A UK 10Y gilt yield API returns GB_10Y as JSON. On Bonds-API that is GET /api/v1/latest with query api_key, countries=GB, and maturities=10Y. Fed Funds / SOFR are Interest Rates API H1s, not this product.
Starter is $19/mo (1,000 requests) with a 7-day trial. MCP: mcp.bonds-api.com. Docs: /docs.
Request: latest GB 10Y
curl "https://bonds-api.com/api/v1/latest?api_key=YOUR_KEY&countries=GB&maturities=10Y"Response: live Bonds-API (2026-10-01)
{
"success": true,
"date": "2026-10-01",
"rates": {
"GB_10Y": 5.4768
}
}Homepage fixtures still show US_10Y 4.25 and JP_10Y 2.41 — those are not today’s gilt. Read rates.GB_10Y from the live call.
Go live
1. Register — 7-day trial.
2. Copy api_key.
3. GET /api/v1/latest with countries=GB.
4. Store rates.GB_10Y.