api.financialdatasets.ai

Daily US Treasury par yield curve history: one object per business day with one key per tenor from 1 month to 30 years, in percent, newest first. Paginated with next_page_url. Use when an agent needs the yield curve over time, one tenor as a series or a spread such as 10-year minus 2-year. Non-Professional use; Professional use needs a plan at financialdatasets.ai.

Open endpoint ↗

Price per call: $0.02
Chain: Base
Method: GET
Paid calls · 30 days: 1

Call it from code

This API is run by its own provider and paid directly through x402. We list it so you can find it; we don't route or hold the payment.

import { x402Client, wrapFetchWithPayment } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";

const client = new x402Client();
registerExactEvmScheme(client, { signer: agentAccount });

const pay = wrapFetchWithPayment(fetch, client);
const res = await pay("https://api.financialdatasets.ai/macro/yield-curve", { method: "GET" });
console.log(await res.json());

https://api.financialdatasets.ai/macro/yield-curve