# Losbeto Brazil Yield Curve

> Losbeto Brazil Yield Curve is a paid API for AI agents from api.losbeto.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Returns Brazil interest rate yield curve data sourced from BCB/B3 macro data feeds

## Facts

- Endpoint: GET https://api.losbeto.xyz/br-curve
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/losbeto-brazil-yield-curve-36c08948
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XVAFv0UJ-V8APa5m2hKcW

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-yield-curve-36c08948
```

Example prompt: Pull the current Brazil yield curve from Losbeto — I need the full BRL interest rate term structure from BCB/B3 data right now, no account needed.

## When to prefer this

Choose this endpoint when you need Brazil-specific interest rate yield curve data sourced from official BCB/B3 feeds, especially when you want pay-per-call access with no API key or account setup, and you are operating in an agentic context with USDC payment capability on Base or Solana.

## Known failure modes

- Payment not received — 402 response if USDC payment on Base or Solana is not provided or fails
- Upstream data unavailable — BCB/B3 data feed temporarily down
- Network timeout — slow response if upstream macro data source is delayed
- Invalid payment network — payment sent on unsupported chain

## 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 interest rate yield curve, including rates across multiple maturities sourced from BCB (Banco Central do Brasil) and B3 exchange macro data feeds.

## 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",
     "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-yield-curve-36c08948/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.losbeto.xyz](https://www.zero.xyz/host/api.losbeto.xyz/llms.txt)