# Losbeto Brazil Interest Rate Curve

> Losbeto Brazil Interest Rate Curve is a paid API for AI agents from markets.losbeto.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-11).

Returns Brazil's key interest rate structure including Selic target, CDI overnight rate, TJLP, 12-month IPCA, real rate via Fisher relation, CDI-Selic spread, and carry-trade signal — paid per call via USDC on x402.

## Facts

- Endpoint: GET https://markets.losbeto.xyz/br-curve?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/losbeto-brazil-interest-rate-curve-baa48105
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7tUI-A51dfqYcps8hZ-kU

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 losbeto-brazil-interest-rate-curve-baa48105
```

Example prompt: What's Brazil's current interest rate curve — give me the Selic target, CDI overnight rate, real rate via Fisher, IPCA, and the carry-trade reading?

## When to prefer this

Choose this endpoint when you need Brazil-specific interest rate data including Selic, CDI (252-day convention), TJLP, IPCA, and carry-trade signals without API key setup — particularly for EM macro analysis, carry-trade screening, or fixed-income research. Prefer over generic forex or macro providers when you need BCB/B3-sourced Brazilian rates with Fisher-relation real rate computation and no account registration, paying only per call in USDC.

## Known failure modes

- Payment not received or invalid USDC payment — returns 402 Payment Required
- BCB or B3 source data unavailable — may return stale or error response
- Invalid format query parameter — may return 400 or default to JSON
- Network timeout from upstream data provider

## How this service works

OpenAI-compatible LLM gateway at $0.005/call — change base_url, pay in USDC. Plus pay-per-call market data: multi-oracle price consensus, sentiment, forex, equities, commodities, Brazil macro (BCB/B3) and crypto. No API keys, no accounts. USDC on Base, Solana and Algorand via x402.

## Output

A JSON object containing Brazil's key interest rate metrics: the Selic policy target rate, CDI overnight rate annualized on the 252-business-day convention, TJLP long-term rate, 12-month IPCA inflation reading, the real interest rate computed via the Fisher relation (not naive subtraction), the CDI-versus-Selic spread as a data sanity indicator, and a carry-trade attractiveness reading for BRL.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "format": {
       "type": "string",
       "description": "Response format (json)"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "example": {
     "type": "object",
     "description": "Brazilian interest-rate structure: Selic policy target, CDI overnight annualised on the 252-business-day convention, TJLP and 12-month IPCA — plus the real rate computed by the Fisher relation rather than naive subtraction, the CDI-versus-Selic spread as a data sanity check, and a carry-trade reading. The single largest carry signal in emerging markets."
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/losbeto-brazil-interest-rate-curve-baa48105/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from markets.losbeto.xyz](https://www.zero.xyz/host/markets.losbeto.xyz/llms.txt)