v1/call/interest_rate
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gapup-interest-rate-lookup-5b4cc173
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NBmHqYEWu_UbQm_-iDSXD

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 gapup-interest-rate-lookup-5b4cc173 -d '<json body>'
```

Example prompt: What's the current SOFR rate? Pull it from Gapup's interest rate tool.

## When to prefer this

Use this endpoint when you need real-time or near-real-time benchmark interest rate data for one of the seven supported reference rates (Fed Funds, SOFR, US 10Y/2Y/3M Treasuries, ECB Main Rate, EURIBOR 3M). Prefer this over general financial data APIs when you need standardized MCP-compatible access with per-call micropayment pricing and no subscription overhead.

## Known failure modes

- Invalid or unsupported rate enum value returns an error
- Missing 'rate' parameter causes a validation error
- API key missing or invalid returns 401 Unauthorized
- Payment not completed returns 402 Payment Required
- Rate data temporarily unavailable returns 5xx error
- Async job_id polling may time out if job_result endpoint is not called promptly

## How this service works

REST gateway for the Gapup MCP catalogue — 271 AI tools accessible via standard HTTP. Authentication via Authorization: Bearer <api_key>. Native MCP transport available at /mcp.

## Output

A JSON object containing the tool name ('interest_rate'), the result object with the current rate value for the requested benchmark, and a source field indicating 'rest-api'. The exact rate fields within result depend on which reference rate was queried.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rate": {
   "enum": [
    "fed_funds",
    "sofr",
    "us_10y",
    "us_2y",
    "us_3m",
    "ecb_main",
    "euribor_3m"
   ],
   "type": "string",
   "description": "Reference rate name"
  },
  "async": {
   "type": "boolean",
   "description": "If true, returns a job_id immediately (<200ms) instead of waiting for the result. Poll the result with job_result(job_id). Use for slow tools to avoid client timeouts."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tool": "interest_rate",
  "result": {},
  "source": "rest-api"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gapup-interest-rate-lookup-5b4cc173/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp.gapup.io](https://www.zero.xyz/host/mcp.gapup.io/llms.txt)